Patent · US Expired

DIAGNOSTIC CIRCUIT FOR MEASURING THE RESISTANCE AND THE LEAKAGE CURRENT OF AT LEAST ONE FIRING CAP OF A MOTOR VEHICLE OCCUPANT PROTECTION SYSTEM, AND A MOTOR VEHICLE OCCUPANT PROTECTION SYSTEM INCLUDING THE DIAGNOSTIC CIRCUIT

US6498494B2 · kind B2 · utility

5Cited by

3References

15Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Horst Belau · Bad Abbach, DE
Stefan Hermann · Neutraubling, DE
Marten Swart · Obertraubling, DE

Key dates

Filing date	Mar 9, 2001
Grant date	Dec 24, 2002
Priority date	—
Expiry date	Mar 9, 2021

Classification

Technology area (CPC G)Physics
CPC primaryG01R31/2829
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

The resistance value and the leakage current of a load can be measured simultaneously. A load current is fed, mirrored by electrical power supplies (1, 3, 36), into a resistance measuring circuit (13, 30) and a leakage current measuring circuit (14 to 16). This permits rapid, precise measurement of a plurality of loads by a single measuring circuit connected via one multiplexer. The firing transistors can be distributed among different ASICs or provided jointly for a plurality of firing caps.

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