Le1_12lb - Physics 395, Laboratory 12 Operational...

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Physics 395, Laboratory 12 Operational Amplifiers Overview The purpose of these experiments is to measure the basic parameters of an operational amplifier, including gain, bias, and noise rejection, and to use operational feedback to form an amplifier. Background An operational amplifier (op-amp) is a differential amplifier with very high gain, very high input impdance, and very low output impedance. The 741A op-amp is an integrated circuit thaat comes in an 8-pin dual in-line package (DIP). The connections for the chip looking down with the notch facing up is: The op-amp is specified as an amplifier by the gain A 0 , input impedance Z in , and output imped- ance Z out . The op-amp also has specifications as a differential amplifier for the input bias current I B which is the average input current, an input offset current I io which is the difference in input currents, and an input voltage offset V io . The behavior of the op-amp is V out = A 0 ( v + - v - ). For
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This note was uploaded on 10/02/2009 for the course PHYS 460 taught by Professor Johnson,c during the Spring '08 term at Northern Illinois University.

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Le1_12lb - Physics 395, Laboratory 12 Operational...

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