3 Design A Circuitwhichusesansn74138demultiplexerto Implementa Sum Of Products Expression As Follows 33 A Convertthe 1 (131.77 KiB) Viewed 52 times
3.Design a circuitwhichusesanSN74138demultiplexerto implementa sum-of-products expression, as follows: 33 (a) Convertthefollowingexpressionintosummationform(i.e.F(A,B,C)=Σ(...)): Y = f(A, B, C) = ABC + BC (b) Thedemultiplexeroutputisselected,andwillgolow,bytheaddressoninputsA,B,andC whenthelCisenabled. Therefore, wecancreatetheoutputfunction Ybysummingtogetherthe outputs form of the expression. Since indicatedbythesummation theoutputsofthedemultiplexerareactive- low,thisisdonewithaNANDgate.Connecteachofthe TRUE mintermoutputs ofthedemultiplexerin Figure 3.2 (indicatedbythesummationequation)toan inputoftheNANDgate.Connectall unusedNANDinputstologic1. A AZ YOO BA1 Y10- C. AQ Y20- Y30- Y Y40- Y50- Y60- Y70
3.4PRE-LAB 1.Prepareall sectionsand Handoutall therequireddesignstoyourteachingassistant. 2.Design a circuitwhichusesanSN74151 toimplementa sum-of-products expression, as follows: (a)Convertthe followingexpressionintosummationform(i.e.F(A,B,C)=(...)): Y = f(A, B, C) = AB + BC (b) Sketch on figure 3.1 the input connections necessary to implement the functionin(a). A2 A1 AO D7 ABC D6 ABC DS ABC D4 ABC D3 ABC D2 ABC D1 ABC DO ABC Figure 3.1:8-to-1 Multiplexer HBCL 1
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