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US 4,281,275 AGranted
Circuit for driving deflection coil
AssigneeElliott Brothers (London) Limited
InventorsPeter Chapman, Martin W. Redfern
Life of this patent
Estimating the term…
Abstract
A circuit for driving a deflection coil comprising a capacitor (3) in series with the coil (2), a circuit (1) which drives a saw-tooth waveform current through the coil and capacitor, and a switchable resonant circuit (5, 6, 7, 8, 9) which generates across the capacitor a saw-tooth waveform voltage equal and opposite to the voltage drop attributable to a resistive component (4) of the capacitor/coil series circuit, thereby to effect loss correction.
Claims7
A circuit for driving a deflection coil comprising:
- a capacitor forming a series L-C circuit with the deflection coil;
- a drive circuit to produce a current of sawtooth waveform through the series L-C circuit;
- and a switchable resonant circuit connected across the capacitor of the said series L-C circuit to produce across said capacitor a saw-tooth waveform voltage component which is substantially equal and opposite to the voltage drop attributable to a resistive component of the L-C circuit.
Dependencies are inferred from the claim text.