SV: Re: SV: Re: [sdiy] BBD clock circuit

[jhaible at debitel.net]

What Harry said ... an open collector or open emitter output 
won't work.

JH.

> Im not so shure what you actually ment or what it is you 
> trying to achivev but there isnt so many ways to drive a BBD.
> If you for instance take a 4046 run its vco out trough the 
> Xor gate then you get the two off phase signals to
> drive the BBD the same is with switching regulators
> with the added benefit for adjusting dedband and/ or
> the actuall pulse width!
> 
> KD
> 
> --- "JH." <jhaible at debitel.net> skrev:
> 
> > >> I saw the gates that prevent overlapping: but the output
> > >> is just a half-bridge, i.e. two transistors for driving
> > >> a center tapped transformer for pus-pull operation.
> > >> For a BBD, I think I need a full H-Bridge - that's why I was asking.
> > >>
> > >I think you mean "totem pole" output ???
> > >
> > >An H bridge would be a four transistor structure with a floating load...
> > >you don't need
> > >that for a BBD (which suck, btw :^) which is single ended at the clock
> > 
> > I'm never so sure about using the right words. But if totem pole, then two
> > totem poles (for the two clock inputs). Now in switched power supplies,
> > you use two totem poles (=  one H bridge) to drive a floating winding
> > indeed.
> > So even if in the BBD application you wouldn't call it H-bridge, you might
> > call it H-bridge in a switcher IC that you want to (ab)use as BBD driver.
> > 
> > JH.
> > 
> > 
> > 
> 
> 
> 




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