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What HSPICE command will simulate LDO noise ?

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letan

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I need simulate noise of LDO. I use Hspice. I must use what command to simulate noise. Please help me!
Thank you very much!
 

Re: LDO noise

The LDO noise is no different from any linear circuitry noise simulation. In HSPICE, you can use .noise statement in conjunction with .ac statement to simulate and calculate the noise transfer function, input-refered noise and output noise. You can check HSPICE mannual for more details.
 

Re: LDO noise

What is the source if we do .ac analysis? Do you mean the source is the input of the LDO?
 

LDO noise

i use pnoise and pss in spectre
 

Re: LDO noise

.an and .noise

I think use the input dc voltage lor load dc current as the source.
 

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