Recent content by aagum_bae

Thanks a lot, I finally understand T_T

Here is my problem: this is the equation at the LPF of the LIA, when multiplying a sine wave and a square wave, setting the equation reduces to after integration we get which means which means for an impure sinewave with harmonics or some noise at harmonics will get demodulated, but not...

Thanks a lot for your time, if you look at the figures in that link, one of them with both inputs as square wave and the other one with one of the input being a sine wave. Now when you look at the figures where one of the input is a sine wave you see the spectrum at odd harmonics, but when you...

https://www.analog.com/en/analog-dialogue/articles/synchronous-detectors-facilitate-precision.html Can you take a look at this please? This article suggests that using square wave for both lock in and excitation leads to demodulation at DC, while using sinewave for one of the wave leads to...

Why does square wave for both excitation and demodulation lead to demodulation at DC While using one of the signals sine the signal gets demodulated to odd harmonics? I'm unable to do the maths of Fourier expansion and multiplying and passing through low pass filter