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本文分析的自动调谐跟踪环路是美国HP公司出的8410A网络分析仪和8411A谐波变频器中使用的具体环路,其方框组成如图1所示。作谐波混频用的本地振荡信号可自动追随0.11～12.4千兆赫频率范围内任一正弦波输入信号,获得稳定的20兆赫的中频信号输出。本
The autotune tracking loop analyzed in this paper is the specific loop used by 8410A Network Analyzer and 8411A Harmonic Drive from HP Company in the United States. The block diagram is shown in Figure 1. The local oscillation signal used for harmonic mixing can automatically follow the input signal of any sine wave in the frequency range of 0.11 ~ 12.4 GHz to obtain a stable 20 MHz intermediate frequency signal output. this