文档介绍：数字工频频率表的设计I摘要工频频率表在一些大型电力设备中有着不可替代的作用,它可以时刻测量监视着市电频率的变化,在科技研究和实际应用中的作用非常重要。课题主要以锁相环、触发器以及计数器为核心元件,设计一个简易数字工频频率表,主要由信号整形、倍频、分频触发、计数译码显示等单元电路组成。整个设计采用纯数字电路,把来自市电的正弦频率通过整形、倍频处理,与振荡分频电路产生的秒脉冲信号通过闸门电路,计数单位时间内的脉冲个数,把计数结果译成BCD码并且通过数码管显示出来。电路原理设计简单,稳定,精度高,抗干扰性强,设计体积小,便于携带,使用方便,具有广阔的应用前景。关键词:频率;单元电路;倍频;分频;精度IIAbstractFrequencytableinanumberoflargeelectricpowerequipmenthasanirreplaceablerole,itmaybemeasuringmonitoringfrequencychanges,-lockedloop,ponent,thedesignofasimpledigitalfrequencymeter,posedofasignalshaping,frequency,frequencytrigger,,fromthecityelectricalsinusoidalfrequencythroughplastic,multiplied,andoscillationfrequencydivisioncircuitgeneratesapulsesignalthroughagatecircuit,countingthenumberofpulsesperunittime,,stability,highprecision,stronganti-jammingperformance,smallsize,convenientcarrying,convenientuse,:Frequency;Digitalchip;Divider;Octave;AccuracyIII目录1绪论...........................................................................................................................................................................................................................................................................................................................................................................................................................22方案设计........................................................................................................................................................................................................................................................................................................................................................................