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Current-mode integrator for voltage-controllable low frequency continuous-time filters

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4 Author(s)
Yang, Z. ; Dept. of Electr. & Comput. Eng., Boston Univ., MA, USA ; Hinck, T. ; Cohen, H.I. ; Hubbard, A.E.

A novel differential current-mode integrator (CMI) for voltage-controllable low frequency continuous-time filters is presented. An example fifth-order lowpass filter using the proposed CMI and on-chip capacitors was implemented in an AMI 1.2 μm CMOS process, and it achieved -3 dB cutoff frequencies ranging from 160 Hz to 5.6 kHz, by changing a single control voltage.

Published in:

Electronics Letters  (Volume:39 ,  Issue: 12 )