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  1. #1
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    Ripple-borrow binary subtraction circuit

    How does this patented ripple-borrow binary subtraction circuit eliminate the need for doing two-complement conversion on the input, thus saves on hardware circuit computation area and time ?

    Last edited by promach; 20th June 2019 at 09:00.

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  2. #2
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    Re: Ripple-borrow binary subtraction circuit

    There is nothing special about the implemented logic. It is a straight-forward "full subtractor". The patent must be about the clever implementation for the borrow output, using "discrete" MOSFETs.
    Maybe it is extra fast because the borrow chain pass through only transmission gates.



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  3. #3
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    Re: Ripple-borrow binary subtraction circuit

    it is extra fast because the borrow chain pass through only transmission gates.
    What are you comparing transmission gates to ?



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