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:
Feb. 11, 2014
Filed:
May. 16, 2011
Jerome D. Wong, Sunnyvale, CA (US);
Mercedes Gil, Fort Collins, CO (US);
Zhi Zhong Huang, Pudong, CN;
Xu Zhang, Pudong, CN;
Xiao Yan Zheng, Pudong, CN;
Jerome D. Wong, Sunnyvale, CA (US);
Mercedes Gil, Fort Collins, CO (US);
Zhi Zhong Huang, Pudong, CN;
Xu Zhang, Pudong, CN;
Xiao Yan Zheng, Pudong, CN;
Pixart Imaging, Inc., Hsin-Chu, TW;
Abstract
Various embodiments of a low-power-consumption analog-to-digital converter ('ADC') for a touchscreen or touch panel in a capacitive sensing system are disclosed. The ADC is configured to operate in a first mode or a second mode. The first mode is characterized by a first resolution having a first number of ADC bits and a first level of power consumption associated therewith. The second mode is characterized by a second resolution having a second number of bits and a second level of power consumption associated therewith. The ADC operates under control of the controller and is configured such that the first number of bits is greater than the second number of bits and the first power level is greater than the second power level. The controller causes the ADC to switch from operating in the first mode to operating in the second mode when low radio frequency (RF) noise conditions are detected by sense circuitry, the ADC and/or the controller.