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TLC0838和tlc5620产生的正弦信号

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<DIV class=article_title><A 
href="http://www.ednchina.com/blog/ic668/14243/message.aspx">ISD1400系列芯片的应用 
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<DIV class=article_info>发表于 2007-1-19 18:13:12 </DIV>
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  <TR style="HEIGHT: 56.25pt; mso-yfti-irow: 0; mso-yfti-firstrow: yes">
    <TD 
    style="PADDING-RIGHT: 0cm; PADDING-LEFT: 0cm; BORDER-LEFT-COLOR: #ece9d8; BORDER-BOTTOM-COLOR: #ece9d8; PADDING-BOTTOM: 0cm; BORDER-TOP-COLOR: #ece9d8; PADDING-TOP: 0cm; HEIGHT: 56.25pt; BACKGROUND-COLOR: transparent; BORDER-RIGHT-COLOR: #ece9d8" 
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      <P class=MsoNormal 
      style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-pagination: widow-orphan" 
      align=center><SPAN lang=EN-US 
      style="COLOR: #ff6600; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">ISD1420</SPAN><SPAN 
      style="COLOR: #ff6600; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">单片<SPAN 
      lang=EN-US>20</SPAN>秒高保真语音录放<SPAN lang=EN-US>IC</SPAN></SPAN><SPAN 
      lang=EN-US 
      style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><o:p></o:p></SPAN></P>
      <P class=MsoNormal 
      style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-pagination: widow-orphan" 
      align=left><SPAN 
      style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">　　 
      </SPAN><SPAN lang=EN-US 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">ISD1420</SPAN><SPAN 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">为美国<SPAN 
      lang=EN-US>ISD</SPAN>公司出品的优质单片语音录放电路，由振荡器、语音存储单元、前置放大器、自动增益控制电路、抗干扰滤波器、输出放大器组成。一个最小的录放系统仅由一个麦克风、一个喇叭、两个按钮、一个电源、少数电阻电容组成。录音内容存入永久存储单元，提供零功率信息存储，这个独一无二的方法是借助于美国<SPAN 
      lang=EN-US>ISD</SPAN>公司的专利<SPAN lang=EN-US>--</SPAN>直接模拟存储技术（<SPAN 
      lang=EN-US>DAST TM</SPAN>）实现的。利用它，语音和音频信号被直接存储，以其原本的模拟形式进入<SPAN 
      lang=EN-US>EEPROM</SPAN>存储器。直接模拟存储允许使用一种单片固体电路方法完成其原本语音的再现。不仅语音质量优胜，而且断电语音保护。</SPAN><SPAN 
      lang=EN-US 
      style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><o:p></o:p></SPAN></P></TD></TR>
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    <TD 
    style="PADDING-RIGHT: 0cm; PADDING-LEFT: 0cm; BORDER-LEFT-COLOR: #ece9d8; BORDER-BOTTOM-COLOR: #ece9d8; PADDING-BOTTOM: 0cm; WIDTH: 53%; BORDER-TOP-COLOR: #ece9d8; PADDING-TOP: 0cm; BACKGROUND-COLOR: transparent; BORDER-RIGHT-COLOR: #ece9d8" 
    vAlign=top width="53%">
      <P class=MsoNormal 
      style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" 
      align=left><SPAN 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">一、特点：</SPAN><SPAN 
      lang=EN-US 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><BR><BR></SPAN><SPAN 
      lang=EN-US 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">◎</SPAN><SPAN 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">使用方便的单片录放系统<SPAN 
      lang=EN-US>,</SPAN>外部元件最少</SPAN><SPAN lang=EN-US 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><BR></SPAN><SPAN 
      lang=EN-US 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">◎</SPAN><SPAN 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">重现优质原声，没有常见的背景噪音</SPAN><SPAN 
      lang=EN-US 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><BR></SPAN><SPAN 
      lang=EN-US 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">◎</SPAN><SPAN 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">放音可由边沿或电平触发</SPAN><SPAN 
      lang=EN-US 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><BR></SPAN><SPAN 
      lang=EN-US 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">◎</SPAN><SPAN 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">无耗电信息存储<SPAN 
      lang=EN-US>,</SPAN>省掉备用电池</SPAN><SPAN lang=EN-US 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><BR></SPAN><SPAN 
      lang=EN-US 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">◎</SPAN><SPAN 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">信息可保存<SPAN 
      lang=EN-US>100</SPAN>年<SPAN lang=EN-US>,</SPAN>可反复录放<SPAN 
      lang=EN-US>10</SPAN>万次</SPAN><SPAN lang=EN-US 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><BR></SPAN><SPAN 
      lang=EN-US 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">◎</SPAN><SPAN 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">无需专用编程或开发系统</SPAN><SPAN 
      lang=EN-US 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><BR></SPAN><SPAN 
      lang=EN-US 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">◎</SPAN><SPAN 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">较强的分段选址能力可处理多达<SPAN 
      lang=EN-US>160</SPAN>段信息</SPAN><SPAN lang=EN-US 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><BR></SPAN><SPAN 
      lang=EN-US 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">◎</SPAN><SPAN 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">具有自动节电模式</SPAN><SPAN 
      lang=EN-US 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><BR></SPAN><SPAN 
      lang=EN-US 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">◎</SPAN><SPAN 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">录或放后立即进入维持状态<SPAN 
      lang=EN-US>,</SPAN>仅需<SPAN lang=EN-US>0.5μA</SPAN>电流</SPAN><SPAN 
      lang=EN-US 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><BR></SPAN><SPAN 
      lang=EN-US 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">◎</SPAN><SPAN 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">单一<SPAN 
      lang=EN-US>5</SPAN>伏电源供电 </SPAN><SPAN lang=EN-US 
      style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><o:p></o:p></SPAN></P>
      <P class=MsoNormal 
      style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-pagination: widow-orphan" 
      align=left><SPAN 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">二、电特性：</SPAN><SPAN 
      lang=EN-US 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><BR></SPAN><SPAN 
      lang=EN-US 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">◎</SPAN><SPAN 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">工作电压：<SPAN 
      lang=EN-US>5V</SPAN></SPAN><SPAN lang=EN-US 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><BR></SPAN><SPAN 
      lang=EN-US 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">◎</SPAN><SPAN 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">静态电流：典型值<SPAN 
      lang=EN-US>0.5μA</SPAN>，最大值<SPAN lang=EN-US>2μA</SPAN></SPAN><SPAN 
      lang=EN-US 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><BR></SPAN><SPAN 
      lang=EN-US 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">◎</SPAN><SPAN 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">工作电流：典型值<SPAN 
      lang=EN-US>15mA</SPAN>，最大值<SPAN lang=EN-US>30mA</SPAN>（<SPAN 
      lang=EN-US>16</SPAN>欧姆）</SPAN><SPAN lang=EN-US 
      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><o:p></o:p></SPAN></P></TD>
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      style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">如图</SPAN><SPAN 
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      style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">三、电路外形图引出端功能说明：<SPAN 
      lang=EN-US><BR></SPAN>各管脚功能如下：<SPAN