Low Power Consumption Driver for Wessel Horizontal Deflection System

Power consumption is an important design criterion in television receivers today. The Wessel system, which incorporates a parallel switching-mode power supply within the basic trace-driven horizontal deflection circuit, operates over a wide range of line voltage at high efficiency. However, the low-impedance, precision toroid yokes used by some present-day receivers place even greater emphasis upon the efficiency of the Wessel system driver circuit. This paper describes a new driver circuit design which achieves more reliable operation at the required output with one-third (1/3) the power consumption of contemporary designs.