Title :
70 MHz CMOS gm-C IF filter
Author :
Qureshi, Muhammad S. ; Allen, Phillip E.
Author_Institution :
Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
The implementation of a high dynamic range on-chip 70 MHz gm-C filter for a UMTS (WCDMA) superheterodyne receiver is described. The filter is designed in National Semiconductor´s 0.18 micron standard CMOS process. The Chebyshev approximation is used to implement a 6th order filter in active gm-C. Positive feedback is used to realize a large quality factor (Q). The filter provides blocker attenuation with dynamic range (DR) of 42 dB and with power consumption of 21.78 mW.
Keywords :
3G mobile communication; CMOS analogue integrated circuits; Chebyshev approximation; Q-factor; VHF filters; active filters; band-pass filters; cellular radio; circuit feedback; code division multiple access; integrated circuit design; superheterodyne receivers; 0.18 micron; 21.78 mW; 70 MHz; Chebyshev approximation; IF filter; Q-factor; UMTS; WCDMA; active filters; bandpass function; blocker attenuation; cellular phones; dynamic range; power consumption; quality factor; standard CMOS process; superheterodyne receiver; 3G mobile communication; Active filters; Attenuation; CMOS process; Chebyshev approximation; Dynamic range; Energy consumption; Feedback; Multiaccess communication; Q factor;
Conference_Titel :
Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on
Print_ISBN :
0-7803-8834-8
DOI :
10.1109/ISCAS.2005.1465993
