Hi again , if the meaning by noise , is temperature noise , if you consider low input impedances for CG amplifier ( it's input impedance is low ) , thus : Vn =sqrt( R*BW*K*T ) it demonstrates that noise is as low as possible , because of low input impedance , thus the out put noise is low , too . K is Boltzman constant , it which is around 1.38*10^-23 and T is temperature in kelvin and BW is band width .
Best Wishes
Goldsmith
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BTW :are you sure that your circuit is correct ? i don't think so ! because in CG , input is source and out put is from drain !