Automatic vertical size control

Details Automatic vertical size control Automatic vertical size control

1987-09-25

1988-08-23

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

358242, 358148, H01J 2970, H04N 568, N04N 504

Patent

active

047663553

ABSTRACT:
An automatic vertical display change circuit for a monitor includes a transistor that is operated in response to a mode signal for determining the amplitude of the vertical ramp produced by the vertical oscillator. The transistor is driven conductive to load the voltage supply means for the oscillator and reduce the operating voltage therefor to decrease the vertical ramp amplitude.

REFERENCES:
patent: 4679091 (1987-07-01), Kikuchi et al.

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