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Operational amplifier
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==== Input breakdown voltage ==== The transistors Q3, Q4 help to increase the reverse ''V''<sub>BE</sub> rating; The base-emitter junctions of the NPN transistors Q1 and Q2 break down at around 7{{nbsp}}V, but the PNP transistors Q3 and Q4 have ''V''<sub>BE</sub> breakdown voltages around 50{{nbsp}}V.<ref>[http://ecow.engr.wisc.edu/cgi-bin/get/ece/342/schowalter/notes/chapter10/theua741operationalamplifier.ppt The ΞΌA741 Operational Amplifier]{{dead link|date=June 2016|bot=medic|fix-attempted=yes}}{{cbignore|bot=medic}}</ref>
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