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Altera_Forum's avatar
Altera_Forum
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12 years ago

What's the mean of "short cuts"?

I alsways saw the word - short cuts in some materials, as below comments, how to understand it?

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Oftentimes, a low-latency design will require parallelisms, removal of pipelining, and logical short cuts that may reduce the throughput or the max clock speed in a design

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Thanks

2 Replies

  • Altera_Forum's avatar
    Altera_Forum
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    12 years ago

    From a lexical point of view you can look for shortcut in a dictionary (I usually write it without the space).

    In the quoted context it means the designer should find alternate ways to implement the same logic function, in order to optimize time delays.

    In general, you can have many combinatorial nets which are logically equivalent but maybe one of them is faster because the signal passes through a smaller number of logic gates.

    Using a mathematical analogy, if you calculate either 12x34+12x56+12x78 or 12x(34+56+78) you'll get the same result, but the second one is faster.
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    12 years ago

    --- Quote Start ---

    From a lexical point of view you can look for shortcut in a dictionary (I usually write it without the space).

    In the quoted context it means the designer should find alternate ways to implement the same logic function, in order to optimize time delays.

    In general, you can have many combinatorial nets which are logically equivalent but maybe one of them is faster because the signal passes through a smaller number of logic gates.

    Using a mathematical analogy, if you calculate either 12x34+12x56+12x78 or 12x(34+56+78) you'll get the same result, but the second one is faster.

    --- Quote End ---

    Hi Cris 72,

    Thanks, It clear now for me.