Noise detector employing plural delay circuits

Details Noise detector employing plural delay circuits Noise detector employing plural delay circuits

1978-08-23

1980-09-02

Heyman, John S.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

328111, 455303, H03K 5159, H03K 518, H03K 1716

Patent

active

042209269

ABSTRACT:
An impulse noise detector, for use in impulse noise suppressor circuits which are used for suppressing scratch noises in disc record players, comprises a rectifier operable on an applied signal to provide a rectified signal, a smoothing circuit for smoothing the rectified signal, a pair of delay and invert circuits operable on the smoothed signal for affording a corresponding plurality of time delayed signals, and a combiner for selectively combining the time delayed signals to afford an output which is indicative of the presence, in the applied signal, of impulse noise.

REFERENCES:
patent: 3600688 (1971-08-01), Booth
patent: 3886463 (1975-05-01), Laprio
patent: 3906379 (1975-09-01), Tuhro
patent: 3940698 (1976-02-01), Itoh
patent: 3979679 (1976-09-01), Bush et al.
patent: 4162453 (1979-07-01), Rudolph

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