A 1V 663µW 15-bit audio ΔΣ modulator in 0.18µm CMOS

Author

Liu, Liyuan ; Li, DongMei ; Chen, Liangdong ; Zhang, Chun ; Wei, Shaojun ; Wang, ZhiHua

Author_Institution

Inst. of Microelectron., Tsinghua Univ., Beijing, China

fYear

2010

fDate

26-29 April 2010

Firstpage

194

Lastpage

197

Abstract

A 15-bit 3^rd order ΔΣ modulator is presented. The feed forward topology with 18-level quantizer is adopted. The signal swing of the 1^st integrator is effectively suppressed. A current-mirror OTA with 42dB DC gain is used in the 1^st integrator. Chop stabilization is employed to remove the flicker noise. The prototype is fabricated in 0.18μm CMOS. The active die area is 0.85×0.85mm². The power consumption is 663μW under all 1V power supply.

Keywords

CMOS digital integrated circuits; current mirrors; delta-sigma modulation; feedforward amplifiers; flicker noise; integrated circuit noise; integrating circuits; network topology; operational amplifiers; CMOS; active die area; audio ΔΣ modulator; chop stabilization; current-mirror OTA; feed forward topology; flicker noise; gain 42 dB; integrator; power 663 mW; power consumption; quantizer; size 0.18 mum; voltage 1 V; word length 15 bit; 1f noise; Bandwidth; Circuit topology; Energy consumption; Equations; Feedforward systems; Feeds; Low voltage; Performance gain; Power supplies;

fLanguage

English

Publisher

ieee

Conference_Titel

VLSI Design Automation and Test (VLSI-DAT), 2010 International Symposium on

Conference_Location

Hsin Chu

Print_ISBN

978-1-4244-5269-9

Electronic_ISBN

978-1-4244-5271-2

Type

conf

DOI

10.1109/VDAT.2010.5496723

Filename

5496723