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Why cascaded inverters are used in the multiplexer when it is possible to realize the circuit using a single inverter.

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The front inverters are used to buffer the input signal. Without the front inverters inputs A and B would be 3 load units each instead of 1, since you would have to drive both the rear inverters as well as both of the and gates used with the input's term in the multiplexer logic.

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  • \$\begingroup\$ front inverters means inverters on the right side ? \$\endgroup\$ – tollin jose Apr 1 '14 at 6:12
  • \$\begingroup\$ On the left side. The ones on the right side are used for logic purposes. \$\endgroup\$ – Ignacio Vazquez-Abrams Apr 1 '14 at 6:12
  • \$\begingroup\$ "Without the front inverters inputs A and B would be 3 load units each instead of 1." Can you please elaborate this point ? \$\endgroup\$ – tollin jose Apr 1 '14 at 6:15
  • \$\begingroup\$ @tollin: Updated. \$\endgroup\$ – Ignacio Vazquez-Abrams Apr 1 '14 at 6:17
  • \$\begingroup\$ @IgnacioVazquez-Abrams please make it more clear..? \$\endgroup\$ – BASIL VARGHESE Apr 1 '14 at 10:02

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