Dual indicator circuit for tuning and stereo signals

Details Dual indicator circuit for tuning and stereo signals Dual indicator circuit for tuning and stereo signals

1984-04-30

1986-07-22

Isen, Forester W.

Electrical audio signal processing systems and devices

Binaural and stereophonic

Broadcast or multiplex stereo

H04H 500

Patent

active

046023798

ABSTRACT:
In a stereophonic broadcasting receiver, a single indicator with two levels of illumination serves to provide indication of both accurate tuning and the presence of stereophonic signals. One signal or a combination of signals related to the tuning circuits of the receiver cause the indicator to be illuminated to a perceptible level. When, by use of a pilot tone detector, it is certain that stereophonic signals are being received, additional current is caused to flow through the indicator, raising the illumination to the maximum allowable level. The circuit has particular application to manually tuned receivers.

REFERENCES:
patent: 4236041 (1980-11-01), Thomas

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