DA converter

Patent metadata

Field	Value
Publication number	US-8994566-B2
Application number	US-201313765325-A
Country	US
Kind code	B2
Filing date	Feb 12, 2013
Priority date	Feb 22, 2012
Publication date	Mar 31, 2015
Grant date	Mar 31, 2015

Abstract

There is provided A DA converter in which the N current switch cells each include: a current source having one end connected to a first power source; and first and second switch transistors differentially operating each other, each having a control terminal receiving a digital signal, the first combining node combines a current output from the first switch transistor in each current switch cell, the second combining node combines a current output from the second switch transistor in each current switch cell, the first output impedance element has ends connected to the first combining node and a second power source, the second output impedance element has ends connected to the second combining node and the second power source, the controller controls the current source in each current switch cell to reduce variation in amount of a current flowing from the first power source.

First claim

The invention claimed is:

1. A DA converter comprising:
N (N is an integer of 1 or more) current switch cells each comprising:
a current source comprising one end connected to a first power source configured to generate a controllable current; and
a first switch transistor and a second switch transistor differentially operating each other, each comprising one end connected to another end of the current source and a control terminal configured to receive a digital signal;

a…

Assignees

• Toshiba Kk

Inventors

• Shiraishi Kei
• Ueno Takeshi
• Itakura Tetsuro

Classifications

• H03M1/66 Primary

  Electricity · mapped topic

• H03M1/742

  Electricity · mapped topic

• H03M1/0845 Primary

  Electricity · mapped topic