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:
Sep. 16, 2003
Filed:
Apr. 25, 2002
Applicant:
Inventor:
Alexander Bugeja, Acton, MA (US);
Assignee:
Engim, Inc., Acton, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03M 1/66 ;
U.S. Cl.
CPC ...
H03M 1/66 ;
Abstract
A method for implementing segmented digital-analog converters (DACs) operating in the current mode matches the time constants in the most-significant-bit (MSB) segments to the time constants in the (LSB) least-significant-bit segments, and any intermediate-significant-bit (ISB) segments. The method can be implemented using the simple addition of capacitances or the resizing of transistors in the circuit at appropriate points. The resulting DAC exhibits high dynamic linearity and spurious free dynamic range (SFDR).