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CMRR and Noise

Other Parts Discussed in Thread: OPA355

Dear Team,


I have a custom made LNA (shown in the attached image). I would like to ask about a suitable setup and procedure to measure noise and CMRR of this LNA.

As shown in the image the LNA is a single-stage diff amplifier with high output impedance. Therefore, I used a buffer (OPA355) at the output to measure the gain of the closed loop LNA, as shown in the attached setup image.

I am not able to upload images here but I have already sent the images via case CS0136479. Or please send me an email address to send the images?

Best regards