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当检波器输入的高频信号幅度较小时(几毫伏到几十毫伏之间),检波二极管只工作在一个很小的电压动态范围之内,并出现一段指数形的伏安特性曲线,可用下列方程表示:式中,i_d是二极管中通过的电流,I_0是二极管的反向饱和电流,u_d是二极管两端的电压,V_T是温度电压当量。在小信号情况下,二极管对输入信号的正半周并不能表现其完全导通的特性,对负半周也不能表现其完全截止的特性。事实上,输入信号无论是正半周还是负半周,二极管内均产
When the detector input high-frequency signal amplitude is small (a few millivolts to tens of millivolts), the detector diode only works in a small voltage dynamic range, and the emergence of an exponential volt-ampere characteristic curve, Can be expressed by the following equation: Where, i_d is the current through the diode, I_0 is the diode reverse saturation current, u_d is the voltage across the diode, and V_T is the temperature and voltage equivalent. In the case of small signals, the positive half-cycle of the diode to the input signal does not show its fully conductive characteristics, nor does it exhibit a fully-cut-off characteristic for the negative half-cycle. In fact, whether the input signal is positive half cycle or negative half cycle, the diode is produced