A merged CMOS LNA and mixer for a WCDMA receiver

Research output: Contribution to journalArticle


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.


Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Electrical Engineering, Electronic Engineering, Information Engineering


  • RF CMOS, receiver, mixer, low-noise amplifier (LNA), front-end, CMOS, direct conversion, zero IF, wide-band code-division multiple access (WCDMA)
Original languageEnglish
Pages (from-to)1045-1050
JournalIEEE Journal of Solid-State Circuits
Issue number6
Publication statusPublished - 2003
Publication categoryResearch