THS7530: About Noise Figure

Toshiyuki

Mastermind 7075 points

Part Number: THS7530

Hi,

Would you tell me why the noise figure specification is difference in a gain setting for Figure 3. of the datasheet?

Best Regards,

Toshiyuki

over 6 years ago

0 kai klaas69 over 6 years ago

Guru 140200 points

Hi Toshiyuki,

many of the todays VGAs use a topology which provides a constant output noise. But this means, that the input reffered noise depends on the set gain. The higher the set gain, the lower the input referred noise. This is what figure 3 of datasheet shows.

Kai

0 Toshiyuki over 6 years ago in reply to kai klaas69

Mastermind 7075 points

Hi Kai-san,

Thank you for the reply. I would like to share our customer's schematic and evaluation results by off line communication, so please approve my friendship request

Best Regards,

Toshiyuki

0 Rohit Bhat over 6 years ago in reply to Toshiyuki

TI__Genius 15975 points

Hi Toshiyuki-san,

Please send the customer schematic and evaluation results to rohitdbhat@ti.com

Best Regards,
Rohit

Amplifiers

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THS7530: About Noise Figure