US4092552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bipolar monolithic integrated push-pull power stage for digital signals
Assignee: ITT Inc
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Filing: 1977-05-23
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Granted: 1978-05-30
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Expires: 1997-05-23
Abstract
Abstract The push-pull stage contains a special double emitter transistor which prevents current spikes during switch-over transition. One of two emitters is connected to the base of the double emitter transistor. The junction area of this emitter is many times greater than that of the other emitter.
Inventors
- 👤 Wolfgang Hoehn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:23
CPC Classifications
H; H03; H03K; H03K19/00; H03K19/02; H03K19/08; H03F; H03F3/00; H03F3/30; H03K19/003; H03K19/00346; H03K19/00353; H03K5/00; H03K5/01; H03K5/02; H10; H10D; H10D84/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
159 words
A bipolor monolithic integrated push-pull power output stage for digital signals, comprising: a first transistor having a base, emitter and collector, said collector for receiving a source of supply voltage; a second transistor having a base, emitter and collector, said emitter for coupling to the zero point of the circuit and said base forming an input; a double emitter transistor having first and second emitters, a base and a collector, said collector coupled to the emitter of said first transistor and forming an output, said first emitter coupled to the collector of said second transistor and to the base of said first transistor, and said second emitter coupled to the base of said double emitter transistor, the emitter base junction area of said second emitter being at least two times greater than that of said first emitter; and means for applying a potential to the base of said first transistor and to the base of said double emitter transistor.
Claim 2
Dependent Claim
159 words
A bipolor monolithic integrated push-pull power output stage for digital signals, comprising: a first transistor having a base, emitter and collector, said collector for receiving a source of supply voltage; a second transistor having a base, emitter and collector, said emitter for coupling to the zero point of the circuit and said base forming an input; a double emitter transistor having first and second emitters, a base and a collector, said collector coupled to the emitter of said first transistor and forming an output, said first emitter coupled to the collector of said second transistor and to the base of said first transistor, and said second emitter coupled to the base of said double emitter transistor, the emitter base junction area of said second emitter being at least two times greater than that of said first emitter; and means for applying a potential to the base of said first transistor and to the base of said double emitter transistor.
Claim 3
Dependent Claim
29 words
A bipolar monolithic integrated push-pull power output stage according to claim 1 wherein said first and second transistors and said double emitter transistor are of the same conductivity type.
Claim 4
Dependent Claim
18 words
A bipolar monolithic integrated push-pull power output stage according to claim 2 wherein said means comprises a resistor.
Claim 5
Dependent Claim
21 words
A bipolar monolithic integrated push-pull power output stage according to claim 2 wherein said means comprises a source of constant current.
Claim 6
Dependent Claim
32 words
A bipolar monolithic integrated push-pull power output stage according to claim 2 wherein the emitter base junction area of said second emitter is three times greater than that of said first emitter.
References Cited (Backward Citations)
US4049975A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-29 | 1981-11-28 | 1982-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-29 | 1985-11-28 | 1986-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-29 | 1989-11-28 | 1990-05-30 | $7700.00 | Window Closed / Lapsed |