Hello there. I am Beste. I'm a university student. Is there any other function that we can use to get phase in lock-in circuit other than hilbert transform? Also, apart from this circuit, can we draw a lock-in circuit using different elements?Thank you from now. Have a good day.
What hardware / software are you using in your lock-in circuit?
It looks like the Hilbert was used above in SigmaStudio because the signal generator did not have quadrature outputs (sine / cosine.) If you are using SigmaStudio and the ADAU1701 specifically, you might ask in:
If you're looking for general information on lock-in techniques, do a web search on "lock-in detection", there are lots of application notes.
This is an old thread, if you have any follow-on questions, please start a new one and refer back to this one if you want.
Hello Mark. The circuit I built and the output I got are as in the image. I am using the Adau1701 board. When the input signal and the reference signal have the same frequency value, we need to obtain a flat signal. I cannot see such a signal on the oscilloscope when I equalize it. What should I do for it?