FM stereophonic receiver

Details FM stereophonic receiver FM stereophonic receiver

1991-03-27

1993-04-13

Ng, Jin F.

Electrical audio signal processing systems and devices

Binaural and stereophonic

Broadcast or multiplex stereo

381 3, 381 10, 381 11, H04H 500

Patent

active

052029255

ABSTRACT:
An FM stereophonic receiver including an FM detector circuit for detecting an intermediate frequency signal, and for providing a main signal and a sub signal in response to the detected intermediate frequency signal, a first high cut circuit, connected to receive the main signal, for providing a first high cut signal, a high cut control circuit for providing a high cut control signal in accordance with a received signal field strength level, the first high cut circuit controlling a frequency characteristic of the main signal in accordance with the high cut control signal, a second high cut circuit for providing a second high cut signal, a separation control circuit for providing a separation control signal in accordance with the received signal field strength level, the second high cut circuit controlling a frequency characteristic of the sub signal in accordance with the separation control signal, and a stereophonic demodulation circuit for providing separated right and left channel signals.

REFERENCES:
patent: 3673342 (1972-06-01), Muller
patent: 4029906 (1977-06-01), Takahashi
patent: 4032717 (1977-06-01), Mallon
patent: 4208547 (1980-06-01), Simeau
patent: 4607381 (1986-08-01), Shimizu
patent: 4633497 (1986-12-01), Ichikawa
patent: 4841572 (1989-06-01), Klayman

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