[Neuroscience] Op Amps - The Voltage Follower Circuit
(by connelly.bill from gmail.com)
Fri Feb 13 20:16:27 EST 2009
I'm having a hard time understanding the classical Voltage Follower
Circuit made by a single op amp. I wont bother trying to draw it in
ASCII, just have a look here if you don't know what I'm talking about:
This is who I'm thinking about it (which I'm sure is wrong):
1) Lets imagine you have a 1mV input to the + input.
2) At the instant this is switched on the - input is 0, so the op amp
3) Now the + input still gets 1mV and - input gets 1mV, so the amp
outputs 0mV, sending us back 1)
I appriciate that the op amp works 'instantaneously' so you don't get
oscillations like I described, but I still don't know how one can
conceptualize op amps without getting into these kind of oscillations.
Thanks for anyone who can tell me the correct way to think about this
More information about the Neur-sci