Combined phase comparator and charge pump circuit
US6275072A · kind A · utility
16Cited by
5References
52Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 7, 1999 |
| Grant date | Aug 14, 2001 |
| Priority date | — |
| Expiry date | Oct 7, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/191
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A phase comparison of timing signals is made by combinational circuitry which receives the timing signals and a window signal, the window signal identifying edges of the timing signals to be compared. The comparison may result in a charge pumped output which can be fed back to control the phase of one of the timing signals. The phase comparator and charge pump circuit can be included in a multiplier circuitry in which the phase of an input signal is directly compared to the phase of an edge of the multiplied signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.