Push-pull amplifier
US5361041A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 17, 1993 |
| Grant date | Nov 1, 1994 |
| Priority date | — |
| Expiry date | Jun 17, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/30129
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An improved push-pull amplifier having a driver circuit for driving a source follower output transistor. The driver circuit includes a replicating transistor having electrical characteristics substantially similar to those of the source follower transistor, a buffer amplifier, and a circuit, coupled to the replicating transistor and the buffer amplifier, for summing the voltage across the replicating transistor and the buffer output signal to provide a gate signal to the source follower output transistor. A cross current feedback circuit regulates the quiescent current flow through the output transistors by adjusting the gate signal provided to the upper, source follower output transistor in response to a sensed current flow through the lower output transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.