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:
Mar. 22, 2016
Filed:
Jan. 28, 2014
Dialog Semiconductor Gmbh, Kirchheim/Teck-Nabem, DE;
Louis De Marco, Swindon, GB;
Pier Cavallini, Swindon, GB;
Dialog Semiconductor (UK) Limited, London, GB;
Abstract
A method for the design synthesis of an exponential current digital-to-analog (IDAC) using a binary-weighted MSB. The design synthesis involves defining an exponential LSB and exponential MSB current mirrors according to a defined methodology. A method to achieve an exponential current digital-to-analog converter (IDAC) having improved accuracy using a binary-weighted most significant bit (MSB) comprising (1) defining a differential non-linearity (DNL); (2) defining number of LSB bits needed for the targeted DNL with a binary weighted MSB; (3) calculating the number of bits to be used for the binary-weighted MSB to get the desired IDAC base; (4) deriving the minimum current for the Imax; (5) defining the LSB as an exponential current mirror according to the specified relationship for the ILSB; and (6) defining a binary-weighted MSB according to the specified relationship for IMSB.