Automatic gain control for an infrared source of an automotive e

Details Automatic gain control for an infrared source of an automotive e Automatic gain control for an infrared source of an automotive e

1982-09-27

1984-10-30

Howell, Janice A.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

G01N 2117

Patent

active

044801912

ABSTRACT:
An automatic gain control circuit for driving a low mass infrared source used in an automotive exhaust gas emissions analyzer. A reference spectrum of radiant energy is monitored, demodulated and converted to an error signal to maintain the source at a constant energy output.

REFERENCES:
patent: 3678269 (1972-07-01), Malek
patent: 4016423 (1977-04-01), Meyer

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