US4882547A
Expired / Lapsed
US
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Linearizer control system
Assignee: Lockheed Martin Corp
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Filing: 1988-11-15
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Granted: 1989-11-21
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Expires: 2008-11-15
Abstract
Abstract An active or translating device having distortion is associated with a controllable predistortion circuit or linearizer. A filter sampler arrangement samples the desired fundamental-frequency signal and its second harmonic. A control circuit forms the ratio of the amplitude of the second harmonic divided by the amplitude of the fundamental-frequency signal, and controls the linearizer to minimize the ratio.
Inventors
- 👤 Allen Katz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:39
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/32; H03F1/3241; H03F1/3247; H03F1/34; H03F3/00; H03F3/20; H03F3/24; H04; H04B; H04B1/00; H04B1/02; H04B1/04; H04B2001/0408; H04B2001/0433
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
216 words
An active device arrangement, comprising: active signal translating means including input and output ports, said translating means being adapted to receive signals at said input port for translating said signals applied to said input port for producing translated signals at said output port, the process of translation being accompanied by distortion; controllable linearizer means coupled to at least one port of said signal translating means for controllably distorting signals applied thereto; first filter means coupled at least to said output port of said signal translating means, said first filter means being tuned to pass the frequencies of said signal which said signal translating means is adapted to receive at said input port and to reject a particular harmonic thereof for producing first filtered signals; second filter means coupled at least to said output port of said signal translating means, said second filter means being tuned to pass at least said particular harmonic for thereby producing second filtered signals; signal processing means coupled to said first and second filtering means for forming a processed signal representative of the ratio of said first and second filtered signals; and control means coupled to said signal processing means and to said controllable linearizer means for adjusting said controllable linearizer means in a manner which tends to minimize said processed signal.
Claim 2
Dependent Claim
216 words
An active device arrangement, comprising: active signal translating means including input and output ports, said translating means being adapted to receive signals at said input port for translating said signals applied to said input port for producing translated signals at said output port, the process of translation being accompanied by distortion; controllable linearizer means coupled to at least one port of said signal translating means for controllably distorting signals applied thereto; first filter means coupled at least to said output port of said signal translating means, said first filter means being tuned to pass the frequencies of said signal which said signal translating means is adapted to receive at said input port and to reject a particular harmonic thereof for producing first filtered signals; second filter means coupled at least to said output port of said signal translating means, said second filter means being tuned to pass at least said particular harmonic for thereby producing second filtered signals; signal processing means coupled to said first and second filtering means for forming a processed signal representative of the ratio of said first and second filtered signals; and control means coupled to said signal processing means and to said controllable linearizer means for adjusting said controllable linearizer means in a manner which tends to minimize said processed signal.
Claim 3
Dependent Claim
13 words
An arrangement according to claim 1 wherein said harmonic is a second harmonic.
Claim 4
Dependent Claim
35 words
An arrangement according to claim 1 wherein said controllable linearizer means is coupled to said input port of said signal translating means for predistorting signals applied to said input port of said signal translating means.
Claim 5
Dependent Claim
63 words
An arrangement according to claim 1, wherein said first filter means is tuned to pass a first predetermined frequency band extending from a first frequency to a higher second frequency, and said second filter means is tuned to pass a second predetermined frequency band extending from a third frequency to a higher fourth frequency, said third frequency being higher than said second frequency.
Claim 6
Dependent Claim
16 words
An arrangement according to claim 4 wherein said fourth frequency is substantially twice said second frequency.
Claim 7
Dependent Claim
16 words
An arrangement according to claim 5 wherein said third frequency is substantially twice said first frequency.
Claim 8
Dependent Claim
43 words
An arrangement according to claim 1 wherein said signal processing means comprises first and second detecting means coupled to said first and second filter means, respectively, for independently detecting said first and second filtered signals to produce first and second detected signals, respectively.
Claim 9
Dependent Claim
20 words
An arrangement according to claim 7 wherein each of said first and second detecting means comprises an independent diode detector.
Claim 10
Dependent Claim
32 words
An arrangement according to claim 7 wherein said first detecting means comprises a detector and a first integrating means; and said second detecting means comprises said detector and a second integrating means.
Claim 11
Dependent Claim
69 words
An arrangement according to claim 9 further comprising synchronous switching means coupled to said first and second filter means, to said detector and to said first and second integrating means, for alternately coupling said first and second filtered signals to said detector for alternately producing first and second rectified signals, respectively, and for coupling said first and second rectified signals alternately to said first and second integrating means, respectively.
Claim 12
Dependent Claim
36 words
An arrangement according to claim 7 wherein said signal processing means comprises first and second analog-to-digital conversion means coupled to said first and second detecting means, respectively, for forming first and second digital detected signals, respectively.
Claim 13
Dependent Claim
50 words
An arrangement according to claim 11 wherein said first and second analog-to-digital conversion means are independent, and further comprising logic means coupled for receiving said first and second digital detected signals for forming a ratio signal representative of said second digital detected signal divided by said first digital detected signal.
Claim 14
Dependent Claim
34 words
An arrangement according to claim 11 wherein said first analog-to-digital conversion means comprises an analog-to-digital converter and a first register, and said second analog-to-digital conversion means comprises said analog-to-digital converter and a second register.
Claim 15
Dependent Claim
64 words
An arrangement according to claim 13 further comprising switchable routing means coupled to said first and second detecting means, to said analog-to-digital converter and to said first and second registers, for alternately applying said first and second detected signals to said analog-to-digital converter, and for coupling said first and second digital detected signals from said analog-to-digital converter to said first and second registers, respectively.
Claim 16
Independent Claim
150 words
A method for translating signals, comprising: applying signals, which signals lie within a first frequency range to be translated, to an active signal translator, said translator tending to introduce distortion, for generating translated signals; coupling said signals to be translated to controllable linearity correction means; selecting those of said translated signals lying within a predetermined first frequency band lying in said first frequency range in order to produce first filtered signals; selecting said translated signals lying within a predetermined second frequency band, to produce second filtered signals, said second frequency band including at least one frequency which is a selected harmonic of a frequency lying in said first frequency band; generating a ratio signal which represents the ratio of the amplitudes of said second filtered signals and said first filtered signals; controlling said controllable linearity correction means in response to said ratio signal for tending to minimize said ratio signal.
Claim 17
Independent Claim
150 words
A method for translating signals, comprising: applying signals, which signals lie within a first frequency range to be translated, to an active signal translator, said translator tending to introduce distortion, for generating translated signals; coupling said signals to be translated to controllable linearity correction means; selecting those of said translated signals lying within a predetermined first frequency band lying in said first frequency range in order to produce first filtered signals; selecting said translated signals lying within a predetermined second frequency band, to produce second filtered signals, said second frequency band including at least one frequency which is a selected harmonic of a frequency lying in said first frequency band; generating a ratio signal which represents the ratio of the amplitudes of said second filtered signals and said first filtered signals; controlling said controllable linearity correction means in response to said ratio signal for tending to minimize said ratio signal.
Claim 18
Dependent Claim
19 words
A method according to claim 15 wherein said step of selecting said translated signals comprises selecting the second harmonic.
Claim 19
Dependent Claim
61 words
A method according to claim 15 wherein said generating step comprises the further steps of detection of said first and second filtered signals to produce first and second detected signals, respectively; integration of said first and second detected signals to produce first and second integrated signals, respectively; and division of one of said first and second integrated signals by the other.
Claim 20
Dependent Claim
62 words
A method according to claim 17 wherein said step of division further comprises the steps of: converting said first integrated signal from analog to digital form to produce first digital signal; converting said second integrated signal from analog to digital form to produce second digital signal; and dividing said second digital signal by said first digital signal to produce said ratio signal.
References Cited (Backward Citations)
US3185887A
Cited
US3434056A
Cited
US3889229A
Cited
US4039965A
Cited
US4329655A
Cited
US4317083A
Cited
US4238855A
Cited
US4536846A
Cited
US4604589A
Cited
US4531098A
Cited
US4560945A
Cited
US4588958A
Cited
US4701717A
Cited
US4639938A
Cited
US4669091A
Cited
US4675618A
Cited
US4736391A
Cited
US4737733A
Cited
US4772855A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-20 | 1993-05-22 | 1993-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-20 | 1997-05-22 | 1997-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-20 | 2001-05-22 | 2001-11-21 | $7700.00 | Window Closed / Lapsed |