Kamran1992
Junior Member level 1
Hi all,
I simulated a source degenerated LNA in ADS and I got S21=7(not in dB for now). Now as far as my knowledge S21 is giving the power gain. If I try to extract voltage gain from PG:
Ri=50ohm, Ro=1.3Kohm(the calculated impedance of the LC tank at fc)
Does it mean that the LNA multiplies the voltage at its input by 13.5?
I ran a transient simulation and I got a different number. Why!?
and what about S21 in dB? dB(S(2,1)) in ADS gives 20log(S(2,1))! shouldn't it be 10log since its about power?
I simulated a source degenerated LNA in ADS and I got S21=7(not in dB for now). Now as far as my knowledge S21 is giving the power gain. If I try to extract voltage gain from PG:
Ri=50ohm, Ro=1.3Kohm(the calculated impedance of the LC tank at fc)
Does it mean that the LNA multiplies the voltage at its input by 13.5?
I ran a transient simulation and I got a different number. Why!?
and what about S21 in dB? dB(S(2,1)) in ADS gives 20log(S(2,1))! shouldn't it be 10log since its about power?