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.
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posted by Analog Dialogue @ 10:24 AM
2 comments
2 Comments:
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
Very interesting article
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