Abstract: A drive circuit for a horizontal deflection circuit that is operable at a number of horizontal scan rates includes a pair of transistors coupled in a push-pull arrangement. The voltage supplies for the drive circuit transistors, which provide the forward and reverse drive for the horizontal output transistor, produce voltage levels that are dependent upon the horizontal scanning rate that is selected in order to minimize power dissipation during switching of the horizontal output transistor.

Abstract: A power supply and deflection circuit for a video monitor provides multiple horizontal scan rates. A switch is used to select the desired scan rate. Operation of the switch determines the proper operating voltage level for the horizontal deflection circuit. A zener diode provides a high or low signal in response to the level of the determined operating voltage. The horizontal oscillator frequency and the value of the S-shaping capacitor is determined in response to the high or low signal. The operation of the switch, therefore, provides the necessary circuit parameter changes for each of the horizontal scan rates selected.

Abstract: A video display system operates at a plurality of horizontal scanning rates. A voltage source produces different voltage levels, one of which is selected in response to the horizontal rate selected. A horizontal deflection circuit produces retrace pulses having amplitudes dependent on the scanning rate. A high voltage transformer has a primary winding with a number of taps. The voltage source is connected to one of the taps in response to the horizontal deflection rate selected so that the high voltage level developed across the transformer secondary winding remains substantially constant independent of changes in retrace pulse amplitude.

Abstract: An inverter operated at the horizontal deflection frequency is coupled to a source of direct voltage for developing an alternating voltage at an output terminal of the inverter. A capacitor AC couples the alternating voltage to the primary winding of a power transformer for developing alternating polarity supply voltages across secondary windings of the transformer. A horizontal generator generates scanning current in a deflection winding. A third winding of the transformer applies to the deflection winding the alternating polarity voltage developed across the third winding. The control circuit of the inverter is responsive to a deflection rate voltage synchronized with scanning current generation for synchronizing operation of the inverter so as to enable the third winding to provide substantial linearity correction to the scanning current.

Abstract: A high voltage ultor power supply for a television receiver includes a ferroresonant transformer that is capable of operating over a substantial range of temperature without thereby introducing undesirably large changes in the ultor voltage. The ferroresonant transformer comprises a plurality of windings, a magnetizable core with first and second core sections, and a resonating capacitor. A first of the plurality of windings is wound on the first core section and coupled to a source of exciting current for generating magnetic flux in the core. A second of the plurality of windings is wound on the second core section. The varying magnetic flux that links the second winding generates an alternating polarity output voltage across that winding. To regulate the output voltage, the capacitor is coupled to one of the plurality of windings and develops a circulating current to produce a magnetic flux that aids in magnetically saturating the second core section.

Abstract: A switching regulator for regulating an input voltage having an alternating current component. Closure of the regulator switch is determined by a phase shifted switching signal obtained from a control network. In normal operation a varying bias signal coupled to the control circuit varies the phase shift of the switching signal to vary the instant of regulator switch closure. During startup, a capacitance coupled to the control circuit and to the input voltage provides an additional bias signal to delay the switching signal to prevent regulator switch closure during the peak magnitude of the alternating current input voltage component to thereby limit the peak inrush current in the regulator circuit.

Abstract: A television kinescope deflection circuit having improved linearity includes a deflection winding coupled in series with a first capacitor. A deflection switch and retrace capacitor are coupled across the serial combination of the deflection winding and first capacitor. The first capacitor responds to the deflection current to form a linearizing signal which modifies the flow of deflection current to provide S-correction. The linearity correction is improved by a series-resonant circuit coupled in parallel with the first capacitor and tuned to the second harmonic of the deflection frequency.

Abstract: A wide-angle kinescope deflection arrangement using an S-capacitor for correction over a major central portion of the scan has a residual compression of the display at the extremes of the scan. A saturable reactor is coupled in series with the deflection winding and saturates near the extremes of the scan due to the large deflection current. The reduced impedance of the reactor in series with the deflection winding causes the time rate of change of the deflection current to increase at the scan extremes and thereby linearizes the display.