Title :
A 1.8V fully differential CMOS low noise amplifier with a special care for mixer input stage
Author :
Lee, Jeonghoon ; Kim, Youngsik
Author_Institution :
Dept. of Inf. Technol., Handong Global Univ., Gyung-Buk
Abstract :
A fully differential low noise amplifier with a special care for mixer input stage is presented. It considers mixer input stage to comply with DC bias condition of low noise amplifier output without bias tee using a common-mode feedback circuitry (CMFB). The proposed fully differential low noise amplifier is focused on the 915MHz an unlicensed frequency ISM band communication. This low noise amplifier is fabricated on CMOS 0.18-mum technology. Measured results show 19.2dB power gain, 2.7dB noise figure (NF), -8.6dBm output P1dB and 2.2dBm OIP3. Furthermore, power gain varies from 17.3dB to 19.5dB and also output PldB changes from -19.5dBm to -6dBm according to the reference voltage which is engaged to CMFB. This fully differential low noise amplifier consumes 1.7mA current at 1.8V supply voltage
Keywords :
CMOS integrated circuits; differential amplifiers; low noise amplifiers; mixers (circuits); 0.18 micron; 1.7 mA; 1.8 V; 17.3 to 19.5 dB; 19.2 dB; 2.7 dB; 915 MHz; CMOS technology; DC bias condition; common-mode feedback circuitry; fully differential low noise amplifier; mixer input stage; unlicensed frequency ISM band communication; CMOS technology; Circuit noise; Differential amplifiers; Feedback circuits; Frequency; Low-noise amplifiers; Noise measurement; Output feedback; Power measurement; Voltage;
Conference_Titel :
Silicon Monolithic Integrated Circuits in RF Systems, 2006. Digest of Papers. 2006 Topical Meeting on
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-9472-0
DOI :
10.1109/SMIC.2005.1587937
