A low-cost frequency multiplier for synchronous sampling of periodic signals

A description is given of a low-cost device, based on a frequency multiplier, that allows the generation of sampling pulses synchronized with the signal frequency. The behavior of this device is analyzed in order to assure its ability to work with input signals in the frequency range typical of the mains. As an example of applying of this device, the results of the Fourier analysis on a multifrequency signal are given, showing the high accuracy that can be attained