Differential charge pump with low voltage common mode feedback circuit
US6275097A · kind A · utility
10Cited by
25References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 2, 1999 |
| Grant date | Aug 14, 2001 |
| Priority date | — |
| Expiry date | Apr 2, 2019 |
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.