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TRF37D73: Cascade design?

Mike Neuman
Prodigy 140 points
Part Number: TRF37D73

Are there any reference designs or pointers on how to cascade a TRF37x73? 

For example, are DC blocking caps required between the stages? Is the RF choke required on both stages? Series resistors to help with stability?

Thanks!

  • 0
    Guru 140200 points

    Hi Mike,

    the RF gain block must be driven by a 50R source and must see a 50R load at its output.

    Kai

  • 0
    TI__Mastermind 26215 points

    Hello Mike,

      These devices are already internally matched to 50Ohms. For cascading these RF gain block, each stage would be set in the typical configuration found in TRF37x73's datasheet (Figure 13). You are correct, you would only need one DC coupling capacitor between each stage. So, at the output of the first stage which is at the input of the second stage.

    Thanks!

    Sima