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	<title>骆驼调频 &#187; lm1875</title>
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		<title>LM1875双电源供电电路及PDF资料</title>
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		<pubDate>Wed, 09 Jul 2008 14:12:19 +0000</pubDate>
		<dc:creator>骆驼</dc:creator>
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		<description><![CDATA[输入信号VIN经过C1耦合到LM1875的1脚，功率放大后从4脚输出加到扬声器。R5、C5串联接在输出端用以抑制高频噪声。正电源+VCC、负电源-VEE分别接在5脚和3脚，并且采用100μF电解电容与0．1μF小电容... ]]></description>
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		<title>LM1875单电源供电电路及PDF资料</title>
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		<pubDate>Wed, 09 Jul 2008 14:04:36 +0000</pubDate>
		<dc:creator>骆驼</dc:creator>
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		<description><![CDATA[LM1875单电源供电与双电源供电的基本工作原理相同，不同之处在于：单电源供电时，采用R1、R2分压，取1／2VCC作为偏置电压经过R3加到1脚，使输出电压以1／2VCC为基准上下变化，因此可以获得最... ]]></description>
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