Patent US3725754A successfully refreshed from Google Patents.
US3725754A
Expired / Lapsed
US
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Transistor circuit of compound connection
Assignee: NEC Corp
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Filing: 1972-06-15
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Granted: 1973-04-03
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Expires: 1992-06-15
Abstract
Abstract A compound connection transistor circuit in which an additional transistor is connected between a pair of transistors of opposite polarities, to thereby prevent undesired oscillation of the circuit.
Inventors
- 👤 T Furuhashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:53
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/34; H03F3/343; H03F3/3432; H03F3/3435; H03F3/3437; H03F1/00; H03F1/08; H03F1/083; H10; H10D; H10D84/00; H10D84/60; H10D84/63
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
89 words
A transistor circuit of the compound connection comprising a first transistor having a base, an emitter, and a collector, a second transistor of an opposite polarity to said first transistor and having a base, an emitter, and a collector, said second transistor having its base connected to the collector of said first transistor, and a third transistor of a polarity identical to that of said first transistor having a base connected to the emitter of said first transistor and an emitter connected to the collector of said second transistor.
Claim 2
Dependent Claim
89 words
A transistor circuit of the compound connection comprising a first transistor having a base, an emitter, and a collector, a second transistor of an opposite polarity to said first transistor and having a base, an emitter, and a collector, said second transistor having its base connected to the collector of said first transistor, and a third transistor of a polarity identical to that of said first transistor having a base connected to the emitter of said first transistor and an emitter connected to the collector of said second transistor.
Claim 3
Dependent Claim
25 words
The compound-transistor circuit as claimed in claim 1, in which said first and third transistors are of PNP, and said second transistor is of NPN.
Claim 4
Dependent Claim
30 words
The compound-connected transistor circuit as claimed in claim 1, in which said first transistor is of the type having its emitter and collector regions laterally arranged in its base region.
Claim 5
Dependent Claim
27 words
The compound-transistor circuit as claimed in claim 1, further comprising a resistor coupled between the emitter of said second transistor and the collector of said third transistor.
Claim 6
Dependent Claim
53 words
The compound-transistor circuit of claim 1, in which a closed loop is defined by the collector of said first transistor, the base and collector of said second transistor, the emitter and base of said third transistor, and the emitter of said first transistor, the gain of said closed loop being less than unity.
References Cited (Backward Citations)
US3197710A
Cited
US3437945A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |