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week02

# week02 - ECE 3150 Spring 2009 Week 2 Recitation Ask for...

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ECE 3150 Spring 2009 Week 2 Recitation Ask for Homework questions first on Homework 1 (you can choose to do Work problems below first) Additional Work problems: 1. Review the Thevenin equivalent circuit by the capacitive divider in Fig. 1.11: First observe it as a capacitive divider (may be in Laplace transform), make sure that this is right when there is no R (cutline looking to left). Now, put in R , v O will be drained according to RC t = R(C 1 +C 2 ) towards 0. Make observations why it is reasonable. Hint: R needs to charge/discharge which capacitor when it is first connected? 2. Prove the following two circuits are equivalent when observing from the external ports (i.e., no external observable relations will change like Thevenin and Norton equivalence) + - v I C 1 C 2 R + v O - + - v t C t R + v O - g m v gs v gs G S D + - i d i s v ds + - D 1/g m g m v gs v gs G S + - i g =0 i d i s v ds + - i g =0

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Review the source absorption and source splitting techniques, then prove the following circuits (from the π network of MOSFET small-signal with infinite input/output resistance to a T network).
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