Title :
High frequency and high Q CMOS GM-C bandpass filter with automatic on-chip tuning
Author :
Elhallabi, H. ; Sawan, M.
Author_Institution :
Dept. of Electr. Eng., Ecole Polytech. de Montreal, Que., Canada
Abstract :
A maximally flat magnitude 70 MHz fourth-order bandpass filter with an on-chip automatic tuning system is presented. The input equivalent noise is 19 μV/sqr(Hz) which shows that the nonlinearity at the input of the filter is very small. The IIP3 (the input level of the third-order intercept point) of the filter is -9.25dBm. The complete system operates with a supply voltage of 2.2 V. All this has been achieved due to the use of a low distortion transconductor, and the realization of an advanced on-chip automatic tuning system for both frequency and bandwidth control. The whole circuit has been implemented in 0.35 μm CMOS technology available through the Canadian Microelectronics Corporation (CMC).
Keywords :
CMOS analogue integrated circuits; Q-factor; VHF filters; automatic frequency control; band-pass filters; circuit tuning; continuous time filters; 0.35 micron; 2.2 V; 70 MHz; CMOS GM-C bandpass filter; CMOS technology; HF filter; IIP3; automatic on-chip tuning; bandwidth control; fourth-order bandpass filter; frequency control; high Q bandpass filter; high frequency filter; low distortion transconductor; maximally flat magnitude; third-order intercept point; Automatic voltage control; Band pass filters; Bandwidth; CMOS technology; Circuit optimization; Control systems; Frequency; System-on-a-chip; Transconductors; Tuning;
Conference_Titel :
Microelectronics, 2001. ICM 2001 Proceedings. The 13th International Conference on
Print_ISBN :
0-7803-7522-X
DOI :
10.1109/ICM.2001.997514
