A current mode equalizer for an optical disc front-end

Author

Bae, JumHan ; Choi, GoangSeog

Author_Institution

Digital Media R&D Center, Samsung Electron. Co. Ltd., Yongin, South Korea

Volume

55

Issue

2

fYear

2009

fDate

5/1/2009 12:00:00 AM

Firstpage

564

Lastpage

569

Abstract

A 1.2 V current-mode 7th-order Bessel low pass filter (LPF) with programmable boosting gain for an optical disc front-end is presented. The wide cut-off frequency tuning is achieved by using current-mode buffers, triode region MOS resistors and varactors. The constant gm biasing and the current-mode oscillator ensure that frequency characteristics are robust to process, voltage and temperature variations. It covers a wide frequency tuning range of 1-140 MHz and speeds of CD 4x - BD 8x, for CD/DVD/BD. It has a low power consumption of 19 mW and a small size of 0.167 mm², and is fabricated with 0.13 mum CMOS technology.

Keywords

MOS integrated circuits; current-mode circuits; equalisers; low-pass filters; triodes; tuning; varactors; Bessel low pass filter; CMOS technology; current mode equalizer; current-mode buffers; frequency 1 MHz to 140 MHz; frequency tuning; optical disc front-end; programmable boosting gain; triode region MOS resistors; varactors; voltage 1.2 V; Boosting; CMOS technology; Cutoff frequency; Equalizers; Low pass filters; Optical buffering; Optical filters; Optical tuning; Resistors; Varactors; Front-End, Optical Disc, Equalizer, CMOS; SOC, Current Mode;

fLanguage

English

Journal_Title

Consumer Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0098-3063

Type

jour

DOI

10.1109/TCE.2009.5174423

Filename

5174423