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:
Jul. 14, 1998
Filed:
Oct. 18, 1996
Toshio Ikuta, Handa, JP;
Seiichirou Otake, Hazu-gun, JP;
Denso Corporation, Kariya, JP;
Abstract
A digital-to-analog converter includes an R-2R resistive ladder network having resistors connected in a ladder form in correspondence with a number of bits of a digital input signal. The R-2R resistive ladder network has an output terminal. A pair of positive and negative dc-power-supply terminals are connected to the R-2R resistive ladder network. Currents flowing between the R-2R resistive ladder network and one of the positive and negative dc-power-supply terminals are controlled in response to the bits of the digital input signal to generate an analog voltage signal at the output terminal of the R-2R resistive ladder network. The analog voltage signal depends on the digital input signal. A first resistor and a second resistor located outside the R-2R resistive ladder network are connected in series between the positive and negative dc-power-supply terminals. A third resistor located outside the R-2R resistive ladder network is connected between the output terminal of the R-2R resistive ladder network and the second resistor located outside the R-2R resistive ladder network. A conversion output terminal is connected to a junction between the second and third resistors located outside the R-2R resistive ladder network.