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	<title>Mastering Electronics Design&#187; output resistance</title>
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	<link>http://masteringelectronicsdesign.com</link>
	<description>Electronics Design and Modeling with Emphasis on Analog Design</description>
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		<title>The Non-Inverting Amplifier Output Resistance</title>
		<link>http://masteringelectronicsdesign.com/the-non-inverting-amplifier-output-resistance/</link>
		<comments>http://masteringelectronicsdesign.com/the-non-inverting-amplifier-output-resistance/#comments</comments>
		<pubDate>Wed, 23 Dec 2009 07:38:58 +0000</pubDate>
		<dc:creator>Adrian S. Nastase</dc:creator>
				<category><![CDATA[Analog Design]]></category>
		<category><![CDATA[Operational Amplifier Formulas]]></category>
		<category><![CDATA[dependent sources]]></category>
		<category><![CDATA[non-inverting]]></category>
		<category><![CDATA[op amp]]></category>
		<category><![CDATA[op amp (opamp) formulas]]></category>
		<category><![CDATA[operational amplifier]]></category>
		<category><![CDATA[output resistance]]></category>

		<guid isPermaLink="false">http://masteringelectronicsdesign.com/?p=1003</guid>
		<description><![CDATA[It is customary to consider the output resistance of the non-inverting amplifier as being zero, but why is that?  An Op Amp’s own output resistance is in the range of tens of ohms.  Still, when we connect the Op Amp in a feedback configuration, the output resistance decreases dramatically.  Why?


Related posts:<ol><li><a href='http://masteringelectronicsdesign.com/the-common-collector-amplifier-input-and-output-resistance/' rel='bookmark' title='Permanent Link: The Common-Collector Amplifier Input and Output Resistance &#8211; The Proof'>The Common-Collector Amplifier Input and Output Resistance &#8211; The Proof</a></li><li><a href='http://masteringelectronicsdesign.com/how-to-derive-the-inverting-amplifier-transfer-function/' rel='bookmark' title='Permanent Link: How to Derive the Inverting Amplifier Transfer Function'>How to Derive the Inverting Amplifier Transfer Function</a></li><li><a href='http://masteringelectronicsdesign.com/how-to-derive-the-transfer-function-of-the-inverting-summing-amplifier/' rel='bookmark' title='Permanent Link: How to Derive the Transfer Function of the  Inverting Summing Amplifier'>How to Derive the Transfer Function of the  Inverting Summing Amplifier</a></li></ol>]]></description>
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		<title>The Common-Collector Amplifier Input and Output Resistance &#8211; The Proof</title>
		<link>http://masteringelectronicsdesign.com/the-common-collector-amplifier-input-and-output-resistance/</link>
		<comments>http://masteringelectronicsdesign.com/the-common-collector-amplifier-input-and-output-resistance/#comments</comments>
		<pubDate>Mon, 12 Oct 2009 07:15:02 +0000</pubDate>
		<dc:creator>Adrian S. Nastase</dc:creator>
				<category><![CDATA[Analog Design]]></category>
		<category><![CDATA[Thevenin's Theorem]]></category>
		<category><![CDATA[Transistor Circuits]]></category>
		<category><![CDATA[amplifier]]></category>
		<category><![CDATA[BJT]]></category>
		<category><![CDATA[common-collector]]></category>
		<category><![CDATA[dependent sources]]></category>
		<category><![CDATA[input resistance]]></category>
		<category><![CDATA[output resistance]]></category>
		<category><![CDATA[proof]]></category>
		<category><![CDATA[transistor]]></category>
		<category><![CDATA[voltage follower]]></category>

		<guid isPermaLink="false">http://masteringelectronicsdesign.com/?p=814</guid>
		<description><![CDATA[In this article I will show a method to deduce the input and output resistance of the common collector amplifier.  The common-collector amplifier is a well known circuit (see Figure 1).  It is mostly used as a buffer due to its high input resistance, small output resistance and unity gain buffer.  The equations derived in this article are symbolic, as is the derivation of any other formula in this website.  Still, even if the resistances’ values are not numeric, the equations are intuitive enough to show the high input low output resistance property of the amplifier.


Related posts:<ol><li><a href='http://masteringelectronicsdesign.com/derive-the-transfer-function-of-the-common-collector-amplifier-with-thevenins-theorem/' rel='bookmark' title='Permanent Link: Derive the Transfer Function of the Common Collector Amplifier with Thevenin&#8217;s Theorem'>Derive the Transfer Function of the Common Collector Amplifier with Thevenin&#8217;s Theorem</a></li><li><a href='http://masteringelectronicsdesign.com/the-non-inverting-amplifier-output-resistance/' rel='bookmark' title='Permanent Link: The Non-Inverting Amplifier Output Resistance'>The Non-Inverting Amplifier Output Resistance</a></li><li><a href='http://masteringelectronicsdesign.com/differential-amplifier-output-common-mode-voltage-calculator/' rel='bookmark' title='Permanent Link: Differential Amplifier Output Common-Mode Voltage Calculator'>Differential Amplifier Output Common-Mode Voltage Calculator</a></li></ol>]]></description>
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