Hello,
I'm trying to figure out what the input impedance to this op-amp circuit is. I have 2 ways I've been thinking about this, and I'm not sure which one is right, or if they're both wrong. I'm looking for the input impedance as seen by the AC voltage source, V1.
Way 1: It's the impedances of C1, C2, and R3 in series. Done
Way 2: Thinking about a virtual short, it's C1, C2, R3, and R2 in series. Done
Basically, I'm wondering if R2 plays a role in the input impedance (as defined above) in this circuit.
much thanks!
I'm trying to figure out what the input impedance to this op-amp circuit is. I have 2 ways I've been thinking about this, and I'm not sure which one is right, or if they're both wrong. I'm looking for the input impedance as seen by the AC voltage source, V1.
Way 1: It's the impedances of C1, C2, and R3 in series. Done
Way 2: Thinking about a virtual short, it's C1, C2, R3, and R2 in series. Done
Basically, I'm wondering if R2 plays a role in the input impedance (as defined above) in this circuit.
much thanks!