Title :
A 57-dB image band rejection CMOS Gm-C polyphase filter with automatic frequency tuning for Bluetooth
Author :
Shi, Bo ; Shan, Weiyun ; Andreani, Pietro
Author_Institution :
Center for Wireless Commun., Singapore, Singapore
Abstract :
A 7th order polyphase Gm-C IF filter with automatic frequency tuning, implemented in a 0.35μm CMOS process, is presented. The filter has a center frequency of 3MHz and a passband of 1MHz. The image band rejection is higher than 57dB, the stop band attenuation is at least 40dB. The in-band spurious free dynamic range is around 53dB. On-chip automatic frequency tuning provides more than 240% center frequency range (i.e., 1.6MHz-3.9MHz) of the filter. The filter is well suited for employment in the Bluetooth short-range radio.
Keywords :
CMOS analogue integrated circuits; active filters; band-pass filters; circuit tuning; wireless LAN; 0.35 micron; 1.6 to 3.9 MHz; 3 MHz; Bluetooth short-range radio; CMOS; Gm-C polyphase filter; automatic frequency tuning; center frequency; image band rejection; in-band spurious free dynamic range; passband; stop band attenuation; Attenuation; Automatic frequency control; Band pass filters; Inverters; Parasitic capacitance; Passband; Transconductance; Transconductors; Tuning; Voltage;
Conference_Titel :
Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on
Print_ISBN :
0-7803-7448-7
DOI :
10.1109/ISCAS.2002.1010667
