Seiko Epson Corporation

Hiroaki Nomizo

Hiroshi Kiya

Tsuyoshi Tamura

Keisuke Hashimoto

Atsushi Ishikawa

Shigeaki Kawano

Hidenori Yato

Nobuyuki Oikawa

A power supply switching circuit that selects one power supply potential from among a plurality of power supply potentials. This power supply switching circuit is provided with a transistor QPthat is connected between an input node Nand node Nand has a back gate connected to node N, a transistor QPthat is connected between node Nand output node Nand has a back gate connected to node N, a transistor QPthat is connected between input node Nand node Nand has a back gate connected to node N, a transistor QPthat is connected between the node Nand Nand has a back gate connected to node N, and a control signal generation unit that sets a group of transistors QPand QPand a group of transistors QPand QPto a conduction state and sets the other to a non-conduction state.

Power supply switching circuit and electronic device

An integrated circuit device includes: a driving voltage output unit that outputs a driving voltage supplied to a segment electrode of an electro-optical panel; a display data storage unit that stores display data; and a driving waveform information output unit that outputs driving waveform information when a display state of the segment electrode is changed from a first display state corresponding to first display data to a second display state corresponding to second display data, wherein the driving voltage output unit outputs the driving voltage specified by the first display data and the second display data from the display data storage unit, and the driving waveform information from the driving waveform information output unit.

Integrated circuit device and electronic apparatus

An integrated circuit device includes an I/O circuit which buffers and outputs an input signal D from a pad when an enable signal ENB is set at a second voltage level, a circuit block to which an output signal from the I/O circuit is input, and a malfunction prevention circuit which outputs to the circuit block an output signal QP of which a voltage level is set by a first power supply VDDC in a period Tin which the signal ENB is set at a first voltage level and a period Tincluding a period in which the signal ENB changes from the first voltage level to the second voltage level, and outputs to the circuit block the output signal QP corresponding to an output signal QI from the I/O circuit in a period Tin which the signal ENB is set at the second voltage level.

Integrated circuit device and electronic instrument

Growing community of inventors

Ina, Japan

Hiroaki Nomizo