Patent ID: 8514089
Filing Date: 2013-08-20
Classification: G01K

Abstract:
1. A temperature monitoring circuit comprising: a negative temperature coefficient (NTC) resistor, wherein a first terminal of the NTC resistor is connected to a power supply through a first resistor, a second terminal of the NTC is grounded; a zener diode, wherein a cathode of the zener diode is connected to a node between the NTC resistor and the first resistor, an anode of the zener diode is grounded through a second resistor; an alarm, wherein a first terminal of the alarm is connected to the cathode of the zener diode, and is grounded through a third resistor and a fourth resistor connected in series; and a silicon controlled rectifier, wherein a cathode of the silicon controlled rectifier is connected to the anode of the zener diode, an anode of the silicon controlled rectifier is connected to a second terminal of the alarm, a control terminal of the silicon controlled rectifier is connected to a node between the third resistor and the fourth resistor.