Resonant magnetic deflection circuit

Details Resonant magnetic deflection circuit Resonant magnetic deflection circuit

1982-12-13

1985-11-19

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315395, H01J 2970

Patent

active

045544891

ABSTRACT:
A resonant magnetic deflection circuit is disclosed for reducing a retrace period of an electron beam scanning within a cathode ray tube (CRT) apparatus. Opposite polarity flyback voltage pulses occur at both ends of a deflection coil. As a result, an effective retrace voltage appearing across the deflection coil is approximately doubled, thereby reducing the retrace period of the electron beam scanning within the CRT apparatus. One end of the deflection coil is connected to a reference level source through a first parallel circuit and an S-correction capacitor, the other end thereof being connected to the reference level source through a second parallel circuit. The first and second parallel circuits comprise switching devices, damper diodes and retrace capacitors. Moreover, both ends of the deflection coil are connected to a power supply through a flyback transformer.

REFERENCES:
patent: 3988637 (1976-10-01), Boekhorst
patent: 4464612 (1984-08-01), Teuling
Electronic Engineers Handbook, Sec. 20-71 through 20-73, pp. 20-52 to 20-53, FIGS. 20-53.

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