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How to get the difference frequency of the two square waveform?

Question asked by Dingshang on Apr 11, 2017
Latest reply on Apr 14, 2017 by Clarence.Mayott

There are two square waveform which frequency are nearly 100MHz and 99MHz, I want to acquire the difference frequency of these two wave (about 1MHz) . So how to do to realize such schedule and which chips should be used?

thank you.

best regards!