A 0.18μm CMOS 300MHz Current-Mode LF Seventh-order Linear Phase Filter for Hard Disk Read Channels

Author

Zhu, Xi ; Sun, Yichuang ; Moritz, James

Author_Institution

Sch. of Electron. Commun. & Electr. Eng., Hertfordshire Univ., Herts

fYear

2007

fDate

27-30 May 2007

Firstpage

3307

Lastpage

3310

Abstract

A 300MHz CMOS seventh-order linear phase g_m-C filter based on a current-mode multiple loop feedback (MLF) leap-frog (LF) structure is realized. The filter is implemented using a fully-differential linear operational transconductance amplifier (OTA) based on a source degeneration topology. PSpice simulations using a standard TSMC 0.18μm CMOS process with 2.5V power supply have shown that the cut-off frequency of the filter can be tuned from 260MHz to 320MHz and dynamic range is about 66dB. Group delay ripple is approximately 4.5% over the whole tuning range and maximum power consumption is 210mW.

Keywords

CMOS analogue integrated circuits; UHF filters; current-mode circuits; disc drives; equalisers; hard discs; operational amplifiers; 0.18 micron; 2.5 V; 210 mW; 260 to 320 MHz; CMOS current-mode filter; PSpice simulations; TSMC CMOS process; group delay ripple; hard disk read channels; linear phase filter; multiple loop feedback leap-frog structure; operational transconductance amplifier; seventh-order filter; source degeneration topology; CMOS process; Cutoff frequency; Dynamic range; Feedback loop; Hard disks; Nonlinear filters; Operational amplifiers; Power supplies; Topology; Transconductance;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2007. ISCAS 2007. IEEE International Symposium on

Conference_Location

New Orleans, LA

Print_ISBN

1-4244-0920-9

Electronic_ISBN

1-4244-0921-7

Type

conf

DOI

10.1109/ISCAS.2007.378218

Filename

4253386