Path: utzoo!attcan!uunet!lll-winken!lll-tis!helios.ee.lbl.gov!pasteur!ucbvax!bloom-beacon!FINGATE.BITNET!ayl%hutds.hut.fi
From: ayl%hutds.hut.fi@FINGATE.BITNET (Antti Ylikoski)
Newsgroups: comp.ai.digest
Subject: Sigmoid function
Message-ID: <19880823023320.8.NICK@HOWARD-JOHNSONS.LCS.MIT.EDU>
Date: 23 Aug 88 02:33:00 GMT
Sender: daemon@bloom-beacon.MIT.EDU
Organization: The Internet
Lines: 22
Approved: ailist@ai.ai.mit.edu

Date: Sat, 20 Aug 88 13:06 EDT
From: Antti Ylikoski <ayl%hutds.hut.fi%FINGATE.BITNET@MITVMA.MIT.EDU>
To: AIList@AI.AI.MIT.EDU
Subject: Sigmoid function
cc: ayl@hutds.hut.fi



One way to build a circuit that produces the true sigmoid function
would be to store the value-argument pairs into a ROM and use the
following circuit:
f
           |-----------------|  |------|  |-----------------|
input ---> | A / D converter |->|  ROM |->| D / A converter | ---> output
           |-----------------|  |------|  |-----------------|

Antti (Andy) Ylikoski
Helsinki University of Technology (I think a better translation would be
Helsinki Institute of technology)
Digital Systems Laboratory
YLIKOSKI@FINFUN.BITNET
OPMVAX::YLIKOSKI        (DECnet)
mcvax!hutds!ayl         (UUCP)