DEFLECTIVE DISTORTION CORRECTIVE CIRCUIT AND CRT DISPLAY DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a deflective distortion corrective circuit without changing the number of bits of a D/A converter and without requiring excess circuit elements and capable of obtaining sufficient corrective precision even when a deflection frequency is low and securing required amplitude even when the deflection frequency is high. SOLUTION: In this circuit 1, a second analog switch 16 is connected serially between a D/A converter 11 and an operational amplifier 12. A control signal of a prescribed pulse width is generated from a horizontal clock signal by a pulse width control means 17, and the second analog switch 16 is open/close controlled by the pulse width of this control signal. The D/A converter 11 updates the input data in the timing of the rise of the control signal.