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UNIVERSITY OF CALIFORNIA AT BERKELEY College of Engineering Dept. of Electrical Engineering and Computer Sciences Problem Set # 6 Due Tuesday, March 14, 2005. EE 105 Spring 2006 1. A simple current source along with device data is shown below. a. Find (W/L) 1 such that the incremental voltage source resistance of the reference voltage generated by M 1 is equal to 1k Ω . b. Find (W/L) 2 such that I out = 300 μ A. c. Find the incremental source resistance of the current source. 2. In the multiple MOS current source and sink shown below, assume (W/L) R = (W/L)
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Unformatted text preview: 4 = 10/2. Assume all devices are operating in the saturation region and neglect the back-gate effect. a. Find (W/L) 1 such that I out1 = 40uA. b. Find (W/L) 2 such that I out2 = 100uA. c. Find (W/L) 3 such that I out3 = 250uA. 3. A PMOS common-source amplifier with parameters is shown below. a. Draw the small signal model for this circuit. b. Calculate the value of V BIAS such that V O = 0V when V IN = 0V. c. Calculate the small signal parameters g m and r o . d. Find the small signal midband gain for this amplifier....
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