Deflection amplifier

Details Deflection amplifier Deflection amplifier

1979-02-01

1981-04-14

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

H01J 2970, H01J 2976

Patent

active

042622352

ABSTRACT:
An improved drive for the deflection coil of a cathode ray tube. A first deflection, low-power supply means drives the deflection coil causing the electron beam to scan the face of the tube. A separate second deflection, high-power supply means drives the deflection coil causing retract of the beam. A switch means including a mono-stable multi-vibrator produces an output pulse of selected duration which controls a transistor switch connecting the second supply means to the deflection coil during the retrace cycle. A source of sync signals connected to the multi-vibrator produces the pulse input signals necessary to drive the multi-vibrator thereby controlling the timing of the transistor switch for causing retrace. The use of a separate second high power supply permits rapid retrace, improved power supply matching and minimal heat loss.

REFERENCES:
patent: 3983452 (1976-09-01), Bazin
patent: 4023069 (1977-05-01), Peer
patent: 4054816 (1977-10-01), Keidl
patent: 4119891 (1978-10-01), Soldner et al.

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