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:
Jun. 21, 2016
Filed:
Mar. 12, 2015
Apple Inc., Cupertino, CA (US);
Wenbo Liu, Santa Clara, CA (US);
Raman S. Thiara, San Jose, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
In some embodiments, a digital-to-analog converter (DAC) system includes an output segment, a main branch, first and second edge segments, and a sub-segment. The output segment includes secondary switches that selectively connect conductive paths to an output. The main branch includes unit resistance elements, each including a resistor and a switch. The first and second edge segments each include a respective group of secondary switches that selectively connect a respective conductive path to a unit resistance element. The sub-segment includes terminal resistors connected to at least one conductive path and includes main switches that selectively connect respective terminal resistors to the unit resistance element. The main switches and the unit resistance element switches use a single switch design. The DAC system may have an improved differential non-linearity (DNL), as compared to a DAC system that does not include the unit resistance element switches or the first and second edge segments.