Measurement and temperature control circuit uses the infrared group inspection device

Published:2011/5/17 19:07:00 Author:TaoXi | Keyword: Measurement, temperature control, infrared group inspection | From:SeekIC

Related components PDF download: BC109BCY71 The ray stream will produces the AC signal in the detector. And this ray stream will be cut off by the chopper's (rotary separator) cycle. The infrared detector is working with the constant voltage to improve the stability. The big 6.8pF coupling capacitor can make the floor frequency lower and lower. In order to reduce the transistor T1's input resistance, we pull in the negative feedback. T1 and T2's current amplification coefficient is about 100, T3 and T4 are the differential circuit.



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