Not so sure if this is the preferred way to do thing but anyway
I will put forward the proposition to use a circuit simulator.

Throw the schematics into PSPICE (the student version will do) and
do a parametric sweep. 

For this particular circuit, hand calculation is still possible.
However if we put some more resistors in series and in parallel,
the PSpice or other tools will be easier.

If this were a low voltage application, it would have been possible to
use some potentiometers to do the simulation. 

Regards,
Xiaofan

-----Original Message-----
From: piclist-bounces@mit.edu 
Sent: Friday, October 21, 2005 6:33 AM
To: piclist@mit.edu
Subject: [EE]: Fun with nested potential dividers
...
So how should I go about modifying this circuit? So far this is the best way
I've come up with:

1- Work out the values for the simplified circuit, so that Vk = -500V for
   R1+R2=1Meg2. New R1=x, new R2=y.
2- Split the circuit down into two dividers.
3- Calculate the component values required for the Vg1 divider, with R1+R2=x
4- Calculate the component values required for the Vg3 divider, with R1+R2=y

Does this sound like it'll work?



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