EE2301Q4F09Sol

# EE2301Q4F09Sol - EE2301 Fall 2009 Introduction to Digital...

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1 University of Minnesota Department of Electrical and Computer Engineering EE2301 Fall 2009 Introduction to Digital System Design L. L. Kinney Quiz IV 1(20) (a) Derive the next state equation for the latch circuit below. (b) Construct the transition table and circle all stable states. (c) Can the signal P be used as Q ? Verify your answer. (d) Does Q + contain any hazards. Verify your answer. (a) Q + = (A + B + G)(B + G + Q)(G + Q) (b) G = 0 G = 1 AB AB Q 00 01 11 10 00 01 11 10 0 0 1 1 0 0 0 0 0 1 0 1 1 1 1 1 1 1 (c) P = GQ ; for Q = 0, G = 0, A = 0 and B = 0, P = 0 Q . (d) The transition QGAB = (0010) (0110) is not covered by any of the sums in Q + ; it is a static-0 hazard.

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2 University of Minnesota Department of Electrical and Computer Engineering
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Unformatted text preview: EE2301 Fall 2009 Introduction to Digital System Design L. L. Kinney Quiz IV 1(20) (a) Derive the next state equation for the latch circuit below. (b) Construct the transition table and circle all stable states. (c) Can the signal P be used as Q ′ ? Verify your answer. (d) Does Q + contain any hazards. Verify your answer. (a) Q + = (A + B + G ′ )(A + G ′ + Q)(G + Q) (b) G = 0 G = 1 AB AB Q 00 01 11 10 00 01 11 10 0 1 1 1 1 1 1 1 0 1 1 1 (c) P = G ′ Q ′ ; for Q = 0, G = 1, A = 0 and B = 0, P = 0 ≠ Q ′ . (d) The transition QGAB = (0001) ↔ (0101) is not covered by any of the sums in Q + ; it is a static-0 hazard....
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EE2301Q4F09Sol - EE2301 Fall 2009 Introduction to Digital...

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