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How to bypass FIR filters in AD9371?

Question asked by Se-woong on Jun 20, 2018
Latest reply on Jun 28, 2018 by srimoyi



My customer are designing new FIR filter (in FPGA) because FIR performance in AD9371 doesn’t meet their repeater requirement.

For this , they wants to bypass FIR filters in AD9371 like below picture



1.  - They want to bypass TFIR/ RFIR. Is it possible?

     - If it possible, how to bypass TFIR/ RFIR?

     - If they do the bypass TFIR/RFIR, is the delay of transmit path & receive path reduced?


2.  -  If they can’t do bypass TFIR/RFIR, how to control the coefficient of Filters?

     - How to extract the coefficient of Filters in AD9371?Filter

     - Zero IF fiducially, Passband: 0~49.2MHz,   Stopband: 50.8MHz,  Stopband Attenuation: Over 50dB


Please advise me.