Saturday, 18 February 2012

Sequential Logic Circuits


  • Combinational circuit output depends only on present input
  • Sequential circuit output depends on both present inputs and past outputs
  • Hence memory elements are present in feedback path. Memory elements can be flip-flops or latches
  • Sequential circuits are two types
    1. Synchronous sequential circuits
    2. Asynchronous sequential circuits
  • In synchronous sequential circuit every operation is synchronized with an external clock.
  • In asynchronous sequential circuits operations are not synchronized with clock. 

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