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:
Oct. 08, 1991
Filed:
Apr. 27, 1989
Kazuhiko Kasai, Tokyo, JP;
Kabushiki Kaisha Toshiba, Kanagawa, JP;
Abstract
A digital-to-analog converter which has an input terminal for receiving first and second digital signals and a reference voltage generating circuit for establishing a reference voltage at a control terminal of a reference voltage transistor. The digital-to-analog converter also includes first and second current sources which each include a current source transistor having a control terminal connected to the control terminal of the voltage reference transistor. A first switch connected in the conduction path of the first current source transistor selectively allows current to flow to the output terminal and a second switch connected in the conduction path of the second current source transistor selectively allows a second current to flow to the output terminal.