DIAGNOSTIC CIRCUITRY FOR MEASURING THE RESISTANCE AND LEAKAGE CURRENT OF AT LEAST ONE ELECTRIC CONSUMER, ESPECIALLY A PRIMER IN A MOTOR VEHICLE PASSENGER PROTECTION SYSTEM, AND A PASSENGER PROTECTION SYSTEM FITTED THEREWITH

摘要

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.