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Spectre simulation with one instance operating at different temperature (Read 3113 times)

ywguo Community Fellow Offline Posts: 943 Shanghai, PRC	Spectre simulation with one instance operating at different temperature Jun 29^th, 2008, 4:58am Hi Guys, Can I simulate with one instance operating at the temperature different from other instances? For eg., one instance is set to operate at 125C while others at the nominal temperature, say 27C. Thank you. Yawei
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sheldon Community Fellow Offline Posts: 751	Re: Spectre simulation with one instance operating at different temperature Reply #1 - Jun 29^th, 2008, 4:34pm Yawei, There is an instance property, trise, for the bsim3v3 and bsim4 model that allows you to do this, I think. Best Regards, Sheldon
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ywguo

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Re: Spectre simulation with one instance operating at different temperature
Reply #2 - Jun 29^th, 2008, 7:08pm

Hi Sheldon,

I have checked BSIM3v3 manual and BSIM4 manual. There is not any parameter named trise. Sad

In HSPICE manual, a parameter named DTEMP is introduced. I find parameters named trise and dtemp in the CDF of res and nmos in analogLib. So I tried to instance nmos and res and measure its DC current. The operating point including Vth and Ids varies as I put a number for trise. However, the parameters trise and dtemp don't affect the resistance and current of the resistors.

Now the netlist looks like the following.
Code:

M1 (net3 net17 0 0) nch w=2u l=180.00n trise=40
M2 (net6 net17 0 0 ) nch w=2u l=180.00n
R1 (net20 0) rnpo1w l=10u w=1u dtemp=20
R2 (net22 0) rnpo1w l=10u w=1u

Yawei

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Geoffrey_Coram Senior Fellow Offline Posts: 1999 Massachusetts, USA	Re: Spectre simulation with one instance operating at different temperature Reply #3 - Jul 1^st, 2008, 5:23am I think Synopsys adds DTEMP to all their models, even if it's not in the standard. Cadence adds "trise" (note spectre is case-sensitive by default) to its models. I assume Eldo and other simulators have similar additions.
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