ECE 2020 Midterm: ECE 2020 GT sp14 lw Exam 2
15 Feb 2019
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Instructions: this is a closed book, closed note exam. If you have a question, raise your hand and i will come to you. Please work the exam in pencil and do not separate the pages of the exam. Part a (8 points) suppose the circuit below has the following input priority: i1 > i3 > i0 > i2. Complete the truth table by filling in the input values that would produce the given outputs and derive a simplified expression for o1. Part b (3 points) consider a priority encoder with the following behavior: List the inputs (in0, in1, and in2) in decreasing priority. highest priority. Part c (6 points) implement a 2-input xor gate with pass gates and inverters only. (hint: remember that a 2-input xor is a selective inverter. ) Support your answer by giving the transistor count for each: Part a (10 points) convert the following notations: binary notation.
