charge pump?

though it was shorted to ground ;-P


> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Howard Winter
> Sent: Saturday, June 26, 2004 9:45 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [EE]: Supressing fast transients
>
>
> On Wed, 23 Jun 2004 14:03:04 -0500, David VanHorn wrote:
>
> > Layout done right is like a proper sewer system, nearly all the
> S*** goes where you want it to, almost all
> the time.  (Feel free to quote this.. :)
>
> Sir Joseph Bazalgette would have been proud!  He built the London
> sewage system, about 150 years ago.  Let's
> see how the analogy runs...
>
> He built Interceptor Sewers (Y capacitors?) that collected the
> effluent and ran gently downhill in enclosed
> tunnels to keep going the right way (shielding, chokes?), merging
> together and getting bigger until they
> reached the sea (supply Earth).  There were one-way self-closing
> doors at junctions that stopped an
> unexpectedly high level in one part of the system from flowing
> back up another (diodes?).  To cope with storms
> there were weirs that allowed excess effluent to flow over into a
> secondary system (varistors?).
>
> That seems to work reasonably well!  :-)  Gives me a way to
> remember how to do it in future...
>
> The one problem he had that doesn't map is that the downhill flow
> ended below sealevel, so he had to build a
> pumping station to bring it back up - I'm not sure if this
> situation has an analogue in electronics?
>
> Cheers,
>
> Howard Winter
> St.Albans, England
>
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