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Simulators >> RF Simulators >> Confusion about Ken's paper
https://designers-guide.org/forum/YaBB.pl?num=1269541771

Message started by lunren on Mar 25^th, 2010, 11:29am

Title: Confusion about Ken's paper
Post by lunren on Mar 25^th, 2010, 11:29am

Hi Ken,

http://www.designers-guide.org/Analysis/sc-filters.pdf

I was confused in page 22 (section 3.4) when I studied the above paper.

From the title of this section, I think unsmpldNoise means sources option and smpldNoise means timedomain option and these two analysis calculate the same output nodes (from netlist), right?

However in the picture12 (and also the section description), it seems the results were gotten from two different output nodes , one is unsampled node and the other is sampled node (with sample&hold?),
am I right?

I was confused about this. Can you clarify it for me?

Thanks,

Lunren

Title: Re: Confusion about Ken's paper
Post by Ken Kundert on Mar 26^th, 2010, 2:07am

They were two different nodes. At the time that paper was written the tdNoise feature was not available, so I actually put an idealized sample and hold in the circuit.

-Ken

Title: Re: Confusion about Ken's paper
Post by lunren on Mar 26^th, 2010, 10:02am

Ken Kundert wrote on Mar 26^th, 2010, 2:07am:

They were two different nodes. At the time that paper was written the tdNoise feature was not available, so I actually put an idealized sample and hold in the circuit.

-Ken

But in the LISTING 3, the netlist said that noisetype=timedomain. In that case, I assume that the netlist was updated however the simulation results (FIGURE 12) were gotten from older netlist?

Title: Re: Confusion about Ken's paper
Post by Ken Kundert on Mar 27^th, 2010, 5:44pm

Yes, I believe you are correct. The time domain noise was added in a revision but paper was not fully updated.

-Ken