Title :
High frequency CMOS Gm-C bandpass filter with automatic on-chip tuning
Author :
Elhallabi, H. ; Fouzar, Y. ; Sawan, M.
Author_Institution :
Dept. of Electr. & Comput. Eng., PolySTIM Neurotechnology Lab., Montreal, Que., Canada
fDate :
6/23/1905 12:00:00 AM
Abstract :
A fourth-order CMOS transconductance-C (Gm-C) bandpass filter with on-chip automatic frequency tuning for wireless receiver filtering applications is proposed. A linearized transconductance (Gm) cell is designed and optimized for phase error cancellation. The center frequency of the filter is locked to an external reference frequency using an Adaptive Gain Phase-Locked Loop (AGPLL). The purpose of the AGPLL technique is to provide a short locking time which is under 50 clock cycles, it decreases the filter time response. The power supply of the proposed design is 2.2 volts and the whole circuit has been implemented in 0.35 um CMOS technology available through the Canadian Microelectronics Corporation (CMC)
Keywords :
CMOS analogue integrated circuits; band-pass filters; circuit tuning; continuous time filters; phase locked loops; radio receivers; 0.35 micron; 2.2 V; adaptive gain phase-locked loop; automatic on-chip tuning; fourth-order CMOS Gm-C bandpass filter; frequency locking; high-frequency circuit; linearized transconductance cell; phase error cancellation; wireless receiver; Adaptive filters; Automatic frequency control; Band pass filters; CMOS technology; Clocks; Design optimization; Filtering; Phase locked loops; Transconductance; Tuning;
Conference_Titel :
Electronics, Circuits and Systems, 2001. ICECS 2001. The 8th IEEE International Conference on
Print_ISBN :
0-7803-7057-0
DOI :
10.1109/ICECS.2001.957601
