Patent ID: 8169252
Filing Date: 2012-05-01
Classification: H01L,H02J,H03K,Y02E

Abstract:
1. A low voltage drop unidirectional electronic valve, comprising: a first terminal; a second terminal; a first electronically controlled switch coupled between said first terminal and said second terminal; and a first charge pump, said first electronically controlled switch responsive to an output of said first charge pump; and a start up unit coupled to said first terminal and arranged to provide initial power to said first charge pump responsive to a voltage potential at said first terminal being greater than a voltage potential at said second terminal by at least a first predetermined value; said first charge pump in a closed loop arrangement with said first electronically controlled switch so as to set, and maintain, said voltage potential at said first terminal greater than the voltage potential at said second terminal by a second predetermined value without requiring refresh, said second predetermined value less than said first predetermined value.