Abstract: In a highly accurate linear scan control for a CRT image display system useful for reproducing photographic images, distortion effects produced by system transients resulting from deflection drive amplifier circuits, are eliminated by introducing a step incremental increase in the input drive waveform at the start of the trace (scan) interval following the end of the retrace interval.

Abstract: A high bandwidth video output amplifier circuit suitable for driving a cathode ray tube for printing high resolution images on photographic stock with good tonal reproduction includes a high voltage amplifier comprising an emitter follower amplifier with a constant current collector load circuit inputing to an emitter follower buffer current amplifier circuit which drives an output load device such as a cathode ray tube. The constant current collector load provides desired high amplifier gain. A negative feedback path is coupled from the buffer output to the input of the high voltage emitter follower amplifier circuit via an intermediate emitter follower buffer at the input to the voltage amplifier transistor. The feedback provides stable, controlled overall voltage gain and the intermediate buffer amplifier isolates the video input and feedback path from the collector-base Miller capacitance of the voltage amplifier transistor thereby providing a significant extension of the amplifier bandwidth.