Multi-loop controlled VCO
US5142246A · kind A · utility
22Cited by
31References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 19, 1991 |
| Grant date | Aug 25, 1992 |
| Priority date | — |
| Expiry date | Jun 19, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/1075
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Separate phase (or frequency/phase) detectors are used in separate feedback loops of a phase-locked loop, one of the detectors having a dead zone and the other detector having no dead zone. The dead zone of the one detector, rather than being regarded as undesirable as in the prior art, is used to gradually shift the effective loop bandwidth of the phase-locked loop from a wide bandwidth to a narrow bandwidth without requiring any deliberate control action or switching circuitry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.