Monitoring circuit for a light emission device

Details Monitoring circuit for a light emission device Monitoring circuit for a light emission device

1991-07-24

1993-05-04

Pascal, Robert J.

Electric lamp and discharge devices: systems

With signal, indicator, or alarm

315291, 315307, 340664, 324123R, H01J 160, G05F 100, G08B 2100, G01R 130

Patent

active

052085139

ABSTRACT:
There is disclosed a monitoring circuit for a light emission device comprising; conversion circuit for converting a current flowing through a light emission device when a drive signal is applied thereto a voltage; shift adjustment circuit for producing shift adjustment signal of a variable output level; and a feedback type amplification unit for amplifying the output voltage of the conversion circuit to produce a monitor signal; wherein amplification unit includes gain control circuit for controlling gain of said amplification unit; the shift adjustment signal is supplied to a feedback loop of the amplification unit.

REFERENCES:
patent: 3566266 (1971-02-01), Bloom
patent: 3705316 (1972-12-01), Burrous et al.
patent: 3781693 (1973-12-01), Ford
patent: 4292606 (1981-09-01), Trimmel
patent: 4374359 (1983-02-01), Missout
patent: 4572987 (1986-02-01), Embrey et al.
patent: 4763334 (1988-08-01), Shimada et al.
patent: 4792701 (1988-12-01), Olon et al.

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