EE 435 Exam 1 Spring 2005

EE 435 Exam 1 Spring 2005 - 1 EE 435 Exam 1 Spring 2005...

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1 EE 435 Name________________________ Exam 1 Spring 2005 Instructions: You may use up to 2 pages of notes for this exam. All work should be included on this exam – attach additional pages only if more space is needed. There are 10 short questions worth 2 pts each. All problems are weighted equally. On those problems that need technology parameters, assume you are working in a 0.5u CMOS process with process with μ n C OX =100 μ A/v 2 p C OX =30 μ A/v 2 ,V TNO =0.8V, V TPO = - 0.8V, C OX = =2fF/ μ 2 , λ = 0.01v -1 , γ = 0, Cbdbot = 0.5fF/ μ 2 , and Cbdsw = 2.5fF/ μ . Question 1 What is the major benefit of connecting the counterpart circuits in a differential amplifier as a current mirror rather than as two independent current sources? Question 2 If Xin is a current and Xout is a voltage in the basic feedback amplifier, which of the 4 types of amplifiers is the β amplifier? Xin Xout A β Question 3 We saw that the small signal differential voltage gain for a differential amplifier with a tail current source bias was identical to that with a tail voltage bias. What is the major advantage of the circuit with a tail current bias? Question 4 What are the two major benefits of the telescopic cascode amplifier over the folded cascode amplifier structure?
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EE 435 Exam 1 Spring 2005 - 1 EE 435 Exam 1 Spring 2005...

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