Bipolar tracking current source/sink with ground clamp

G - Physics – 05 – F

Patent

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Details

G05F 1/46 (2006.01)

Patent

CA 2132226

A system for controlling a bipolar constant current when the current is being supplied to an active or reactive element. Tracking is extended to either sink or source modes. A switchable driven ground state is also provided. An operational amplifier buffer senses the voltage amplitude at the junction of the system output and active or reactive load element. This relatively low impedance output is summed or offset with a regulated voltage. This level is again buffered to present a low output impedance and series connected with a current limiting resistor.

L'invention est un système servant à commander un courant constant fourni à un élément actif ou réactif. Cette commande peut être effectuée sur un courant acheminé à un puits ou sur un courant provenant d'une source. Le système comporte également une mise à la masse commutable. Un tampon à amplificateur opérationnel détecte l'amplitude de la tension à la jonction de la sortie du système et d'une charge active ou réactive. Cette tension de sortie à impédance relativement basse est sommée avec une tension stabilisée. La tension résultante est de nouveau appliquée à un tampon à faible impédance de sortie connectée en série avec une résistance limitrice de courant.

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