固定频率综观各种类型的频率合成电路以后,我们用三种电路来说明它们的设计特点。第一个例子是原子频标的频率合成器。这里忽略氢脉泽频率的最后五位数字,取值为1420.405兆赫,以简化设计。设计目的是输出具有脉泽频率精度的5兆标频。这种合成器可供单频的专用设 After a fixed frequency review of various types of frequency synthesis circuit, we use three circuits to illustrate their design features. The first example is an atomic frequency synthesizer. The last five digits of the hydrogen maser frequency are ignored here, taking the value of 1420.405 MHz to simplify the design. The design goal is to output a 5 Mhz standard with maser frequency accuracy. This synthesizer is designed for single-frequency use