FM demodulator including tuning of a filter and detector
US6104238A · kind A · utility
23Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 23, 1999 |
| Grant date | Aug 15, 2000 |
| Priority date | — |
| Expiry date | Mar 23, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/152
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An FM demodulator circuit includes a filter (10) and a detector (14) for receiving a frequency modulated input signal and for providing a demodulated output signal. A tuning circuit (19) is provided for tuning the frequency characteristics of the filter and of the detector. A DC offset estimator (18) is connected to the output of the detector to produce an offset signal representing the estimated DC offset of the demodulated output signal, and to provide the offset signal to the tuning circuit. The tuning circuit is operable to tune the frequency characteristics of the filter and detector in dependence upon the offset signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.