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. 06, 2010
Filed:
Mar. 24, 2006
Hiroshi Tsuchi, Tokyo, JP;
Junichirou Ishii, Tokyo, JP;
Hiroshi Tsuchi, Tokyo, JP;
Junichirou Ishii, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A digital-to-analog converter of reduced number of elements and smaller area includes a reference voltage generating circuit for outputting a plurality of reference voltages having voltage values that differ from one another; a first logic circuit for outputting the result of a logical operation on a first bit group comprising even-numbered bits (or odd-numbered bits) of an input digital data signal composed of a plurality of bits; a second logic circuit for outputting the result of a logical operation on a second bit group comprising the odd-numbered bits (or even-numbered bits) of the input digital data signal composed of the plurality of bits; a switch group circuit for supplying first and second terminals with voltages selected, inclusive of voltages that are identical, from among the plurality of reference voltages, which are output from the reference voltage generating circuit, in accordance with respective outputs from the first and second logic circuits; and an amplifier circuit for outputting an output voltage that is the result of applying a predetermined operation to voltages supplied to the first and second terminals.