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:
Apr. 13, 2021
Filed:
Sep. 20, 2019
Applicant:
Qualcomm Incorporated, San Diego, CA (US);
Inventors:
Yi-Hung Tseng, San Diego, CA (US);
Karthik Nagarajan, Cupertino, CA (US);
Assignee:
QUALCOMM Incorporated, San Diego, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03M 1/66 (2006.01); H04B 1/40 (2015.01); H03L 7/099 (2006.01); H03L 7/093 (2006.01);
U.S. Cl.
CPC ...
H03M 1/66 (2013.01); H03L 7/093 (2013.01); H03L 7/099 (2013.01); H04B 1/40 (2013.01);
Abstract
A digital to analog converter (DAC) includes a plurality of DAC transistor devices having an input side configured to be selectively coupled to a system voltage based on a digital input signal and an output side configured to provide an analog output signal, a plurality of non-DAC transistor devices coupled to the input side of the DAC transistor devices, the non-DAC transistor devices configured as variable resistances, and a control circuit configured to adjust a bias of the non-DAC transistor devices.