Receiver for AM stereo signals having a circuit for reducing dis

Details Receiver for AM stereo signals having a circuit for reducing dis Receiver for AM stereo signals having a circuit for reducing dis

1981-09-14

1983-09-20

Ng, Jin F.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455212, H04H 500

Patent

active

044058357

ABSTRACT:
A receiver for AM signals, in which the carrier is amplitude modulated with a first signal (L+R) and phase modulated with a second signal (L-R), includes a circuit for reducing distortion in the output signal due to amplitude overmodulation. This circuit includes an overmodulation detector for controlling a switch in a phase demodulation signal channel, which switch, coupled between a demodulator and an integrator in this signal channel, effectively short-circuits the input to the integrator causing the output thereof to remain constant for the duration of the overmodulation.

REFERENCES:
patent: 3076057 (1963-01-01), Baugh, Jr.
patent: 4107613 (1978-08-01), Queen et al.
patent: 4340782 (1982-07-01), Weigand et al.

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