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:
Nov. 01, 2016
Filed:
Sep. 29, 2015
Analog Devices, Inc., Norwood, MA (US);
Khiem Quang Nguyen, Tewksbury, MA (US);
Analog Devices, Inc., Norwood, MA (US);
Abstract
Embodiments of the disclosure provide improved mechanisms for applying DEM techniques to a DAC comprising a plurality of cells. Disclosed mechanisms include keeping track of the amplitude of input digital signal over a certain time period to determine a range of amplitudes of a portion of the input signal, and, when converting the digital values of that portion to analog values and applying a particular DEM technique, limiting the number of DAC cells on which a DEM technique is applied only to a number that is necessary for generating the analog output corresponding to the tracked portion, which number is determined based on the tracked amplitudes and could be smaller than the total number of DAC cells. In this manner, mismatch error may be reduced for smaller input signal amplitudes. Whenever possible, unused DAC cells may be put into a power saving mode, providing the advantage of reduced power consumption.