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📄 power_amplifier_65w_hexfet_eng.htm

📁 内含各国最基础的电路图,并做了详细的说明,对做底层开发的人员很有用.
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              </tr>
              <tr>
                <td width="18%"></td>
                <td width="32%" bgcolor="#FFFFCC"><strong><small><font face="Verdana">THD at 60W into 8
                ohm and 20 HZ....20 KHZ</font></small></strong></td>
                <td width="29%" bgcolor="#FFFFCC" align="center"><small><font face="Verdana">&lt;0.05%</font></small></td>
                <td width="21%"></td>
              </tr>
              <tr>
                <td width="18%"></td>
                <td width="32%" bgcolor="#FFFFCC"><strong><small><font face="Verdana">FREQUENCE RESPONSE
                [at 35W/8ohm, +0...-3dB]</font></small></strong></td>
                <td width="29%" bgcolor="#FFFFCC" align="center"><small><font face="Verdana">1.5
                HZ.....125 KHZ</font></small></td>
                <td width="21%"></td>
              </tr>
              <tr>
                <td width="18%"></td>
                <td width="32%" bgcolor="#FFFFCC"><strong><small><font face="Verdana">INPUT SENSITIVITY</font></small></strong></td>
                <td width="29%" bgcolor="#FFFFCC" align="center"><small><font face="Verdana">1Vrms</font></small></td>
                <td width="21%"></td>
              </tr>
              <tr>
                <td width="18%"></td>
                <td width="32%" bgcolor="#FFFFCC"><strong><small><font face="Verdana">赏PUT IMPEDANCE</font></small></strong></td>
                <td width="29%" bgcolor="#FFFFCC" align="center"><small><font face="Verdana">48K</font></small></td>
                <td width="21%"></td>
              </tr>
              <tr>
                <td width="18%"></td>
                <td width="32%" bgcolor="#FFFFCC"><strong><small><font face="Verdana">SLOW RATE with input
                filter</font></small></strong></td>
                <td width="29%" bgcolor="#FFFFCC" align="center"><small><font face="Verdana">20V/uS</font></small></td>
                <td width="21%"></td>
              </tr>
              <tr>
                <td width="18%"></td>
                <td width="32%" bgcolor="#FFFFCC"><strong><small><font face="Verdana">SIGNAL TO NOISE
                RATIO [at 1W/8ohm]</font></small></strong></td>
                <td width="29%" bgcolor="#FFFFCC" align="center"><small><font face="Verdana">&gt;99dBA</font></small></td>
                <td width="21%"></td>
              </tr>
              <tr>
                <td width="18%"></td>
                <td width="32%" bgcolor="#FFFFCC"><strong><small><font face="Verdana">DAMPING FACTOR at
                8ohm [20HZ...20KHZ]</font></small></strong></td>
                <td width="29%" bgcolor="#FFFFCC" align="center"><small><font face="Verdana">160</font></small></td>
                <td width="21%"></td>
              </tr>
              <tr>
                <td width="18%"></td>
                <td width="32%"></td>
                <td width="29%"><p align="center"><font color="#FFFFFF">.</font></td>
                <td width="21%"></td>
              </tr>
            </table>
            </td>
          </tr>
        </table>
        </td>
      </tr>
    </table>
    <table border="0" width="100%">
      <tr>
        <td width="100%" bgcolor="#FFFFFF"><table border="0" width="100%">
          <tr>
            <td width="33%"></td>
            <td width="33%" bgcolor="#FFFF80"><p align="center"><font color="#800000"><strong>Power
            Supply</strong></font></td>
            <td width="34%"></td>
          </tr>
        </table>
        </td>
      </tr>
    </table>
    <table border="0" width="100%">
      <tr>
        <td width="100%"><p align="center"><img src="POWER_SUPLLY_FOR_AMPLIFIER_B.gif" tppabs="http://users.otenet.gr/~athsam/Circuits/POWER_SUPLLY_FOR_AMPLIFIER_B.gif"
        width="599" height="479" alt="POWER SUPLLY FOR AMPLIFIER 65W HEXFET"></td>
      </tr>
    </table>
    <table border="0" width="100%">
      <tr>
        <td width="100%"><font FACE="Tahoma" SIZE="2" COLOR="#800000"><p ALIGN="JUSTIFY"></font><font
        color="#800000"><small><font face="Verdana">The power supply circuit, is a classic
        circuit. </font></small><font face="Verdana" size="2">Proposed power supply for amplifier
        65W HEXFET is what appears in the above form. It has separated supply for the various
        supply stages, for power output stage, for control stage, for preamplifier supply and for
        protection stage. Whoever wants it can suppress department or add a power supply for each
        channel, separating completely the channels between them. For whoever it does not use the
        preamplifier circuit and protection can suppress proportional coil. </font><font
        face="Tahoma" size="2">In his input exist the soft starting circuit, that combine with the
        delay circuit and protection loudspeakers from DC.</font></font></p>
        <table border="0" width="100%">
          <tr>
            <td width="33%"></td>
            <td width="33%" bgcolor="#FFFF80"><p align="center"><font face="Arial" color="#800000"><small><strong>Output
            Voltages For Power Supply</strong></small></font></td>
            <td width="34%"></td>
          </tr>
          <tr>
            <td width="100%" colspan="3"><table border="0" width="100%">
              <tr>
                <td width="33%"></td>
                <td width="33%"><table border="1" width="100%">
                  <tr>
                    <td width="50%" bgcolor="#FFFFDD"><font FACE="Verdana" SIZE="2"><b>+V1=+35V</b></font></td>
                    <td width="50%" bgcolor="#FFFFDD"><font FACE="Verdana" SIZE="2"><b>-V1=-35V</b></font></td>
                  </tr>
                  <tr>
                    <td width="50%" bgcolor="#FFFFDD"><font FACE="Verdana" SIZE="2"><b>+V2=+12V&nbsp;</b></font></td>
                    <td width="50%" bgcolor="#FFFFDD"><font FACE="Verdana" SIZE="2"><b>-V2=-12V</b></font></td>
                  </tr>
                  <tr>
                    <td width="50%" bgcolor="#FFFFDD"><font FACE="Verdana" SIZE="2"><b>+V3=+35V</b></font></td>
                    <td width="50%" bgcolor="#FFFFDD"><font FACE="Verdana" SIZE="2"><b>-V3=-35V</b></font></td>
                  </tr>
                </table>
                </td>
                <td width="34%"></td>
              </tr>
            </table>
            <p>&nbsp;</td>
          </tr>
        </table>
        <table border="0" width="100%">
          <tr>
            <td width="33%"></td>
            <td width="33%" bgcolor="#FFFF80"><p align="center"><font face="Arial" color="#800000"><small><strong>Part
            List</strong></small></font></td>
            <td width="34%"></td>
          </tr>
        </table>
        </td>
      </tr>
    </table>
    <table border="0" width="100%">
      <tr>
        <td width="33%"><small><font face="Verdana"><strong>T1</strong>=2X25Vac 160VA //2X15Vac
        20VA</font></small></td>
        <td width="33%"><small><font face="Verdana">C5-8=1000uF 25V</font></small></td>
        <td width="33%"><small><font face="Verdana">IC2=<a href="database.htm" tppabs="http://users.otenet.gr/~athsam/database.htm"><strong>7912 </strong></a>Regulator
        </font></small></td>
      </tr>
      <tr>
        <td width="33%"><small><font face="Verdana">T2=2X25Vac 160VA</font></small></td>
        <td width="33%"><small><font face="Verdana">C6-9=100nF 100V MKT</font></small></td>
        <td width="33%"><small><font face="Verdana"><strong>F1</strong>=FUSE 2A slow block</font></small></td>
      </tr>
      <tr>
        <td width="33%"><small><font face="Verdana"><strong>BR1-3</strong>=200V 35A Bridge
        Rectifier </font></small></td>
        <td width="33%"><small><font face="Verdana">C7-10=10uF 25V</font></small></td>
        <td width="33%"><small><font face="Verdana"><strong>S1</strong>=2X2 switch 10A</font></small></td>
      </tr>
      <tr>
        <td width="33%"><small><font face="Verdana">BR2=4 X 1N4002</font></small></td>
        <td width="33%"><small><font face="Verdana">C15=33nF 630V Class X2 </font></small></td>
        <td width="33%"><small><font face="Verdana"><strong>JF1</strong>=3 pole male plug </font></small></td>
      </tr>
      <tr>
        <td width="33%"><small><font face="Verdana"><strong>C1...4-11...14</strong>=10000uF 63V</font></small></td>
        <td width="33%"><small><font face="Verdana"><strong>IC1</strong>=<a href="database.htm" tppabs="http://users.otenet.gr/~athsam/database.htm"><strong>7812</strong></a>
        Regulator </font></small></td>
        <td width="34%"></td>
      </tr>
    </table>
    <table border="0" width="100%">
      <tr>
        <td width="100%"><p align="center"><img
        src="power_amp_65w_b.gif" tppabs="http://users.otenet.gr/~athsam/Circuits/Power_amp_hexfet_65W/power_amp_65w_b.gif" width="755" height="592"
        alt="power AMP. 65W top side"></p>
        <p align="center"><font face="Verdana" color="#FF0000"><small>Fig.2--POWER AMP. 65W HEXFET
        [TOP SIDE] PCB</small></font></p>
        <table border="0" width="100%">
          <tr>
            <td width="100%"><p align="center"><img
            src="power_amp_65w_c.gif" tppabs="http://users.otenet.gr/~athsam/Circuits/Power_amp_hexfet_65W/power_amp_65w_c.gif" width="755" height="560"
            alt="power amp. 65w bottom side"></p>
            <p align="center"><font face="Verdana" color="#FF0000"><small>Fig.3--POWER AMP. 65W HEXFET
            [Bottom side] PCB</small></font></p>
            <p align="center">&nbsp;</td>
          </tr>
        </table>
        </td>
      </tr>
    </table>
    <table border="0" width="100%">
      <tr>
        <td width="100%"><p align="center">&nbsp;</p>
        <div align="center"><center><table border="0" width="100%">
          <tr>
            <td width="100%"><p align="center"><small><strong><font face="Westminster" color="#FF0000">Sam
            Electronic Circuits </font></strong><font color="#FF0000" face="Arial"><small><small>8/02</small></small></font></small></td>
          </tr>
        </table>
        </center></div><div align="center"><center><table border="0" width="100%">
          <tr>
            <td width="100%" bgcolor="#FFFF00"><p align="center"><small><font color="#000000">[ <a
            href="index.htm" tppabs="http://users.otenet.gr/~athsam/index.htm"><strong>Home</strong> </a>] [ <a href="database.htm" tppabs="http://users.otenet.gr/~athsam/database.htm" target="_blank"><strong>My
            Database</strong></a> ] [<a href="guestbook.htm" tppabs="http://users.otenet.gr/~athsam/guestbook.htm" target="_blank"><strong>My Guestbook</strong></a>
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        </center></div></td>
      </tr>
    </table>
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