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Electronic circuits and components * Course Index * Introduction * About the Author * About this Course * Feedback * Course Navigation * How to use this Course * TINA * Locktronics Fundamentals * Introduction: Fundamentals * Units and Multiples * Electricity * Electronic Principles * Electrical Circuits * Alternating Current * Assessment: Fundamentals Passive Components * Introduction: Passive Components * Resistors * Capacitors * Inductors * Transformers * Batteries, Fuses, Lamps and Switches * Assessment: Passive Components Semiconductors * Introduction: Semiconductors * Diodes * Transistors * Logic Gates * Assessment: Semiconductors Passive Circuits * Introduction: Passive Circuits * Series and Parallel Connections * Kirchoff's Laws * Potential and Current Dividers * Passive Time Variant Circuits * Assessment: Passive Circuits Active Circuits * Introduction: Active Circuits * Power Supply Circuits * Operational Amplifier Circuits ## Symbols and Signal Connections ## Power Supply Connections ## Dual Supply Configurations ## Voltage Gain ## Worksheet: Voltage Gain ## Input Resistance ## Output Resistance ## Input Offset Voltage ## Inverting Amplifier ## Worksheet: Inverting Amplifier ## Non-inverting Amplifier ## Worksheet: Non-inverting Amplifier ## Differential Amplifier ## Worksheet: Differential Amplifier ## Direct Coupled Amplifier ## Worksheet: Direct Coupled Amplifier * Transistor Amplifier Circuits * 555 Timer Circuits * Assessment: Active Circuits Parts Gallery * Introduction: Parts Gallery * Passive Component Images * Semiconductor Images * Other Images * Quizzes |
(:Summary:Contains the 'action' links (like Browse, Edit, History, etc.), placed at the top of the page, see site page actions:) (:comment This page can be somewhat complex to figure out the first time you see it. Its contents are documented at PmWiki.SitePageActions if you need help. :) * Print (:comment (:if group Site,SiteAdmin,Cookbook,Profiles,PmWiki*:) (:comment delete if and ifend to enable backlinks:) * %item rel=nofollow class=backlinks accesskey='$[ak_backlinks]'% [[{*$Name}?action=search&q=link={*$FullName} | $[Backlinks] ]] (:ifend:) :) * Login Voltage Gain<^< Dual Supply Configurations | Course Index | Worksheet: Voltage Gain >^>(:nl:) The open-loop voltage gain of an operational amplifier is defined as the ratio of output voltage to input voltage measured with no external feedback applied. Open-loop voltage gain may thus be thought of as the 'internal' voltage gain of the device. In practice, this value is exceptionally high (typically greater than 100,000) but is liable to considerable variation from one device to another. Open-loop voltage gain is the ratio of output voltage to input voltage measured without feedback applied, hence: A'_VOL_' = V'_OUT_'/V'_IN_' where A'_VOL_' is the open-loop voltage gain, V'_OUT_' and V'_IN_' are the output and input voltages respectively under open-loop conditions. In linear voltage amplifying applications, a large amount of negative feedback will normally be applied and the open-loop voltage gain can be thought of as the internal voltage gain provided by the device. The open-loop voltage gain is often expressed in dB rather than as a ratio. In this case: A'_VOL_' = 20log'_10_'(V'_OUT_'/V'_IN_') (:nl:)(:table style="clear:both":)
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