SEMICONDUCTOR INTEGRATED CIRCUIT

摘要

PURPOSE: A semiconductor integrated circuit is provided to reduce a high frequency power source sharing phenomenon by a short-circuited coupling part in high frequency band. CONSTITUTION: A first power source line receives first ground voltage. A second power source line(VL2) receives second ground voltage(VSSQ). A third power source line receives first power source voltage. A coupling stage(7) comprises an MOS(Metal Oxide Semiconductor) transistor in which a gate is connected to the third power source line, a drain is connected to the second power source line, and a source is connected to the first power source line. A pre-driver(3) drives a pull-down signal and a pull-up signal by receiving data synchronized to a clock signal. The pre-driver is operated by receiving second power source voltage and the second ground voltage.