Patent · US Active

Charge pump frequency selection in touch screen sensor interface system

US8427452B2 · kind B2 · utility

3Cited by

0References

28Claims

0Family size

Assignee

PIXART IMAGING INC. · TW

Inventors

Abhay Kumar Rai · Fort Collins, US
Vitali Souchkov · Walnut Creek, US
Jeffrey Stone · Fort Collins, US

Key dates

Filing date	May 31, 2011
Grant date	Apr 23, 2013
Priority date	—
Expiry date	Jan 5, 2032

Classification

Technology area (CPC G)Physics
CPC primaryG06F3/0446
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

Various embodiments of charge pump circuitry configured to generate output signals having first distortion signals superimposed thereon are disclosed. Demodulator input signals are also disclosed that have second distortion signals superimposed thereon. A synchronization signal is delivered to demodulator circuitry through at least first and second integer divider circuits and to charge pump circuitry through at least the first integer divider circuitry such that the first and second distortion signals have frequencies that are integer divisions of the synchronization frequency.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.