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INTEGRATED CIRCUITS EE 2303
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OVERVIEW Introduction What are Op-Amps? Circuit symbol and Pin- Configuration Inverting and Non-inverting modes.. Gain of an Op-Amp.. REFERENCES..
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Introduction Amplifier is a device which senses an input and produces a larger version of it. Amplifiers are used to boost electrical signals in devices (radio, televisions..) Op-Amp: Class of High gain DC Amplifiers with two inputs and Single output
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Symbol & Pin Configuration Inverting Input Non-inverting Input Output
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Inverting and Non-Inverting Inverting Amplifier: Non- Inverting input is grounded. Signal is applied to the Inverting input. Output is 180 o out of Phase. http://www.national.com/onlineseminar/2003/opamps_basics/090303_Opamp_Trivia_Notes.pdf
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Non-Inverting Amplifier Inverting input is grounded. Signal is applied to the Non-Inverting input. Output is in Phase.
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Closed Loop Connection “Output is applied back in to the Inverting Input.” Used in both Inverting and Non- inverting modes of Operation. http://www.national.com/onlineseminar/2003/opamps_basics/090303_Opamp_Trivia_Notes.pdf
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What is Gain?? Gain = Output / Input Gain of Op-Amp (Inverting Mode)=-R f /R 1 Gain of Op-Amp (Non-inverting Mode)=1+R f /R 1
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Inverting Summing Amplifier VOUT=V1+V2
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Op-amp as Oscillator
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Differential and Common mode Common Mode: When both inputs of the signal have the same common voltage.. Output will be zero in the common mode.
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Pre-lab 1.Copy of LM741 Data Sheet ?? 2. What Is CMRR ?? 3. What is Slew Rate ??
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REFERENCES http://www.national.com/onlineseminar/2003/opamps_ba sics/090303_Opamp_Trivia_Notes.pdf http://hyperphysics.phy- astr.gsu.edu/hbase/electronic/opamp.html#c4
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