Hi, I'm learning sampled circuit noise simulaton, pss+pnoise, start with the simplest S/H circuit.
- Simulator, Spectre 19.1
- TestBench (fig1), a switch-capacitor S/H circuit, as switch sampling frequency 400KHz >> RC frequency 27KHz, no alising should happen.
- Pnoise Setup (fig2), sampled noise, sampled phase, 2 outputs with Vc and Vn2
- Results (fig3). For density, Vc is twice larger than Vn2; while for EBW, Vn2 is twice larger than Vc.
Though the total noise of Vc and Vn2 are same, but the bandwidth and density are different.
I think Vn2 is more reasonable, the densisty and bandwidth are exactly what I calculate, but how to explain Vc? Could anyone help? thank you!
