hi guys

im almost done with my project , but im facing 1 problem with my amplifier that amplify the output of the coil,


this is the experiment i have done .
first , i set the function generator to max amplitude which gives 23V Ac at the oscilloscope and start with 30k f and its sin-wave .

and this is my steps;-

1- i use the function generator to produce a frequency that pass through the coil
2- i measure the output of the coil by using an oscilloscope to see the wave form then see the V-peack value
3- i start it with 30K f, and its give me 22mV AC from the coil.
4- i increase it to 60K f , and its gave me 38mV AC from the coil.
5- increase it to 90k f , and its gave me 52mV AC from the coil.
and its going on
when i increase the frequency the wave will increase and also the V-peak value ...

my question are
1- how much gain i have to use to amplify the signal ..??
2- my gain should be dependent base on what ?

thanx alot

 

helloooooooooooooooooooooooooooooooooooooo
neeeeed hellllp

 

Your gain should be dependent on how much voltage you want to have after the amplifier has amplified.