Retrace Driven Deflection Circuit

A simple, efficient cathode-ray tube deflection circuit suitable for standard television horizontal sweep applications with excellent linearity has been developed. The circuit employs either a single transistor or a tube, operated as a switch. The sweep amplitude may be adjusted continuously without affecting the linearity or general performance of the circuit. The switching operation is such that the inrush current upon closing the switch and the voltage build-up upon opening the switch are delayed sufficiently to prevent excessive momentary dissipation in the switching device. This and other circuit characteristics makes it possible to operate the switching device efficiently, particularly when the circuit is transistorized, and therefore permits exceptionally wide deflection angles with a relatively small transistor.