Colecciones nacionales e internacionales de patentes

1. (WO1992009898) PIEZORESISTIVE SENSOR ARRANGEMENT, E.G. FOR THE PASSENGER PROTECTION SYSTEM OF A VEHICLE

Pub. No.:    WO/1992/009898    International Application No.:    PCT/DE1991/000211
Publication Date: 11-jun-1992 International Filing Date: 11-mar-1991
IPC: G01P 1/00
G01R 17/16
H03F 1/30
Applicants: SIEMENS AKTIENGESELLSCHAFT
SWART, Marten
Inventors: SWART, Marten
Title: PIEZORESISTIVE SENSOR ARRANGEMENT, E.G. FOR THE PASSENGER PROTECTION SYSTEM OF A VEHICLE
Abstract:
A piezoresistive sensor arrangement, e.g. for a passenger protection system of a vehicle, with a resistance circuit (RS1/RS2, RS3/RS4) of at least four resistors, two of which form a series mounting (RS1/RS2, RS3/RS4) with a tapping (A1, A2) between them. The first of the two external connections of the series mountings are interconnected (E11 with E21). The sensor has at least one single piezoresistive resistor to generate the output signal (Us) of the sensor arrangement, whereby it either electrically represents the resistance circuit, when at least one of these four resistors is a piezoresistive resistor, or it is supplemented by one or more resistors in addition to the resistance circuit. The interconnected first (E11, E21) external connections of the series mountings are connected to the output of an input differential amplifier (V1), the first output (+) of which is connected to a reference voltage (Uref). The second external connection (E21) of the first (RS1/RS2) of the two series mountings is connected to the second input (-) of the input differential amplifier (V1). The first series mounting (RS1/RS2) is bridged with a temperature-insensitive resistor (Rtk).