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Quiz 3 solution

Quiz 3 solution - Name Student ID The University of British...

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Unformatted text preview: Name: Student ID: The University of British Columbia Department of Electrical and Computer Engineering EECE 201 Project Integrated Program Module 2, Quiz 3 16 November 2009 Time: 50 minutes Notes books calculators etc are NOT allowed. There are three uestions over five 8. es includin the formula sheet}. Good luck! 1. [10 points] Consider the circuit below: 01k Given the “Clk” and “In” waveforms shown below, draw the waveforms at points 1, 2, 3 and 4 on the same graph. Assume that at the very beginning, point 1 is at logic value “0” and point 3 is at logic value “1”. Also assume that the latch and the flip-flop have no delay. Page 1 of 5 Name: Student ID: 2. [15 points] a) Complete the truth table for the circuit below. A Control Wham Wire/=0 {or 315 T“ £>Q(t+m)=o.c-t) 530 when, Cmtroi:i 4! ml a.) T5! spacmhfiék) i. ML 38—") 4’ fl“ 31 it at ' => 7;. meow if;gj_'.f_"j’jlfi‘jffi;* ’fij..ifiQj;i,f,,,..i.,.. i? MHz-c.5130? Olin)” Q (t) (3% ,ars) flchJ . R (if) (I 15f“) IWWZM O b) Ass is 1 ns If the‘ ‘set up time of the flip— flop IS 5 us, what 13 the overall‘ ‘set up ”time of the circuit? C77“: Wci£% Dam mm/wtjé’WFF,‘5 firm» A éfijog £@.'Z+2-+l=6ns @ Omfl 30/571 flimré—j-bl :ilmS Page 2 of 5 Name: Student ID: 3. [25 points] Consider the circuit below: i f 1) 553 7:;ng Wt m4 fad—[we doc/4 edge Assume that each flip-flop has a small delay (much smaller than the clock period, but not negligible) and that the points 1, 2 and 3 are all initially at logic value “0”. ' a) Draw the waveforms for points 1, 2 and 3 on the graph below: Page 3 of 5 Name: Student ID: Problem 2 continued. 9 b) What function is this circuit performing? Briefly explain the behaviour of the JK flip-flops in 2 h this configuration. @ Con/mi [fl (loam/FF? H c) If the delay of each flip-flop is 10 ns, what is the maximum clock frequency that can be used without undermining the Circuit’s proper operation? WM Mara-am?— ficmwrcfir WM 0175 W 3 04/14/4— ?, WW WWW i1; be, W firs/Le» 79m» FFB E, Wt Mm w W :1; MM omit/M m ...
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