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. 16, 2007
Filed:
Jan. 03, 2006
Dinesh Jain, Bangalore, IN;
Dinesh Jain, Bangalore, IN;
Analog Devices, Inc, Norwood, MA (US);
Abstract
A current driven DAC architecture uses a single resistance string arranged to have a cyclic configuration and a plurality of nodes, one of the nodes being connected to a known potential, e.g., ground potential, and at least two current sources connected to selected ones of said nodes through operable switches, and an output connected to a selected one of said nodes. In one modification, 2LSB (least significant bit) voltage levels are generated as outputs from 2cyclic string resistors and two current sources. In another modification, spurious-free resolution of (2n−2) bits and (2n−1) bit resolution with lower SNDR are achieved by using 2resistors and two current sources. In one described embodiment, 2unit impedances in the cyclic string result in 2(n−1) bit resolution. Thus, the single cyclic string of resistances achieves the function of both MSB sub-string and LSB sub-string.