Method and apparatus for charge leakage compensation for charge pump
US8040167B1 · kind B1 · utility
3Cited by
2References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 26, 2010 |
| Grant date | Oct 18, 2011 |
| Priority date | — |
| Expiry date | Mar 26, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/0895
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An apparatus is disclosed, the apparatus comprising: a charge pump for receiving a phase signal representing a result of a phase detection and for outputting a current flowing between an internal node and an output node; a capacitive load shunt at the output node; a current source controlled by a bias voltage for outputting a compensation current to the internal node; a current sensor inserted between the internal node and the output node for sensing the current; and a feedback network for adjusting the bias voltage in accordance with an output of the current sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.