Specifications  Microsoft PowerPoint  V12 Apex total.ppt SLR 
Business section 

Specifications  Microsoft PowerPoint  V12 Apex total.ppt SLR 
Business section 

Specifications  Microsoft PowerPoint  V12 Apex total.ppt SLR 
Suggested Link Details/Purchase 

Content  9 Before we discuss nonlinear operation, we will cover some of the basics of linear operation for that mythical creature, the ideal op amp . The three most importantcharacteristics of an ideal op amp are: 1. Infinite input impedance 2. Zero output impedance 3. Infinite open loop gain Let s review the inverting configuration in light of these threebasic characteristics. #1 dictates that the input current into the op amp is 0. #3 implies that any voltageappearing between the input terminals will result in infinite output voltage. The resistive divider actionof Rf and Ricauses a portion of the output voltage to be fed back to the inverting input. It is this NEGATIVE FEEDBACK action coupled with #3, open loop gain, that keeps the voltage between the two inputs atzero. In the inverting configuration, this results in a virtual ground node. The concept of a virtual ground, coupled with the zero input current flow, allows the closed loop gain or transfer function of the circuit to be easily calculated. Current flow in Riis equal to Vin/Ri. The same current is forced to flow through Rf, giving an output voltage of IinRf. In the noninverting amplifier, the infinite open loop gain of the amplifier, coupled with negative feedback, force the inverting terminal to be equal to the noninverting terminal. This sets up a voltage across Ri which develops a current that also flows through Rf. Therefore,the total output voltage is s Vin/Rin current times the series combination of Rf and Ri. Ref. AN 31 Ri = 0 Vin LINEAR OPERATION BASICS Rf Vo Ri Vp+ Iin Iin= 0 Vin+Vo = 0 RiRf = Vp Vo= –Vin Rf Vm Vp+ Vo Vin Ri Rf – Iin VmVm Vo Vm –Vin+ 0 –Vin Ri Rf = Vp= Vin Iin= 0 RfRi = 0 Vo= Vin(1 + ) – 
Navigation  Previous Page / Next Page 
Following Datasheets  OpticsBrochure_5 (8 pages) outline_pack_infoe_5 (3 pages) OverviewRadResultsIROC_1 (4 pages) PA3_E_LowPower_HBs_1 (10 pages) PA3_E_PIB_1 (10 pages) PA3_E_Tech_WP_1 (18 pages) pabp_01 (5 pages) pabp_02 (7 pages) package_diode_5 (5 pages) packaging_auto_1 (18 pages) 
Check in eportals  WorldHNews Products Extensions Partners Automation Jet Parts 
Sitemap Folder  group1 group2 group3 group4 group5 group6 group7 group8 group9 group10 group11 group12 group13 group14 group15 group16 group17 group18 group19 group20 group21 group22 group23 group24 group25 group26 group27 group28 group29 group30 group31 group32 group33 group34 group35 group36 group37 group38 group39 group40 group41 group42 group43 group44 group45 group46 group47 group48 group49 group50 group51 group52 group53 group54 group55 group56 group57 group58 group59 group60 group61 group62 group63 group64 group65 group66 group67 group68 group69 group70 group71 group72 group73 group74 group75 group76 group77 group78 group79 group80 group81 group82 group83 group84 group85 group86 group87 group88 group89 group90 group91 group92 group93 group94 group95 group96 group97 group98 group99 group100 Prewious Folder Next Folder 