US3863169A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite transistor circuit
Assignee: RCA Licensing Corp
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Filing: 1974-01-18
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Granted: 1975-01-28
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Expires: 1994-01-18
Abstract
Abstract A circuit exhibiting the characteristics of a transistor suited for use in a quasi-complementary push-pull amplifier uses input and output transistors of the same conductivity type. The ''''base'''' electrode of the composite transistor is at the emitter electrode of the input transistor, operated as a common-base amplifier. The collector electrode of the input transistor is coupled by a current mirror amplifier to the base electrode of the output transistor. The ''''emitter'''' electrode of the composite transistor is at the joined base electrode of the input transistor and the collector electrode of the output transistor. The ''''collector'''' electrode of the composite transistor is at the emitter electrode of the output transistor. The current gain of the composite transistor can be made to be equal to that of the output transistor, although the apparent conductivity type of the composite device is opposite to that of the input and the output transistors.
Inventors
- 👤 Mark Berwyn Knight
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:34
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/30; H03F3/3083
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
143 words
A circuit exhibiting at a first, a second and a third terminals characteristics corresponding to those which would be exhibited by an equivalent transistor of a particular conductivity type at its base, emitter, and collector electrodes, respectively, said circuit comprising: a first and a second transistors, each of opposite conductivity type to said particular conductivity type, each of said first and said second transistors having a base and an emitter and a collector electrode; means connecting said first transistor emitter electrode to said first terminal; means connecting said first transistor base electrode and said second transistor collector electrode each to said second terminal; means connecting said second transistor emitter electrode to said third terminal; and a current mirror amplifier having an input circuit to which said first transistor collector electrode is connected and an output circuit connected to said second transistor base electrode.
Claim 2
Dependent Claim
143 words
A circuit exhibiting at a first, a second and a third terminals characteristics corresponding to those which would be exhibited by an equivalent transistor of a particular conductivity type at its base, emitter, and collector electrodes, respectively, said circuit comprising: a first and a second transistors, each of opposite conductivity type to said particular conductivity type, each of said first and said second transistors having a base and an emitter and a collector electrode; means connecting said first transistor emitter electrode to said first terminal; means connecting said first transistor base electrode and said second transistor collector electrode each to said second terminal; means connecting said second transistor emitter electrode to said third terminal; and a current mirror amplifier having an input circuit to which said first transistor collector electrode is connected and an output circuit connected to said second transistor base electrode.
Claim 3
Dependent Claim
121 words
A circuit as set forth in claim 1 having in combination therewith to form a quasi-complementary amplifier; a third transistor of the same type as said second transistor and with similar operating characteristics, said third transistor having a base and an emitter and a collector electrode; a fourth terminal to which said third transistor collector electrode is connected, said third and said fourth terminals being for connection of direct operating potential therebetween; means for applying input signal drive current connected to said third transistor base electrode and to said first terminal; means connecting said third transistor emitter electrode to said second terminal, said second terminal providing an output terminal for supplying an output signal related to said input signal drive current.
Claim 4
Dependent Claim
32 words
The combination set forth in claim 2 wherein said first transistor has a common-base amplifier gain of substantially unity and said current mirror amplifier has a current gain of substantially minus unity.
Claim 5
Dependent Claim
33 words
The combination set forth in claim 2 wherein said first transistor has a common base amplifier gain of substantially one-half and said current mirror amplifier has a current gain of substantially minus two.
Claim 6
Dependent Claim
144 words
A composite transistor of a particular conductivity type, comprising: first and second transistors of a conductivity type opposite to said particular conductivity type, each of said first and second transIstors means having a base and an emitter and collector electrodes, the emitter electrode of said first transistor serving as the base electrode of said composite transistor, the emitter electrode of said second transistor serving as the collector electrode of said composite transistor, and said base electrode of said first transistor and the collector electrode of said second transistor being connected together to serve as the emitter electrode of said composite transistor; and a current mirror amplifier having a current input terminal and a current output terminal, connected at its current input terminal to the collector electrode of said first transistor and at its current output terminal to the base electrode of said second transistor.
Claim 7
Dependent Claim
144 words
A composite transistor of a particular conductivity type, comprising: first and second transistors of a conductivity type opposite to said particular conductivity type, each of said first and second transIstors means having a base and an emitter and collector electrodes, the emitter electrode of said first transistor serving as the base electrode of said composite transistor, the emitter electrode of said second transistor serving as the collector electrode of said composite transistor, and said base electrode of said first transistor and the collector electrode of said second transistor being connected together to serve as the emitter electrode of said composite transistor; and a current mirror amplifier having a current input terminal and a current output terminal, connected at its current input terminal to the collector electrode of said first transistor and at its current output terminal to the base electrode of said second transistor.
Claim 8
Dependent Claim
108 words
A composite transistor as set forth in claim 5 wherein said current mirror amplifier comprises: third and fourth transistors of said particular conductivity type each having a base and an emitter and a collector electrodes, the collector electrodes of said third and said fourth transistors being direct coupled respectively to said current input terminal and to said current output terminal each of said current mirror amplifier, the emitter electrodes of said third and said fourth transistors each being connected to a common terminal to receive an energizing potential, and the base electrodes of said third and said fourth transistors each being direct coupled to said current input terminal.
Claim 9
Dependent Claim
108 words
A composite transistor as set forth in claim 5 wherein said current mirror amplifier comprises: third and fourth transistors of said particular conductivity type each having a gate and a source and a drain electrodes, the drain electrodes of said third and said fourth transistors being direct coupled respectively to said current input terminal and to said current output terminal each of said current mirror amplifier, the source electrodes of said third and said fourth transistors each being connected to a common terminal to receive the energizing potential, and the gate electrodes of said third and said fourth transistors each being direct coupled to said current input terminal.
Claim 10
Dependent Claim
87 words
In combination: input and output transistors of the same conductivity type, each such transistor having base, emitter and collector electrodes; a current mirror amplifier receptive of the collector current of said input transistor for providing the base current to said output transistor; a signal input terminal at the emitter electrode of said input transistor; a signal output terminal connected to the base electrode of said input transistor and the collector electrode of said output transistor; and a common terminal at the emitter electrode of said output transistor.
Claim 11
Dependent Claim
87 words
In combination: input and output transistors of the same conductivity type, each such transistor having base, emitter and collector electrodes; a current mirror amplifier receptive of the collector current of said input transistor for providing the base current to said output transistor; a signal input terminal at the emitter electrode of said input transistor; a signal output terminal connected to the base electrode of said input transistor and the collector electrode of said output transistor; and a common terminal at the emitter electrode of said output transistor.
Claim 12
Dependent Claim
95 words
A composite transistor of a particular conductivity type comprising: first and second transistors of a conductivity type opposite to said particular conductivity type, each having a base and an emitter and a collector electrodes, means for applying input signal to said first transistor so as to operate it as a common-base amplifier; a current mirror amplifier responsive to collector current of said first transistor to supply base current to said second transistor, thereby to form a cascade connection of said common base amplifier followed by said current mirror amplifier followed by base-driven said second transistor.
Claim 13
Dependent Claim
95 words
A composite transistor of a particular conductivity type comprising: first and second transistors of a conductivity type opposite to said particular conductivity type, each having a base and an emitter and a collector electrodes, means for applying input signal to said first transistor so as to operate it as a common-base amplifier; a current mirror amplifier responsive to collector current of said first transistor to supply base current to said second transistor, thereby to form a cascade connection of said common base amplifier followed by said current mirror amplifier followed by base-driven said second transistor.
References Cited (Backward Citations)
US3531730A
Cited
US3813606A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-27 | 1978-07-29 | 1979-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-27 | 1982-07-29 | 1983-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-27 | 1986-07-29 | 1987-01-28 | $7700.00 | Window Closed / Lapsed |