CIRCUIT AND METHOD FOR MEASURING A CURRENT

摘要

Circuits, switches with over-current protection and methods for measuring a current are described herein. A circuit configured to provide a current from a supply voltage to a load includes a first transistor, a second transistor, and a detecting circuit. The first transistor has a larger active area than the second transistor. The detecting circuit is configured to detect a current through the second transistor. A same voltage is applied between a control terminal of the first transistor and a first controlled terminal of the first transistor and is applied between a control terminal of the second transistor and a first controlled terminal of the second transistor. The detecting circuit is coupled to the second controlled terminal of the second transistor and is coupled to the supply voltage.

主权项

1. A circuit, configured to provide a current from a supply voltage to a load, comprising:
a first transistor; a second transistor; and a detecting circuit configured to detect a current through the second transistor; wherein the first transistor has a larger active area than the second transistor; wherein a same voltage is applied between a control terminal of the first transistor and a first controlled terminal of the first transistor and is applied between a control terminal of the second transistor and a first controlled terminal of the second transistor; wherein the detecting circuit is coupled to the second controlled terminal of the second transistor; and wherein the detecting circuit is coupled to the supply voltage.