Sawtooth line circuit for a cathode ray tube
OwnerJozef Johannes Maria Hulshof, Johannes Ludovicus Maria Verheesinventors
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Abstract
A circuit arrangement is described for generating a sawtooth current in a cathode ray tube deflection coil. The circuit arrangement has a first and a second multiresonant section. The sections are arranged in series. The cathode ray tube deflection coil is part of the first section. The second section has an inductor. Each section provides a trace period in which the sawtooth current is generated in the cathode ray tube deflection coil and a retrace period in which flyback of the sawtooth current is provided. The circuit arrangement further has a current control circuit coupled to the inductor for controlling the course of the sawtooth current.
Claims8
A circuit arrangement (1) for generating a sawtooth current (Il1, Il2) in a cathode ray tube deflection coil (L1), the circuit arrangement (1) comprising a first (I) and second (II) multiresonant section arranged in series, the cathode ray tube deflection coil (L1) in series with a trace capacitor (Ct) being comprised in the first section (I), and the second section (II) comprising an inductor (L2), each section (I, II) providing a common truce period (Tr) and a common retrace period (Rt) to provide a flyback of said sawtooth current (Il1, Il2), and the circuit arrangement (1) comprising a current control circuit (2) being directly coupled to the inductor (L2), and being without a second trace capacitor coupled from said inductor (L2) to ground, the current control circuit controlling the course of the sawtooth current (Il1, 1l2).
A display device comprising a cathode ray tube, the display device comprising a circuit arrangement (1) for generating a sawtooth current (Il1, Il2) in a cathode ray tube deflection coil (L1) coupled to a cathode ray tube, the circuit arrangement (1) comprising a first (I) and a second (II) multiresonant section arranged in series, the cathode ray tube deflection coil (L1) connected in series with a trace capacitor (Cr) being comprised in the first section (1), and the second section (II) comprising an inductor (L2), each section (I, II) providing a common trace period (Tr) and a common retrace period (Rt) to provide a flyback of said sawtooth current (Il1, Il2), and the circuit arrangement (1) comprising a current control circuit (2) being directly coupled to the inductor (L2) without another trace capacitor connected between said inductor (L2) and ground, the control circuit controlling the course of the sawtooth current (Il1, Il2).
Dependencies are inferred from the claim text.