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.
Type:
Grant
Filed:
March 30, 1990
Date of Patent:
July 9, 1991
Assignee:
Teketronix, Inc.
Inventors:
Matthew A. Porter, Jeffrey C. Bullock, Arville G. Baggao