From ROBERTS@pharm.som.sunysb.edu Fri Jan 12 09:17:18 1996
From: ROBERTS@pharm.som.sunysb.edu
    12 Jan 96 12:17:12 +0500
Organization:  Pharmacology, SUNY Stony Brook
Date:          Fri, 12 Jan 1996 12:22:00 EST
Subject:       Forwarded: EMC/Datasheet book errors
Priority: normal

From:          barry.klein@solar.org (Barry Klein)
Subject:       EMC/Datasheet book errors
Date:          Fri, 12 Jan 1996 06:05:00 GMT
Organization:  The Solar System BBS, Mission Viejo, CA 714-837-9677

ARRRRRRGGGGGGGHHHHHH!!!!!
More screwups on my part.....

First, the SSM2020 exponential/linear VCA circuit of Fig. 6-17 on
page 172 has a couple errors.  The 15K and 39K resistors
off the EXP./LIN. switch should not connect to the two transistors
(pin 5(11)).  They should only go to the "-" input of IC2.  SAMS
did me a "favor" and added a line.  Finally, the labels on the
switch should be reversed (my error).  As with many of the circuits
in the book, you may need to tweak values of resistors to get
things just right.  The circuit has appeared in Electronotes and
SSM literature a little differently.  My version was an effort to
combine both linear and exponential functionality in one module.
All 3 circuits differ in the resistors chosen for the CV.  I made
two dual VCA modules for my system that worked fine (until I had
to steal a 2020 for a dead Prophet 5 - still need one if someone
has one they'd sell).

AND................

I really screwed up with the EM Datasheet book and neglected to
include the following SSM IC's:
2000
2010
2020
2022
2030
2033
2040
2050
2055
2056	

Surprised no-one brought it to my attention!

I have datasheets for all but the 2010 and 2055, although these are
discussed in the EMC book and I can at least include pin diagrams.
Anyone have the real data sheets for these?

I will organize this stuff and send out packets of copies of these
to those who have purchased the Datasheet book in the past.  Also,
if you know of any SSM/CES IC's that I'm missing and have the data,
let me know and I'll put it in too.  I may also make up some additional
sheets giving pin diagrams of common op amps and transistors.  I'll
place an announcement here when these packets go out.

Thanks/sorry,

Barry.klein@solar.org


... Elect. Music, Photography, Bubble Machines, Stunt Kites, Elect. Design

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