Title :
A CMOS fifth-order 400MHz current-mode LF linear phase filter for hard disk read channels
Author :
Zhu, Xi ; Sun, Yichuang ; Moritz, James
Author_Institution :
Sch. of EC&EE, Univ. of Hertfordshire, Hatfield
Abstract :
A 400 MHz CMOS fifth-order linear phase gm-c filter based on current-mode (CM) leapfrog (LF) structure is realized. The filter is implemented using a fully-differential linear operational transconductance amplifier (OTA) based on source degeneration topology. PSpice simulations in a standard TSMC 0.18 mum CMOS process and with 2.5 V power supply have shown that the cut-off frequency of the filter ranges from 330 MHz to 450 MHz and dynamic range is about 64 dB. The group delay is approximately 4% over the whole tuning range and total power consumption is only 190 mW at 400 MHz cut-off frequency.
Keywords :
CMOS integrated circuits; hard discs; CMOS process; PSpice simulation; current-mode leapfrog structure; cut-off frequency; frequency 330 MHz to 450 MHz; frequency 400 MHz; hard disk read channel; linear operational transconductance amplifier; linear phase filter; power 190 mW; size 0.18 mum; source degeneration topology; voltage 2.5 V; CMOS process; Cutoff frequency; Delay; Dynamic range; Hard disks; Nonlinear filters; Operational amplifiers; Power supplies; Topology; Transconductance;
Conference_Titel :
Circuit Theory and Design, 2007. ECCTD 2007. 18th European Conference on
Conference_Location :
Seville
Print_ISBN :
978-1-4244-1341-6
Electronic_ISBN :
978-1-4244-1342-3
DOI :
10.1109/ECCTD.2007.4529602
