SV: Re: [sdiy] overclocking BBDs

[karl dalen]

C varies with f a bit,C has also a leakage constant depending on f!
Heeeey, C varies with T also! I almost forgot! If P get exessive i bet
C vill vary! 

KD (crossing his fingers)

--- Magnus Danielson <cfmd at bredband.net> skrev:

> From: "JH." <jhaible at debitel.net>
> Subject: [sdiy] overclocking BBDs
> Date: Wed, 2 Aug 2006 01:10:34 +0200
> Message-ID: <000501c6b5bf$b4cbe480$0200a8c0 at jhsilent>
> 
> Jürgen,
> 
> > Is there any experience as to how much various BBD chips can be
> overclocked?
> > 
> > Asuming the complementary clock signals are not overlapping (with the
> > capacitive
> > load of the BBD connected), and not speaking of signal quality - just how
> > much
> > overclocking can different BBD chips stand without being damaged?
> > Is it safe to say there's no danger as long as the chip doesn't get hot?
> 
> Like CMOS, it is really simple:
> 
> P ~ C*f*V²
> 
> C you can't do much about, f you want to raise, V is the supply voltage. So,
> if you can't ensure propper cooling, lower the supply voltage.
> 
> I don't think you run into any other mechanism of destruction. The
> transistors
> will go into current limitation and you will rather see drop of amplitude
> response.
> 
> Cheers,
> Magnus
> 
>