Single ended push-pull amplifier
US4274059A · kind A · utility
11Cited by
1References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 27, 1978 |
| Grant date | Jun 16, 1981 |
| Priority date | — |
| Expiry date | Nov 27, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/3077
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Two closed loops including a base bias controlling circuit are provided in a single ended push-pull amplifier. The base bias controlling circuit controls base bias voltages of respective transistors constituting the final stage of the push-pull operation so that a predetermined small amount of collector current flows via each of the collector-emitter paths of the transistors irrespective of the presence and absence of the input signal. Because of the predetermined collector currents, none of the transistors is held at cutoff in operation, thereby preventing the occurrence of the crossover distortion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.