Electron beam deflection circuit
AssigneeSony Corporation
InventorShigeo Tanaka
Life of this patent
Estimating the term…
Abstract
A vertical deflection circuit for television receivers or the like which has an output stage of single-ended push-pull amplifier configuration is provided with a power supply circuit which includes a rectifying circuit connected between a D.C. voltage source and the output stage for rectifying an external A.C. voltage fed thereto to produce an additional D.C. voltage. The power supply circuit supplies a first D.C. voltage from the D.C. voltage source to the output stage during the first half of a trace or scanning period and supplies a second D.C. voltage, obtained by adding the additional D.C. voltage to the D.C. voltage from the D.C. voltage source, to the output stage during the second half of the trace or scanning period and during the retrace period.
Claims9
A vertical deflction circuit comprising:
- an output circuit including first and second transistors connected to form a single-ended push-pull amplifiers having an output, an operating voltage terminal connected to said first transistor and adopted to receive an operating voltage for said transistors, a vertical deflection coil connected to said output of the single-ended push-pull amplifier, and means for applying sawtooth wave input signals to said amplifier so as to cause sawtooth wave currents to flow in said vertical deflection coil;
- and
- a power supply circuit for supplying said operating voltage to said terminal including D.C. voltage source means for supplying a substantially constant D.C. voltage, A.C. voltage source means for supplying an A.C. voltage, and rectifier means connected with said D.C. and A.C. voltage source means for rectifying said A.C. voltage and producing an additional D.C. voltage which is added to said constant D.C. voltage only during a predetermined portion of each wave of said sawtooth wave input signals for causing the power supply circuit to provide a resulting first operating voltage at said terminal during only said predetermined portion of each wave of the input signals, said rectifier means being inoperative to rectify said A.C. voltage for causing the power supply circuit to apply to said terminal a second operating voltage corresponding substantially to said constant D.C. voltage during the remaining portion of each wave of said sawtooth wave input signals.
Dependencies are inferred from the claim text.