Patent ID: 7355455
Filing Date: 2008-04-08
Classification: G11C,H01L,H03K

Abstract:
1. A semiconductor device comprising: a logic gate constructed of an insulated gate field effect transistor having a first gate insulation film, and receiving a voltage of an internal power node as an operating power source voltage to operate, for processing a signal of a first amplitude; a first switching transistor connected between said internal power node and a first power source node, having a second gate insulation film greater in thickness than said first gate insulation film, and responsive to a switch control signal of a second amplitude larger than said first amplitude to be selectively made conductive for electrically coupling said first power source node and said internal power node; and a second switching transistor different in conductivity from said first switching transistor, connected between said internal power node and said first power source node, having a gate insulation film the same in thickness as said second gate insulation film thickness, and rendered selectively conductive in a common phase with said first switching transistor in response to said switch control signal.