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Design of a 15-MHz CMOS continuous-time filter with on-chip tuning

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1 Author(s)
Khoury, J.M. ; AT&T Bell Labs., Murray Hill, NJ, USA

A fifth-order CMOS continuous-time Bessel filter with a tunable 6- to 15-MHz cutoff frequency is described. This fully balanced transconductance-capacitor (Gm-C) leapfrog filter achieves a dynamic range of 55 dB while dissipating 96 mW in a 5-V 0.9-μm CMOS process. The author reviews the disk drive application and filtering requirements, and explains why the G m-C continuous-time filtering approach was used. The on-chip master-slave tuning system uses a voltage-controlled oscillator (VCO). Experimental results are presented

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:26 ,  Issue: 12 )