Patent · US Expired

Sensor apparatus including compensating circuit for temperature effects

US5818225A · kind A · utility

17Cited by

1References

7Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Klaus Miekley · Ludwigsburg, DE
Erich Rubel · Ludwigsburg, DE
Ralf Noltemeyer · Wernau, DE

Key dates

Filing date	Dec 2, 1996
Grant date	Oct 6, 1998
Priority date	—
Expiry date	Dec 2, 2016

Classification

Technology area (CPC G)Physics
CPC primaryG01D3/036
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

The sensor apparatus includes a sensor device having a control current (I.sub.H) flowing through it, a sensitivity and a temperature dependence of the control current characterized by a temperature coefficient, and a temperature compensating circuit for compensating temperature changes adversely effecting the sensitivity of the sensor device. The temperature compensating circuit includes a circuit portion which sets or adjusts the temperature coefficient of the control current(I.sub.H) according to changes in the temperature dependent internal resistance of the sensor device so that changes in negative temperature coefficients of other physical quantities determining the sensor sensitivity are compensated.

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