Title :
A CMOS polyphase low-IF filter with on-chip frequency control
Author :
Lu, Wenqing ; Cheng, Shiwei ; Liu, Yang ; Cao, Shengguo ; Zhang, Ke ; Zhou, Xiaofang
Author_Institution :
Fudan Univ., Shanghai
Abstract :
A CMOS polyphase low-IF filter with on-chip frequency control for a 2.4 GHz wireless LAN is presented. Designed in a 1.8 V, 0.18 mum standard CMOS process, this Chebyshev polyphase filter has a 7th order 0.5 dB passband ripple. An on-chip auto frequency control module is designed for the variation of process in order to get the required sensitivity of the filter. This filter consumes 1.74 mW including the on-chip control module and the total chip area is 0.276 mm2.
Keywords :
CMOS integrated circuits; Chebyshev filters; automatic frequency control; radiofrequency filters; wireless LAN; CMOS polyphase low-IF filter; Chebyshev polyphase filter; frequency 2.4 GHz; onchip auto frequency control module; passband ripple; power 1.74 mW; voltage 1.8 V; wireless LAN; Band pass filters; Capacitance; Capacitors; Frequency control; Output feedback; Passband; System-on-a-chip; Transconductors; Voltage; Wireless LAN;
Conference_Titel :
ASIC, 2007. ASICON '07. 7th International Conference on
Conference_Location :
Guilin
Print_ISBN :
978-1-4244-1132-0
Electronic_ISBN :
978-1-4244-1132-0
DOI :
10.1109/ICASIC.2007.4415722
