[simpits-tech] RC Timer delay

[Heidner, Troy W]

Stig,

That should work, but you'll still have loading factors putting the RC
network on the front end of an RS latch as well.  The good news is (if
you're using the CMOS device that you sent me the data sheet on) the input
impedance of CMOS devices is VERY high.  So your time constant calculations
should be fairly accurate.  Depending on what kind of delay you need, the
latch has a propagation delay of about 75 nS itself(not much, but who
knows!).

Troy

> -----Original Message-----
> From: Stig Joergensen [mailto:stig.joergensen@clearsky.dk]
> Sent: Friday, February 22, 2002 3:03 PM
> To: simpits-tech@simpits.org
> Subject: RE: [simpits-tech] RC Timer delay
> 
> 
> Thanks Troy
> 
> I see your point....
> 
> And no - the post what not too long (for me at least, just hope others
> got something out of it as well), a fine explanation
> 
> But all this uncertainty got me thinking... perhaps to use a RC
> Latch(4043) instead
> 
> http://www.clearsky.dk/Electronics/icCatalog/MC14043B-D.pdf
> 
> where I bind the Q0 to R0 with this RC delay
> 
> /Stig
> 
> 
> > -----Original Message-----
> > From: Heidner, Troy W [mailto:theidner@ku.edu]
> > Sent: 22. februar 2002 18:20
> > To: 'simpits-tech@simpits.org'
> > Subject: RE: [simpits-tech] RC Timer delay
> > 
> > 
> > Stig,
> > 
> > No, I meant small.  But only in terms of keeping your timing 
> > value accurate.
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