Patent ID: 6765774
Filing Date: 2004-07-20
Classification: H02H

Abstract:
A high impedance insertion system, comprising:a first storage element; a rectifier for receiving an AC input and charging the first storage element, wherein the rectifier cyclically alternates between a high impedance state and a low impedance state in response to cycles of the AC input; a bi-state device for coupling between the first storage element and a load capable of producing EMI, wherein the bi-state device is configured to switch between a high impedance state and a low impedance state, and a controller for driving the bi-state device to switch to either the high impedance state or the low impedance state, the controller configured to drive the bi-state device such that, when the rectifier is in the low impedance state, the bi-state device is in the high-impedance state so as to electrically isolate the AC input from the EMI produced by the load.