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:
May. 16, 2017
Filed:
May. 13, 2016
Qualcomm Incorporated, San Diego, CA (US);
Edward Robert Deak, Wake Forest, NC (US);
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
Embodiments relate to an improved segmented resistor digital-to-analog converter (DAC) with resistor recycling. An input digital code word is segmented into M most-significant-bits (MSBs) and N least-significant-bits (LSBs). The DAC includes a MSB resistor ladder coupled with a first set of switches and a LSB resistor ladder coupled with a second set of switches. Based on the decoded bit pattern of the LSBs, embodiments are operable to either switch one or more LSB resistors from the bottom of the MSB resistor ladder up to the top, or to switch the LSB resistors from the top of the MSB resistor ladder down to the bottom. In at least one example embodiment, this technique can avoid redundant resistors in the circuit, which can solve mismatch problems due to redundant resistors in the circuit as in prior art solutions, which can lead to problems relating to non-linearity and non-monotonicity.