Electronics > Projects, Designs, and Technical Stuff
Generating Biphasic Signal with OpAamp
A.Ersoz:
Hello,
I use TLV27L1 OpAmp in my circuit. I feed inverting and non inverting inputs with square waves. But as an output, I did not get biphasic signal. Current output of the opamp is just an monophasic sqaure waves. Do you have any idea why I miss negative phase of the signal?
SiliconWizard:
Can you show your input signals ("Phase 1", "Phase 2")?
patrick1:
wow, if this is possible without playing silly buggers with the ground reference, i would like too know about this too.
A.Ersoz:
Sure!
DaJMasta:
To actually verify that your circuit isn't doing what's intended, you need to compare the two channels together on the scope - one by one doesn't show anything about their phase relative to each other, and if they're in phase and combined, your opamp should only have a standard squarewave output.
I assume your intended output is a step function when the two input square waves are out of phase? Right now your circuit is configured to attenuate the noninverting input by 1/3rd and apply a gain of 2 to the inverting input signal - I don't know if this is what you actually intended since the resistors chosen are the same values for each side.
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