本文介绍的可变分频器,工作频率高、功耗小、逻辑线路简单。它全部由中规模集成电路构成。可利用8421码直接预置,省掉了预置译码器。它可用于计算机系统实时控制的数字式频率合成器。经过在某系统工程中使用证明,该分频器逻辑设计合理、性能良好。 This article describes the variable divider, high frequency, low power consumption, simple logic circuit. It is all made of mid-scale integrated circuits. 8421 yards can be used directly to the preset, eliminating the need for pre-decoder. It can be used in computer system real-time control of digital frequency synthesizer. After the use of a system engineering certificate, the divider logic design is reasonable, good performance.