Circuit to provide signal to sense array
US8847911B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 20, 2011 |
| Grant date | Sep 30, 2014 |
| Priority date | — |
| Expiry date | Jul 18, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0446
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A circuit for generating a voltage is disclosed. The voltage has an amplitude greater than an available power supply. The circuit includes a driver to supply the voltage on an output terminal to an electrode of a touch sense array. The circuit also includes a charge pump array coupled to the driver. The charge pump array includes an array of charge pumps to supply an input voltage to the driver. The circuit also includes a feedback circuit coupled to the charge pump array. The feedback circuit is configured to measure the input voltage and to select different combinations of the array of charge pumps to maintain the voltage on the output terminal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.