Clock recovery circuit

Details Clock recovery circuit Clock recovery circuit

1991-11-26

1993-11-09

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Picture signal generator

358148, 358149, H04N 504

Patent

active

052608123

ABSTRACT:
A medical imaging system includes a video interface connecting different medical imaging modalities to a laser printer. The video interface includes a clock recovery phase-lock-loop (PLL) as a frequency synthesizer video signal from a modality. A second PLL inserts a pulse train equal to the horizontal frequency into an analog video signal having a vertical sync interval with no serrating pulses. This assures the clock recovery PLL will maintain lock during the vertical sync interval.

REFERENCES:
patent: 4222074 (1980-09-01), Breithaupt
patent: 4654708 (1987-03-01), de la Guardia et al.
patent: 5005079 (1991-04-01), Satomi

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