LMH0303: what kind of role of the inductor play in SDO output chain

Nan Zhang

Part Number: LMH0303

Hi team,

Could you please help me to understand why we need to 6.8nH inductor parallel 75ohm in SDO signal chain? Could you please tell me that why we choose such value of inductor and resistor？

I understand that the 4.7uF is used to isolate the DC, but feel confused on inductor and resistor?

YOURS

NAN

over 1 year ago

0 Nasser Mohammadi over 1 year ago

TI__Guru* 93370 points

Hi Nan,

This is used to meet SMPTe required return loss across frequency band.

Regards,Nasser

0 Nan Zhang over 1 year ago in reply to Nasser Mohammadi

TI__Intellectual 1890 points

Hi Nasser,

Thanks for reply. According to the'' the key SMPTe required return loss across frequency band.'', I find a good paper https://www.thebroadcastbridge.com/content/entry/5841/what-you-need-to-know-about-return-loss and its author comes from TI. Any updates, i will share with you.

YOURS

NAN

0 Nasser Mohammadi over 1 year ago in reply to Nan Zhang

TI__Guru* 93370 points

Sounds good.

Regards,Nasser

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LMH0303: what kind of role of the inductor play in SDO output chain