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https://designers-guide.org/forum/YaBB.pl Design >> Analog Design >> Difference amplifier with a difference. https://designers-guide.org/forum/YaBB.pl?num=1245218690 Message started by Riotpack on Jun 16th, 2009, 11:04pm |
Title: Difference amplifier with a difference. Post by Riotpack on Jun 16th, 2009, 11:04pm Hello, I am trying to design a circuit but one small aspect is holding me back. I have two signals, we will call them A and B. I want signal A to always appear at the output I want signal B to be subtracted from signal A if they are common But what I dont want is signal B at the output. That sensor is there to pickup vibration and cannot be at the output for instance if it raises to a higher peak to peak voltage or has different information then sensor A. So it is like a difference amp, except one input is there for subtraction only. Signal A has varying DC offset as it is a Load Cell, it is the superimposed AC signal due to vibrations I am looking at. How is this achieved, I have been thinking about it for an hour now. Thank you for any suggestions. |
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