Circuit for adjusting a horizontal center of a raster for a moni

Details Circuit for adjusting a horizontal center of a raster for a moni Circuit for adjusting a horizontal center of a raster for a moni

1998-05-28

2000-07-18

Ham, Seungsook

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315403, 315405, G09G 104, H01J 2956, H01J 2970

Patent

active

06091212&

ABSTRACT:
Disclosed is a circuit for adjusting a horizontal center of a raster displayed on a monitor CRT, which includes a current generating circuit which can control an amount of a direct current flowing through a horizontal deflection yoke of the monitor based on a control voltage, a first voltage, and a second voltage. A control part generates the control voltage in response to a center adjustment signal. A voltage generating circuit generates the first and second voltages, respectively. The first voltage has a higher potential than that of a B.sup.+ voltage which is applied to the horizontal deflection yoke, and the second voltage has a lower potential than that of the B.sup.+ voltage. The current generating circuit either generates a first current flowing into the horizontal deflection yoke to increase the direct current or a second current flowing out therefrom to decrease the direct current, such that the horizontal center of the raster is controlled.

REFERENCES:
patent: 4954757 (1990-09-01), Berwin

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