<?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>S0035-001X2007000300002</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Nonlinear element of a chaotic generator]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Campos-Cantón]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Murguía]]></surname>
<given-names><![CDATA[J.S.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Campos Cantón]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chavira-Rodríguez]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Departamento de Físico Matemáticas  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="A02">
<institution><![CDATA[,Universidad Autonóma de San Luis Potosí  ]]></institution>
<addr-line><![CDATA[San Luis Potosí SLP]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2007</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2007</year>
</pub-date>
<volume>53</volume>
<numero>3</numero>
<fpage>159</fpage>
<lpage>163</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0035-001X2007000300002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0035-001X2007000300002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0035-001X2007000300002&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[A mathematical model of a nonlinear electronic circuit, which is the core of the electronic chaotic oscillator, is presented. This mathematical model or nonlinear function has a direct relationship with the values of the components used to build an experimental electronic system. In order to get a good approximation to the characteristic response curve of the nonlinear circuit, the mathematic model considers the current-voltage curve of nonlinear elements.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Se presenta un modelo matemático de un circuito electrónico no lineal, el cual es el corazón del oscilador caótico. Este modelo matemático o función no lineal tiene una relación directa con los valores de los componentes usados para construir el sistema electrónico experimental, de tal forma que, para obtener una buena aproximación a la curva de respuesta característica del circuito no lineal, el modelo matemático considera la curva de corriente-voltaje de los elementos no lineales.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Chaotic oscillator]]></kwd>
<kwd lng="en"><![CDATA[bifurcation parameter]]></kwd>
<kwd lng="en"><![CDATA[nonlinear converter]]></kwd>
<kwd lng="es"><![CDATA[Oscilador caótico]]></kwd>
<kwd lng="es"><![CDATA[parámetro de bifurcación]]></kwd>
<kwd lng="es"><![CDATA[convertidor no lineal]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="justify"><font face="verdana" size="4">Investigaci&oacute;n</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="4"><b>Nonlinear element of a chaotic generator</b></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="2"><b>E. Campos&#150;Cant&oacute;n&ordf;, J.S. Murgu&iacute;a&ordf;, I. Campos Cant&oacute;n<sup>b</sup>, and M. Chavira&#150;Rodr&iacute;guez&ordf;</b></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><i>&ordf; Departamento de F&iacute;sico Matem&aacute;ticas,</i> e&#150;mails:  <a href="mailto:ecamp@uaslp.mx">ecamp@uaslp.mx</a>, <a href="mailto:ondeleto@uaslp.mx">ondeleto@uaslp.mx</a></font></p>     <p align="justify"><font face="verdana" size="2"><i><sup>b</sup> Fac. de Ciencias, Universidad Auton&oacute;ma de San Luis Potos&iacute;, &Aacute;lvaro Obreg&oacute;n 64, 78000, San Luis Potos&iacute;, SLP, M&eacute;xico, </i>e&#150;mails: <a href="mailto:icampos@galia.fc.uaslp.mx">icampos@galia.fc.uaslp.mx</a>, <a href="mailto:mchavira@uaslp.mx">mchavira@uaslp.mx</a></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2">Recibido el 17 de febrero de 2006    ]]></body>
<body><![CDATA[<br>   Aceptado el 4 de mayo de 2007</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">A mathematical model of a nonlinear electronic circuit, which is the core of the electronic chaotic oscillator, is presented. This mathematical model or nonlinear function has a direct relationship with the values of the components used to build an experimental electronic system. In order to get a good approximation to the characteristic response curve of the nonlinear circuit, the mathematic model considers the current&#150;voltage curve of nonlinear elements.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Keywords: </b>Chaotic oscillator; bifurcation parameter; nonlinear converter.</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">Se presenta un modelo matem&aacute;tico de un circuito electr&oacute;nico no lineal, el cual es el coraz&oacute;n del oscilador ca&oacute;tico. Este modelo matem&aacute;tico o funci&oacute;n no lineal tiene una relaci&oacute;n directa con los valores de los componentes usados para construir el sistema electr&oacute;nico experimental, de tal forma que, para obtener una buena aproximaci&oacute;n a la curva de respuesta caracter&iacute;stica del circuito no lineal, el modelo matem&aacute;tico considera la curva de corriente&#150;voltaje de los elementos no lineales.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Descriptores: </b>Oscilador ca&oacute;tico; par&aacute;metro de bifurcaci&oacute;n; convertidor no lineal.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">PACS: 05.45.&#150;a; 05.45.Pq</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/v53n3/v53n3a2.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>Acknowledgements</b></font></p>     <p align="justify"><font face="verdana" size="2">This work was partially supported by FAI&#150;UASLP 2006 under contracts C06&#150;FAI&#150;03&#150;11.14 and C06&#150;FAI&#150;03&#150;16.19</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. L.O. Chua, L. kocarev, K. Eckert, and M. Itoh, <i>Int. J. Bif. and Chaos </i><b>2</b> (1992) 705.</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=8332401&pid=S0035-001X200700030000200001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p align="justify"><font face="verdana" size="2">2. T.L. Carroll, <i>Am. J. Phys. </i><b>63</b> (1995) 377.</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=8332402&pid=S0035-001X200700030000200002&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p align="justify"><font face="verdana" size="2">3. N.F. Rulkov, <i>Chaos </i><b>6</b> (1996) 262.</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=8332403&pid=S0035-001X200700030000200003&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p align="justify"><font face="verdana" size="2">4. N.F. Rulkov and M.M. Sushchik, <i>Int. J. Bif. and Chaos </i><b>7</b> (1996) 625.</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=8332404&pid=S0035-001X200700030000200004&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p align="justify"><font face="verdana" size="2">5. H.D.I. Abarbanel, T.W. Frison, and L.S. Tsimring, <i>IEEE Signal Processing Magazine </i><b>3</b> (1998) 49.</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=8332405&pid=S0035-001X200700030000200005&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --> ]]></body><back>
<ref-list>
<ref id="B1">
<label>1</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Chua]]></surname>
<given-names><![CDATA[L.O.]]></given-names>
</name>
<name>
<surname><![CDATA[kocarev]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Eckert]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Itoh]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<source><![CDATA[Int. J. Bif. and Chaos]]></source>
<year>1992</year>
<numero>2</numero>
<issue>2</issue>
<page-range>705</page-range></nlm-citation>
</ref>
<ref id="B2">
<label>2</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Carroll]]></surname>
<given-names><![CDATA[T.L.]]></given-names>
</name>
</person-group>
<source><![CDATA[Am. J. Phys.]]></source>
<year>1995</year>
<numero>63</numero>
<issue>63</issue>
<page-range>377</page-range></nlm-citation>
</ref>
<ref id="B3">
<label>3</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rulkov]]></surname>
<given-names><![CDATA[N.F.]]></given-names>
</name>
</person-group>
<source><![CDATA[Chaos]]></source>
<year>1996</year>
<numero>6</numero>
<issue>6</issue>
<page-range>262</page-range></nlm-citation>
</ref>
<ref id="B4">
<label>4</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rulkov]]></surname>
<given-names><![CDATA[N.F.]]></given-names>
</name>
<name>
<surname><![CDATA[Sushchik]]></surname>
<given-names><![CDATA[M.M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Int. J. Bif. and Chaos]]></source>
<year>1996</year>
<numero>7</numero>
<issue>7</issue>
<page-range>625</page-range></nlm-citation>
</ref>
<ref id="B5">
<label>5</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Abarbanel]]></surname>
<given-names><![CDATA[H.D.I.]]></given-names>
</name>
<name>
<surname><![CDATA[Frison]]></surname>
<given-names><![CDATA[T.W.]]></given-names>
</name>
<name>
<surname><![CDATA[Tsimring]]></surname>
<given-names><![CDATA[L.S.]]></given-names>
</name>
</person-group>
<source><![CDATA[IEEE Signal Processing Magazine]]></source>
<year>1998</year>
<numero>3</numero>
<issue>3</issue>
<page-range>49</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
