Title :
Design of a Chebyshev low pass filter with automatic frequency calibration
Author :
Fan, Chaojie ; Lu, Yuxiao ; Mao, Cui
Author_Institution :
Sch. of Microelectron., Shanghai Jiao Tong Univ., Shanghai, China
Abstract :
A 6th order Chebyshev type I low pass filter applied in zero-IF wireless receivers, implemented in 0.18 ¿m CMOS technology is introduced, this filter is realized with leapfrog structure, has an attenuation of 30 dB at 5.25 MHz, less than 1 dB in-band ripple, 25 nV/sqrt(Hz) input referred noise at 5 kHz, and draws 2.6 mA from 1.8 V supply. By employing frequency calibration circuit, the cut-off frequency of the filter can be tuned to within 4% from the desired value, which is 3.756 MHz.
Keywords :
CMOS integrated circuits; Chebyshev filters; low-pass filters; receivers; CMOS technology; Chebyshev low pass filter; automatic frequency calibration; current 2.6 mA; frequency 3.756 MHz; frequency 5 kHz; frequency 5.25 MHz; frequency calibration circuit; size 0.18 mum; voltage 1.8 V; zero-IF wireless receivers; Active filters; Automatic frequency control; Band pass filters; CMOS technology; Calibration; Chebyshev approximation; Circuits; Low pass filters; Q factor; Resistors;
Conference_Titel :
Microelectronics & Electronics, 2009. PrimeAsia 2009. Asia Pacific Conference on Postgraduate Research in
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-4668-1
Electronic_ISBN :
978-1-4244-4669-8
DOI :
10.1109/PRIMEASIA.2009.5397431
