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Design - Microcomputer Interfacing Laboratory - Exam

Exams, Microcomputers

Post: April 1st, 2013
Description
Main points of this exam paper are: Design, Circuit, Suppresses, Hold Amplifier, Sensing Changes, Digital Circuit, One Output
Main points of this exam paper are: Design, Circuit, Suppresses, Hold Amplifier, Sensing Changes, Digital Circuit, One Output
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Name (Last, First) UNIVERSITY OF CALIFORNIA College of Engineering Electrical Engineering and Computer Sciences Department EECS 145M: Microcomputer Interfacing Laboratory Spring Midterm #1 (Closed book- calculators OK) Wednesday, February 21, 1996 PROBLEM 1 (25 points) You have just tested an 8-bit D/A circuit by making measurements of its output glitches. Your measurements show that after all possible changes in input bit patterns at time t, the output glitch begins no earlier than t + 10 ns and is essentially gone after t + 30 ns. The output ranges from V1 = 0 volts to V255 = 2.55 volts. You decide to design and build a circuit that does the following: • Uses the D/A converter, but suppresses output glitches by sensing changes in the input and using a sample and hold amplifier. • Has accurate conversion at 0 Hz. You have available the following components: 1 A digital circuit that has 8 inputs and one output (normally low). If the input bits change at time t, the output goes hig..

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