Actively biased class AB output stage with low quiescent power, high output current drive and wide output voltage swing
US6501334B1 · kind B1 · utility
13Cited by
5References
17Claims
0Family size
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Key dates
| Filing date | Nov 13, 2000 |
| Grant date | Dec 31, 2002 |
| Priority date | — |
| Expiry date | Nov 13, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/3076
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A class ‘AB’ amplifier output stage has an active current bias source that provides base drive current to the output transistors that is proportional to the signal input voltage level. The output transistor currents are modulated with the input signal such that the quiescent supply current is reduced to a very small level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.