This is my first post and hope to contribute to the forums as well! :
I took a test last Wed., and am rethinking what I did.
So I wish I had a schematic available, if someone can point me to a website, that would be great!
What I had was a 2 input summing amplifier (One input was DC, and one was AC) So after both inputs there was a resistor of course, and then the two inputs tied together at point "A" (Virtual common to the op amp, and also where the negative feedback is as well).
So what I'm trying to figure out is, if both the currents that were going through the resistors were positive (the currents weren't opposing each other) (And they joined at Virtual common), so when I add the input currents to the negative feedback, should I use the total rms of both the AC and the DC current? "total rms = sqrt(I^2ac+I^2dc)" to get the current going through the negative feedback?
This being my first post, don't hate on me too hard! haha
any questions just ask, i'll be checking back every couple hours as im visit parris island for my sister's marine graduating and got me thinking about that test i took, lol
I took a test last Wed., and am rethinking what I did.
So I wish I had a schematic available, if someone can point me to a website, that would be great!
What I had was a 2 input summing amplifier (One input was DC, and one was AC) So after both inputs there was a resistor of course, and then the two inputs tied together at point "A" (Virtual common to the op amp, and also where the negative feedback is as well).
So what I'm trying to figure out is, if both the currents that were going through the resistors were positive (the currents weren't opposing each other) (And they joined at Virtual common), so when I add the input currents to the negative feedback, should I use the total rms of both the AC and the DC current? "total rms = sqrt(I^2ac+I^2dc)" to get the current going through the negative feedback?
This being my first post, don't hate on me too hard! haha
any questions just ask, i'll be checking back every couple hours as im visit parris island for my sister's marine graduating and got me thinking about that test i took, lol