US5757231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Feed-forward amplifying device and base station with feed-forward amplifying device
Assignee: Fujitsu Ltd
•
Filing: 1996-06-11
•
Granted: 1998-05-26
•
Expires: 2016-06-11
Abstract
Abstract The present invention relates to a feed-forward amplifying device suitable for radio communications systems such as digital automobile telephones. The feed-forward amplifying device includes a distortion extracting loop circuit unit unit including a main amplifier which amplifies a main signal in a main signal system, the main amplifier having a first transistor and a first matching circuit arranged to at least one of the input side and the output side of the first transistor, the distortion extracting loop circuit unit generating a distortion extracted signal obtained by canceling a main signal component of an output from the main amplifier; and a distortion removing loop circuit unit including an auxiliary amplifier, with a passage delay time shorter than that of the main amplifier, which amplifies the distortion extracting signal from the distortion extracting loop circuit unit, the auxiliary amplifier including a second transistor with an output smaller than that of the first transistor and a second matching circuit arranged to at least one of the input side and the output side of the second transistor, the distortion removing loop circuit unit outputting only the main signal component from a signal in the main signal system at the rear stage of the main amplifier using the distortion extracted signal amplified by the auxiliary amplifier. The object of the invention is to improve the signal processing speed at a small power consumption and to realize a small, high-power feed-forward amplifying device.
Inventors
- 👤 Norio Tozawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:40
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/189; H03F3/19; H03F3/193; H03F3/1935; H03F1/00; H03F1/32; H03F1/3223; H03F1/3229
Claims Analysis
Total Claims: 59
Claim 1
Independent Claim
196 words
A feed-forward amplifying device comprising: a distortion extracting loop circuit unit including a main amplifier which amplifies a main signal in a main signal system, said main amplifier including a first transistor and a first matching circuit disposed at to at least one of the input side and the output side of said first transistor, said distortion extracting loop circuit unit generating a distortion extracted signal obtained by canceling a main signal component of an output signal from said main amplifier; and a distortion removing loop circuit unit including an auxiliary amplifier which provides a passage delay time shorter than that of said main amplifier and amplifies said distortion extracted signal from said distortion extracting loop circuit unit, said auxiliary amplifier including a second transistor with an output smaller than that of said first transistor alone and a second matching circuit arranged to at least one of the input side and the output side of said second transistor, said distortion removing loop circuit unit outputting only said main signal component from the signal in said main signal system at the rear stage of said main amplifier using said distortion extracted signal amplified by said auxiliary amplifier.
Claim 2
Dependent Claim
196 words
A feed-forward amplifying device comprising: a distortion extracting loop circuit unit including a main amplifier which amplifies a main signal in a main signal system, said main amplifier including a first transistor and a first matching circuit disposed at to at least one of the input side and the output side of said first transistor, said distortion extracting loop circuit unit generating a distortion extracted signal obtained by canceling a main signal component of an output signal from said main amplifier; and a distortion removing loop circuit unit including an auxiliary amplifier which provides a passage delay time shorter than that of said main amplifier and amplifies said distortion extracted signal from said distortion extracting loop circuit unit, said auxiliary amplifier including a second transistor with an output smaller than that of said first transistor alone and a second matching circuit arranged to at least one of the input side and the output side of said second transistor, said distortion removing loop circuit unit outputting only said main signal component from the signal in said main signal system at the rear stage of said main amplifier using said distortion extracted signal amplified by said auxiliary amplifier.
Claim 3
Dependent Claim
28 words
The feed-forward amplifying device according to claim 1, wherein said first transistor comprises a bipolar transistor or a MOSFET; and wherein said second transistor comprises a GaAs FET.
Claim 4
Dependent Claim
19 words
The feed-forward amplifying device according to claim 1, wherein said auxiliary amplifier comprises a balanced-type amplifier using a hybrid.
Claim 5
Dependent Claim
73 words
The feed-forward amplifying device according to claim 1, further comprising a first voltage converter for converting a voltage from a primary power source into a voltage suitable for said main amplifier to provide a bias power source for said main amplifier and a second voltage converter for converting a voltage from said primary power source into a voltage suitable for said auxiliary amplifier to provide a bias power source for said auxiliary amplifier.
Claim 6
Dependent Claim
98 words
The feed-forward amplifying device according to claim 1, wherein said first transistor comprises one of a bipolar transistor and a MOSFET and said second transistor comprises a GaAs FET the feed-forward amplifying device further comprising a first voltage converter for converting a voltage from a primary power source into a voltage suitable for said main amplifier to provide a bias power source for said main amplifier and a second voltage converter for converting a voltage from said primary power source into a voltage suitable for said auxiliary amplifier to provide a bias power source for said auxiliary amplifier.
Claim 7
Dependent Claim
87 words
The feed-forward amplifying device according to claim 1, wherein said auxiliary amplifier comprises a balanced-type amplifier using a hybrid, the feed-forward amplifying further comprising a first voltage converter for converting a voltage from a primary power source into a voltage suitable for said main amplifier to provide a bias power source for said main amplifier and a second voltage converter for converting a voltage from said primary power source into a voltage suitable for said auxiliary amplifier to provide a bias power source for said auxiliary amplifier.
Claim 8
Dependent Claim
65 words
The feed-forward amplifying device according to claim 1, further comprising a primary power source for supplying a voltage suitable for said main amplifier to provide a bias power supply unit for said main amplifier and a voltage converter for converting a voltage from said primary power source into a voltage suitable for said auxiliary amplifier to provide a bias power source for said auxiliary amplifier.
Claim 9
Dependent Claim
89 words
The feed-forward amplifying device according to claim 1, wherein said first transistor comprises one of a bipolar transistor and a MOSFET and said second transistor comprises a GaAs FET, the feed-forward amplifying device further comprising a primary power source for supplying a voltage suitable for said main amplifier to provide a bias power source for said main amplifier and a voltage converter for converting a voltage from said primary power source into a voltage suitable for said auxiliary amplifier to provide a bias power source for said auxiliary amplifier.
Claim 10
Dependent Claim
64 words
The feed-forward amplifying device according to claim 1, further comprising a primary power source for supplying a voltage suitable for said main amplifier to provide a bias power source for said main amplifier and a voltage converter for converting a voltage from said primary power source into a voltage suitable for said auxiliary amplifier to provide a bias power source for said auxiliary amplifier.
Claim 11
Dependent Claim
54 words
The feed-forward amplifying device according to claim 1, further comprising a main amplifier drive amplifier arranged in the front stage of said main amplifier, said main amplifier drive amplifier including a third transistor and a third matching circuit arranged to at least one of the input side and output side of said third transistor.
Claim 12
Dependent Claim
16 words
The feed-forward amplifying device according to claim 10, wherein said third transistor comprises a GaAs FET.
Claim 13
Dependent Claim
104 words
The feed-forward amplifying device according to claim 1, further comprising a main amplifier drive amplifier disposed in the front stage of said main amplifier, said main amplifier drive amplifier including a third transistor and a third matching circuit disposed at at least one of the input side and output side of said third transistor and an auxiliary amplifier drive amplifier disposed in the front stage of said auxiliary amplifier and formed of a fourth transistor of the same type as said third transistor and a fourth matching circuit disposed to at least one of the input side and output side of said fourth transistor.
Claim 14
Dependent Claim
16 words
The feed-forward amplifying device according to claim 12, wherein said fourth transistor comprises a GaAs FET.
Claim 15
Dependent Claim
35 words
The feed-forward amplifying device according to claim 12, wherein said auxiliary amplifier drive amplifier is formed as a variable gain type amplifier to correct the gain to a change in temperature of said auxiliary amplifier.
Claim 16
Dependent Claim
97 words
The feed-forward amplifying device according to claim 12, further comprising a first voltage converter for converting a voltage from a primary power source into a voltage suitable for said main amplifier and said main amplifier drive amplifier to provide a bias power source for said main amplifier and said main amplifier drive amplifier, and a second voltage converter for converting a voltage from said primary power source into a voltage suitable for said auxiliary amplifier and said auxiliary amplifier drive amplifier to provide a bias power source for said auxiliary amplifier and said auxiliary amplifier drive amplifier.
Claim 17
Dependent Claim
112 words
The feed-forward amplifying device according to claim 12, wherein said auxiliary amplifier comprises a balanced-type amplifier using a hybrid, the feed-forward amplifying device further comprising a first voltage converter for converting a voltage from a primary power source into a voltage suitable for said main amplifier and said main amplifier drive amplifier to provide a bias power source for said main amplifier and said main amplifier drive amplifier, and a second voltage converter for converting a voltage from said primary power source into a voltage suitable for said auxiliary amplifier and said auxiliary amplifier drive amplifier to provide a bias power source for said auxiliary amplifier and said auxiliary amplifier drive amplifier.
Claim 18
Dependent Claim
109 words
The feed-forward amplifying device according to claim 12, wherein said fourth transistor comprises a GaAs FET, the feed-forward amplifying device further comprising a first voltage converter for converting a voltage from a primary power source into a voltage suitable for said main amplifier and said main amplifier drive amplifier to provide a bias power source for said main amplifier and said main amplifier drive amplifier, and a second voltage converter for converting a voltage from said primary power source into a voltage suitable for said auxiliary amplifier and said auxiliary amplifier drive amplifier to provide a bias power source for said auxiliary amplifier and said auxiliary amplifier drive amplifier.
Claim 19
Dependent Claim
128 words
The feed-forward amplifying device according to claim 12, wherein said auxiliary amplifier drive amplifier is formed as a variable gain type amplifier to correct the gain to a change in temperature of said auxiliary amplifier, the feed-forward amplifying device further comprising a first voltage converter for converting a voltage from a primary power source into a voltage suitable for said main amplifier and said main amplifier drive amplifier to provide a bias power source for said main amplifier and said main amplifier drive amplifier, and a second voltage converter for converting a voltage from said primary power source into a voltage suitable for said auxiliary amplifier and said auxiliary amplifier drive amplifier to provide a bias power source for said auxiliary amplifier and said auxiliary amplifier drive amplifier.
Claim 20
Dependent Claim
95 words
The feed-forward amplifying device according to claim 12, further comprising: a first voltage converter for converting a voltage from a primary power source into a voltage suitable for said main amplifier to provide a bias power source for said main amplifier, and a second voltage converter for converting a voltage from said primary power source into a voltage suitable for said auxiliary amplifier, said main amplifier drive amplifier and said auxiliary amplifier drive amplifier to provide a bias power source for said auxiliary amplifier, said main amplifier drive amplifier and said auxiliary amplifier drive amplifier.
Claim 21
Dependent Claim
88 words
The feed-forward amplifying device according to claim 12, further comprising: a primary power source for supplying a voltage suitable for said main amplifier and said main amplifier drive amplifier to provide a bias power source for said main amplifier and said main amplifier drive amplifier; and a voltage converter for converting a voltage from said primary power source into a voltage suitable for said auxiliary amplifier and said auxiliary amplifier drive amplifier to provide a bias power source for said auxiliary amplifier and said auxiliary amplifier drive amplifier.
Claim 22
Dependent Claim
114 words
The feed-forward amplifying device according to claim 12, wherein said first transistor comprises one of a bipolar transistor and a MOSFET and wherein said second transistor comprises a GaAs FET, the feed-forward amplifying device further comprising: a primary power source for supplying a voltage suitable for said main amplifier and said main amplifier drive amplifier to provide a bias power source for said main amplifier and said main amplifier drive amplifier; and a voltage converter for converting a voltage from said primary power source into a voltage suitable for said auxiliary amplifier and said auxiliary amplifier drive amplifier to provide a bias power source for said auxiliary amplifier and said auxiliary amplifier drive amplifier.
Claim 23
Dependent Claim
103 words
The feed-forward amplifying device according to claim 12, wherein said auxiliary amplifier comprises a balanced-type amplifier using a hybrid, the feed-forward amplifying device further comprising: a primary power source for supplying a voltage suitable for said main amplifier and said main amplifier drive amplifier to provide a bias power source for said main amplifier and said main amplifier drive amplifier; and a voltage converter for converting a voltage from said primary power source into a voltage suitable for said auxiliary amplifier and said auxiliary amplifier drive amplifier to provide a bias power source for said auxiliary amplifier and said auxiliary amplifier drive amplifier.
Claim 24
Dependent Claim
100 words
The feed-forward amplifying device according to claim 12, wherein said fourth transistor comprises a GaAs FET, the feed-forward amplifying device further comprising: a primary power source for supplying a voltage suitable for said main amplifier and said main amplifier drive amplifier to provide a bias power source for said main amplifier and said main amplifier drive amplifier; and a voltage converter for converting a voltage from said primary power source into a voltage suitable for said auxiliary amplifier and said auxiliary amplifier drive amplifier to provide a bias power source for said auxiliary amplifier and said auxiliary amplifier drive amplifier.
Claim 25
Dependent Claim
119 words
The feed-forward amplifying device according to claim 12, wherein said auxiliary amplifier drive amplifier is formed as a variable gain type amplifier to correct the gain to a chance in temperature of said auxiliary amplifier, the feed-forward amplifying device further comprising: a primary power source for supplying a voltage suitable for said main amplifier and said main amplifier drive amplifier to provide a bias power source for said main amplifier and said main amplifier drive amplifier; and a voltage converter for converting a voltage from said primary power source into a voltage suitable for said auxiliary amplifier and said auxiliary amplifier drive amplifier to provide a bias power source for said auxiliary amplifier and said auxiliary amplifier drive amplifier.
Claim 26
Dependent Claim
86 words
The feed-forward amplifying device according to claim 12, further comprising: a primary power source for supplying a voltage suitable for said main amplifier to provide a bias power source for said main amplifier; and a voltage converter for converting a voltage from said primary power source into a voltage suitable for said auxiliary amplifier, said main amplifier drive amplifier and said auxiliary amplifier drive amplifier to provide a bias power source for said auxiliary amplifier, said main amplifier drive amplifier and said auxiliary amplifier drive amplifier.
Claim 27
Dependent Claim
203 words
The feed-forward amplifying device according to claim 1, wherein said auxiliary amplifier comprises a balanced-type amplifier using a hybrid, the feed-forward amplifying device further comprising: a main amplifier drive amplifier disposed in the front stage of said main amplifier, said main amplifier drive amplifier including a third transistor and a third matching circuit disposed at at least one of the input side and output side of said third transistor; an auxiliary amplifier drive amplifier disposed in the front stage of said auxiliary amplifier and formed of a fourth transistor of the same type as said third transistor and a fourth matching circuit disposed at at least one of the input side and output side of said fourth transistor; a first voltage converter for converting a voltage from a primary power source into a voltage suitable for said main amplifier to provide a bias power source for said main amplifier, and a second voltage converter for converting a voltage from said primary power source into a voltage suitable for said auxiliary amplifier, said main amplifier drive amplifier and said auxiliary amplifier drive amplifier to provide a bias power source for said auxiliary amplifier, said main amplifier drive amplifier and said auxiliary amplifier drive amplifier.
Claim 28
Dependent Claim
194 words
The feed-forward amplifying device according to claim 1, wherein said auxiliary amplifier comprises a balanced-type amplifier using a hybrid, the feed-forward amplifying device further comprising: a main amplifier drive amplifier disposed in the front stage of said main amplifier, said main amplifier drive amplifier including a third transistor and a third matching circuit disposed at at least one of the input side and output side of said third transistor; an auxiliary amplifier drive amplifier disposed in the front stage of said auxiliary amplifier and formed of a fourth transistor of the same type as said third transistor and a fourth matching circuit disposed at at least one of the input side and output side of said fourth transistor; a primary power source for supplying a voltage suitable for said main amplifier to provide a bias power source for said main amplifier; and a voltage converter for converting a voltage from said primary power source into a voltage suitable for said auxiliary amplifier, said main amplifier drive amplifier and said auxiliary amplifier drive amplifier to provide a bias power source for said auxiliary amplifier, said main amplifier drive amplifier and said auxiliary amplifier drive amplifier.
Claim 29
Dependent Claim
252 words
A feed-forward amplifying device comprising: a distortion extracting loop circuit unit unit including: a branching unit for branching a main signal in a main signal system, a main amplifier for amplifying the main signal branched by said branching unit, said main amplifier formed of a first transistor and a first matching circuit disposed of to at least one of the input side and output side of said first transistor, a first delaying unit for delaying the other main signal branched in said branching unit to different side from said main amplifier side, and a distortion extracted signal outputting unit for synthesizing a signal from said first delaying unit with a signal from said main amplifier and then outputting the result as a distortion extracted signal; and a distortion removing loop circuit unit including: a second delaying unit for delaying the signal amplified by said main amplifier, an auxiliary amplifier, with a passage delay time shorter than that of said main amplifier, for amplifying the distortion extracted signal from said distortion extracted signal outputting unit, said auxiliary amplifier including a second transistor with an output smaller than that of said first transistor alone and a second matching circuit arranged to at least one of the input side and the output side of said second transistor, and a distortion component removing unit for synthesizing a signal from said auxiliary amplifier with a signal from said second delaying unit and then outputting the result as a main signal of which a distortion component is removed.
Claim 30
Dependent Claim
252 words
A feed-forward amplifying device comprising: a distortion extracting loop circuit unit unit including: a branching unit for branching a main signal in a main signal system, a main amplifier for amplifying the main signal branched by said branching unit, said main amplifier formed of a first transistor and a first matching circuit disposed of to at least one of the input side and output side of said first transistor, a first delaying unit for delaying the other main signal branched in said branching unit to different side from said main amplifier side, and a distortion extracted signal outputting unit for synthesizing a signal from said first delaying unit with a signal from said main amplifier and then outputting the result as a distortion extracted signal; and a distortion removing loop circuit unit including: a second delaying unit for delaying the signal amplified by said main amplifier, an auxiliary amplifier, with a passage delay time shorter than that of said main amplifier, for amplifying the distortion extracted signal from said distortion extracted signal outputting unit, said auxiliary amplifier including a second transistor with an output smaller than that of said first transistor alone and a second matching circuit arranged to at least one of the input side and the output side of said second transistor, and a distortion component removing unit for synthesizing a signal from said auxiliary amplifier with a signal from said second delaying unit and then outputting the result as a main signal of which a distortion component is removed.
Claim 31
Dependent Claim
28 words
The feed-forward amplifying device according to claim 28, wherein said first transistor comprises a bipolar transistor or a MOSFET; and wherein said second transistor comprises a GaAs FET.
Claim 32
Dependent Claim
19 words
The feed-forward amplifying device according to claim 28, wherein said auxiliary amplifier comprises a balanced-type amplifier using a hybrid.
Claim 33
Dependent Claim
74 words
The feed-forward amplifying device according to claim 28, further comprising a first voltage converter for converting a voltage from a primary power source into a voltage suitable for said main amplifier to provide a bias power supply unit for said main amplifier and a second voltage converter for converting a voltage from said primary power source into a voltage suitable for said auxiliary amplifier to provide a bias power source for said auxiliary amplifier.
Claim 34
Dependent Claim
99 words
The feed-forward amplifying device according to claim 28, wherein said first transistor comprises one of a bipolar transistor and a MOSFET and said second transistor comprises a GaAs FET, the feed forward amplifying device further comprising a first voltage converter for converting a voltage from a primary power source into a voltage suitable for said main amplifier to provide a bias power source for said main amplifier and a second voltage converter for converting a voltage from said primary power source into a voltage suitable for said auxiliary amplifier to provide a bias power source for said auxiliary amplifier.
Claim 35
Dependent Claim
88 words
The feed-forward amplifying device according to claim 28, wherein said auxiliary amplifier comprises a balanced-type amplifier using a hybrid, the feed-forward amplifying device further comprising a first voltage converter for converting a voltage from a primary power source into a voltage suitable for said main amplifier to provide a bias power source for said main amplifier and a second voltage converter for converting a voltage from said primary power source into a voltage suitable for said auxiliary amplifier to provide a bias power source for said auxiliary amplifier.
Claim 36
Dependent Claim
64 words
The feed-forward amplifying device according to claim 28, further comprising a primary power source for supplying a voltage suitable for said main amplifier to provide a bias power source for said main amplifier and a voltage converter for converting a voltage from said primary power source into a voltage suitable for said auxiliary amplifier to provide a bias power source for said auxiliary amplifier.
Claim 37
Dependent Claim
89 words
The feed-forward amplifying device according to claim 28, wherein said first transistor comprises one of a bipolar transistor or a MOSFET and said second transistor comprises a GaAs FET, the feed-forward amplifying device further comprising a primary power source for supplying a voltage suitable for said main amplifier to provide a bias power source for said main amplifier and a voltage converter for converting a voltage from said primary power source into a voltage suitable for said auxiliary amplifier to provide a bias power source for aid auxiliary amplifier.
Claim 38
Dependent Claim
79 words
The feed-forward amplifying device according to claim 28, wherein said auxiliary amplifier comprises a balanced-type amplifier using a hybrid, the feed-forward amplifying device further comprising a primary power source for supplying a voltage suitable for said main amplifier to provide a bias power source for said main amplifier and a voltage converter for converting a voltage from said primary power source into a voltage suitable for said auxiliary amplifier to provide a bias power source for said auxiliary amplifier.
Claim 39
Dependent Claim
54 words
The feed-forward amplifying device according to claim 28, further comprising a main amplifier drive amplifier arranged in the front stage of said main amplifier, said main amplifier drive amplifier including a third transistor and a third matching circuit arranged to at least one of the input side and output side of said third transistor.
Claim 40
Dependent Claim
16 words
The feed-forward amplifying device according to claim 37, wherein said third transistor comprises a GaAs FET.
Claim 41
Dependent Claim
104 words
The feed-forward amplifying device according to claim 28, further comprising a main amplifier drive amplifier disposed in the front stage of said main amplifier, said main amplifier drive amplifier including a third transistor and a third matching circuit disposed at at least one of the input side and output side of said third transistor and an auxiliary amplifier drive amplifier disposed in the front stage of said auxiliary amplifier and formed of a fourth transistor of the same type as said third transistor and a fourth matching circuit disposed at at least one of the input side and output side of said fourth transistor.
Claim 42
Dependent Claim
16 words
The feed-forward amplifying device according to claim 39, wherein said fourth transistor comprises a GaAs FET.
Claim 43
Dependent Claim
35 words
The feed-forward amplifying device according to claim 39, wherein said auxiliary amplifier drive amplifier is formed as a variable gain type amplifier to correct the gain to a change in temperature of said auxiliary amplifier.
Claim 44
Dependent Claim
97 words
The feed-forward amplifying device according to claim 39, further comprising a first voltage converter for converting a voltage from a primary power source into a voltage suitable for said main amplifier and said main amplifier drive amplifier to provide a bias power source for said main amplifier and said main amplifier drive amplifier, and a second voltage converter for converting a voltage from said primary power source into a voltage suitable for said auxiliary amplifier and said auxiliary amplifier drive amplifier to provide a bias power source for said auxiliary amplifier and said auxiliary amplifier drive amplifier.
Claim 45
Dependent Claim
122 words
The feed-forward amplifying device according to claim 39, wherein said first transistor comprises one of a bipolar transistor and a MOSFET and said second transistor comprises a GaAs FET, the feed-forward amplifying device further comprising a first voltage converter for converting a voltage from a primary power source into a voltage suitable for said main amplifier and said main amplifier drive amplifier to provide a bias power source for said main amplifier and said main amplifier drive amplifier, and a second voltage converter for converting a voltage from said primary power source into a voltage suitable for said auxiliary amplifier and said auxiliary amplifier drive amplifier to provide a bias power source for said auxiliary amplifier and said auxiliary amplifier drive amplifier.
Claim 46
Dependent Claim
102 words
The feed-forward amplifying device according to claim 39, wherein said auxiliary amplifier comprises a balanced-type amplifier using a hybrid, the feed-forward amplifying device further comprising a first voltage converter for converting a voltage from a primary power source into a voltage suitable for said main amplifier and said main amplifier drive amplifier to provide a bias power source for said main amplifier and said main amplifier drive amplifier, and a second voltage converter for converting a voltage from said primary power source into a voltage suitable for said auxiliary amplifier and said auxiliary amplifier drive amplifier and said auxiliary amplifier drive amplifier.
Claim 47
Dependent Claim
110 words
The feed-forward amplifying device according to claim 39, wherein said fourth transistor comprises a GaAs FET, the feed-forward amplifying device further comprising a first voltage converter for converting a voltage from a primary power source into a voltage suitable for said main amplifier and said main amplifier drive amplifier to provide a bias power supply unit for said main amplifier and said main amplifier drive amplifier, and a second voltage converter for converting a voltage from aid primary power source into a voltage suitable for said auxiliary amplifier and said auxiliary amplifier drive amplifier to provide a bias power source for said auxiliary amplifier and said auxiliary amplifier drive amplifier.
Claim 48
Dependent Claim
128 words
The feed-forward amplifying device according to claim 39, wherein said auxiliary amplifier drive amplifier is formed as a variable gain type amplifier to correct the gain to a change in temperature of said auxiliary amplifier, the feed-forward amplifying device further comprising a first voltage converter for converting a voltage from a primary power source into a voltage suitable for said main amplifier and said main amplifier drive amplifier to provide a bias power source for said main amplifier and said main amplifier drive amplifier, and a second voltage converter for converting a voltage from said primary power source into a voltage suitable for said auxiliary amplifier and said auxiliary amplifier drive amplifier to provide a bias power source for said auxiliary amplifier and said auxiliary amplifier drive amplifier.
Claim 49
Dependent Claim
95 words
The feed-forward amplifying device according to claim 39, further comprising: a first voltage converter for converting a voltage from a primary power source into a voltage suitable for said main amplifier to provide a bias power source for said main amplifier, and a second voltage converter for converting a voltage from said primary power source into a voltage suitable for said auxiliary amplifier, said main amplifier drive amplifier and said auxiliary amplifier drive amplifier to provide a bias power source for said auxiliary amplifier, said main amplifier drive amplifier and said auxiliary amplifier drive amplifier.
Claim 50
Dependent Claim
88 words
The feed-forward amplifying device according to claim 39, further comprising: a primary power source for supplying a voltage suitable for said main amplifier and said main amplifier drive amplifier to provide a bias power source for said main amplifier and said main amplifier drive amplifier; and a voltage converter for converting a voltage from said primary power source into a voltage suitable for said auxiliary amplifier and said auxiliary amplifier drive amplifier to provide a bias power source for said auxiliary amplifier and said auxiliary amplifier drive amplifier.
Claim 51
Dependent Claim
113 words
The feed-forward amplifying device according to claim 39, wherein said first transistor comprises one of a bipolar transistor and a MOSFET and said second transistor comprises a GaAs FET, the feed-forward amplifying device further comprising: a primary power source for supplying a voltage suitable for said main amplifier and said main amplifier drive amplifier to provide a bias power source for said main amplifier and said main amplifier drive amplifier; and a voltage converter for converting a voltage from said primary power source into a voltage suitable for said auxiliary amplifier and said auxiliary amplifier drive amplifier to provide a bias power source for said auxiliary amplifier and said auxiliary amplifier drive amplifier.
Claim 52
Dependent Claim
103 words
The feed-forward amplifying device according to claim 39, wherein said auxiliary amplifier comprises a balanced-type amplifier using a hybrid, the feed-forward amplifying devices further comprising: a primary power source for supplying a voltage suitable for said main amplifier and said main amplifier drive amplifier to provide a bias power source for said main amplifier and said main amplifier drive amplifier; and a voltage converter for converting a voltage from said primary power source into a voltage suitable for said auxiliary amplifier and said auxiliary amplifier drive amplifier to provide a bias power source for said auxiliary amplifier and said auxiliary amplifier drive amplifier.
Claim 53
Dependent Claim
100 words
The feed-forward amplifying device according to claim 39, wherein said fourth transistor comprises a GaAs FET, the feed-forward amplifying device further comprising: a primary power source for supplying a voltage suitable for said main amplifier and said main amplifier drive amplifier to provide a bias power source for said main amplifier and said main amplifier drive amplifier; and a voltage converter for converting a voltage from said primary power source into a voltage suitable for said auxiliary amplifier and said auxiliary amplifier drive amplifier to provide a bias power source for said auxiliary amplifier and said auxiliary amplifier drive amplifier.
Claim 54
Dependent Claim
119 words
The feed-forward amplifying device according to claim 39, wherein said auxiliary amplifier drive amplifier is formed as a variable gain type amplifier to correct the gain to a change in temperature of said auxiliary amplifier, the feed-forward amplifying device further comprising: a primary power source for supplying a voltage suitable for said main amplifier and said main amplifier drive amplifier to provide a bias power source for said main amplifier and said main amplifier drive amplifier; and a voltage converter for converting a voltage from said primary power source into a voltage suitable for said auxiliary amplifier and said auxiliary amplifier drive amplifier to provide a bias power source for said auxiliary amplifier and said auxiliary amplifier drive amplifier.
Claim 55
Dependent Claim
86 words
The feed-forward amplifying device according to claim 39, further comprising: a primary power source for supplying a voltage suitable for said main amplifier to provide a bias power source for said main amplifier; and a voltage converter for converting a voltage from said primary power source into a voltage suitable for said auxiliary amplifier, said main amplifier drive amplifier and said auxiliary amplifier drive amplifier to provide a bias power source for said auxiliary amplifier, said main amplifier drive amplifier and said auxiliary amplifier drive amplifier.
Claim 56
Dependent Claim
203 words
The feed-forward amplifying device according to claim 28, wherein said auxiliary amplifier comprises a balanced-type amplifier using a hybrid, the feed-forward amplifying device, further comprising: a main amplifier drive amplifier disposed in the front stage of said main amplifier, said main amplifier drive amplifier including a third transistor and a third matching circuit disposed at at least one of the input side and output side of said third transistor; an auxiliary amplifier drive amplifier disposed in the front stage of said auxiliary amplifier and formed of a fourth transistor of the same type as said third transistor and a fourth matching circuit disposed at at least one of the input side and output side of said fourth transistor; a first voltage converter for converting a voltage from a primary power source into a voltage suitable for said main amplifier to provide a bias power source for said main amplifier, and a second voltage converter for converting a voltage from said primary power source into a voltage suitable for said auxiliary amplifier, said main amplifier drive amplifier and said auxiliary amplifier drive amplifier to provide a bias power source for said auxiliary amplifier, said main amplifier drive amplifier and said auxiliary amplifier drive amplifier.
Claim 57
Dependent Claim
194 words
The feed-forward amplifying device according to claim 28, wherein said auxiliary amplifier comprises a balanced-type amplifier using a hybrid, the feed-forward amplifying device further comprising: an auxiliary amplifier drive amplifier disposed in the front stage of said auxiliary amplifier and formed of a fourth transistor of the same type as said third transistor and a fourth matching circuit disposed at at least one of the input side and output side of said fourth transistor; a main amplifier drive amplifier disposed in the front stage of said main amplifier, said main amplifier drive amplifier including a third transistor and a third matching circuit disposed at at least one of the input side and output side of said third transistor; a primary power source for supplying a voltage suitable for said main amplifier to provide a bias power source for said main amplifier; and a voltage converter for converting a voltage from said primary power source into a voltage suitable for said auxiliary amplifier, said main amplifier drive amplifier and said auxiliary amplifier drive amplifier to provide a bias power source for said auxiliary amplifier, said main amplifier drive amplifier and said auxiliary amplifier drive amplifier.
Claim 58
Dependent Claim
233 words
A base station with a feed-forward amplifying device, said base station accommodating plural mobile stations, comprising: a transmitting unit for amplifying and transmitting in common a signal including plural frequency components selected for each mobile station, in a frequency band used for transmitting signals to said mobile stations; said transmitting unit including: a distortion extracting loop circuit unit including a main amplifier which amplifies a main signal in a main signal system, said main amplifier including a first transistor and a first matching circuit disposed at at least one of the input side and the output side of said first transistor, said distortion extracted signal obtained by canceling a main signal component of an output from said main amplifier; and a distortion removing loop circuit unit including an auxiliary amplifier, with a passage delay time shorter than that of said main amplifier, which amplifies the distortion extracted signal from said distortion extracting loop circuit unit, said auxiliary amplifier including a second transistor which provides an output smaller than that of said first transistor and a second matching circuit disposed at at least one of the input side and the output side of said second transistor, said distortion removing loop circuit unit outputting only said main signal component from a signal in said main signal system at the rear stage of said main amplifier using the distortion extracted signal amplified by said auxiliary amplifier.
Claim 59
Dependent Claim
233 words
A base station with a feed-forward amplifying device, said base station accommodating plural mobile stations, comprising: a transmitting unit for amplifying and transmitting in common a signal including plural frequency components selected for each mobile station, in a frequency band used for transmitting signals to said mobile stations; said transmitting unit including: a distortion extracting loop circuit unit including a main amplifier which amplifies a main signal in a main signal system, said main amplifier including a first transistor and a first matching circuit disposed at at least one of the input side and the output side of said first transistor, said distortion extracted signal obtained by canceling a main signal component of an output from said main amplifier; and a distortion removing loop circuit unit including an auxiliary amplifier, with a passage delay time shorter than that of said main amplifier, which amplifies the distortion extracted signal from said distortion extracting loop circuit unit, said auxiliary amplifier including a second transistor which provides an output smaller than that of said first transistor and a second matching circuit disposed at at least one of the input side and the output side of said second transistor, said distortion removing loop circuit unit outputting only said main signal component from a signal in said main signal system at the rear stage of said main amplifier using the distortion extracted signal amplified by said auxiliary amplifier.
References Cited (Backward Citations)
US4617522A
Cited
US5065110A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-05-25 | 2001-11-24 | 2002-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-05-25 | 2005-11-24 | 2006-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-05-25 | 2009-11-24 | 2010-05-26 | $7700.00 | Window Closed / Lapsed |