Vertical detail coring circuit to track a gain adjusted signal

Details Vertical detail coring circuit to track a gain adjusted signal Vertical detail coring circuit to track a gain adjusted signal

1981-11-19

1984-06-12

Chin, Tommy P.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 36, 358 37, 358166, H04N 9535

Patent

active

044545339

ABSTRACT:
A coring circuit is provided in a system which includes a gain controlled device. The diodes which produce the coring effect are biased by a signal which is related to the gain control signal coupled to the device. In this way, the coring threshold is made to vary relative to changes in the amplitude of the applied signal so that the percentage of coring remains fixed over a range of applied signal amplitude levels.

REFERENCES:
patent: 4096516 (1978-06-01), Pritchard
patent: 4224638 (1982-09-01), Pritchard
patent: 4245237 (1981-01-01), Lagoni
patent: 4316210 (1982-02-01), Wharton
patent: 4350995 (1982-09-01), Harlan
patent: 4365266 (1982-12-01), Lagoni
patent: 4402006 (1983-08-01), Karlock

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