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Help on tranceiver design

Discussion in 'Electronic Basics' started by [email protected], Sep 16, 2005.

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  1. Guest


    I want to design a circuit to transmit binary data(NRZ) from one point
    to another by Frequency Shift Keying or any other method. Please
    provide some advice. Also it would be helpful if there are ICs
    available which can be used for this circuit.

    Thanks & Regards,
  2. Tom Biasi

    Tom Biasi Guest

    There are many ICs and circuits.
    Provide more information.
  3. Guest

    I would like the circuit to be used in the following way.

    Transmitter Side:

    Input: Serial binary data taken from a microprocessor.
    Output: FSK modulated signal to be transmited by an antenna.

    Receiver Side:

    Input: FSK modulated signal
    Output: Serial binary data fed to a microprocessor.

    Also since the application will be for mobile devices, power
    consumption should be low.

    Hope I have made myself clear.

    Thanks & Regards,
  4. Jasen Betts

    Jasen Betts Guest

    I have one here, it's called an RS-232 cable and it goes all the way
    from my serial port to my modem...

    how far apart are the two points, how high would you like the bitrate
    to be, what bitrate is acceptable, is a wired connection feasable?
    ISTR AMD came out with a FSK chip back in the 80s it did 300bps full duplex
    and 1200 bps simplex/ half duplex.

    what do you intend to use for a transmission mediium...
    (i mean fsk could be applied to telephone, radio, modulated infrared,
    cassette-tape or even mp3 :)
  5. Rich Grise

    Rich Grise Guest

    Have you tried using the search side of google?

    Good Luck!
  6. Bob Monsen

    Bob Monsen Guest

    For short hops, you can buy a receiver/transmitter pair that works on
    433MHz. Use an HT12E encoder and an HT12D decoder to interface with your
    microprocessor. The achievable datarate is something like 300 bytes/sec.

    Building your own can also be done, but for the price, it's not worth the
    time. Also, you'll have to get it approved by the FCC if it is going into
    a product.
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