Differential charge pump with low voltage common mode feedback circuit
US6515536B2 · kind B2 · utility
5Cited by
27References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 14, 2001 |
| Grant date | Feb 4, 2003 |
| Priority date | — |
| Expiry date | Jun 14, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/0895
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A differential charge pump utilizing a common mode feedback circuit. The charge pump includes a dual reference current source and outputs a differential current signal by modifying currents routed to the outputs utilizing current paths having transistors maintained in the linear region within the current paths. The common mode feedback circuit includes differential transistors requiring a maximum power supply voltage of a common mode reference voltage plus a transistor threshold voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.