摘要
使用直接测频法设计了一种简易的数显频率计,用于测量常见的正弦波、方波、三角波信号。该数显频率计主要包括时间信号电路、计数显示电路和时序控制电路,并进行了层次化的设计优化。时间信号电路完成输入信号与时钟信号的与运算,并把与运算后的脉冲传递给计数显示电路。计数显示电路完成频率计的频率计数以及显示功能。时序控制电路实现当上升沿或下降沿来临时触发脉冲的功能。在Multisim 11.0软件环境下进行总体电路的设计及调试,仿真结果表明数显频率计实现了正常的测量功能,满足设计要求。
The simple digital display frequency cymometer is designed using direct frequency measurement. It is used in the frequency measurement of sinusoidal wave,square wave and triangular wave. The digital frequency cymometer is made up of time signal circuit,counting and display circuit and sequential control circuit. Circuit design is optimized by hierarchical design. The time signal circuit worked on the ＂and＂ operation of input signal and clock signal. Then it transfers pulses to the counting and display circuit. The counting and display circuit work on the frequency counting and displaying. The convert from rising or falling edges to temporary trigger pulses is done by the sequential control circuit. The general system design and simulation are measure frequency function is realized and the completed in Muhisim 11.0. Simulation results show that performance meet the design requirement.
出处
《电子设计工程》
2017年第5期133-137,共5页
Electronic Design Engineering
