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Discussion in 'Electronic Basics' started by [email protected], Aug 20, 2005.

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  1. Guest

    I need to divide two 10 bit numbers.I would like to know if any kind of
    chip is readily available or what would be the best circuit for
    implementing this(A circuit for a higher number of bits like 16 will
    also do).Any help in this regard would be appreciated.

  2. Rich Webb

    Rich Webb Guest

    Not enough information. Is this for homework to demonstrate the concept
    using discrete logic gates, or for "real" work where there may be other
    constraints, such as throughput, footprint, cost, integration with other
    components, etc.?

    Absent any other information, a reasonable answer to your question is:

    unsigned short divide(unsigned short dividend, unsigned short divisor)
    return dividend / divisor;

    or we could instantiate a 10-bit divider in VHDL or some flavor of
    assembly language or ...
  3. Guest

    This is one part of a project I am doing and not just to illustrate the
    concept.As long as the circuit gives the output by some 500ms at the
    maximum and doesnt take up a power of more than 200mW its ok.Also i
    would like to avoid using some microcontroller or pic as i feel it
    would be an overkill.
  4. Kitchen Man

    Kitchen Man Guest

    On 20 Aug 2005 21:06:58 -0700, wrote:

    [Re: want ten-bit integer divider]
    Perhaps a ROM or similar device, pre-programmed with a ten-bit answer
    dependant on the ten-bit input?
  5. Rich Webb

    Rich Webb Guest

    [Please include context in replies. Yes, the Google usenet interface
    sucks. "Do no evil"? Feh!]

    Is there nothing else that the project needs to do? It would seem that
    building this out of discrete logic would be overkill. If a
    microcontroller is a bad fit, how about a CPLD?

    How are the ten bits presented to the front end of the divider block?
    How do you want the results presented at the back end?
  6. Jasen Betts

    Jasen Betts Guest

    A $5 microcontroller, plus $5 worth of extra hardware
    could do it,

    I doubt there's a cheaper way, of course you'd need a programmer for the
    micro, if you make one of them too and shop at an expeisive hobby store
    call it $50

  7. Ken Moffett

    Ken Moffett Guest

    Or, you could go with a Picaxe-40 uC. ~$10.00 for the 40 pin chip, 2
    resistors, a 3-wire serial cable, and free PBasic programming/loading
    software. 32 I/O lines, so 2 sets of 10 bits in and 1 set of 10 bits out.
    Not sure about the current consumption, but a lot of that depends on what
    you're driving, and if 200mW is a maximum peak or average consumption.
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