Stereo receiver circuit

Details Stereo receiver circuit Stereo receiver circuit

1989-07-18

1990-12-11

Isen, Forester W.

Electrical audio signal processing systems and devices

Binaural and stereophonic

Broadcast or multiplex stereo

381 13, H04H 500

Patent

active

049775979

ABSTRACT:
Stereo receiver circuit for processing a multiplex signal comprising a pilot signal by means of a pilot signal detector which detects frequency components in the multiplex signal at the frequency of the pilot signal and which controls a Schmitt trigger for influencing the mono/stereo operation, said circuit also comprising a control circuit capturing the noise components in the multiplex signal and acting on the Schmitt trigger. To prevent the Schmitt trigger from switching between the state for mono operation and the state for stereo operation in the case of weak reception field strengths, the control circuit is only active in mono operation and influences the input signal of the Schmitt trigger in the case of reception of sufficiently strong noise components to such an extent that the Schmitt trigger remains in its switching state for mono operation.

REFERENCES:
patent: 3790714 (1974-02-01), Ohsawa
patent: 4718113 (1988-01-01), Rother et al.
patent: 4769841 (1988-09-01), Cugnini

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