Input Noise Floor of preamplifiers

Thread Starter

naumankalia

Joined Feb 19, 2016
30
Hi all

I am designing a variable gain pre-amplifier using AD604 at input stage and a band pass filter at AD604 output. I want to calculate theoretically the input noise floor of this whole preamp which will tell me the minimum input signal level detectable by it.

Can any one kindly guide me how to do it?
 

Thread Starter

naumankalia

Joined Feb 19, 2016
30
Hi all

This was indeed a very good tutorial related to Op-amp noise, however my problem is little bit more complicated as i have lot of resistor-capacitors as well as multiple of Op-Amps. Is there any software which can calculate theoretically the input/output noise levels of complicated circuits taking into account the parameters of different components used in it?
 

#12

Joined Nov 30, 2010
18,167
I think you're looking for a circuit simulator like LTspice, but I'm not sure because I don't simulate.
 
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