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  • TI Thinks Resolved

Direct Conversion Transmitter

Hello,

I have a TI 37J84 DAC EVM card.    This has 4 DAC outputs so I can generate baseband differential I,Q PSK signals.  

My question is: What IQ modulator EVM card should I get to implement a direct conversion transmitter?    

The big issue, as you know. is lowering the DC offset so that the carrier does not appear at the RF output.

Any ideas please?

Thanks,

John Reyland

Rockwell Collins, Inc

Cedar Rapids, IA

  • Hi,

    I would recommend the TRF3705 modulator. I believe modulator shares the same (low) Vcm as the DAC37J84 and interfacing them with each other should be a simple process.

    Regards,

    Abdallah
  • Genius 12785 points

    In reply to Abdallah Obidat:

    Please consider the TSW38J84 EVM.
    www.ti.com/.../tsw38j84evm

    This solution provides the IQ modulator and LO synthesizer on board.

    Ken.

    HSDC

    High Speed Products

    HPA

     

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