ME345_Lecture_25

ME345_Lecture_25 - M E 345 Spring 2008 Professor John M....

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M E 345 Spring 2008 Professor John M. Cimbala Lecture 25 03/19/2008 Today, we will : Continue the example from last time, which we did not quite finish. Continue reviewing the pdf module: Op-Amps (noninverting amps, active filters, and clipping circuits; if time, also cover CMRR and GBP) Do some more example problems – op-amps Discuss an additional item not in the pdf notes: Input loading and the significance of input impedance Example from last time (continued) Given : Two voltage input signals, V 1 and V 2 are to be combined as follows to produce an output voltage: ( ) o1 2 43 VV V =+ . To do : Design a circuit that will produce this output, using only op-amps and resistors. Assume that the only resistors you have are 20 k Ω . Solution : Last time we did a “brute force” circuit, needing 5 op-amps and 16 resistors. Now let’s design a more efficient circuit that will do the same job.
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Example Given : Consider the circuit shown.
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ME345_Lecture_25 - M E 345 Spring 2008 Professor John M....

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