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. 29, 2021
Filed:
Apr. 09, 2020
Applicant:
Alps Alpine Co., Ltd., Otaku, JP;
Inventor:
David Willis, Murray, UT (US);
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 3/045 (2006.01); G06F 3/041 (2006.01); G06F 3/044 (2006.01);
U.S. Cl.
CPC ...
G06F 3/04166 (2019.05); G06F 3/044 (2013.01);
Abstract
A system for generating a control signal for a capacitive sensor includes a waveform generator configured to generate a digital waveform, a first sigma-delta modulator (SDM) configured to generate a first output corresponding to the control signal based on the digital waveform and first adjustment data and a second SDM configured to generate a second output corresponding to an offset signal based on the digital waveform and second adjustment data. The first SDM is configured to selectively adjust a phase and an amplitude of the control signal and the second SDM is configured to selectively adjust a phase and an amplitude of the offset signal.