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A merged CMOS LNA and mixer for a WCDMA receiver

Publiceringsår: 2003
Språk: Engelska
Sidor: 1045-1050
Publikation/Tidskrift/Serie: IEEE Journal of Solid-State Circuits
Volym: 38
Nummer: 6
Dokumenttyp: Artikel i tidskrift
Förlag: IEEE--Institute of Electrical and Electronics Engineers Inc.


A low-noise amplifier (LNA) and mixer circuit in 0.35-mum CMOS operates at 2.1 GHz. Merging the LNA and mixer lowers the number of transistors in the signal path and thereby also the nonlinearity and power consumption. The circuit meets the specifications for a direct conversion wide-band code-division multiple access (WCDMA) receiver. Its noise figure is 3.4 dB (5 kHz to 5 MHz), the total conversion gain is 23 dB, the third-order input-referred intercept point is -1.5 dBm, and the local oscillator leakage to the antenna is less than -71 dBm. The fully differential circuit takes 8 mA from a 2.7-V supply.


  • Electrical Engineering, Electronic Engineering, Information Engineering
  • receiver
  • mixer
  • low-noise amplifier (LNA)
  • front-end
  • CMOS
  • direct conversion
  • zero IF
  • wide-band code-division multiple access (WCDMA)


  • ISSN: 0018-9200

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