ACUPUNCTURE POINTS STIMULATION FOR ASSISTING ADDICTION TREATMENT

摘要

PURPOSE:To limit a rush current by coupling a current line from the source terminal of an electric field effect type transistor (FET) and a current line which flows into a gate terminal by means of an AC machine. CONSTITUTION:In the AC machine 10, one end of a primary winding is connected to the source terminal of the FET 1 and the source current of the FET 1 flows. One end of a secondary winding is connected to the gate terminal of the FET 1. When a current flows in the primary winding from the source terminal of the FET 1, a voltage inducted by the secondary winding occurs in a direction for dropping a gate voltage. When the large pulse-like rush current is to flow in the primary winding of the AC machine 10, the gate voltage of the FET 1 drops and an apparent resistance between a drain and a source is enlarged, whereby the peak value of the rush current flowing from an input side when an input voltage Vi suddenly rises can be controlled.