Digital circuit for decoding digitized, demodulated FM stereo si

Details Digital circuit for decoding digitized, demodulated FM stereo si Digital circuit for decoding digitized, demodulated FM stereo si

1985-02-22

1986-12-16

Isen, Forester W.

Electrical audio signal processing systems and devices

Binaural and stereophonic

Broadcast or multiplex stereo

364724, H04H 500

Patent

active

046302999

ABSTRACT:
A simple digital filter having only a single multiplier operates to extract the pilot tone from a demodulated and digitized FM stereo signal. The number of poles in the filter is chosen so that the filter output is also usable to produce a digitized representation of the carrier tone for the left minus right stereo channel. This signal is in turn used to decode the input representation into the desired left and right channel signals. The circuit of the present invention is particularly amenable to fabrication on an integrated circuit chip.

REFERENCES:
patent: 4569072 (1986-02-01), Van Roermund

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