Friday, April 01, 2005

Transformer-Coupled Front-End for Wideband A/D Converters

ADCs are being used at ever higher frequencies, making receiver front-end design increasingly important. Many applications are moving to super-Nyquist sampling in order to eliminate a mix-down stage, but amplifier noise will degrade the signal-to-noise ratio at these frequencies. Transformers can be used to replace the amplifier, minimizing noise and providing good high-frequency coupling.

What did you think about this article?

3 Comments:

At 11:08 AM, Blogger Mike said...

Has anyone done any modeling with the transformer-coupled front-end/

 
At 12:35 PM, Anonymous Anonymous said...

Mike,

Yes, but only for a first or secondary impedance model. Developing a model for a transformer is difficult and somewhat iterative. Most manufactures have s-parameters available on their website or through their customer support.

Regards,

Rob Reeder

 
At 1:30 AM, Anonymous Zeev said...

Very interesting article

 

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