<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0035-001X</journal-id>
<journal-title><![CDATA[Revista mexicana de física]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. fis.]]></abbrev-journal-title>
<issn>0035-001X</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Física]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0035-001X2013000400015</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Celda lógica en un sistema bidimensional]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Campos-Cantón]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lozoya-Ponce]]></surname>
<given-names><![CDATA[R. E.]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lozoya-Ponce]]></surname>
<given-names><![CDATA[R.O.]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad Autónoma de San Luis Potosí Facultad de Ciencias ]]></institution>
<addr-line><![CDATA[San Luis Potosí SLP]]></addr-line>
<country>México</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Instituto de Investigación en Comunicación Óptica  ]]></institution>
<addr-line><![CDATA[San Luis Potosí SLP]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2013</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2013</year>
</pub-date>
<volume>59</volume>
<numero>4</numero>
<fpage>359</fpage>
<lpage>363</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0035-001X2013000400015&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0035-001X2013000400015&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0035-001X2013000400015&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Este artículo trata de la instrumentación de una celda lógica binaria basada en el espacio de estados en un sistema bidimensional el cual tiene valores propios distintos. El circuito eléctrico propuesto esta constituido por resistencias, capacitores y comparadores. Esta celda es capaz de generar la función lógica OR y AND.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[This paper is about the implementation of binary logic cells, based on the idea of using state space in a two-dimensional linear system with different real eigenvalues. The proposed circuit is made up of resistors, capacitors and comparators. This cell is capable of generating the logic functions OR and AND.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Retrato de fase]]></kwd>
<kwd lng="es"><![CDATA[electrónica analogica]]></kwd>
<kwd lng="es"><![CDATA[ecuaciones diferenciales ordinarias]]></kwd>
<kwd lng="es"><![CDATA[compuertas lógicas]]></kwd>
<kwd lng="en"><![CDATA[Phase portrait]]></kwd>
<kwd lng="en"><![CDATA[analog electronic]]></kwd>
<kwd lng="en"><![CDATA[differential equations]]></kwd>
<kwd lng="en"><![CDATA[logic gates]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[  	    <p align="justify"><font face="verdana" size="4">Instrumentation</font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>              <p align="center"><font face="verdana" size="4"><b>Celda l&oacute;gica en un sistema bidimensional</b></font></p>              <p align="center"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="center"><font face="verdana" size="2"><b>I. Campos&#45;Cant&oacute;n<sup>a</sup>, R. E. Lozoya&#45;Ponce<sup>b</sup>, and R.O. Lozoya&#45;Ponce<sup>b</sup></b></font></p>              <p align="center"><font face="verdana" size="2">&nbsp;</font></p>          <p align="justify"><font face="verdana" size="2"><i><sup>a</sup> Facultad de Ciencias, Universidad Aut&oacute;noma de San Luis Potos&iacute;, Alvaro Obreg&oacute;n 64, 78000, San Luis Potos&iacute;, SLP, M&eacute;xico,</i> e&#45;mail: <a href="mailto:icampos@fciencias.uaslp.mx">icampos@fciencias.uaslp.mx</a>.</font></p>          <p align="justify"><font face="verdana" size="2"><i><sup>b </sup>Instituto de Investigaci&oacute;n en Comunicaci&oacute;n &Oacute;ptica (IICO), Av. Karakorum 1470 Lomas 4<sup>a</sup> 78210, San Luis Potos&iacute;, SLP M&eacute;xico, </i>e&#45;mail: <a href="mailto:rogeliolozoyaponce@gmail.com">rogeliolozoyaponce@gmail.com</a><a href="mailto:rogeliolozoyaponce@gmail.com"></a>.</font></p>              <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>              ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">Received 7 December 2012     <br> Accepted 21 March 2013</font></p>              <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>              <p align="justify"><font face="verdana" size="2"><b>Resumen</b></font></p>              <p align="justify"><font face="verdana" size="2">Este art&iacute;culo trata de la instrumentaci&oacute;n de una celda l&oacute;gica binaria basada en el espacio de estados en un sistema bidimensional el cual tiene valores propios distintos. El circuito el&eacute;ctrico propuesto esta constituido por resistencias, capacitores y comparadores. Esta celda es capaz de generar la funci&oacute;n l&oacute;gica OR y AND.</font></p>          <p align="justify"><font face="verdana" size="2"><b>Descriptores:</b> Retrato de fase; electr&oacute;nica analogica; ecuaciones diferenciales ordinarias; compuertas l&oacute;gicas.</font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p> 	         <p align="justify"><font face="verdana" size="2"><b>Abstract </b></font></p>              <p align="justify"><font face="verdana" size="2">This paper is about the implementation of binary logic cells, based on the idea of using state space in a two&#45;dimensional linear system with different real eigenvalues. The proposed circuit is made up of resistors, capacitors and comparators. This cell is capable of generating the logic functions OR and AND.</font></p>          <p align="justify"><font face="verdana" size="2"><b>Keywords:</b> Phase portrait; analog electronic; differential equations; logic gates. </font></p>              ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">&nbsp;</font></p>              <p align="justify"><font face="verdana" size="2">PACS: 02.10.Yn; 02.30.Hq; 02.10.Ab; 84.30.Sk; 84.30.Le </font></p>              <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>              <p align="justify"><font face="verdana" size="2"><a href="/pdf/rmf/v59n4/v59n4a15.pdf" target="_blank">DESCARGAR ART&Iacute;CULO EN FORMATO PDF</a></font></p>              <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>              <p align="justify"><font face="verdana" size="2"><b>References</b></font></p>              <!-- ref --><p align="justify"><font face="verdana" size="2">1. H. Peng, Y. Yang, L. Li, and H. Luo, <i>Chaos</i> <b>18</b> (2008) 033101.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=8387843&pid=S0035-001X201300040001500001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>              <!-- ref --><p align="justify"><font face="verdana" size="2">2. S. Sinha and W. L. Ditto, <i>Phys. Rev. Lett.</i> <b>81</b> (1998) 0.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=8387845&pid=S0035-001X201300040001500002&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>  	    ]]></body>
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