Raster position adjusting circuit

Details Raster position adjusting circuit Raster position adjusting circuit

1992-02-20

1993-05-18

Issing, Gregory C.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

G09G 104, H01J 2954

Patent

active

052124290

ABSTRACT:
A raster position adjusting circuit for controlling the raster position on a CRT, the circuit being equipped with a constant-current supply source and a voltage-controlled type current supply source which are coupled to each other. The drawing current of the voltage-controlled type current supply source is arranged to be controllable in accordance with the output voltage from a digital-to-analog converter, thereby controlling the emitter-base voltages of first and second transistors connected to a junction point between both the current supply sources. This control of the emitter-base voltages of the first and second transistors allows the control of the direction and value of a current flowing through a horizontal deflecting coil, thereby effecting the raster position adjustment.

REFERENCES:
patent: 3814981 (1974-06-01), Rusk
patent: 4675581 (1987-06-01), Dietz
patent: 4703233 (1987-10-01), Rodriguez-Cavazos

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