Picture signal generator with light level control

Details Picture signal generator with light level control Picture signal generator with light level control

1977-04-18

1979-02-20

Murray, Richard

Facsimile and static presentation processing

Facsimile

Recording apparatus

358228, H04N 519

Patent

active

041410432

ABSTRACT:
A picture signal generator includes a fast-acting servo loop responsive to changes in video output level to adjust image tube photocathode-to-storage-target accelerating voltage to maintain desired video output level, and a slow-acting servo loop responsive to the output of a portion of the fast-acting servo loop for adjusting input light level to the photocathode for optimum image tube operation.

REFERENCES:
patent: 4050085 (1977-09-01), Prince et al.

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