Recent Changes - Search:
<^< Voltage Gain | Course index | Input Resistance >^>

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

OperationalAmplifierCircuits /

Worksheet: Voltage Gain

<^< Voltage Gain | Course Index | Input Resistance >^>(:nl:)

Objective: To investigate the voltage gain of an operational amplifier.
Underpinning knowledge: Operational amplifier symbols and connections.
Apparatus: TINA circuit file, or apparatus to make the following circuit.

TINA Circuit File: Click here to download circuit file
Initial Settings: V'_in1_' = V'_in2_' = 0V, R'_1_' = R'_2_' = 100k&#937;
Requires: Paper, Linear graph paper, pen or pencil.
Instructions:

(a) Set V'_in1_' (the voltage at the '+' terminal) and V'_in2_' (the voltage at the '-' terminal) to 0V

(b) Measure and record the values of V'_in1_', V'_in2_' and V'_out_' (using VM1).

(c) Repeat (b) for each of the following conditions:

* V'_in1_' = +5mV and V'_in2_' = 0V * V'_in1_' = 0V and V'_in2_' = +5mV * V'_in1_' = -5mV and V'_in2_' = 0V * V'_in1_' = 0V and V'_in2_' = -5mV * V'_in1_' = +5mV and V'_in2_' = +5mV * V'_in1_' = -5mV and V'_in2_' = -5mV

Observations:

(a) Comment on the results obtained when V'_in1_' = V'_in2_' = 0V. Is this what you would have expected?

(b) Comment on the results obtained when V'_in1_' > V'_in2_'. Is this what you would have expected?

(c) Comment on the results obtained when V'_in1_' < V'_in2_'. Is this what you would have expected?

(d) What can you say about the internal voltage gain of the operational amplifier?

Further work:

Obtain a set of manufacturers characteristics for a common type of operational amplifier. What value of voltage gain is specified by the manufacturer? (If this is specified in 'dB' convert the value to a ratio). Does this support what you have said in (d)?

(:nl:)(:table style="clear:both":)

(:Summary: Website page footer:)

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:) :) Search - Login

Page last modified on July 28, 2011, at 11:28 AM