US3792365A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Push-pull output stage circuit
Assignee: Texas Instruments Inc
•
Filing: 1972-01-18
•
Granted: 1974-02-12
•
Expires: 1992-01-18
Abstract
Abstract Disclosed is an amplifier circuit including a pair of seriesconnected output transistors of one conductivity type, a pair of driver transistors of the one conductivity type and a pair of coupling transistors of opposite conductivity type; wherein the base electrodes of the output transistors are respectively coupled to the collector electrodes of the coupling transistors, and the base electrodes of the coupling transistors are respectively coupled to the collector electrodes of the lower transistors; thereby forming push-pull branches of the amplifier.
Inventors
- 👤 E Ellbogen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:15
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/30; H03F3/3083; H03F3/3086; H03F3/3088
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
104 words
An amplifier having a push-pull output stage circuit comprising: a pair of series-connected output transistors of one conductivity type; a pair of driver transistors of said one conductivity type respectively coupled to said series-connected output transistors; a phase inverter transistor of opposite conductivity type coupled to only one of said driver transistors; and a pair of coupling transistors of said opposite conductivity type respectively coupling the output circuit of their respective driver transistor to the input circuit of their respective output transistor; and the respective driver transistors, coupling transistors, and output transistors respectively forming push-pull branches of said output stage circuit of said amplifier.
Claim 2
Dependent Claim
104 words
An amplifier having a push-pull output stage circuit comprising: a pair of series-connected output transistors of one conductivity type; a pair of driver transistors of said one conductivity type respectively coupled to said series-connected output transistors; a phase inverter transistor of opposite conductivity type coupled to only one of said driver transistors; and a pair of coupling transistors of said opposite conductivity type respectively coupling the output circuit of their respective driver transistor to the input circuit of their respective output transistor; and the respective driver transistors, coupling transistors, and output transistors respectively forming push-pull branches of said output stage circuit of said amplifier.
Claim 3
Dependent Claim
72 words
The amplifier of claim 1 wherein each of said driver transistors has its emitter electrode coupled to the emitter electrode of its respective output transistor, and each of said coupling transistors has its base electrode coupled to the collector electrode of its respective driver transistor, its collector electrode coupled to the base electrode of its respective output transistor, and its emitter electrode coupled to the collector electrode of its respective output transistor.
Claim 4
Dependent Claim
22 words
The amplifier of claim 1 and further including signal reproducing means coupled across the emitter-collector circuit of one of said push-pull branches.
Claim 5
Dependent Claim
14 words
The amplifier of claim 1 wherein said transistors are integrated on a common substrate.
Claim 6
Dependent Claim
77 words
The amplifier of claim 2, further including an input transistor of said one conductivity type and having its base electrode adapted to receive the signal to be amplified, negative and positive voltage terminals for connection to a supply voltage, the emitter and collector electrodes of said input transistor being respectively connected across the negative and positive voltage terminals, and the collector electrode of said input transistor being coupled to the base electrode of said phase inverter transistor.
Claim 7
Dependent Claim
64 words
The aMplifier of claim 5, further including voltage differential means coupled to the collector electrode of said input transistor and the positive voltage terminal for maintaining a constant voltage differential between the base electrode of the respective driver transistor of one of said push-pull branches and the base electrode of said phase inverter transistor coupled to said driver transistor of the other push-pull branch.
References Cited (Backward Citations)
US2761917A
Cited
US3537023A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |