Title :
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
Abstract :
A 15-bit 3rd order ΔΣ modulator is presented. The feed forward topology with 18-level quantizer is adopted. The signal swing of the 1st integrator is effectively suppressed. A current-mirror OTA with 42dB DC gain is used in the 1st 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;
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
DOI :
10.1109/VDAT.2010.5496723
