Thermal noise power thermometry
    2.
    发明授权
    Thermal noise power thermometry 失效
    热噪声功率测温仪

    公开(公告)号:US3878723A

    公开(公告)日:1975-04-22

    申请号:US46132074

    申请日:1974-04-15

    CPC classification number: G01K7/30

    Abstract: A system for measuring temperature has been provided wherein the absolute temperature Ts is determined by measuring the thermal noise power, i.e., the product of the thermal noise voltage and the thermal noise current generated by a sensing resistor at temperature Ts. The measured thermal noise power from the sensing resistor is a linear function of absolute temperature. The system senses the thermal noise voltage by means of a voltage-sensitive preamplifier and the thermal noise current by means of a currentsensitive preamplifier. The signals from the two preamplifiers are separately detected and stored in separate sample-and-hold circuits after which they are multiplied in a multiplier to obtain an output proportional to the thermal noise power. This means of temperature measurement is independent of the sensingresistor composition, the mass and nature of the charge carriers, and, in principle, the ohmic value of the sensing resistor.

    Abstract translation: 已经提供了一种用于测量温度的系统,其中绝对温度Ts是通过测量热噪声功率来确定的,即热噪声电压和感测电阻器在温度Ts产生的热噪声电流的乘积。 来自感测电阻的测得的热噪声功率是绝对温度的线性函数。 该系统通过电压敏感的前置放大器和热噪声电流通过电流敏感的前置放大器感测热噪声电压。 来自两个前置放大器的信号被单独检测并存储在单独的采样和保持电路中,然后将它们乘以乘法器以获得与热噪声功率成比例的输出。 这种温度测量方法独立于感测电阻器的组成,电荷载体的质量和性质,以及原则上感测电阻器的欧姆值。

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