How to find delta Vbe/delta T for bandgap from the process ?

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surianova

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delta vbe

How to find the (delta Vbe/delta T) for bandgap design from the process parameter?

Surianova
 

Re: delta Vbe/delta T

u can do a dc analysis, like this

VS OUT IP DC 0V
Q1 VSS VSS IP BIP10 M=1
I1 0 OUT DC CUR
V1 VSS 0 DC 0
.TEMP 27
.OPTIONS NOMOD NOPAGE ACCT POST
.DC temp -20 120 1 sweep CUR 6u 12u 2u
.PARAM CUR=6u
.INC bjt_model
.meas dc DVE_DT DERIV v(ip) when v(ip)=0.663 CROSS=1
.ends
 

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    surianova

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Re: delta Vbe/delta T



can i find it from process parameter without simulation?
 

Re: delta Vbe/delta T

surianova said:
can i find it from process parameter without simulation?
Click to expand...


I don't think so because its not a constant number.
 

delta Vbe/delta T

u should do dc simulation.For the delta Vbe/delta T is not constant for a bandgap like the relation for a single bipolar transistor..
 

Re: delta Vbe/delta T

Btrend said:
u can do a dc analysis, like this

.meas dc DVE_DT DERIV v(ip) when v(ip)=0.663 CROSS=1
.ends
Click to expand...

what is this parameter means? thanks
 

Re: delta Vbe/delta T

it is a measurement command for HSPICE, it is equivalent to "find the derivate of Vbe at Vbe=0.663 with respect to tempearture.
 

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