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. 18, 2016
Filed:
Aug. 21, 2014
Qualcomm Incorporated, San Diego, CA (US);
Seyed Arash Mirhaj, Los Angeles, CA (US);
Sameer Wadhwa, San Diego, CA (US);
Dinesh Jagannath Alladi, San Diego, CA (US);
Kentaro Yamamoto, San Diego, CA (US);
Xiaoke Wen, San Diego, CA (US);
Masoud Ensafdaran, San Diego, CA (US);
Weihua Chen, Chandler, AZ (US);
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
Reducing signal dependence for a reference voltage of a CDAC includes: splitting a decoupling capacitor into a plurality of capacitors smaller in size than a size of the decoupling capacitor; isolating at least one of the plurality of capacitors from a sampling buffer coupled to the reference voltage during a conversion phase; and supplying an appropriate amount of charge needed to replenish charge drawn by capacitors in the CDAC at each conversion step using a charge pump to pump in a dummy charge to the CDAC so that resulting configurations of the CDAC draw substantially similar amount of charge for each code change of the each conversion step.