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- W3188805762 abstract "Precise temperature control is crucial for the development of sensitive instruments, as temperature fluctuations will introduce many negative effects. In temperature control systems, <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$1/{f}$ </tex-math></inline-formula> noise is dominant in the low-frequency range, which limits the temperature control precision. To suppress the <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$1/{f}$ </tex-math></inline-formula> noise, AC bridges based on the modulation-demodulation method are commonly used. While the <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$1/{f}$ </tex-math></inline-formula> noise is suppressed, other types of noise rise to domination, further limiting the precision of the temperature control system. The response of the AC-bridge readout circuit to temperature fluctuation is the most serious. This paper proposes a method for suppressing the response of the AC-bridge readout circuit to temperature fluctuations. Using this method, the temperature coefficient of the readout circuit is reduced by matching the temperature coefficients of the used electro-components according to their weights of impact. This method has been verified in the test of a precise temperature control system designed for a superconducting gravimeter. The temperature coefficient of the AC-bridge circuit was reduced by approximately 57.4 times compared with the unmatched AC-bridge circuit, and the temperature fluctuation in the vacuum chamber of the superconducting gravimeter was controlled within <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$pm 5~mu text{K}$ </tex-math></inline-formula> ." @default.
- W3188805762 created "2021-08-16" @default.
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- W3188805762 date "2021-10-01" @default.
- W3188805762 modified "2023-10-16" @default.
- W3188805762 title "Temperature Coefficient Reduction of AC-Bridge Circuit for Cryogenic Temperature Control System" @default.
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- W3188805762 doi "https://doi.org/10.1109/jsen.2021.3103190" @default.
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