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Low-voltage fully differential switched-current filters

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2 Author(s)
R. H. Zele ; Dept. of Electr. & Comput. Eng., Carnegie Mellon Univ., Pittsburgh, PA, USA ; D. J. Allstot

An accurate high-frequency switched-current integrator based on low-voltage fully-differential folded-cascode current copiers is presented. A five-pole lowpass ladder filter has been integrated using a 1.2 μm n-well CMOS process without floating precision linear capacitors. Experimental results show an accurate filter response for sampling frequencies up to 5 MHz. Using a nominal 3.3 V power supply, the measured dynamic range is 66 dB and the power dissipation is 10 mW/pole

Published in:

IEEE Journal of Solid-State Circuits  (Volume:29 ,  Issue: 3 )