Boost buffer aid for reference buffer
US8564252B2 · kind B2 · utility
8Cited by
151References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 9, 2007 |
| Grant date | Oct 22, 2013 |
| Priority date | — |
| Expiry date | Apr 8, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/960725
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A circuit for charging a capacitive load to a reference voltage in a capacitive sensor measurement circuit includes a reference buffer, a boost buffer, and drive logic. The reference buffer and the boost buffer are coupled with the capacitive load to be charged. The boost buffer first charges the capacitive load towards the reference voltage at a first rate of charging, and then ceases charging. The reference buffer subsequently continues charging at a slower second rate to settle the voltage across the capacitive load to within a tolerable range of the reference voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.