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:
Dec. 02, 2025
Filed:
May. 03, 2024
Qualcomm Incorporated, San Diego, CA (US);
Efthymios Philip Papageorgiou, Berkeley, CA (US);
Jessica Liu Strohmann, Cupertino, CA (US);
Jae Hyeong Seo, Pleasanton, CA (US);
Hrishikesh Vijaykumar Panchawagh, Cupertino, CA (US);
Kostadin Dimitrov Djordjev, Los Gatos, CA (US);
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
An apparatus for common mode noise cancellation in an ultrasonic fingerprint sensor comprising a resistor-inductor-capacitor (RLC) network, a piezoelectric layer, a pixel array electrically coupled with the RLC network at a first end of the RLC network and either: (A) a common mode canceling capacitive element electrically coupled with the RLC network in parallel with the pixel array and configured to attenuate at least a portion of the common mode component from the acoustic signal before the acoustic signal is received by the pixel array or (B) a common mode canceling circuitry electrically coupled with the RLC network at a second end of the RLC network and configured to introduce a feedback signal to the pixel array through the RLC network, wherein the feedback signal is determined based on the received acoustic signal at each pixel within the pixel array.