Title :
1.25V direct-conversion CMOS transmitter front-end for 900MHz ZigBee applications
Author :
Yang, Moon-Su ; Oh, Seung-Min ; Lee, Sang-Gug
Author_Institution :
Inf. & Commun. Univ., Daejeon, South Korea
Abstract :
This paper presents a very low power direct-conversion up-mixer and driver amplifier. The designed mixer is based on the typical Gilbert-cell, and the driver amplifier uses a folded cascode topology to improve the linearity under the low supply voltage. The fabricated up-mixer shows 5.5dB of conversion gain and 7.5dBm of output IP3, and the driver amplifier shows 17dB of power gain and 12dBm of output IP3. The up-mixer and driver amplifier consume 4.5mA and 2mA from 1.25V supply, respectively.
Keywords :
CMOS integrated circuits; UHF amplifiers; driver circuits; low-power electronics; mixers (circuits); transmitters; 1.25 V; 17 dB; 2 mA; 4.5 mA; 5.5 dB; 900 MHz; CMOS transmitter front-end; Gilbert cell; Zigbee applications; direct conversion up-mixer; driver amplifier; folded cascode topology; low supply voltage; Driver circuits; Frequency conversion; Linearity; Low voltage; RF signals; Radio frequency; Radiofrequency amplifiers; Transceivers; Transmitters; ZigBee;
Conference_Titel :
Circuits and Systems, 2003 IEEE 46th Midwest Symposium on
Print_ISBN :
0-7803-8294-3
DOI :
10.1109/MWSCAS.2003.1562514
