Transistorized push-pull amplifier circuit utilizing dual bias supply
Abstract
Abstract A DIRECT COUPLED TRANSISTOR AUDIO AMPLIFIER COMPRISING A PHASE-SPLITTER STAGE AND A PUSH-PULL OUTPUT STAGE DRIVEN THEREBY, IN WHICH THE PHASE-SPLITTER TRANSISTOR IS BIASED BOTH FROM A DC BIAS SUPPLY AND THE OUTPUT OF THE OUTPUT STAGE. A FIRST RESISTOR COUPLES THE BASE OF THE PHASE-SPLITTER TRANSISTOR TO THE OUTUT OF THE OUTPUT STAGE AND A SECOND RESISTOR, WHICH PREFERABLY HAS A VALUE ABOUT FOUR TIMES GREATER THAN THAT OF THE FIRST RESISTOR, COUPLES THE BASE OF THE PHASE-SPLITTER TRANSISTOR TO THE BIAS SUPPLY. BY USE OF SUCH BIASING THE PHASE-SPLITTER TRANSISTOR IS MAINTAINED IN CLASS A OPERATION DESPITE SUBSTANTIAL VARIATIONS IN THE AMPLITUDE OF THE INPUT SIGNAL SUPPLIED THERETO.
Inventors
- 👤 Earl P Gardner
Bibliographic Details
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| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |