All-digital FM stereo demodulator and demodulation method
US6901146B1 · kind B1 · utility
5Cited by
4References
22Claims
0Family size
Assignee
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Key dates
| Filing date | Nov 28, 2000 |
| Grant date | May 31, 2005 |
| Priority date | — |
| Expiry date | Nov 2, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D3/006
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A stereo composite signal including a pilot signal is demodulated by processing input samples to obtain internal samples having variable sampling timings, synchronizing these sampling timings with the pilot signal, and digitally processing the internal samples to obtain stereo audio data. The internal samples may be obtained from the input samples by decimation or interpolation. Since the sampling frequency and sampling timing of the input samples do not have to be precisely controlled, no voltage-controlled oscillator is needed, and the demodulator can easily be incorporated into a monolithic integrated circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.