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在由平均接触电势所致的内部振荡所引起的电抗变化种种工作模式中,约氏结超流参量特性可用于高频信号放大。这些工作模式是:1)单空闲负阻放大。此种模式完全等效于通常采用的变容二极管参量放大器。2)更多频率的多空闲负阻放大。这是一种典型的电阻性并联结模式。3)上变频放大。这是在射频量子干涉器件中理性上所采用的一种模式,用于磁强计。本文即描述了这些模式的实验证实情况,并讨论了它们对于低噪声放大的适用性。在上变频器实验中,可以改变输入终端温度来测量器件温度,噪声温度上限确定为15K。该实验证明:在有源自激约氏结的高频应用中,可获得的基本噪声并没有太多地超过其热噪声极限。
In various operating modes of reactance changes due to internal oscillations due to the average contact potential, the Yoshimitsu junction flow parameters can be used for high-frequency signal amplification. These working modes are: 1) single idle negative resistance amplification. This mode is completely equivalent to the commonly used varactor parametric amplifier. 2) Multi-frequency more idle negative resistance amplification. This is a typical resistive and junction mode. 3) up-conversion amplification. This is a mode rationally used in RF quantum interference devices for magnetometers. This article describes the experimental verification of these modes and discusses their applicability to low noise amplification. In the upconverter experiment, the input terminal temperature can be changed to measure the device temperature, the upper limit of the noise temperature is determined as 15K. This experiment proves that the fundamental noise that can be obtained does not exceed its thermal noise limit too much in high-frequency applications of active self-excited junction.