The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 17, 1998
Filed:
Oct. 08, 1996
Applicant:
Inventor:
Kazuyuki Kikuchi, Tokyo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03M / ;
U.S. Cl.
CPC ...
341144 ; 341154 ;
Abstract
A digital-to-analog converter includes a ladder circuit and transistors. A control voltage generating circuit is coupled to the transistors in a feedback configuration to control current flowing through the transistors. The control voltage generating circuit includes an operational amplifier coupled to a transistor. Using the control voltage generating circuit, the digital-to-analog converter of the present invention produces an analog output voltage resistant to variation in the DC forward current gain of the transistors.