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Schematic of focal plane thermometric circuit.

Schematic of focal plane thermometric circuit.

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Figure 1. Low temperature characteristic of thermometric Si-diode.
Figure 2. Schematic of focal plane thermometric circuit.
Figure 3. Voltage-current characteristic of thermometric diode around 60K.
Temperature drift per 1℃ of measuring circuit.
Analysis of Temperature Drift in Precise Temperature Measuring Circuit of 12.5 μm Long Wave Infrared Detector
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  • Sep 2022
The 12.5μm long wave MCT infrared detector requires mK temperature control precision, which makes the temperature drift suppression problem of precision temperature measuring circuit prominent. Firstly, the temperature drift model of the precise temperature measuring circuit is established in this paper, and the influence of ambient temperature cha...
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Context 1
... wave focal plane precision temperature measuring circuit is shown in figure 2. Silicon diode temperature measuring circuit adopts four-line temperature measuring principle. ...
Context 2
... to figure 2, the temperature drift of the diode focal plane temperature measurement circuit can be decomposed into constant current source temperature drift, signal amplification circuit temperature drift and transformation circuit temperature drift. Where: ...
Context 3
... is to say the temperature drift of A, B1 and B2 on VB can be ignored, and only the temperature drift of A on the input voltage of secondary amplification needs to be considered. (2) The whole circuit temperature drift modeling According to the temperature measurement signal diagram in figure 2 and formula (1), If the influence of the constant current source circuit on the temperature measurement is ignored, the error of the measuring circuit is shown in the following formula when the device temperature changes ΔT. ...