D.C. restore for a remote video interconnect

Details D.C. restore for a remote video interconnect D.C. restore for a remote video interconnect

1990-03-30

1991-07-09

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

358 34, H01J 2952

Patent

active

050308963

ABSTRACT:
A d.c. restore circuit for a multi-channel remote video interconnect circuit is situated at the output end of the interconnect circuit for minimum capacitive loading and to reduce power requirements for a video driver at the input end of the interconnect circuit. A resistor/diode voltage divider network is coupled between the output of the interconnect circuit and the cathode or grid of a CRT, with a capacitor in series with the output of the interconnect circuit to block any d.c. component of the video signal from the video driver. A fixed voltage is applied at one end of the divider network and a variable current source is coupled to the other end. The current from the current source determines the d.c. potential at the cathode or grid.

REFERENCES:
patent: 3946275 (1976-03-01), Marino
patent: 4722006 (1988-01-01), Kimura et al.
patent: 4876484 (1989-10-01), Mitchell et al.

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