Circuit arrangement for generating a deflection current through a coil for vertical deflection in a display tube
First Claim
1. Circuit arrangement for generating a sawtooth-shaped deflection current comprising a trace interval and a retrace interval through a coil for vertical deflection in a display tube, comprising means for applying control signals to an output amplifier having output terminal, means for coupling the deflection coil to the output terminal, which coil is divided in two coil halves, characterized in that the circuit arrangement further comprises switching elements by which during the trace interval the coil halves are connected in series with one another and in the retrace interval the two coil halves are each connected between the terminals of a direct-voltage source.
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Accused Products
Abstract
A field deflection output circuit in which the deflector coil is divided in two halves which are connected between the terminals of a direct-voltage source, in series during the trace interval and in parallel in the retrace interval. As a result the retrace interval may be given the correct duration whilst dissipation is kept low so as to enable the circuit arrangement to be integrated in a semiconductor body.
24 Citations
11 Claims
- 1. Circuit arrangement for generating a sawtooth-shaped deflection current comprising a trace interval and a retrace interval through a coil for vertical deflection in a display tube, comprising means for applying control signals to an output amplifier having output terminal, means for coupling the deflection coil to the output terminal, which coil is divided in two coil halves, characterized in that the circuit arrangement further comprises switching elements by which during the trace interval the coil halves are connected in series with one another and in the retrace interval the two coil halves are each connected between the terminals of a direct-voltage source.
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11. A circuit for generating from a direct voltage source a sawtoothed shaped current having trace and retrace intervals through a coil having two halves, said circuit comprising an amplifier having an input means for receiving control signals and an output terminal, means for coupling said coil to said terminal, and switching means for coupling said coil halves in series with one another during said trace interval and for coupling each of said coil halves to said direct voltage source during said retrace interval.
Specification