Current source to drive a light source in an optical sensor...

Details Current source to drive a light source in an optical sensor... Current source to drive a light source in an optical sensor...

H - Electricity

05

B

H05B 37/02 (2006.01) G01B 11/00 (2006.01)

Patent

CA 2754733

A current source circuit to drive a light source in an optical sensor system is disclosed. The current source includes an inductor connected in series with a resistor, and a diode coupled in parallel with the inductor and resistor. The current source is configured to receive a regulated direct current (DC) voltage and to provide the current through the inductor to the light source when a switch is closed, and to divert current through the inductor to the diode when the switch is open.

La présente invention concerne un circuit de source de courant servant à exciter une source lumineuse dans un système de capteur optique. La source de courant comprend une bobine d'induction connectée en série à une résistance et une diode couplée en parallèle à la bobine d'induction et à la résistance. La source de courant est conçue pour recevoir une tension de courant continu (CC) régulé et pour envoyer le courant par la bobine d'induction à la source lumineuse lorsqu'un commutateur est fermé et pour dévier le courant par la bobine d'induction vers la diode lorsque le commutateur est ouvert.

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