US6549076B2
Expired / Lapsed
US
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High-output amplifier
Assignee: Toshiba Corp
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Filing: 2001-09-24
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Granted: 2003-04-15
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Expires: 2021-09-24
Abstract
Abstract A high-output amplifier (1), having a high gain, (2) having a high efficiency, (3) less affected by temperature changes, (4) operative linearly in output levels over a wide dynamic range and (5) using a control voltage, comprises a transistor amplifier, and a bias circuit having first and second bias circuits. A first transistor provided in the first bias circuit has a first terminal and a control terminal that are short-circuited and connected to a control source as a first high-voltage-side source and to a control circuit of the transistor amplifier, and a second terminal connected to a low-voltage-side source. A second transistor provided in the second bias circuit has a control terminal connected to the control source, a first terminal connected to the second high-voltage-side source, and a second terminal connected to the control terminal of the transistor amplifier.
Inventors
- 👤 Yasuhiko Kuriyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:38
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/30; H03F1/302
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
153 words
A high-output amplifier, comprising: a bias circuit having a first bias circuit and a second bias circuit, said first bias circuit including a first transistor having one end connected to a first high-voltage-side source and the other end connected to a low-voltage-side source, said one end being connected to the control terminal of the first transistor, said second bias circuit including a second transistor having one end connected to a second high-voltage-side source, the other end connected to said one end of said first transistor, and a control terminal connected to said first high-voltage-side source; and a transistor amplifier having a control terminal connected to said one end of said first transistor, one end as an output terminal of said high-output amplifier, and the other end connected to the low-voltage-side source, wherein said one end of said first transistor is connected to a control terminal of said transistor amplifier via an LC component.
Claim 2
Dependent Claim
153 words
A high-output amplifier, comprising: a bias circuit having a first bias circuit and a second bias circuit, said first bias circuit including a first transistor having one end connected to a first high-voltage-side source and the other end connected to a low-voltage-side source, said one end being connected to the control terminal of the first transistor, said second bias circuit including a second transistor having one end connected to a second high-voltage-side source, the other end connected to said one end of said first transistor, and a control terminal connected to said first high-voltage-side source; and a transistor amplifier having a control terminal connected to said one end of said first transistor, one end as an output terminal of said high-output amplifier, and the other end connected to the low-voltage-side source, wherein said one end of said first transistor is connected to a control terminal of said transistor amplifier via an LC component.
Claim 3
Dependent Claim
44 words
An amplifier according to claim 1 wherein a first resistor is connected between said control terminal of said first transistor and said first high-voltage-side source, and said control terminal of said second transistor is connected via a second resistor to said first high-voltage-side source.
Claim 4
Dependent Claim
24 words
An amplifier according to claim 2 wherein a resistor RR is connected between said control terminal and said one end of said first transistor.
Claim 5
Dependent Claim
21 words
An amplifier according to claim 1 wherein said transistor amplifier, said first transistor and said second transistor are compound bipolar transistors.
Claim 6
Dependent Claim
45 words
An amplifier according to claim 1 wherein matching circuits are connected, respectively, between an input end of said high-output amplifier and a control terminal of said transistor amplifier, and between said one end of said transistor amplifier and said output terminal of said high-output amplifier.
Claim 7
Dependent Claim
25 words
An amplifier according to claim 1 wherein said one end of said transistor amplifier is connected to a third high-voltage-side source through an LC component.
Claim 8
Dependent Claim
27 words
An amplifier according to claim 6 wherein said first transistor and said transistor amplifier have emitters grounded, and said second transistor is configured as an emitter follower.
Claim 9
Dependent Claim
24 words
An amplifier according to claim 1 wherein said control terminal of said second transistor is grounded to the low-voltage-side source via a resistor component.
Claim 10
Dependent Claim
13 words
An amplifier according to claim 8 wherein said resistor component is diode-coupled transistors.
Claim 11
Dependent Claim
26 words
An amplifier according to claim 8 wherein said resistor component is a transistor having a control terminal connected to said one end of said first transistor.
Claim 12
Dependent Claim
20 words
An amplifier according to claim 1 wherein the control terminal of said transistor amplifier is connected to a preamplifying transistor.
Claim 13
Dependent Claim
33 words
An amplifier according to claim 11 wherein said preamplifying transistor has a control terminal to which one end of a third transistor connected between a high-voltage-side source and a low-voltage-side source is connected.
Claim 14
Dependent Claim
14 words
An amplifier according to claim 12 wherein said third transistor is in diode connection.
Claim 15
Dependent Claim
22 words
An amplifier according to claim 12 wherein said third transistor is connected between said high-voltage-side source and said low-voltage-side source via resistors.
Claim 16
Dependent Claim
14 words
An amplifier according to claim 1 wherein said second transistor is a MOS transistor.
Claim 17
Dependent Claim
31 words
An amplifier according to claim 1 wherein said first high-voltage-side source is not larger than twice as large as a base/emitter ON voltage of said first transistor which is bipolar transistor.
References Cited (Backward Citations)
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