Hi, I am trying to get Noise Figure in track and hold circuit with RC>>Ts/2. My ckt is like RC low pass filter {Port(with res=50) + switch + cap to gnd }
NF= 10logF, where F is Noise Factor
and F = (Ni+Nsys)/Ni.
In my circuit Nsys = 0 (Sys include only switch and cap, there is no res(noise generator)). so, F should be =1, so the Noise figure should be = 0.
But, cadence giving me F = 1.96 and NF = 2.92 dB. (I am measuring it with Pss+Pnoise)
what I am doing wrong?
