Patent ID: 7643321
Filing Date: 2010-01-05
Classification: H02M

Abstract:
1. A current sensing circuit that determines an output current of a bi-directional converter circuit comprising: a current transformer that receives a first current signal and that outputs a second current signal, wherein the first current signal is indicative of the output current and flows through the current transformer in one of a first direction and/or a second direction, and the second current signal is indicative of the first current signal; a current sensing module that receives the second current signal and has a first state and a second state, wherein the current sensing module includes a semiconductor switch, the current sensing module is in the first state when the semiconductor switch is in an ON state, and the current sensing module is in the second state when the semiconductor switch is in an OFF state; a converter control module that simultaneously transitions the first current signal from the first direction to the second direction and transitions the current sensing module from the first state to the second state, and that transitions the current sensing module to the first state after a resetting period.