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unit900
Joined: 08 May 2006
Posts: 24
Helped: 1
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 07 May 2008 5:48 IPTAT^2 current source |
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Hello.
If it possible, can anybody help me with IPTAT^2 current source design?
I find the papers about it.
Thanks in future.
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supreet_95
Joined: 23 Sep 2007
Posts: 49
Helped: 8
Location: bangalore
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| 07 May 2008 8:33 IPTAT^2 current source |
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| Hi u can generate the IPTAT current using the standard BG topology. U want to generate squared value of that or linearly amplified value of that?
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unit900
Joined: 08 May 2006
Posts: 24
Helped: 1
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| 08 May 2008 15:05 Re: IPTAT^2 current source |
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| I need quadratic PTAT current for curvate-comp. bandgap
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rfsystem
Joined: 25 Feb 2002
Posts: 786
Helped: 83
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| 10 May 2008 23:33 Re: IPTAT^2 current source |
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I thought that the curvature compensation is needed because the
VBE have ~ -2mV/K
and the the a*VT have a*VT/Temp
where Temp is the actual temperature. So the temperature coefficient is zero only at one designed temperature.
But why do you need something (b*VT)^2 ?
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