This may be a really simple question but Op Amps still confuse me a little. I have a low pass filter circuit as shown below.
My question is whether the 10k resistor is part of the filter circuit or is it just for input current biasing reasons. If it is part of the filter circuit how do you derive the transfer function?
From looking at it i initially thought that the filter was the 47 Ohm resistor and capacitor then using 1/2*piRC that would give the cutoff frequency but i am not sure this is correct.
Thanks for your help - its really appreciated!