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. 17, 1989
Filed:
Apr. 20, 1988
Tetsuya Kondo, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A current generating circuit for dividing a current (Dynamic Element Matching) in which a portion of a plurality of transistors constituting change-over circuits arranged therein is removed by weighting the transistors for the operating periods thereof, to thereby largely reduce the number of elements, particularly in the case where a large number of bits are processed. Since the number of bits which each current generating circuit can process can be increased, the number of elements can be easily decreased, so that a source voltage can be reduced when the current generating circuits are connected in multiple stages (in a vertical piling). Further, transistors constituting switching circuits are connected in a Darlington configuration to expand the operating range (dynamic range) of the circuit.