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From: Chris Carlen
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.0.1) Gecko/20020826
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Subject: Re: easy fast rise time pulse generator?
References: <firstname.lastname@example.org> <email@example.com>
Date: Sun, 13 Oct 2002 20:25:12 GMT
NNTP-Posting-Date: Sun, 13 Oct 2002 13:25:12 PDT
Trevor Wilson wrote:
> "Larry Gagnon" wrote in message
>>I require a fast rise time pulse generator to calibrate the vertical
>>amplifier pulse response of my HP1722B oscilloscope. Obviously the
>>pulse marks do not need to be of high frequency train because the
>>scope is calibrated for this at a time/div of only 10 microseconds.
>>Could anyone suggest a simple circuit that would give me a fast rise
>>pulse? Any help greatly appreciated.
> **A 555 driving a Maxim line driver IC (I can't recall the part number) will
> give you 50nS rise time. Maybe less, with careful layout (I managed 30nS).
> I'll post the Maxim IC number later today. It comes in an 8 pin mini-DIP.
I hate to tell you this, but that's not really very fast. Sub 1ns is
what most folks think of when someone comes along asking for "fast pulses."
Christopher R. Carlen
Suse 7.3 Linux 2.4.10
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