采用电流负反馈式横流装置
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当然扩流是必不可少的<br />看看这篇**,关于恒流源的简单说明<br /><br />http://blog.21ic.com/user1/4346/archives/2007/42190.html <br /> 相关链接:<a href='http://blog.21ic.com/user1/4346/archives/2007/42190.html'>http://blog.21ic.com/user1/4346/archives/2007/42190.html</a>
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