Assistance in analysing the frequency response of an inverting amplifier

Thread Starter

c1rcu1ts

Joined Oct 19, 2013
62
Hello all,

I was simulating the AC analysis of a particular op amp known as the THS4505, according to the diagram below
upload_2016-3-29_3-37-45.png

From the analysis, i found a peak which occurred at approximately 10MHz

upload_2016-3-29_3-38-20.png

Can someone explain to me why this occurs or point me in a direction where i can find the answer?
 

crutschow

Joined Mar 14, 2008
24,115
The peak may be due to the input capacitance in the op amp model.
Try reducing the resistors to about 2kΩ and see if the peak changes.
Also look at the response when in a non-inverting follower configuration for comparison.
 
Top