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:
Aug. 10, 1999
Filed:
Jul. 02, 1997
Yasuyuki Nakamura, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A current output digital-to-analog conversion circuit for converting a digital signal to an analog signal by supplying a current through an output resistor includes a variable resistance circuit for varying an output resistance in response to an external control signal and a current supplying portion for adjusting a current in response to a gate voltage. The resistance of the resistor in the variable resistance circuit is changed by an external control signal, the current of the current supplying portion is changed by changing the gate voltage, whereby the output current can be changed while keeping an output voltage amplitude constant, and the output voltage amplitude can be changed while keeping the output current constant.