Half-bridge fingeprint sensing method
US10380397B2 · kind B2 · utility
0Cited by
10References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 22, 2015 |
| Grant date | Aug 13, 2019 |
| Priority date | — |
| Expiry date | Jun 6, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/1306
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Fingerprint detection circuits with common mode noise rejection are described. The Fingerprint detection circuit includes a half-bridge circuit coupled to a receive (RX) electrode of an array of fingerprint detection electrodes and to a buried capacitance that is unalterable by the presence of a conductive object on the array. The fingerprint detection circuit may also include a listener electrode configured to enable common mode noise rejection through a differential input stage of a low noise amplifier (LNA).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.