Charged coupled device time base corrector system

Details Charged coupled device time base corrector system Charged coupled device time base corrector system

1979-04-06

1981-10-27

Wolfe, John H.

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

358127, H04N 504, H04N 5785

Patent

active

042977282

ABSTRACT:
An improved charged coupled device time base corrector system to compensate for a change in the phase or frequency of input video signals, as occurs in the playback of a video tape recorder, by changing the nominal delay through the corrector, comprising, in combination, an input feedback circuit and an output feedback circuit. The input feedback circuit includes two cascaded infinite gain circuits, an infinite gain phase detector followed by an infinite gain voltage amplifier which gives an error voltage that controls the frequency of the voltage controlled oscillator (VCO) utilized to control the system delay. The output servo loop always adapts itself to the input error voltage. The VCO is thereby driven at a rate of change of its frequency proportional to the incoming error signal. .

REFERENCES:
patent: 3580991 (1971-05-01), Krause
patent: 3758711 (1973-09-01), Crosno
patent: 4005476 (1977-01-01), Dickopp et al.
patent: 4028729 (1977-06-01), Browder
patent: 4074307 (1978-02-01), Dischert et al.
patent: 4133009 (1979-01-01), Kittler et al.
patent: 4150395 (1979-04-01), Pritchard

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