[SOLVED] - Noise Calculation Using Hspice | Forum For Electronics

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You are using an out of date browser. It may not display this or other websites correctly.You should upgrade or use an alternative browser. [SOLVED]Noise calculation using hspice

• Thread starter Knowledge.seeker
• Start date Oct 9, 2018

Status Not open for further replies. K

Knowledge.seeker

Junior Member level 2

Joined Oct 1, 2018 Messages 22 Helped 0 Reputation 0 Reaction score 0 Trophy points 1 Visit site Activity points 153 How many types of noise can we calculate using hspice? I am focussing on cmos inverter circuit. I have pre and post(with RC components) circuit file ,a testbench, model file. Noise data is getting published in the output lis file. I am not able to figure out actual noise calculated as there are so many thing getting dumped in lis output file . I am not working on any tool,only commands on linux . Can anyone suggest calculation of noise of inverter using hspice?

pancho_hideboo

Advanced Member level 5

Joined Oct 21, 2006 Messages 2,847 Helped 767 Reputation 1,536 Reaction score 733 Trophy points 1,393 Location Real Homeless www.youtube.com Activity points 17,490

Knowledge.seeker said: How many types of noise can we calculate using hspice? Click to expand...

What do you want to mean ?

Knowledge.seeker said: Can anyone suggest calculation of noise of inverter using hspice? Click to expand...

Use ".noise".

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K

Knowledge.seeker

Junior Member level 2

Joined Oct 1, 2018 Messages 22 Helped 0 Reputation 0 Reaction score 0 Trophy points 1 Visit site Activity points 153

pancho_hideboo said: What do you want to mean ? I mean which type of analysis : transient analysis,AC analysis or DC analysis and noises like: flicker,shot Use ".noise". Click to expand...

Used this .my code is below: .PROBE V(ZN) V(A1) .PROBE V(ZN) V(A2) .AC lin 1000 1HZ 1GHZ .NOISE v(ZN) VA1 VA2 1000 .PRINT ONOISE INOISE output file generated with this code is *.lis it has lot of data about what models we have used,values of technology parameters ands noise data also. Question is how can i verify that the noise is coming though analysis is the correct one.? Liberty file does not have noise data on which i am working .

pancho_hideboo

Advanced Member level 5

Joined Oct 21, 2006 Messages 2,847 Helped 767 Reputation 1,536 Reaction score 733 Trophy points 1,393 Location Real Homeless www.youtube.com Activity points 17,490

Knowledge.seeker said: .NOISE v(ZN) VA1 VA2 1000 Click to expand...

It can not be true. Show me true netlist.

Knowledge.seeker said: Question is how can i verify that the noise is coming though analysis is the correct one.? Click to expand...

".PRINT ONOISE INOISE ".

Knowledge.seeker said: Liberty file does not have noise data on which i am working . Click to expand...

What do you want to mean ? Use correct terminology. K

Knowledge.seeker

Junior Member level 2

Joined Oct 1, 2018 Messages 22 Helped 0 Reputation 0 Reaction score 0 Trophy points 1 Visit site Activity points 153

pancho_hideboo said: It can not be true. Show me true netlist. ".PRINT ONOISE INOISE ". Done this. What do you want to mean ? Use correct terminology. Click to expand...

I am using correct methodology.using nangate libraries of 45nm technology .These don't have noise data.

pancho_hideboo

Advanced Member level 5

Joined Oct 21, 2006 Messages 2,847 Helped 767 Reputation 1,536 Reaction score 733 Trophy points 1,393 Location Real Homeless www.youtube.com Activity points 17,490

Knowledge.seeker said: I am using correct methodology. Click to expand...

Can you understand a meaning of "methodology" ? "Liberty” does not mean "Library"

Knowledge.seeker said: using nangate libraries of 45nm technology . These don't have noise data. Click to expand...

Thermal Noise and Channel-Noise are included in simulation. However Fricker Noise is not included in your situation. Last edited: Oct 10, 2018 K

Knowledge.seeker

Junior Member level 2

Joined Oct 1, 2018 Messages 22 Helped 0 Reputation 0 Reaction score 0 Trophy points 1 Visit site Activity points 153 Sorry that was misprinted, Liberty does not have noise data or noise is written with some other identifier in the liberty which i am not able to figure out. I have seen noise data in ccs liberty files but not in nldm. Does noise can be calculated for nldm or ccs only. ?

pancho_hideboo

Advanced Member level 5

Joined Oct 21, 2006 Messages 2,847 Helped 767 Reputation 1,536 Reaction score 733 Trophy points 1,393 Location Real Homeless www.youtube.com Activity points 17,490

Knowledge.seeker said: I have seen noise data in ccs liberty files but not in nldm. Does noise can be calculated for nldm or ccs only. ? Click to expand...

Ｗｈａｔ relation do they have regarding HSPICE ? Can you understand things correctly ? K

Knowledge.seeker

Junior Member level 2

Joined Oct 1, 2018 Messages 22 Helped 0 Reputation 0 Reaction score 0 Trophy points 1 Visit site Activity points 153 i am taking noise data in liberty files as reference for my calculation results using simulator hspice. I am trying to calculate noise with nldm method using hspice. Status Not open for further replies.

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