Self-tracking injection lock voltage controlled oscillator

Details Self-tracking injection lock voltage controlled oscillator Self-tracking injection lock voltage controlled oscillator

1976-06-28

1977-12-13

Richardson, Robert L.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 8, 331 1R, 331 25, H04N 946, H04N 5795

Patent

active

040632792

ABSTRACT:
Apparatus, including an injection lock and voltage controlled oscillator, generates a signal that follows the average frequency variations and instantaneous phase variations of a repetitive non-continuous signal. The oscillator injection lock input receives the repetitive signal and its DC control input receives an error signal generated in an AFC loop which derives the difference between the oscillator output and the repetitive signal average frequency. In one particular application, the appartus is useful in a color television signal processing or reproducing system for generating a television color subcarrier signal. The apparatus is further disclosed in connection with a demodulation-remodulation type color corrector in a video reproducing system.

REFERENCES:
patent: 3733432 (1973-05-01), Arimura et al.

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