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

[karl dalen]

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.
> 
> 
>