Tutorial 11 - EE 2000 Logic Circuit Design Semester A...

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EE 2000 Logic Circuit Design, Semester A, 2007/08 Tutorial 11 Level 1 Question 1: Parallel Data Storage. This is a typical example of flip-flop used in a basic register for parallel data storage. Sketch the output waveforms. Clk CLR’ Clk CLR’ Q 0 D 3 D 0 1 D 1 D 2 Q 2 Q 1 Q 3 Register cleared Data stored Data stored D 0 D 1 D 2 D 3 Q 0 Q 1 Q 2 Q 3 D C Q Q’ CLR PRE D C Q Q’ CLR PRE D C Q Q’ CLR PRE D C Q Q’ CLR PRE Parallel Data Input Parallel Data Output
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An important application of counter is frequency divider. Sketch the output waveforms and guess which flip-flop is divide-by-2, divide-by-4, divide-by-8, divide-by-16 devices by observing the waveform patterns. Question 3: Binary Counter The counter in last question is binary counter. (a) Is it an upward counter or a downward counter? Please explain briefly. (b) Suggest how to change a downward counter to upward counter (and vise versa) with minimal modification. Clk
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This note was uploaded on 01/11/2011 for the course EE 2000 taught by Professor Vancwting during the Fall '07 term at City University of Hong Kong.

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Tutorial 11 - EE 2000 Logic Circuit Design Semester A...

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