Patent US3553601A successfully refreshed from Google Patents.
US3553601A
Expired / Lapsed
US
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Transistor driver circuit
Assignee: Motorola Solutions Inc
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Filing: 1969-02-10
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Granted: 1971-01-05
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Expires: 1989-02-10
Abstract
Abstract A TRANSISTOR AMPLIFIER CIRCUIT IS PROVIDED FOR OPERATION AS A CLASS B AMPLIFIER AND WHICH HAS A VOLTAGE SWING CAPABILITY WHICH IS AS CLOSE AS POSSIBLE TO THE SUPPLY VOLTAGE. THE TRANSISTORS USED ARE ALL OF THE SAME POLARITY TYPE SO THAT THE CIRCUIT MAY BE EASILY MANUFACTURED AS AN INTEGRATED CIRCUIT. THE CIRCUIT PROVIDES AN EMITTER FOLLOWER OUTPUT AMPLIFIER HAVING A TRANSISTOR COUPLED IN THE REVERSE DIRECTION BETWEEN ITS EMITTER AND BASE AND BIASED TO SATURATION TO PROVIDE A PATH FOR CURRENT FLOW WHEN THE EMITTER FOLLOWER TRANSISTOR IS CUTOFF.
Inventors
- 👤 James R Glasser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:50
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/50; H03F3/20; H03F3/21; H03F3/213
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |