Oki Semiconductor Co., Ltd.

Oki Electric Industry Co., Ltd.

Chikashi Fuchigami

Masakuni Kawagoe

Yoshio Iihoshi

Tsutomu Kato

Shoji Nitawaki

Hidetoshi Ikeda

A semiconductor integrated circuit has an output terminal connected to an external load, an internal signal line by which the output terminal is connected to an internal node, and a voltage generator that outputs a voltage to the internal node, for output through the internal signal line and the output terminal to the external load. A voltage attenuating element is connected to the internal signal line to attenuate voltage swings on the internal signal line. A limiting circuit is connected to the internal node to limit the voltage at the internal node to a predetermined range. Moderate voltage swings caused by external electromagnetic interference are kept within the predetermined range by the voltage attenuating element, so that the limiting circuit does not operate and the average output voltage is not changed.

LCD driving circuit with ESD protection

There is provided a semiconductor device including: a field effect transistor that is provided with a gate region, a drain region and a source region and that is formed on a substrate; a circuit region that is formed on the substrate so as to be electrically isolated from the field effect transistor; a first guard ring that is formed in a ring shape encircling the field effect transistor and that includes an internal resistance; and a second guard ring that is formed in a ring shape encircling the circuit region, that forms a capacitance between the second guard ring and the gate region by capacitive coupling with the gate region, and that includes an internal resistance.

Semiconductor device

The present invention is a semiconductor integrated circuit capable of reducing a cross talk noise produced between data buses. A typical semiconductor integrated circuit of the present invention comprises a plurality of data buses which are formed in an insulating film on a semiconductor substrate and arranged substantially in parallel with one another and an extension portion extended from a given data bus of the plurality of data buses wherein the extension portion is spaced away from an adjacent data bus.

Growing community of inventors

Miyazaki, Japan

Chikashi Fuchigami