TEMPERATURE MEASURING CIRCUIT

摘要

PCT No. PCT/DE90/00762 Sec. 371 Date May 29, 1991 Sec. 102(e) Date May 29, 1991 PCT Filed Oct. 5, 1990 PCT Pub. No. WO91/52290 PCT Pub. Date Apr. 18, 1991.The temperature measuring circuit includes a plurality of temperature sensors, each of which is formed by a temperature-dependent measuring resistance having two current terminals and two voltage tapping terminals arranged in each case between an associated current terminal and the temperature-dependent measuring resistance. The temperature sensors are connected via the current terminals in series and the series circuit is connected via two current conductors to an evaluating circuit which sends a constant current through the measuring resistances connected in series. For measuring the voltage drops caused by the constant current at the individual measuring resistances the voltage tapping terminals of each temperature sensor are connected by voltage conductors to the evaluating circuit. The two voltage tapping terminals of two temperature sensors following each other in the series circuit and assigned to two interconnected current terminals are each connected via a resistance to a common voltage conductor. This results in a considerable saving of connecting conductors compared with a temperature measuring circuit with the same number of temperature sensors each connected by two current conductors and two voltage conductors to the evaluating circuit.