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High frequency and high Q CMOS GM-C bandpass filter with automatic on-chip tuning

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2 Author(s)
H. Elhallabi ; Dept. of Electr. Eng., Ecole Polytech. de Montreal, Que., Canada ; M. Sawan

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).

Published in:

Microelectronics, 2001. ICM 2001 Proceedings. The 13th International Conference on

Date of Conference:

29-31 Oct. 2001