help with proper noise source in Cadence
时间：04-08
整理：3721RD
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Hello All
I am simulating a mixer in cadence and for measuring its NF I am using PSS+PNOISE.
in Pnoise setting, for setting input and output we have options of voltage source and probe for output. The former option takes into account the noise added by port's internal resistor itself while the latter does not.
The results differ by 3-4 dB which is higher for the voltage source.
I tried the PNOISE analysis for a simple Pi type resistive attenuator and compared the results of both cases with noise analysis in SP. PNOISE simulation results with Probe option for output coincides with NF from SP.
Now My question is which one is correct or which will be seen during the measurement?
Thanks,
Mohammad
I am simulating a mixer in cadence and for measuring its NF I am using PSS+PNOISE.
in Pnoise setting, for setting input and output we have options of voltage source and probe for output. The former option takes into account the noise added by port's internal resistor itself while the latter does not.
The results differ by 3-4 dB which is higher for the voltage source.
I tried the PNOISE analysis for a simple Pi type resistive attenuator and compared the results of both cases with noise analysis in SP. PNOISE simulation results with Probe option for output coincides with NF from SP.
Now My question is which one is correct or which will be seen during the measurement?
Thanks,
Mohammad