About 22.5KHZ analog pulse signal (60V) duty ratio test, duty ratio accuracy 0.1%

Two methods:

1, collect the signal complete waveform, carries on the calculation:

Is it possible to select an analog capture card with a 250ks/s sampling rate to display the required waveform?

No! We have not considered measuring accuracy 0.1%!

Because the analog signal is continuous, the period of the signal is 1/(22.5K) =44.4us, duty cycle accuracy of 0.1%, the signal resolution of at least 44.4us/1000=44.4ns, the sampling rate than 1/44.4ns=22.5ms/ s to be large to measure to meet the accuracy requirements of the waveform!

2, the analog signal is converted to digital signal, using the pulse count to calculate its duty ratio:

The 60V analog pulse signal is converted into a digital pulse signal, and a pulse count is used to measure the duty ratio of the signal!

The digital signal is 0 or 1, different from the analog sampling requirements!

About 22.5KHZ analog pulse signal (60V) duty ratio test, duty ratio accuracy 0.1%