PCB单端带状线阻抗计算器
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<table cellpadding="0" cellspacing="0" class="vwtb"><tbody><tr><td id="article_content"><script type="text/javascript">
//单端带状线阻抗
function Stripline_impedance_calc()
{
var w=Number(document.getElementById("input2_w").value*document.getElementById("input2_w_unit").value);
if (w>0)
{
var t=Number(document.getElementById("input2_t").value*document.getElementById("input2_t_unit").value);
var h=Number(document.getElementById("input2_h").value*document.getElementById("input2_h_unit").value);
var er=Number(document.getElementById("input2_er").value);
var z;
z=60/Math.sqrt(er) * Math.log(1.9*(2*h+t)/(0.8*w+t));
}
else
{
z=0
}
document.getElementById("input2_z").value= z.toPrecision(4);
}
</script>
<table class="gridtable">
<tbody><tr>
<th colspan="4" class="apphot">PCB单端带状线阻抗计算器</th>
</tr>
<tr>
<td>线宽(w):</td>
<td><input id="input2_w" value="4" name="input2_w" type="text"></td>
<td><select name="input2_w_unit" id="input2_w_unit">
<option value="1" selected="selected">mil</option>
<option value="39.37">mm</option>
</select></td>
<td rowspan="5"><div align="center"><p><img src="/template/rtj1009_010/image/jisuan/dddzx.jpg" data-bd-imgshare-binded="1"></p></div></td>
</tr>
<tr>
<td>铜厚(t):</td>
<td><input id="input2_t" value="1" name="input2_t" type="text"></td>
<td><select id="input2_t_unit" name="input2_t_unit">
<option value="1.37795" selected="selected">oz/in.^2</option>
<option value="1">mil</option>
<option value="0.03937">um</option>
<option value="39.37">mm</option>
</select></td>
</tr>
<tr>
<td>介质厚度(h):</td>
<td><input name="input2_h" id="input2_h" value="6" type="text"></td>
<td><select id="input2_h_unit" name="input2_h_unit">
<option value="1" selected="selected">mil</option>
<option value="0.03937">um</option>
<option value="39.37">mm</option>
</select></td>
</tr>
<tr>
<td>介电常数(er):</td>
<td><input name="input2_er" id="input2_er" value="4.2" type="text"></td>
<td> </td>
</tr>
<tr>
<td><input name="input1_cmd" class="eda_input_btn" id="input1_cmd" onclick="Stripline_impedance_calc()" value="开始计算(Z)" type="button" style="color: red;font-size: 19px;"></td>
<td><input name="input2_z" class="eda_input_res" id="input2_z" value="50.19" type="text"></td>
<td>OHM</td>
</tr>
<tr>
<td colspan="4">说明:以上计算结果仅供参考</td>
</tr>
</tbody></table></td></tr></tbody></table>
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PCB常用阻抗设计及叠层
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