replace '<A NAME=' with '<A ID='
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node130.html
54
node130.html
@@ -30,50 +30,50 @@ original version by: Nikos Drakos, CBLU, University of Leeds
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<BODY >
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<!--Navigation Panel-->
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<A NAME="tex2html2521"
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<A ID="tex2html2521"
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HREF="node131.html">
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<IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next"
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SRC="next.png"></A>
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<A NAME="tex2html2515"
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<A ID="tex2html2515"
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HREF="node128.html">
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<IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up"
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SRC="up.png"></A>
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<A NAME="tex2html2509"
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<A ID="tex2html2509"
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HREF="node129.html">
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<IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous"
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SRC="prev.png"></A>
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<A NAME="tex2html2517"
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<A ID="tex2html2517"
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HREF="node4.html">
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<IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents"
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SRC="contents.png"></A>
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<A NAME="tex2html2519"
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<A ID="tex2html2519"
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HREF="node201.html">
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<IMG WIDTH="43" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="index"
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SRC="index.png"></A>
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<BR>
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<B> Next:</B> <A NAME="tex2html2522"
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<B> Next:</B> <A ID="tex2html2522"
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HREF="node131.html">Equalizing filters</A>
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<B> Up:</B> <A NAME="tex2html2516"
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<B> Up:</B> <A ID="tex2html2516"
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HREF="node128.html">Taxonomy of filters</A>
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<B> Previous:</B> <A NAME="tex2html2510"
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<B> Previous:</B> <A ID="tex2html2510"
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HREF="node129.html">Low-pass and high-pass filters</A>
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<B> <A NAME="tex2html2518"
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<B> <A ID="tex2html2518"
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HREF="node4.html">Contents</A></B>
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<B> <A NAME="tex2html2520"
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<B> <A ID="tex2html2520"
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HREF="node201.html">Index</A></B>
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<BR>
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<BR>
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<!--End of Navigation Panel-->
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<H2><A NAME="SECTION001212000000000000000"></A>
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<A NAME="sect8.bandpassdef"></A>
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<H2><A ID="SECTION001212000000000000000"></A>
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<A ID="sect8.bandpassdef"></A>
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<BR>
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Band-pass and stop-band filters
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</H2>
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<P>
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A
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<A NAME="10086"></A><A NAME="10087"></A><I>band-pass filter</I>
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<A ID="10086"></A><A ID="10087"></A><I>band-pass filter</I>
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admits frequencies within a given band, rejecting frequencies below it and
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above it. Figure <A HREF="#fig08.03">8.3</A> shows the frequency response of a band-pass
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filter, with the key parameters labelled. A stop-band filter
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@@ -82,7 +82,7 @@ frequencies outside it.
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<P>
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<DIV ALIGN="CENTER"><A NAME="fig08.03"></A><A NAME="10092"></A>
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<DIV ALIGN="CENTER"><A ID="fig08.03"></A><A ID="10092"></A>
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<TABLE>
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<CAPTION ALIGN="BOTTOM"><STRONG>Figure 8.3:</STRONG>
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Terminology for describing the frequency response of band-pass and
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@@ -99,9 +99,9 @@ contiguous stopband surrounded by two passbands.</CAPTION>
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<P>
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In practice, a simpler language is often used for describing bandpass filters,
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as shown in Figure <A HREF="#fig08.04">8.4</A>. Here there are only two parameters: a
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<A NAME="10096"></A><I>center frequency</I>
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<A ID="10096"></A><I>center frequency</I>
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and a
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<A NAME="10098"></A><I>bandwidth</I>.
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<A ID="10098"></A><I>bandwidth</I>.
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The passband is considered to be the region where the filter has at least half
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the power gain as at the peak (i.e., the gain is within 3 decibels of its
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maximum). The bandwidth is the width, in frequency units, of the passband.
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@@ -110,7 +110,7 @@ midpoint of the passband.
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<P>
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<DIV ALIGN="CENTER"><A NAME="fig08.04"></A><A NAME="10102"></A>
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<DIV ALIGN="CENTER"><A ID="fig08.04"></A><A ID="10102"></A>
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<TABLE>
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<CAPTION ALIGN="BOTTOM"><STRONG>Figure 8.4:</STRONG>
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A simplified view of a band-pass filter, showing bandwidth and
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@@ -125,36 +125,36 @@ center frequency.</CAPTION>
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<P>
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<HR>
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<!--Navigation Panel-->
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<A NAME="tex2html2521"
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<A ID="tex2html2521"
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HREF="node131.html">
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<IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next"
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SRC="next.png"></A>
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<A NAME="tex2html2515"
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<A ID="tex2html2515"
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HREF="node128.html">
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<IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up"
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SRC="up.png"></A>
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<A NAME="tex2html2509"
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<A ID="tex2html2509"
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HREF="node129.html">
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<IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous"
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SRC="prev.png"></A>
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<A NAME="tex2html2517"
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<A ID="tex2html2517"
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HREF="node4.html">
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<IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents"
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SRC="contents.png"></A>
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<A NAME="tex2html2519"
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<A ID="tex2html2519"
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HREF="node201.html">
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<IMG WIDTH="43" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="index"
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SRC="index.png"></A>
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<BR>
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<B> Next:</B> <A NAME="tex2html2522"
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<B> Next:</B> <A ID="tex2html2522"
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HREF="node131.html">Equalizing filters</A>
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<B> Up:</B> <A NAME="tex2html2516"
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<B> Up:</B> <A ID="tex2html2516"
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HREF="node128.html">Taxonomy of filters</A>
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<B> Previous:</B> <A NAME="tex2html2510"
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<B> Previous:</B> <A ID="tex2html2510"
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HREF="node129.html">Low-pass and high-pass filters</A>
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<B> <A NAME="tex2html2518"
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<B> <A ID="tex2html2518"
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HREF="node4.html">Contents</A></B>
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<B> <A NAME="tex2html2520"
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<B> <A ID="tex2html2520"
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HREF="node201.html">Index</A></B>
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<!--End of Navigation Panel-->
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<ADDRESS>
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