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US 3,947,723 AGranted
Low power high frequency horizontal deflection amplifier
AssigneeLockheed Missiles & Space Company, Inc.
InventorJames P. Thompson
Life of this patent
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Abstract
A closed loop controlled amplifier operable on low power is disclosed. The amplifier utilizes a relatively slow, high voltage transistor that is saturated during the active sweep and cut off during the retrace. A dampening network is included which operates during the active horizontal deflection time. A current feedback is derived from the horizontal deflection yoke to stabilize and control the amplifier.
Claims6
A control arrangement for controlling the horizontal deflection of a cathode ray display comprising, in combination,
- a controlled amplifier for driving an inductive horizontal deflection yoke means, said amplifier providing both voltage and current amplification,
- switching means with at least one transistor, the emitter of said transistor connected to the output of said controlled amplifier,
- a first circuit network including a first inductor means and a first resistor, said first circuit network connected to a source of positive potential and the collector of said transistor,
- a second circuit network including a first capacitor, said inductive yoke means and a second resistor connected in series, said second circuit network connected to ground and the junction of said first circuit network and the collector of said transistor,
- a feedback network and a damping network, said feedback network and damping network connected between said second circuit network and the input to said controlled amplifier,
2 more elements
Dependencies are inferred from the claim text.