A 3 V linear input range tunable CMOS transconductor and its application to a 3.3 V 1.1 MHz Chebyshev low-pass Gm-C filter for ADSL

Author

Lee, Jim-Yih ; Tu, Chien-Cheng ; Chen, Wei-Hong

Author_Institution

Electron. Res. & Service Organ., Ind. Technol. Res. Inst., Hsinchu, Taiwan

fYear

2000

fDate

2000

Firstpage

387

Lastpage

390

Abstract

A fully differential CMOS transconductor with 3 V linear input range is proposed. The Gm value of the transconductor is tunable through a current division scheme. A current mode arithmetic method is used to adaptively bias the transconductor tuning stage. A 3.3 V 1.1 MHz Chebyshev low-pass Gm-C filter using this highly linear transconductor achieves a IM3 distortion at 300 kHz of -62 dBc for a 2 Vppd input signal. The filter was fabricated with a double poly triple metal 0.35 μm CMOS process and consumes 66 mW

Keywords

CMOS analogue integrated circuits; Chebyshev filters; active filters; active networks; circuit feedback; circuit tuning; digital subscriber lines; low-pass filters; 0.35 micron; 1.1 MHz; 3.3 V; 66 mW; ADSL application; Chebyshev low-pass Gm-C filter; adaptive bias scheme; asymmetric DSL; current division scheme; current mode arithmetic method; double poly triple metal CMOS process; fully differential CMOS transconductor; linear input range; transconductor tuning stage biasing; tunable CMOS transconductor; CMOS process; Chebyshev approximation; Circuit optimization; Feedback loop; Linearity; Low pass filters; Nonlinear filters; Resistors; Transconductance; Transconductors;

fLanguage

English

Publisher

ieee

Conference_Titel

Custom Integrated Circuits Conference, 2000. CICC. Proceedings of the IEEE 2000

Conference_Location

Orlando, FL

Print_ISBN

0-7803-5809-0

Type

conf

DOI

10.1109/CICC.2000.852692

Filename

852692