Low voltage push-pull amplifier
US4586001A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 3, 1984 |
| Grant date | Apr 29, 1986 |
| Priority date | — |
| Expiry date | Apr 3, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R25/502
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A Class B push-pull amplifier designed for use at low supply voltages (e.g. 1 to 2 volts) wherein complementary push-pull output transistors T.sub.3, T.sub.4 are biased by a biasing chain consisting of resistor R.sub.1, transistor T.sub.1, resistor R.sub.2, transistor T.sub.2, resistor R.sub.3, with the signal to the bases of T.sub.3, T.sub.4 being supplied from opposite ends of R.sub.2. The value of R.sub.2 is twice that of R.sub.1 and R.sub.3. The circuit is preferably used in a bridge configuration with a second similar amplifier set at unity gain driven from the first amplifier. It may be used to power the loudspeaker of a miniature radio receiver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.