Highly integrated television tuner on a single microcircuit

Television – Receiver circuitry

Patent

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Details

348731, 455315, 455339, H04N 544

Patent

active

057370354

ABSTRACT:
There is disclosed a fully integrated television receiver for receiving a standard antenna or cable input and outputting a standard video baseband signal and a standard audio baseband signal. The receiver employs an up-conversion mixer and a down-conversion image-rejection mixer in series to produce an on-chip IF signal. Audio detection of the IF signal is performed via an audio delay-locked loop operating in quadrature to the audio FM signal. Video detection of the IF signal is performed by frequency mixing the IF signal with the extracted video carrier of the IF signal. Variable load drive capability is provided for both the video output and the audio output.

REFERENCES:
patent: 3839676 (1974-10-01), Linnecar
patent: 4176351 (1979-11-01), DeVita
patent: 4328531 (1982-05-01), Nagashima
patent: 4340975 (1982-07-01), Onishi
patent: 4855835 (1989-08-01), Tobita
Brochure from Philips, I.sup.2 C bus specification, pp. 1-27.

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