I've never been happy with the digital one-shots. The analog ones start more or
less right away, but end when they time out, and that depends on component
variation and system power supply noise. The digital ones start when they're
good and ready and end a precise amount of time later. Until we get everything
to run from femtosecond clocks, presuming that a femtosecond will be
insignificant, and don't mind that the desired delay requires 100 bit-long
ripple counters, there'll always be the debate. Now that passives cost more
than registers, it will probably favor the digital types, though.
Dick
----- Original Message -----
From: "ajp166" <ajp166_at_bellatlantic.net>
To: <classiccmp_at_classiccmp.org>
Sent: Wednesday, October 24, 2001 7:34 PM
Subject: Re: What people "should" know
> Here here! One-shots are fine for pule shortening or stretching
> so long as it's non-critical.
>
> Worst abuse, Altair 8800 front pannel.
>
and maybe the second-worst is the ALTAIR CPU.
>
> One of the best designs that use a oneshot was the PERCOM
> Cassette board, it was a digitial oneshot and predictable.
>
If its period was predictable, how did one predict when it started?
>
> Allison
>
> -----Original Message-----
> From: Richard Erlacher <edick_at_idcomm.com>
> To: classiccmp_at_classiccmp.org <classiccmp_at_classiccmp.org>
> Date: Wednesday, October 24, 2001 9:12 PM
> Subject: Re: What people "should" know
>
>
> >That's why it's been common practice to fire anyone who uses one-shots
> >(monostables) for anything. I personally believe it should go beyond
> that, in
> >that the perpetartor of such a heinous crim should be barred from
> asserting his
> >credentials as a circuit designer for a short period, of, say, 10
> decades.
>
>
>
Received on Wed Oct 24 2001 - 22:19:56 BST