Mitsubishi Denki Kabushiki Kaisha

Kabushikikaisha Tokyo Keiki

Mitsuo Nakayama

Isao Masuzawa

Toshio Miyayama

Yoshiharu Nakao

Mikio Kyomasu

Koichi Nishimura

A marine automatic steering apparatus for setting a desired course in a digital fashion is disclosed, in which a course deviation which is a difference between a set course and a ship's heading is indicated in an analog manner on a course deviation indicator whose zero point is set at the position corresponding to the lubber line of a steering repeater card.

Marine automatic steering apparatus

A memory cell formed of two serially connected MOS transistors one of which has a floating gate is connected to a series combination of a Y address MOS transistor, a readout selection MOS transistor and an MOS transistor disposed in an output buffer circuit across two DC sources. A writing selection MOS transistor is connected across the series combination of the last-mentioned two transistors. The Y address MOS transistor, the readout selection MOS transistor, the output buffer MOS transistor and the writing selection MOS transistor are all operated in the triode region with V.sub.G -V.sub.TH &gt;V.sub.D and at least one of these MOS transistors has a channel conductivity type different from the channel conductivity type of the memory cell MOS transistors.

Semiconductor memory device

Growing community of inventors

Itami, Japan

Mitsuo Nakayama