Degaussing circuit

Details Degaussing circuit Degaussing circuit

1993-01-08

1994-10-18

Pellinen, A. D.

Electricity: electrical systems and devices

Demagnetizing systems and processes

361149, H01F 1300

Patent

active

053573986

ABSTRACT:
A degaussing circuit has a degaussing coil, an oscillator, amplifiers, a bias source, a capacitor, a switch and a time period controller. The oscillator supplies high frequency alternating currents which are amplified by the amplifiers to drive the degaussing coil. The bias source and capacitor activate the amplifiers. The capacitor applies a gradually reducing bias to the amplifiers. The switch controls the charging and discharging of the capacitor and thus causes the application of the gradual reducing bias to the amplifiers. The time period controller regulates the operation period of the switch and, therefore, the charge and discharge of the capacitor.

REFERENCES:
patent: 3433993 (1969-03-01), Norley
patent: 4135219 (1979-01-01), Yoshizawa et al.
patent: 4153858 (1979-05-01), Schylander
patent: 4218722 (1980-08-01), Yoshizawa
patent: 4384313 (1983-05-01), Steingroever et al.
patent: 4829214 (1989-05-01), Lendaro
patent: 4887184 (1989-12-01), Armond
patent: 4950955 (1990-08-01), Hoover et al.

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