[sdiy] Rectifier for logic level pulse?

[Harry Bissell]

Hmmm... rectifying the pulse might be tough... how wide is the pulse ?

If its a square wave it would be easy with passive components, if its a narrow pulse
its quite tough. One side would have to reset very quickly.

H^) harry


----- Original Message -----
From: Antti Huovilainen <ajhuovil at cc.hut.fi>
To: Tim Parkhurst <tim.parkhurst at gmail.com>
Cc: Synth-DIY <synth-diy at dropmix.xs4all.nl>
Sent: Mon, 28 Sep 2009 19:28:30 -0400 (EDT)
Subject: Re: [sdiy] Rectifier for logic level pulse?

On Mon, 28 Sep 2009, Tim Parkhurst wrote:

> Essentially, what I need is a circuit that produces a short 
> positive-going pulse when the input goes low to high (that's the easy 
> part) AND another positive-going pulse when the input goes from high 
> back to low (the not so easy part).

Input ->       C -> R to gnd -> D -> output
       -> -1 -> C -> R to gnd -> D ->

Not exactly precision circuit, but should do the job.

Antti

"No boom today. Boom tomorrow. There's always a boom tomorrow"
   -- Lt. Cmdr. Ivanova
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Harry Bissell & Nora Abdullah 4eva