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Unformatted text preview: University of California, Berkeley Fall 2011 EECS 142 Prof. A. Niknejad Problem Set 2 Due Tuesday September 13, 2011 1. Consider a common source amplifier driving a terminated transmission line of 50. Suppose that you must design this amplifier to drive the load with a given voltage gain A v and bandwidth specification 1 . In this problem youll explore the design trade-offs involved in the design of a common-source amplifier. Assume square-law characteristics. (a) Since the amplifier is biased through a load resistor, find a design constraint based on the DC headroom requirements. Suppose the amplifier is biased at mid-rail for maximum swing (ignore the saturation voltage for simplicity). (b) Write an expression for the gain of the amplifier as a function of only the device overdrive voltage ( V * = V gs V t ) and the load resistance R D . Use the results of the previous problem to do this simplification. (c) Write an expression for the bandwidth of the amplifier. Assume a dominant pole and R s 50 (input pole dominates). Assume that the gate-drain capacitance C gd = C gs and write an expression that involves the maximum obtainable...
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This note was uploaded on 01/12/2012 for the course EECS 142 taught by Professor Ee142 during the Fall '04 term at University of California, Berkeley.
- Fall '04