Patent ID: 8033721
Filing Date: 2011-10-11
Classification: G01K

Abstract:
1. A temperature sensor circuit comprising: a first switching device comprising a collector connected to a power supply, a gate, and an emitter; a diode comprising an anode connected to the gate of the first switching device and a cathode connected to the collector of the first switching device; a depletion mode n-channel MOSFET comprising a drain connected to the emitter of the first switching device, a source connected to a ground, and a gate fixed at a ground potential; an output terminal connected to the drain of the depletion mode n-channel MOSFET; a short-circuiting device connecting the output terminal to the ground; and a delay device outputting a signal that makes the short-circuiting device work for a predetermined period of time from a time point, at which the power supply is connected to the temperature sensor circuit.