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

fYear

2007

Firstpage

340

Lastpage

343

Abstract

A 400 MHz CMOS fifth-order linear phase g_m-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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ECCTD.2007.4529602

Filename

4529602