[Amps] Equalising resistors with HV diodes

[R.Measures]

On Sep 21, 2004, at 11:49 PM, peter.chadwick at Zarlink.Com wrote:

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> Rich said:
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>> Bzzzzzzzt.  I should have said ... ... the die of the 1000v diode must
>> be much larger.
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> Why? Die area is related to the current: voltage to the diffusion 
> profile.
> So is the gamma, the  factorr elating reverse volatge and capacitance.

Peter --- Since  junction (intrinsic-region)  C decreases as Vr 
increases, a diode whose C at 200v is equal to the junction C of a 
diode whose Vr is 1000v, the 1000piv diode's die would seemingly have 
to be larger.
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Richard L. Measures, AG6K, 805.386.3734.  www.somis.org