[sdiy] 1 bit serial stream delay approaches..

[Jean-Pierre Desrochers]

Thanks Chris,

That's a good approach so far..
An other hardware apprach would have been with a binary counter and
a 8096x8bits RAM used in a shift registering way.
In this case I would in fact have 8 delayed gate signal usable.
JP


 On Wed 19/09/12 11:59 , ChristianH chris at chrismusic.de sent:
> Um, that would only work if the ON/OFF events are more apart than the
> delay time. Probably not what he wants. And you would need 2
> oneshots, one for each edge polarity.
> 
> Not sure if there (still) are longer shift registers than 8 bits. Oh
> yeah, back in the good old times... 
> A couple of years ago you might have misused a BBD for that, SNR should
> be sufficient for binary signals :-)
> 
> Would I'd probably do: a micro controller, use a 16 bit timer as a
> quasi-realtime clock, and a sequencer-like event FIFO. Each input edge
> writes a timestamped event record into the fifo, and a read routine
> calculates the out event times, and generates the output signal when
> that time has come.
> Surely this requires programming, but compared to a software
> implementedshift register this saves lots of RAM without compromising timing
> resolution. But then, I am a programmer from birth, and that may affect
> decisions like this...
> 
> Chris
> 
> 
> 
> On Wed, 19 Sep 2012 07:34:41 -0700 blacet at blac
> et.com wrote:
> > ---A CMOS one-shot? 4538?
> > 
> > > I'm on my way to design a delayed GATE
> generator module> > for my Dotcom synth.
> > > So I need to delay a 1 bit serial stream
> (incoming Gate signal)> > for up to 5 sec. (my needs). I thought of
> the shift register way> > to do it but I'm not willing to use a ton
> of cmos IC's..> > Maybe a Microchip PIC would do with a
> reliable interupt routine.> > But would it exist any IC that does this
> job easily> > without any programming ?
> > > In fact a 1 bit digital delay without any
> ADC-DAC is what I need.> > Remember, the incoming Gate signal can be
> anyhthing else> > than a simple ON... then OFF
> state.> >  (ex:
> ON.......OFF..ON..OFF..ON...........OFF...etc..)> >
> > > Any clues ?
> > > JP
> 
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