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:
Jul. 19, 2018
Applicant:
Qualcomm Incorporated, San Diego, CA (US);
Inventors:
Rajesh Anantharaman, Santa Clara, CA (US);
Ajay Taparia, San Jose, CA (US);
Shunxi Wang, Palo Alto, CA (US);
Assignee:
Qualcomm Incorporated, San Diego, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 3/044 (2006.01); G06F 3/041 (2006.01); G06F 3/047 (2006.01); G06F 1/32 (2019.01);
U.S. Cl.
CPC ...
G06F 1/32 (2013.01); G06F 3/0446 (2019.05); G06F 3/04182 (2019.05);
Abstract
Aspects of the disclosure are directed to self-capacitance measurement and cancellation. In accordance with one aspect, a self-capacitance cancellation circuit includes an input amplifier, wherein the input amplifier comprises a non-inverting input, an inverting input and an output; a coherent current source coupled to the inverting input; a feedback network coupled to the output; and a capacitance coupled to the inverting input.