Patent ID: 8655287
Filing Date: 2014-02-18
Classification: H03K,H04M

Abstract:
1. A switch control circuit comprising: level shifters connected to a switch circuit to convert voltage levels of control signals; a negative potential generating circuit connected to the level shifter, to generate a negative potential; a negative potential output line supplying the negative potential to the level shifter; and a negative potential output line control circuit configured to control the potential of the negative potential output line, wherein the negative potential output line control circuit comprises: a power-supply setting circuit outputting a signal which becomes High level after a predetermined period is passed from rise of a power-supply potential; an inverter inverting the output signal; a first capacitor connected between an output of the inverter and the negative potential output line; and a negative potential initialization circuit connected to the negative potential output line, to set the negative potential output line to a predetermined voltage level within the predetermined period.