Tiejun Cao

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Based on the principle of blackbody radiation, sapphire optic fiber temperature sensor has been more widely used in recent years, and its temperature range is between 800 ~ 2000 o C, and the response time is in 10-2 magnitude, and transient temperature measurement can be high precision in harsh environments. Nonlinear constraints on sapphire fiber(More)
We investigate, for the first time, the design and implementation of a variable gain amplifier (VGA) circuit suitable for cryogenic temperature applications. Temperature compensation is studied to allow for such a large temperature swing. The proposed circuit is capable of operating at temperatures as low as 43 K. The device is fabricated in IBM(More)
Interharmonics frequencies are not integer multiple of the fundamental frequency, and interharmonics amplitudes are far less than fundamental amplitude and harmonics amplitudes, which mean high sensitivity to desynchronization problems, so it’s dificult to estimate interharmonics. In this paper, a new method based on random sparse sampling and compressed(More)
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