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help!How to use hspice to do noise analysis in PLL?
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selina_wch



Joined: 07 Aug 2006
Posts: 22
Helped: 1
Post08 Nov 2006 11:35   

help!How to use hspice to do noise analysis in PLL?
HSPICE manual wrote:
.NOISE v(out) v(in) inter

For example, I'd like to simulate the MOSFET noise contribution to PLL. v(out) is the VCO's out. How to add v(in)? I am able to calculate it using Razavi's fomular
while the result is not accurate and the noise parameters in spicemodel are not uesd. Could anybody help me? I have no spectral tool by hand.
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DZC



Joined: 12 Sep 2006
Posts: 158
Helped: 11
Post08 Nov 2006 15:48   

help!How to use hspice to do noise analysis in PLL?
Sometimes to use SPECTRE will be more convenient.
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