Title :
A merged CMOS LNA and mixer for a WCDMA receiver
Author :
Sjöland, Henrik ; Karimi-Sanjaani, Ali ; Abidi, Asad A.
Author_Institution :
Dept. of Electroscience, Lund Univ., Sweden
fDate :
6/1/2003 12:00:00 AM
Abstract :
A low-noise amplifier (LNA) and mixer circuit in 0.35-μm 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 (5kHz to 5MHz), 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.
Keywords :
CMOS analogue integrated circuits; UHF amplifiers; UHF integrated circuits; UHF mixers; code division multiple access; leakage currents; 0.35 micron; 2.1 GHz; 2.7 V; 23 dB; 3.4 dB; 5 kHz to 5 MHz; 8 mA; WCDMA receiver; direct conversion wide-band code-division multiple access receiver; fully differential circuit; local oscillator leakage; low-noise amplifier; merged CMOS LNA; mixer circuit; nonlinearity; power consumption; signal path; third-order input-referred intercept point; total conversion gain; Baseband; Circuits; Local oscillators; Low pass filters; Low-noise amplifiers; Merging; Multiaccess communication; Noise figure; Radio frequency; Voltage-controlled oscillators;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2003.811952
