hi

I want to know what is the effect of the order of gain on several amplifiers arranged in a row?
For example, the gain of the first amplifier is small, then the next amplifier has more gain.
Or vice versa.

 

For what kind of application?

 

hi p,
Series OPA's are sometimes configured in this way, in order improve the overall gain/bandwidth of the 'amplifier'
E

 

Noise.
The second amplifier amplifies the signal and it also amplifies the noise of the first amplifier.
For lowest noise, the first amplifier should always be the quietest, and the one with the most gain

 

Gains are multiplied.

 

If you specify the gain in decibels, then you only have to add them

 

For what kind of application?

To convert the current to voltage, I used the first photodiode of a TIA amplifier, and then placed two other amplifiers in series so that I could increase the voltage and turn it on with an analog-to-digital converter.

 

Usually once the transpedance amplifier brings the signal up to a workable level you can relax a little: unless following stages are pretty bad, your signal will be fine.