# frequency counter

Posted on Feb 6, 2014

This design synthesis has considered the survey accuracy of the frequency and measured the requirement of response time. For example it is 3 significant digits to look on the measuring result of the frequency as, require, at this moment if the frequency of the signal to be measured is 1 Hz, it must be greater than 1 000 s to count the gate width.

In order to give consideration to the survey accuracy of the frequency and requirement for measuring response time, divide measuring the work into two kinds of methods: 1 When at the time of frequency of the signal to be measured> 100 Hz, fix /counter constitute counter, on a basis of machine cycle, produce, count gate from software, width count gate>, at the 1 s, satisfiable the intersection of frequency and for 3 significant digit measuring result; 2 As the frequency <100 Hz of the signal to be measured, timing / counter constitutes the timer, by turning the signal to be measured into a rectangular wave for the processing circuitry of frequency counter, the rectangular wave width equals the cycle of the signal to be measured. Make and count the gate with the rectangular wave at this Read more This design synthesis has considered the survey accuracy of the frequency and measured the requirement of response time. For example it is 3 significant digits to look on the measuring result of the frequency as, require, at this moment if the frequency of the signal to be measured is 1 Hz, it must be greater than 1 000 s to count the gate width. In order to give consideration to the survey accuracy of the frequency and requirement for measuring response time, divide measuring the work into two kinds of methods: 1 When at the time of frequency of the signal to be measured> 100 Hz, fix /counter constitute counter, on a basis of...

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