Circuit arrangement for driving a pulse-modulated infrared-radia

Details Circuit arrangement for driving a pulse-modulated infrared-radia Circuit arrangement for driving a pulse-modulated infrared-radia

1989-06-05

1990-09-04

Berman, Jack I.

Radiant energy

Radiant energy generation and sources

2503381, 250350, 250351, 250504R, H01K 102

Patent

active

049547186

ABSTRACT:
A circuit arrangement for providing a pulse modulated power feed to an infrared radiation source is disclosed. The radiation of the radiation source is detectable by a receiver and the circuit arrangement is improved such that the radiation source is as independent as possible from its radiation characteristics as well as from its thermal characteristics and can deliver a rapid and easily processable measuring signal to the receiver uninfluenced by ambient conditions. For this purpose, the power feed is controllable by means of a control unit during the pulse duration to an upper temperature desired value To and, during the no-pulse period, the power supply is controllable to a lower temperature desired value Tu with the alternation between the two desired values being triggered by a pulse generator connected to a desired value input of the control unit.

REFERENCES:
patent: 2876361 (1959-03-01), Hutchinson
patent: 2931939 (1960-04-01), Christofilos et al.
patent: 3077539 (1963-02-01), Blau, Jr. et al.
patent: 3095506 (1963-06-01), Dewey et al.
patent: 3309881 (1967-03-01), Beerman
patent: 4103174 (1978-07-01), McClatchie et al.
patent: 4620104 (1986-10-01), Nordal et al.
patent: 4754141 (1988-06-01), Mindock
patent: 4803370 (1989-02-01), Eckles

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