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1993-12-21
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Apparently-To: john.smith@gravis.com
GUS Musician's Digest Tue, 21 Dec 93 2:55 Volume 3: Issue 20
Today's Topics:
About those silly inverters...
Music Contest
Standard Info:
- Meta-info about the GUS can be found at the end of the Digest.
- Before you ask a question, please READ THE FAQ.
----------------------------------------------------------------------
Date: Tue, 21 Dec 93 1:55:37 MST
From: Steve "Bongos" Larson <larson@ee.ualberta.ca>
Subject: About those silly inverters...
FWIW,
# Date: Fri, 17 Dec 1993 21:55:53 +1100 (EST)
# From: Iain Huxley <ihuxley@ucc.su.OZ.AU>
# Subject: gus-midi connector --> why 2 inverters??
#
# why would the circuit for a midi connector use 2 inverters?
# Is there some reason for this, or was it just designed by someone who
# didn't know much about electronics?
#
# I would have thought using a buffer (74LS241 will do, from memory) to rpl
# the two inverters would be much better, since it would be faster!
#
# any reason why this would not be the case?
#
=> On the contrary, that circuit designer porbably knew a LOT
about electronics. You're correct, the buffer will do just that,
quite often a signal needs to be delayed WRT another parallel
signal, allowing the device to stablilize at a certain state
(common in asynchronous circuits). Two inverters back to back
like this effectively buffers *and* delays the signal. Hence,
faster is not always better. Recall that the midi bit stream
is the bottleneck, not the gates (~20nS).
Steve Larson, Computer Engineering, Univ. of Alberta
larson@bode.ee.ualberta.ca or larson@amisk.cs.ualberta.ca
------------------------------
Date: Mon, 20 Dec 1993 11:50:49 GMT
From: Clarke Brunt <CLARKE@lsl.co.uk>
Subject: Re: Music Contest
Funny sort of digital music contest when you can apparently
submit any sort of file except MID!
------------------------------
End of GUS Musician's Digest V3 #20
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