Integrated interface circuit for processing the signal supplied by a capacitive sensor
US5155396A · kind A · utility
4Cited by
5References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 3, 1990 |
| Grant date | Oct 13, 1992 |
| Priority date | — |
| Expiry date | Oct 3, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B1/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The circuit comprises an amplitude limiter made up with the use of two CMOS transistors and a circuit connected to the output of the amplitude limiter for filtering the signal and changing its level. The filtering and level-changing circuit is arranged, in particular, to achieve band-pass filtering in order to prevent aliasing effects which might arise during the sampling of the signal by subsequent switched-capacitance processing circuits, and to attenuate low-frequency components of the signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.