<?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>S0035-001X2006000400015</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[A new type of analog cosine converter]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Kawecki]]></surname>
<given-names><![CDATA[Leszek]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Mexican National Technological Institute (IPN) Unidad Zacatenco Postgraduate Studies and Investigation Section, Mechanical and Electric Engineering School]]></institution>
<addr-line><![CDATA[D.F. ]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2006</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2006</year>
</pub-date>
<volume>52</volume>
<numero>4</numero>
<fpage>387</fpage>
<lpage>393</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0035-001X2006000400015&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0035-001X2006000400015&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0035-001X2006000400015&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[This paper presents the synthesis and the computer-aided design for a new type of analog dynamic converter which carries out the mathematical operation of the cosine function. The lab investigation results of static and dynamic precision of this converter are also included.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[El artículo presenta la síntesis y diseno computarizado de un nuevo tipo del convertidor analógico dinámico el cual realiza la operación de funcion de coseno. También se presentan los resultados de investigación en el laboratorio de la exactitud estática y dinámica de este convertidor.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Analog converters]]></kwd>
<kwd lng="en"><![CDATA[signal processing]]></kwd>
<kwd lng="es"><![CDATA[Convertidores analógicos]]></kwd>
<kwd lng="es"><![CDATA[procesamiento de señales]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="justify"><font face="verdana" size="4">Instrumentaci&oacute;n</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="4"><b>A new type of analog cosine converter</b></font></p>     <p align="center"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="2"><b>Leszek Kawecki</b></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><i>Postgraduate Studies and Investigation Section, Mechanical and Electric Engineering School, Mexican National </i><i>Technological Institute (IPN), </i><i>Unidad Zacatenco, Edificio #5, 3er piso, 07738 M&eacute;xico D.F., M&eacute;xico, e&#150;mail: <a href="mailto:lkawecki@ipn.mx">lkawecki@ipn.mx</a></i></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2">Recibido el 29 de junio de 2006    <br> Aceptado el 1 de agosto de 2006</font></p>     ]]></body>
<body><![CDATA[<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 presents the synthesis and the computer&#150;aided design for a new type of analog dynamic converter which carries out the mathematical operation of the cosine function. The lab investigation results of static and dynamic precision of this converter are also included.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Keywords: </b>Analog converters; signal processing.</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">El art&iacute;culo presenta la s&iacute;ntesis y diseno computarizado de un nuevo tipo del convertidor anal&oacute;gico din&aacute;mico el cual realiza la operaci&oacute;n de funcion de coseno. Tambi&eacute;n se presentan los resultados de investigaci&oacute;n en el laboratorio de la exactitud est&aacute;tica y din&aacute;mica de este convertidor.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Descriptores: </b>Convertidores anal&oacute;gicos; procesamiento de se&ntilde;ales.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2">PACS: 07.50.Qx; 84.30.&#150;r</font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><a href="/pdf/rmf/v52n4/v52n4a15.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>Referencias</b></font></p>     <!-- ref --><p align="justify"><font face="verdana" size="2">1. L. Kawecki and T. Niewierowicz, Dynamic Cosine Converter (in Spanish) Mexican Institute for Industrial Property Patent Registration N&deg; 190046 Mexico, October 8, 1998.</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=8357191&pid=S0035-001X200600040001500001&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. L. Kawecki, <i>Rev. Mex. Fis. </i><b>49</b> (2003) 450.</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=8357192&pid=S0035-001X200600040001500002&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. Shih&#150;Chii Liu, T. Delbruck, G. Indiveri, and J. Kramer, <i>Analog </i><i>VLSI: Circuits and Principles </i>(MIT Press October 2002).</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=8357193&pid=S0035-001X200600040001500003&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. S. Franco, <i>Design with Operational Amplifiers and Analog Integrated Circuits </i>(McGraw&#150;Hill 1998).</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=8357194&pid=S0035-001X200600040001500004&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. Ramon Pallas&#150;Areny, J.G. Webster, <i>Analog Signal Processing </i>(John Wiley and Sons, 1999).</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=8357195&pid=S0035-001X200600040001500005&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --> ]]></body><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kawecki]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Niewierowicz]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<source><![CDATA[Dynamic Cosine Converter (in Spanish)]]></source>
<year>Octo</year>
<month>be</month>
<day>r </day>
<publisher-name><![CDATA[Mexican Institute for Industrial Property]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kawecki]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<source><![CDATA[Rev. Mex. Fis.]]></source>
<year>2003</year>
<volume>49</volume>
<page-range>450</page-range></nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Liu]]></surname>
<given-names><![CDATA[Shih-Chii]]></given-names>
</name>
<name>
<surname><![CDATA[Delbruck]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Indiveri]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Kramer]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Analog VLSI: Circuits and Principles]]></source>
<year>Octo</year>
<month>be</month>
<day>r </day>
<publisher-name><![CDATA[MIT Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Franco]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<source><![CDATA[Design with Operational Amplifiers and Analog Integrated Circuits]]></source>
<year>1998</year>
<publisher-name><![CDATA[McGraw-Hill]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pallas-Areny]]></surname>
<given-names><![CDATA[Ramon]]></given-names>
</name>
<name>
<surname><![CDATA[Webster]]></surname>
<given-names><![CDATA[J.G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Analog Signal Processing]]></source>
<year>1999</year>
<publisher-name><![CDATA[John Wiley and Sons]]></publisher-name>
</nlm-citation>
</ref>
</ref-list>
</back>
</article>
