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Design considerations for integrated CMOS receivers

Posted: 12 Oct 2007     Print Version  Bookmark and Share

Keywords:CMOS receiver  RX performance  RX sensitivity  dynamic range 

This article discusses factors to be considered in the design of integrated CMOS receivers. The major RX performance parameters are RX sensitivity, RX selectivity, dynamic range, IIP2, IIP3, and phase noise. The RX sensitivity is mostly set by the front end low noise amplifier (LNA) and the demodulator (DEMOD). The RX selectivity is determined by the on-chip low pass filter (LPF)'s rejection performance. Dynamic range, IIP2, and IIP3 are the measures of how robust a RX is with the presence of in-band and out-of-band interferences. Phase noise has a major impact on the signal modulation and demodulation as phase-shift key modulation is commonly used.

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