Abstract: A switching regulator for a television display apparatus includes a controllable switch coupled to a source of unregulated direct voltage. The switch is operated at the deflection rate to produce a pulsating direct voltage. A filter including a series choke and a shunt capacitor has its input coupled to the switch for filtering the pulsating direct voltage to form a direct voltage for operating the television display apparatus. An integrator has its input coupled to the input of the filter for averaging the pulsating direct voltage.A feedback voltage control circuit has an input coupled to the integrator and an output coupled to a control electrode of the controllable switch for maintaining the average of the pulsating direct voltage constant over a wide range of unregulated direct voltage and load current variations.

Abstract: A source of unregulated direct voltage is commutated at the horizontal rate by a two-transistor switching regulator and applied across a transformer primary winding. The duty cycle of the alternations is controlled to maintain the peak-to-average value of a first portion of the alternations at a constant value. A rectifier serially coupled with a capacitor is coupled across the secondary winding of the transformer and produces a direct voltage across the capacitor from the first portion of the alternations. The junction of the rectifier and secondary winding is grounded. A television horizontal output transistor has its emitter grounded and its collector coupled through an inductance to the other end of the rectifier. A constant energy is stored in the inductance during each deflection cycle for application to the horizontal output stage. The horizontal output transistor is one of the two regulator transistors.