Abstract: First and second capacitors are charged prior to a degaussing interval. A first switch couples the first capacitor to a degaussing coil to initiate the degaussing interval. The first capacitor and the degaussing coil form a resonant circuit that resonates to generate a decaying degaussing current. During a predetermined portion of each cycle of the degaussing current, a second switch couples a precharged second capacitor in parallel with the first capacitor to form a charge transfer arrangement that transfers charge from the second to the first capacitor for replenishing energy losses in the first capacitor. The charge transfer arrangement increases the duration of the time it takes to the amplitude of the degaussing current to decay and, hence, the length of the degaussing interval.

Abstract: A capacitively coupled square wave generator provides a steady state sinusoidal current flow in a deflection winding of a cathode ray tube. The deflection winding, the capacitive coupling and an additional capacitor form a tank circuit which filters out the odd harmonics of the square wave generator to provide a sinusoidal current in the deflection winding to produce bidirectional scanning.