Automatic gain control

Details Automatic gain control Automatic gain control

H - Electricity

01

J

355/3, 375/35, 3

H01J 29/98 (2006.01) H01J 37/28 (2006.01) H03G 3/20 (2006.01)

Patent

CA 1041216

Abstract of the Invention Apparatus for stabilizing the range of black to white level in a signal to a cathode ray tube, especially a signal produced by a detector in a charged particle microscope system. The stabilizing apparatus includes electronic circuitry for remembering the most negative (blackest) excursion of the signal for a predetermined time period, means for stabilizing all video input to that level and means for controlling the range of the signal (black to white) to remain within predetermined limits. -1-

222471

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