Low-pass filter circuit

Details Low-pass filter circuit Low-pass filter circuit

1984-07-13

1986-12-30

Isen, Forester W.

Electrical audio signal processing systems and devices

Binaural and stereophonic

Broadcast or multiplex stereo

381 13, H04H 500

Patent

active

046334963

ABSTRACT:
A low-pass filter circuit for suppressing a subcarrier contained in an FM stereo demodulation signal in which the output signal of the circuit is unaffected by magnetic distortion. The FM stereo demodulation signal is applied through a low-pass filter to n sample-and-hold circuits connected in parallel with one another. The outputs of the sample-and-hold circuits are summed to form an output signal in which the subcarrier signal has been suppressed. The n sample-and-hold circuits are driven with a corresponding number of sampling pulse signals of different phases.

REFERENCES:
patent: 4386235 (1983-05-01), Naito
patent: 4569072 (1986-02-01), Van Roermand

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