文档介绍：目 录摘要:  1关键词:  11系统设计                22系统硬件电路设计          53系统软件设计  54系统的测试和误差分析                75参考文献  8附录  8附录1  8附录2  9摘要:本设计以C8051F020单片机为核心控制芯片,由信号发生器输出被测信号,一路信号经过放大器后,再由单片机处理是否转换档位。然后由C8051自带的12位ADC测量电压最大值,经过单片机处理,算出峰峰值。另一路经过TLV3501进行整形后,由单片机测量此信号频率,当频率大于200kHz时,转换档位进行分频测量。当频率小于200kHz时,直接测量被测信号频率。然后由单片机控制LCD-12864显示出被测信号的频率、峰峰值和波形。关键词:C8051F020    放大器    整形  分频  ADCAbstract:ThedesignwithC8051F020SCMasthecorecontrolchip,wasfirstmeasuredsignalinputtothesignalgeneratorcircuitdesignbymanualshift,uratemeasureofthemeasuredsignalfrequency,whenmeasuredsignalvoltagerangeis1Vto10V,,sosignalattenuationcircuitwouldbepassing,andthensentintoMCUADCmeasureofthemeasuredsignalvoltage,andafterTLV3501isshapedbytherelayforprogram,aftertreatment,whenthefrequencyshiftlessthan200KHz/sdirectlytotheMCUisprocessingthefinalfrequency,whenfrequencymorethan200KHz/sneedthroughtheCD4518splitfrequencyprocessingandthensenttothemicrocontrollergettestedfrequencyofthesignal,andthenthesingle-:,为了更精确的