Dual loop phase locked circuit with sweep generator and compensation for drift
US5210509A · kind A · utility
11Cited by
4References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 29, 1992 |
| Grant date | May 11, 1993 |
| Priority date | — |
| Expiry date | May 29, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S331/02
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A dual loop phase locked circuit is disclosed in which a first loop includes a phase detector, a filter, and a VCO; as a second loop includes a sweep voltage generator, a compensation circuit, and the filter of the first loop. Due to the compensation circuit, the VCO accurately tracks a signal from the sweep voltage generator, even though the filter has an electrical parameter that drifts with time and/or age and/or component selection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.