Isolator circuit and semiconductor device

Patent metadata

Field	Value
Publication number	US-9030232-B2
Application number	US-201313857185-A
Country	US
Kind code	B2
Filing date	Apr 5, 2013
Priority date	Apr 13, 2012
Publication date	May 12, 2015
Grant date	May 12, 2015

Abstract

An isolator circuit capable of two-way electrical disconnection and a semiconductor device including the isolator circuit are provided. A data holding portion is provided in an isolator circuit without the need for additional provision of a data holding portion outside the isolator circuit, and data which is to be input to a logic circuit that is in an off state at this moment is stored in the data holding portion. The data holding portion may be formed using a transistor with small off-state current and a buffer. The buffer can include an inverter circuit and a clocked inverter circuit.

First claim

What is claimed is:

1. An isolator circuit comprising:
a first terminal;
a second terminal;
a first transistor;
a second transistor;
a first buffer; and
a second buffer,
wherein the first terminal is electrically connected to one of a source and a drain of the first transistor,
wherein the first terminal is electrically connected to an output terminal of the second buffer,
wherein the other of the source and the drain of the first transistor is electrically connect…

Assignees

• Semiconductor Energy Lab

Inventors

• Yoneda Seiichi

Classifications

• H10D88/00 Primary

  Electricity · mapped topic

• H10D86/201

  Electricity · mapped topic

• H10D84/01 Primary

  Electricity · mapped topic

• H01L27/0605 Primary

  Electricity · mapped topic

• H01L27/0688

  Electricity · mapped topic