US4590434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High dynamic range amplifier with low noise and low distortion
Assignee: ECM DEVICES Inc
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Filing: 1983-05-06
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Granted: 1986-05-20
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Expires: 2003-05-06
Abstract
Abstract An amplifier uses non-dissipative elements to provide current and voltage feedback. The base amplifier has two input terminals, and the current and voltage feedback signals are applied to respective input terminals. The non-dissipative elements may be either transformers or coupled-line pairs. These elements allow broad band operation with low noise. The feedback configuration results in higher input impedence.
Inventors
- 👤 Walter D. Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:29
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/56; H03F1/565; H03F1/34; H03F1/347; H03F1/42; H03F1/48
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
77 words
Apparatus for amplification of an input signal comprising a three-terminal amplifier having first and second input terminals and an output terminal, first feedback means comprising a first non-dissipative means connected to said output terminal and to said first input terminal for providing current feedback, second feedback means comprising a second non-dissipative means connected to said output terminal and to said second input terminal of said amplifier to provide a voltage feedback in series with an input signal.
Claim 2
Dependent Claim
77 words
Apparatus for amplification of an input signal comprising a three-terminal amplifier having first and second input terminals and an output terminal, first feedback means comprising a first non-dissipative means connected to said output terminal and to said first input terminal for providing current feedback, second feedback means comprising a second non-dissipative means connected to said output terminal and to said second input terminal of said amplifier to provide a voltage feedback in series with an input signal.
Claim 3
Dependent Claim
18 words
The apparatus of claim 1 wherein said first and second feedback means are first and second transformers respectively.
Claim 4
Dependent Claim
23 words
The apparatus of claim 2 wherein primary windings of said first and second transformers are connected to said output terminal of said amplifier.
Claim 5
Dependent Claim
44 words
The apparatus of claim 2 wherein a primary winding of said first transformer is connected to said output terminal, and the primary winding of said second transformer is connected to primary terminal of said winding of said first transformer remote from said output terminal.
Claim 6
Dependent Claim
12 words
The apparatus of claim 3 wherein said amplifier is an inverting amplifier.
Claim 7
Dependent Claim
12 words
The apparatus of claim 3 wherein said amplifier is a non-inverting amplifier.
Claim 8
Dependent Claim
12 words
The apparatus of claim 4 wherein said amplifier is an inverting amplifier.
Claim 9
Dependent Claim
12 words
The apparatus of claim 4 wherein said amplifier is a non-inverting amplifier.
Claim 10
Dependent Claim
32 words
The apparatus of claim 1 wherein said amplifier is a transistor, said first input terminal is the base of said transistor, and said second input terminal is the emitter of said transistor.
Claim 11
Dependent Claim
18 words
The apparatus of claim 1 wherein each of said first and second non-dissipative means is a coupled-line pair.
Claim 12
Dependent Claim
111 words
An amplifier comprising: a first transistor, a second transistor the collector of said first transistor being connected to the base of said second transistor, a first conductor of a first coupled line pair being connected to the emitter of said second transistor and a second conductor of said first coupled line pair connected to the base of said first transistor to provide a distributed coupling current feedback, and, a first conductor of a second coupled line pair connected to the collector of said second transistor and a second conductor of said second coupled line pair being connected to the emitter of said first transistor to provide a distributed coupling voltage feedback.
Claim 13
Dependent Claim
111 words
An amplifier comprising: a first transistor, a second transistor the collector of said first transistor being connected to the base of said second transistor, a first conductor of a first coupled line pair being connected to the emitter of said second transistor and a second conductor of said first coupled line pair connected to the base of said first transistor to provide a distributed coupling current feedback, and, a first conductor of a second coupled line pair connected to the collector of said second transistor and a second conductor of said second coupled line pair being connected to the emitter of said first transistor to provide a distributed coupling voltage feedback.
Claim 14
Dependent Claim
41 words
The amplifier of claim 11 including a coupling transistor, the collector of said coupling transistor being connected to said base of said first transistor, said second conductor of said first coupled-line pair being connected to the emitter of said third transistor.
Claim 15
Dependent Claim
16 words
Apparatus according to claim 1 wherein said current feedback is in shunt with said input signal.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-05-19 | 1989-11-18 | 1990-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-19 | 1993-11-18 | 1994-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-19 | 1997-11-18 | 1998-05-20 | $7700.00 | Window Closed / Lapsed |