Phase-locked loop demodulator having loop filter controlled by lock detector
US5204634A · kind A · utility
0Cited by
4References
6Claims
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Inventors
Key dates
| Filing date | Mar 5, 1992 |
| Grant date | Apr 20, 1993 |
| Priority date | — |
| Expiry date | Mar 5, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S331/02
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A phase-locked loop demodulator comprises a mixer and a loop filter between an input and an output. A voltage-controlled oscillator is connected between its output and an input of the mixer. The demodulator further comprises a lock-on detector circuit whose output signal is adapted to increase the static loop gain after lock-on by modifying the characteristics of the filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.