ECE201Lect-16 - Operational Amplifiers(4.1-4.3 ECE201...

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ECE201 Lect-16 1 Operational Amplifiers (4.1-4.3)
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ECE201 Lect-16 2 Op Amps Op Amp is short for operational amplifier. An operational amplifier is modeled as a voltage controlled voltage source. An operational amplifier has a very high input impedance and a very high gain.
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ECE201 Lect-16 3 Use of Op Amps Op amps can be configured in many different ways using resistors and other components. Most configurations use feedback.
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ECE201 Lect-16 4 Applications of Op Amps Amplifiers provide gains in voltage or current. Op amps can convert current to voltage. Op amps can provide a buffer between two circuits. Op amps can be used to implement integrators and differentiators. Lowpass and bandpass filters.
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ECE201 Lect-16 5 The Op Amp Symbol + - Non-inverting input Inverting input Ground High Supply Low Supply Output
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ECE201 Lect-16 6 The Op Amp Model + Inverting input Non-inverting input R in v + v - + A ( v + - v - ) v o
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ECE201 Lect-16 7 Typical Op Amp The input resistance R in is very large (practically infinite).
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