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OPERATIONAL AMPLIFIERS: Basic Circuits and Applications

Texas A & M UniversityEdgar Sanchez-Sinencio, ELEN 457 OPERATIONALAMPLIFIERS:BasicCircuits and ApplicationsECEN 457 (ESS)Texas A & M UniversityEdgar Sanchez-Sinencio, ELEN 457 Outline of the course Introduction & Motivation op amp Fundamentals Circuits with Resistive Feedback Basic Operators: Differential, Integrator, Low Pass Filters Static op amp Limitations Dynamic op amp Limitations Noise Nonlinear Circuits Signal Generators Voltage Reference and Linear Regulators OPERATIONAL Transconductance Amplifier Analog MultipliersTexas A & M UniversityEdgar Sanchez-Sinencio, ELEN 457 BRIEF op amp HISTORY3-The OPERATIONAL Amplifier( op amp ) was invented in the 40 s. Bell Labs filed a patent in 1941 and many consider the first practical op amp to be the vacuum tube K2-W invented in 1952 by George Instruments invented the integrated circuit in 1958 which paved the way for Bob Widlarat Fairchild inventing the uA702 solid state monolithic op amp in 1963.

Op Amp Fundamentals The Operational Amplifier : •Op Amp is a voltage amplifier with extremely high gain (741, Gain: 200,000 (V/V), Op-77, Gain: 12 (V/uV ) • r d, a, r o are open-loop parameters • v P: Non-inverting v N: Inverting • v 0 = a. v D = a (v P –v N) The Ideal Op Amp: •The virtual input short does not draw any current ...

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