Single loop output common mode feedback circuit for high performance class AB differential amplifier
US6459338B1 · kind B1 · utility
17Cited by
1References
4Claims
0Family size
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Key dates
| Filing date | May 23, 2001 |
| Grant date | Oct 1, 2002 |
| Priority date | — |
| Expiry date | May 23, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45711
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A class AB input differential amplifier employs a single loop output common mode feedback circuit (CMFC) to achieve high performance by controlling the common mode output voltage. The CMFC includes a small amplifier to compare the common mode voltage at the output with a desired voltage specified at the common mode output voltage pin. Having only one loop to control this voltage instead of two makes the design more reliable and easier to compensate since there is no need to worry about how multiple loops will interact.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.