lesson11

lesson11 - Lesson 11 Signal Transfer and Interface...

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10 V 10 k + _ V OUT Interface 10 k Lesson 11 – Signal Transfer and Interface Design (Section 3-6) (CLOs 3-4 and 3-5) This is a key lecture for students to understand circuit limitations. In this type of interface circuit design loading is not bad – it is intentional! We have taught students that any linear circuit could be reduced to its Thévenin equivalent. Hence, we will work with a Thévenin circuit to develop the maximum value of voltage v MAX , current i MAX, and power p MAX . It is important to have the students understand is that there is a maximum value of v, i and p that can be obtained from a circuit regardless of the selection of load resistor. The Thévenin voltage is the maximum voltage – and it can only be obtained with R L being an open circuit. The maximum current is the Norton current – and that requires R L to be a short circuit. These are not very interesting or useful loads. Max power is obtained only when the load R L matches the R T – and that is only half the power supplied by the source. You may wish to
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This note was uploaded on 10/12/2010 for the course MAE 140 taught by Professor Mauriciodeoliveria during the Spring '08 term at UCSD.

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lesson11 - Lesson 11 Signal Transfer and Interface...

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