Title :
A buffer based CMOS baseband chain for Bluetooth receiver
Author :
Elwan, Hassan ; Younus, Md Iqbal ; Ismail, Mohammed
Author_Institution :
Dept. of Electr. Eng., Ohio State Univ., Columbus, OH, USA
Abstract :
A CMOS low power baseband chain for an integrated Bluetooth receiver is presented. The chain is designed using a new fully differential buffer (FDB) circuit that can effectively implement filters with gain/filtering interleaved operations. The baseband chain utilizes five FDB circuits to implement a 6th order low noise high linearity pre-filter, a 6th order MOS-C tunable filter and a variable gain amplifier (VGA). The distribution of gain and filtering between the various blocks simplifies the design of the VGA stages and allows a good compromise between the input referred noise and the overall linearity. The chain achieves an input referred noise less than 45nV/√(Hz) and an out of band IIP3 of more than 12dBm.
Keywords :
CMOS analogue integrated circuits; active filters; buffer circuits; circuit tuning; integrated circuit design; integrated circuit noise; low-pass filters; low-power electronics; radio receivers; radiofrequency amplifiers; radiofrequency filters; CMOS low power baseband chain; VGA stage design; fully differential buffer circuit; gain/filtering interleaved operations; input referred noise; integrated Bluetooth receiver; low pass filter section; out of band IIP3; overall linearity; sixth order MOS-C tunable filter; sixth order low noise high linearity pre-filter; variable gain amplifier; Baseband; Bluetooth; CMOS technology; Circuit noise; Filtering; Gain; Integrated circuit noise; Linearity; Low pass filters; Mobile communication;
Conference_Titel :
Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on
Conference_Location :
Phoenix-Scottsdale, AZ
Print_ISBN :
0-7803-7448-7
DOI :
10.1109/ISCAS.2002.1010911
