Touch analog front end and touch sensor controller having the same
US9898149B2 · kind B2 · utility
7Cited by
2References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 17, 2015 |
| Grant date | Feb 20, 2018 |
| Priority date | — |
| Expiry date | Apr 14, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04108
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A touch analog front-end (AFE) for a touch sensitive screen may include a transmitter configured to charge a touch panel and a receiver configured to sense the touch panel. The receiver may include a charge-to-voltage (C2V) converter configured to convert a change of capacitance received from the touch panel into a voltage signal, a correlated double sampling (CDS) block configured to convert the voltage signal into a differential signal and to sample each of the positive and the negative signals of the differential signal, and an integrator configured to accumulate a difference between the sampled positive and negative signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.