Patent · US Expired

Circuit arrangement for a capacitive acceleration sensor

US5744717A · kind A · utility

3Cited by

2References

2Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Leo Tanten · Reutlingen, DE
Ulrich Fleischer · Neckartenzlingen, DE
Michael Barth · Stuttgart, DE
Bernd Mueller · Leonberg, DE

Key dates

Filing date	Jul 8, 1996
Grant date	Apr 28, 1998
Priority date	—
Expiry date	Jul 8, 2016

Classification

Technology area (CPC G)Physics
CPC primaryG01P15/125
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

In a circuit arrangement, in particular for a capacitive acceleration sensor having a first capacitor and a second capacitor, the two capacitors have a common middle electrode, which is movably supported in dependence upon an acting acceleration. A position-control circuit applies a voltage to the outer electrodes of the capacitors so as to keep the capacitors equal in size. An a.c. voltage is applied to the middle electrode and the a.c. current adjusting itself at the capacitors is evaluated for purposes of position control.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.