Method and apparatus for defeating the operation of an ic...

Details Method and apparatus for defeating the operation of an ic... Method and apparatus for defeating the operation of an ic...

H - Electricity

04

N

H04N 5/21 (2006.01) H04N 5/53 (2006.01) H04N 7/171 (2006.01)

Patent

CA 2048759

Apparatus for defeating a noise inverter disposed within the IC includes circuitry for changing the amplitude of the AGC signal applied to an AGC amplifier prior to the noise inverter so as to lower the level of the signal fed to the noise inverter. As a result, the signal fed to the noise inverter is less than the threshold signal level necessary for operation of the noise inverter. This enables use of an EIA multiport standard decoder with a standard television signal processing IC wherein the noise inverter is not directly accessible for defeating it.

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