CRT BLANKING AND BRIGHTNESS CONTROL CIRCUIT

摘要

The disclosed embodiment of the present invention is a CRT blanking and brightness control circuit which employs an amplifier stage responsive to a square wave input signal and having an output connected to the cathode of a CRT, a wave shaping circuit connected to the load impedance of the amplifier stage, and a level control circuit connected to the output of the amplifier stage. The wave shaping circuit is responsive to the trailing edge of the input signal for discharging the stray capacitance associated with the load impedance to effect a fast rise time of the signal at the output of the amplifier stage. The level control circuit is operable to vary the amplitude of the amplifier stage output which is applied to the cathode of the CRT.