Shutdown system in a television receiver

Details Shutdown system in a television receiver Shutdown system in a television receiver

1992-11-18

1993-08-17

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

315411, H04N 568

Patent

active

052374211

ABSTRACT:
In a television receiver the voltage applied to the loudspeaker from the audio amplifier is low pass filtered and coupled to a threshold detector. Normal audio is attenuated so that the detector is not tripped, but steady DC is passed through the filter and trips the detector. The output of the detector is coupled to the X-ray protection circuit of the receiver which acts to shut the receiver "off".

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British Provisional Patent Application No. 8,929,103.3.

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