AFE7769: Mismatch Compensation Algorithm

Kazuki Itoh

Part Number: AFE7769

Hi team,

I have promoted my customer AFE77XX. My customer is interested in how it compensate. The product folder description mentions that it does not need to inject any specific signal, and it does the calibration continuously. My customer has mainly two questions.

1. Does AFE77XX compensate the mismatch continuously, not only start-up?

2. How AFE77XX compensate the mismatch without test signals?

Regards,

Itoh

over 4 years ago

0 Kang Hsia over 4 years ago

TI__Guru 66014 points

Hi Itoh-san,

You may refer to below app note, last section for some brief intro on TX QMC

0 Kazuki Itoh over 4 years ago in reply to Kang Hsia

TI__Genius 9165 points

Hi Kang-san,

Thank you for your reply.

Answer for #1 should be "It runs compensation algorithm both start-up and on-line", right?

But I don't understand the answer of #2.

Could you please elaborate on that?

Regards,

Itoh

0 Satish Uppathil over 4 years ago in reply to Kazuki Itoh

TI__Expert 3515 points

Itoh-san,

If your question is regarding RX QMC - then it can be run continuously and doesn't need any specific test signal.

if it's regarding TX QMC - it's run only when triggered by the host (FPGA/ASIC). We recommend it to be run with the regular data. i.e., no specific test signal are needed.

Please email me if this doesn't answer your question adequately.

Regards,

satish.

0 Kazuki Itoh over 4 years ago in reply to Satish Uppathil

TI__Genius 9165 points

Hi Satish-san,

Thank you for your help.

So, you mean it uses regular data as test signal both for TX and RX?

Regards,

Itoh

0 Kang Hsia over 4 years ago in reply to Kazuki Itoh

TI__Guru 66014 points

Hi Itoh-san,

Yes, the AFE777xx does use live data for calibration of QMC

-Kang

RF & microwave

RF & microwave forum

AFE7769: Mismatch Compensation Algorithm