Circuit for providing accurately spaced video and sound...

Details Circuit for providing accurately spaced video and sound... Circuit for providing accurately spaced video and sound...

H - Electricity

04

N

350/40

H04N 5/38 (2006.01) H04N 7/06 (2006.01)

Patent

CA 1207433

CIRCUIT FOR PROVIDING ACCURATELY SPACED VIDEO AND SOUND CARRIERS Abstract of the Disclosure A circuit for producing two carrier frequencies (e.g. video and audio) spaced by an accurately controlled, predetermined frequency includes a common reference oscillator connected in two phase-locked loops. Each of the phase-locked loops includes a voltage-controlled oscillator adapted to produce an output signal at one of the carrier frequencies, and means for operatively comparing the outputs of the oscillators in each of the loops with the output frequency of the reference oscillator. -1-

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