practice_mod4

# practice_mod4 - ECE 270 Module 4-1Practice Homework 1 Draw...

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ECE 270 – Module 4 -1- Practice Homework ______________________________________________________________________________ 1. Draw a circuit that implements the following next state equations (assume each gate has a delay of τ ), where A and B are the inputs to the circuit: X(t+ τ ) = A(t) •Y (t) Y(t+ τ ) =X(t) B (t) ______________________________________________________________________________ 2. Complete the PS-NS Table for the circuit in Problem 1, below: PS PI NS X(t) Y(t) A(t) B(t) X(t+ τ ) Y(t+ τ ) 0 0 0 0 0 0 0 1 0 0 1 0 0 0 1 1 0 1 0 0 0 1 0 1 0 1 1 0 0 1 1 1 1 0 0 0 1 0 0 1 1 0 1 0 1 0 1 1 1 1 0 0 1 1 0 1 1 1 1 0 1 1 1 1

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ECE 270 – Module 4 -2- Practice Homework ______________________________________________________________________________ 3. Construct a state transition diagram for the circuit in Problem 1: ______________________________________________________________________________ 4. Fill in the timing chart for the circuit in Problem 1, below. Note the initial conditions. τ A B X Y
ECE 270 – Module 4 -3- Practice Homework ______________________________________________________________________________ 5. Given the following state transition diagram, complete the timing chart below. Note the initial conditions. AB XY 00 10 00 00 01 d1 01 1d 11 0d 10 10 11 d1 d0 A B X Y

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ECE 270 – Module 4 -4- Practice Homework ______________________________________________________________________________ 6. Given the circuit for an S -R latch, below: ______________________________________________________________________________ (a) Write the next state equations (assume each gate has a delay of τ ): Q(t+ τ ) = ______________________________________________ QN(t+ τ ) = _____________________________________________ ______________________________________________________________________________ (b) Complete a PS-NS table: Present State Q(t) QN(t) Present Inputs: S_L(t) R_L(t) 0 0 0 1 1 0 1 1 0 0 0 1 1 0 1 1
ECE 270 – Module 4 -5- Practice Homework ______________________________________________________________________________ (c)

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## This note was uploaded on 02/12/2012 for the course ECE 270 taught by Professor Staff during the Spring '08 term at Purdue.

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practice_mod4 - ECE 270 Module 4-1Practice Homework 1 Draw...

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