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Unformatted text preview: Page 4 Signed Inequalities b Operands b If highorder bit is 0 then the number is positive b If highorder bit is 1 then the number is 2s complement (negative) b Comparisons b If both numbers positive: b If one positive, one negative: b If both numbers negative: CMPT 150 Arithmetic Operations Page 5 Sequential Circuits b A logic circuit is sequential if the current output values depend on past as well as current input values. b Assembled by combining combinational circuits with memory emory elements are called ip ops b Memory elements are called flipflops b Initial attempts at building a flipflop: x y x Problem: CMPT 150 Arithmetic Operations Page 6 SR Latch b If S=0 and R=0 b b If S=1 and R=0 b S x b b If S=0 and R=1 b b b If S=1 and R=1 b b b R Q S R Q(t+1) 0 0 0 1 1 0 1 1 Characteristic Table...
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This note was uploaded on 04/27/2011 for the course CMPT 150 taught by Professor Dr.anthonydixon during the Spring '08 term at Simon Fraser.
 Spring '08
 Dr.AnthonyDixon

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