I have been just playing around with Op Amps and their properties, and have been trying to make a circuit that has a tunable phase shift. I got the idea from this PDF I found of a lab at OSU. I have attached that file where I got the idea.
I have simulated it in LTspice IV and have been trying to make a prototype with some success. The issues I've having have just been bugging me.. so hoping you guys could help.
I also have attached the .asc file for it. To play with the phase shift, just change the value of R6 (I have a potentiometer on my breadboard, its cool to see phase shift moving back and forth as you spin it)
The thing that has been bugging me is I simulated this fine, but my prototype the amplitude is attenuated to ~15% on the output, very annoying. Is there anything I'm doing just glaringly wrong? Could it be my Op amps? I'm actually using INA154's in my prototype.. just what I had around
My background is more DSP and communication systems.. so I'm not too strong in this area.. Any help is great! Thanks guys
I have simulated it in LTspice IV and have been trying to make a prototype with some success. The issues I've having have just been bugging me.. so hoping you guys could help.
I also have attached the .asc file for it. To play with the phase shift, just change the value of R6 (I have a potentiometer on my breadboard, its cool to see phase shift moving back and forth as you spin it)
The thing that has been bugging me is I simulated this fine, but my prototype the amplitude is attenuated to ~15% on the output, very annoying. Is there anything I'm doing just glaringly wrong? Could it be my Op amps? I'm actually using INA154's in my prototype.. just what I had around
My background is more DSP and communication systems.. so I'm not too strong in this area.. Any help is great! Thanks guys
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