在高频段是否能设计一个间接数字综合器呢?这可以利用几个锁相环代替通常的单环来完成。将宽带环与窄带环组合,则可得到细档调谐和低相位噪声。最简单的设计多半是由一个双环组成,如图1串联装置。此处将两个分频器简单地连接在一起,不需要数学上的计算,也不需要用 Is it possible to design an indirect digital synthesizer in the high frequency band? This can be accomplished by using several phase-locked loops instead of the usual single loops. Combining a wideband loop with a narrowband loop results in fine tuning and low phase noise. The simplest design is mostly composed of a double ring, as shown in Figure 1 series device. Here two divider simply connected together, does not require mathematical calculations, do not need to use