Push-pull amplifier having bootstrap capacitor isolation
US5315263A · kind A · utility
3Cited by
1References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1992 |
| Grant date | May 24, 1994 |
| Priority date | — |
| Expiry date | Dec 23, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/3071
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An audio power amplifier includes a stacked pair of complementary transistors having the emitters commonly coupled to a load. A driver stage couples the bases of the stacked pair to a source of audio frequency signal. A bootstrap capacitor is coupled between the commonly coupled output node and the supply voltage. An isolation diode is interposed between the bootstrap capacitor and the operating supply to prevent discharge of the bootstrap capacitor into the operating supply during positive signal swings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.