Differential pair with constant offset
US8471636B2 · kind B2 · utility
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18References
10Claims
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Key dates
| Filing date | Mar 7, 2012 |
| Grant date | Jun 25, 2013 |
| Priority date | — |
| Expiry date | Mar 7, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45482
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A bias current is generated for an unbalanced differential pair that is proportional to the transconductance gain of the differential pair. When the transconductance gain varies (e.g., due to temperature variations), the bias current varies in proportion thereby maintaining a constant offset voltage. In some implementations, a voltage to current converter circuit generates the bias current from a constant reference voltage that is independent of temperature and voltage supply variations (e.g., a bandgap reference voltage).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.