Temperature detection circuit composed of the diode temperature sensor

Published:2011/8/23 22:29:00 Author: | Keyword: Temperature detection, diode, temperature sensor | From:SeekIC

The temperature detection circuit which is composed of the diode temperature sensor is as shown in the figure. In this circuit, the VD is used as the temperature sensor, the VD2 is the temperature compensation diode. The bridge type circuit is composed of the VD, VD2, R1, R2, R3 and RP1, the compensation current of the RP1 fixed diode is about 3uA. Every time when the temperature changes for 1℃, the bridge circuit outputs the 2mV voltage, this voltage is amplified by A1 and encourages the VT1 through VD3, and it drives the relay through VT1.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Control_Circuit/Temperature_detection_circuit_composed_of_the_diode_temperature_sensor.html

Print this Page | Comments | Reading(3)