ME345_Lecture_26

# ME345_Lecture_26 - theoretical gain of the circuit(at any...

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M E 345 Spring 2008 Professor John M. Cimbala Lecture 26 03/21/2008 Today, we will : Finish reviewing the pdf module: Op-Amps (CMRR and GBP effects) Do some example problems – Op-amp circuits Do C a n d y Q u e s t i o n s f o r C a n d y F r i d a y

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Example Given : We need to amplify the output of a microphone (music converted into voltage) by a factor of 1000. We construct a noninverting amplifier as sketched, with: o R 1 = 1 k Ω o R 2 = 999 k Ω V p V n + V o R 2 R 1 V out V in To do : ( a ) Calculate the
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Unformatted text preview: theoretical gain of the circuit (at any frequency) if the op-amp were ideal. ( b ) Calculate the actual gain for a type 741 op-amp, with GBP = 1.0 MHz at the following frequencies of the music: o f = 20 Hz (lower limit of human hearing) o f = 261.63 Hz (middle C) o f = 4000 Hz = 4 kHz (a fairly high note) o f = 20 kHz (upper limit of human hearing) ( c ) Suggest a better circuit. Solution :...
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ME345_Lecture_26 - theoretical gain of the circuit(at any...

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