Patent ID: 8674745
Filing Date: 2014-03-18
Classification: H01L,H03K

Abstract:
1. A semiconductor integrated circuit device comprising: a first circuit supplied with a first power supply voltage which outputs a first pair of complementary signals and receives a first signal, each of the first pair of complementary signals and the first signal having a first amplitude corresponding to the first power supply voltage; a second circuit supplied with a second power supply voltage via a first switch which outputs a second pair of complementary signals and receives a second signal, each of the second pair of complementary signals and the second signal having a second amplitude corresponding to the second power supply voltage, wherein the second power supply voltage is lower than the first power supply voltage; a control circuit for controlling the first switch; a first level-up level conversion circuit which receives the second pair of complementary signals and outputs the first signal; and a first level-down level conversion circuit which receives the first pair of complementary signals and outputs the second signal.