[sdiy] Guard Rings

[Ingo Debus]

Am 05.11.2010 um 06:30 schrieb David G. Dixon:

>
> The junctions between the emitters of Q5 and Q6, resistors R16 and  
> R18, and
> the drains of Q11 and Q12, respectively, are emphatically NOT high
> impedance.  In fact, their impedances are about 2.2k.

These are outputs of emitter followers, so their impedances are even  
lower.

Can someone explain to me how the "Random Voltage Generator" works?

Ingo