Systems and methods for cancelling phase-locked loop supply noise
US8674753B2 · kind B2 · utility
2Cited by
17References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 3, 2008 |
| Grant date | Mar 18, 2014 |
| Priority date | — |
| Expiry date | Feb 24, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/0895
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
One embodiment of an apparatus for cancelling supply noise includes an input circuit operable to receive an input from a charge pump and a drive circuit connected to an output of the input circuit. The drive circuit is operable to provide an output matching the input to the input circuit when a voltage source powering the input circuit and the drive circuit is stable, and to introduce a contrary voltage change on the buffered output when the voltage source is noisy, with the contrary voltage change being contrary to a voltage change on the voltage source due to noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.