Digital ic slide 43 gate level mux design gate level

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Digital IC Slide 43
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Gate-Level Mux Design Gate Level Mux Design 1 0 (too many transistors) Y SD SD = + How many transistors are needed? 20 D1 D0 S Y 4 4 2 2 Y D1 S 4 2 2 D0 Digital IC Slide 44
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Transmission Gate Mux Nonrestoring mux uses two transmission gates Digital IC Slide 45
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Transmission Gate Mux Nonrestoring mux uses two transmission gates Only 4 transistors S D0 Y S D1 S Digital IC Slide 46
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Inverting Mux Inverting multiplexer Use compound AOI22 Or pair of tristate inverters E ti ll th thi Essentially the same thing Noninverting multiplexer adds an inverter D0 D1 S D0 S S Y D0 D1 Y 0 1 S Y D1 S S S S S Digital IC Slide 47
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4:1 Multiplexer 4:1 mux chooses one of 4 inputs using two selects Digital IC 1: Circuits & Layout Slide 48
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4:1 Multiplexer 4:1 mux chooses one of 4 inputs using two selects Two levels of 2:1 muxes Or four tristates S1S0 S1S0 S1S0 S1S0 D0 S0 D0 D1 0 1 S1 D1 0 1 0 1 Y D2 D3 D2 Y D3 Digital IC Slide 49
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Pass- transistor logic outline Pass
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  • Spring '10
  • FuYuzhuo
  • Logic gate, Transistor Pass Gate

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