MULTIPLEX VOLTAGE OUTPUT CIRCUIT AND LOGIC GATE CIRCUIT FOR MULTIPLEX VOLTAGE OUTPUT CIRCUIT

摘要

PPROBLEM TO BE SOLVED: To provide a driving circuit suited to low power drive for a portable display and the like by removing a through current, which is probably generated in a driving circuit, at selecting time of output voltages at a multiplex voltage output stage as in the driving circuit of a flat display. PSOLUTION: Two signals, which have the same timing and with which only one phase is reversed, are entered to two logical gates to obtain each logical gate output signal. In the multiplex voltage output circuit, one of multiplex output voltages is selectively generated by driving each gate of two corresponding MOS transistors, which function as switching for the power source voltage, based on the two output signal. The sizes of PMOS and NMOS, which constitute the logical gate, are made different with each other, and in the multiplex voltage output circuit, the two gate outputs are not put under the same condition of low L or high H, by advancing or delaying a raise edge and/or a decline of the output signal and the like. PCOPYRIGHT: (C)2006,JPO&NCIPI