Adaptive multiplex blend control for stereo decoder to maintain

Details Adaptive multiplex blend control for stereo decoder to maintain Adaptive multiplex blend control for stereo decoder to maintain

1979-03-27

1980-08-05

Olms, Douglas W.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455303, H04H 500

Patent

active

042163536

ABSTRACT:
An integrated circuit stereo decoder includes a blend control input terminal. The DC control voltage on this input terminal determines channel separation. During multiplex FM reception of multi-path signals, the signal strength signal has AM and a DC components. By detecting and amplifying the AC component and adding it to the DC component of the signal strength signal, in phase opposition, the presence of multi-path can be made to reduce the resulting combined signal strength signals which, in turn, is connected to the blend control terminal. Accordingly, the presence of multi-path reduces separation to maintain signal to noise ratio and reduce distortion.

REFERENCES:
patent: 3673342 (1972-06-01), Muller
patent: 3823268 (1974-07-01), Modafferi
patent: 4029906 (1977-06-01), Takahashi

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