The circuit that I'm seeking should give me a constant relative phase shift of 90 degrees perhaps over a decade frequency range. I'm after an analog solution with op-amps. For now at least it doesn't have to be very accurate, something like within +/- 20 % would be fine.
Searching on the web, I have come across procedures to do this. However they are all very high-level math intensive, all of which I don't understand. So what I am seeking is a relatively simple procedure for designing the shifter from a few op-amps. My preference would be to basically understand how it works, but that isn't necessary. Just a bunch of equations that I could use without knowing what I'm doing would be okay.
At this point I'm not certain that the phase shifter will do what I want in my scheme of audio signal processing, so I don't wish the design and testing to be very laborious, nor do I expect high tolerance over a wide audio bandwidth.
Thanks if anyone can help,
Pete
Searching on the web, I have come across procedures to do this. However they are all very high-level math intensive, all of which I don't understand. So what I am seeking is a relatively simple procedure for designing the shifter from a few op-amps. My preference would be to basically understand how it works, but that isn't necessary. Just a bunch of equations that I could use without knowing what I'm doing would be okay.
At this point I'm not certain that the phase shifter will do what I want in my scheme of audio signal processing, so I don't wish the design and testing to be very laborious, nor do I expect high tolerance over a wide audio bandwidth.
Thanks if anyone can help,
Pete