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1.前言检波器电路通常如图1(a)所示,图中的二极管既用于解调又用于产生自动增益控制(AGC)电压,结构简单。而通常双二极管-三极管的第二个二极管用于后者的功能。这个易使人误解的简单电路并非是实际所
1. Introduction The detector circuit is usually shown in Figure 1 (a). The diode in the figure is used for both demodulation and automatic gain control (AGC) voltage generation. The structure is simple. And usually the second diode of the bipolar transistor is used for the latter’s function. This easy-to-understand simple circuit is not real