My question is to design an amplifier and can be used nice in noisy ebvironment. what software to show usually?
Thanks for help

 

Hi,

For this application, you need high PSRR amplifiers and to make it as low impedance as practical. You must employ proper PCB design techniques and maybe consider a copper shield around the circuitry.

Steve

 

What type of amplifier should i design for my question?

 

Design a differential amplifier with a high common gain rejection ratio.

What is the environment?

 

no much requirement needed, just need to eliminate noise in a hish noise signal environment. by the way, why high common gain rejection ratio needed ?thanks for help

 

you want help but refuse to give particulars. where are we supposed to find out the source of the noise P.S. ,eniroment ,signal , emf, not to mention others. the noise DB rejection only apply to P.S. has nothing to do with the other noises like gnds.

 

my input source is 50uV, n i would like to amplify it to few volt.

I start with a differential amplifier and the lower part of my differential amplifier is a constant current source. All is ok but when i wanna test about the noise elimination by connect differential input to a common signal, that the noise, meaning 2 input of differential i put the same source, but the stimulation result show that i didn't eliminate the signal( noise). How can i solve it or what should i add to solve my problem?

pls help, urgent...

 

If you can post up a schematic, we might be able to help. We need to know if the amp works with an AC or DC signal and the nature of the environmental noise.