[Test-Equipment] Need to shift pulse up 5V

[Barry]

Finally got around to trying this and it works great!  2 x 10k resistors and a 2N3904 gave me what I needed.

Thanks,
Barry - N4BUQ

----- Original Message -----
> From: "Mike Manes" <mrmanes at gmail.com>
> To: "Discussion of Electronic Test Equipment" <test-equipment at mailman.qth.net>
> Sent: Friday, May 1, 2015 10:44:46 AM
> Subject: Re: [Test-Equipment] Need to shift pulse up 5V
> 
> The common-base NPN (2N3904, e.g.) previously suggested by ?? is truly
> elegant.  Ground the base, run a 4.7K from the emitter to the -5V
> clock and run another 4.7K from the collector to a +5V bus.  Take the
> 0 to +5 clock from the collector.  Two bits and 3 parts - how much
> simpler can ya get?
> 73 de Mike W5VSI
> 
> On 5/1/15 8:43, Barry wrote:
> > Ah yes - a comparator.  I like that idea and I should have thought of it.
> > I wish Radio Shack had an equivalent for the 311.
> >
> > Thanks!
> > Barry - N4BUQ
> >
> > ----- Original Message -----
> >> From: "Barry" <n4buq at knology.net>
> >> To: "Test Equipment" <test-equipment at mailman.qth.net>
> >> Sent: Thursday, April 30, 2015 11:37:27 PM
> >> Subject: [Test-Equipment] Need to shift pulse up 5V
> >>
> >> I have a situation where a clock signal is pulsed to 0V from a normally
> >> -5V
> >> signal level.  I would like to have that same waveform shifted +5V (e.g.
> >> the
> >> pulse would go from 0V to +5V instead of -5V to 0V).
> >>
> >> Is there a convenient way to do this?  I thought this might be a somewhat
> >> common problem and there would be a selection of "level shifting" chips
> >> but
> >> I'm not finding that to be true.  I assume that if there's no dedicated IC
> >> for this kind of thing, then perhaps a simple single transistor circuit
> >> might do the trick but thought I'd ask first if there are any
> >> off-the-shelf
> >> "standard" solutions to this.
> >>
> >> Thanks,
> >> Barry - N4BUQ
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