Temperature compensated drive circuit for CRT G2 grid

Details Temperature compensated drive circuit for CRT G2 grid Temperature compensated drive circuit for CRT G2 grid

1985-12-11

1987-02-24

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315383, H01J 2952

Patent

active

046459880

ABSTRACT:
A temperature compensated G2 grid drive circuit for use with a video display having a high voltage section supplying a high voltage signal to a cathode, filament and G2 grid of a CRT, wherein the high voltage section has a negative temperature coefficient, includes an input terminal for receiving the high voltage signal and a temperature compensating circuit coupled between the input terminal and the G2 grid of the CRT. The temperature compensating circuit is characterized as having a slightly positive temperature coefficient for maintaining the brightness of the video display substantially constant by driving the G2 grid for compensating for variations with temperature in the high voltage signal supplied to the cathode, filament and G2 grid.

REFERENCES:
patent: 3562578 (1971-02-01), Takahashi
patent: 3796912 (1974-03-01), Funston
patent: 4283663 (1981-08-01), Miyoshi et al.
patent: 4300074 (1981-11-01), Diddens et al.

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