A CMOS 80mW 400MHz seventh-order MLF FLF linear phase filter with gain boost

Author

Zhu, Xi ; Sun, Yichuang ; Moritz, James

Author_Institution

Sch. of EC&EE, Univ. of Hertfordshire, Hatfield

fYear

2008

fDate

Aug. 31 2008-Sept. 3 2008

Firstpage

300

Lastpage

303

Abstract

A 400MHz CMOS seventh-order linear phase g_m-C filter based on current-mode (CM) follow-the-leader-feedback (FLF) 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 0.18mum CMOS process and with 2.5V power supply have shown that the cut-off frequency of the filter ranges from 290MHz to 430MHz and dynamic range is about 54dB. The group delay ripple is approximately 6% over the whole tuning range and total power consumption is only 78.7mW at 400MHz cut-off frequency.

Keywords

CMOS integrated circuits; circuit feedback; current-mode circuits; differential amplifiers; linear phase filters; network topology; operational amplifiers; CMOS seventh-order linear phase filter; PSpice simulations; current-mode follow-the-leader-feedback structure; frequency 400 MHz; fully-differential linear operational transconductance amplifier; power 80 mW; source degeneration topology; voltage 2.5 V; CMOS process; Cutoff frequency; Delay; Dynamic range; Nonlinear filters; Operational amplifiers; Power supplies; Topology; Transconductance; Tuning;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics, Circuits and Systems, 2008. ICECS 2008. 15th IEEE International Conference on

Conference_Location

St. Julien´s

Print_ISBN

978-1-4244-2181-7

Electronic_ISBN

978-1-4244-2182-4

Type

conf

DOI

10.1109/ICECS.2008.4674850

Filename

4674850