Image tube suppression circuit

Details Image tube suppression circuit Image tube suppression circuit

1977-09-09

1983-04-05

Psitos, Aristotelis M.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358223, 315 10, 315383, H04N 519, H04N 534, H01J 3126, H01J 2952

Patent

active

043793100

ABSTRACT:
A suppression circuit processes the video signal from an anti-comet tail (ACT) image pickup tube and develops a control signal indicative of illumination highlights exceeding a predetermined level. The control signal is coupled through ACT pulsing circuits to the control elements of the ACT image pickup tube to automatically enable the beam control element pulsing so as to increase the beam current only in the presence of an illumination highlight to force the recharging of the target to cathode potential in the area of the highlight.

REFERENCES:
patent: 3548250 (1970-12-01), Van Roosmalen et al.
patent: 3610823 (1971-10-01), Whenen et al.
patent: 3955116 (1976-05-01), Van Den Berg

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