Saturday, October 2, 2010

Q7

What is the major difference in the operation of edge-triggered flip-flops and master slave flipflpos?

2 comments:

  1. edge triggering:
    Positive-edge triggering – the flip-flop output can only change on the positive edges of the clock

    Negative-edge triggering – the flip-flop output can only change on the negative edges of the clock
    Master ff:

    The master is enabled when C = 1 so responds to any input changes during the positive clock cycle. The output Q of the master is transferred to the slave on the negative clock edge (when C = 0).

    The master flip-flop reads the input values on the positive edge of the clock, and the output Q of the master is transferred to the slave on the negative clock edge.

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  2. edge triggered flip flops may cause race around condn whereas master slave flip flops eliminate it...

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