Title :
A 1.1mW 87dB dynamic range audio ΔΣ modulator in 0.18µm CMOS
Author :
Liu, Liyuan ; Liangdong Chen ; Li, DongMei ; Wang, ZhiHua ; Wei, Shaoj un
Author_Institution :
Inst. of Microelectron., Tsinghua Univ., Beijing, China
Abstract :
A 1.1 mW 87 dB dynamic range 3rd order ΔΣ modulator is implemented in 0.18 μm CMOS technology for the audio applications. By adopting a feed-forward multi-bit topology, the signal swing at the output of the first integrator can be suppressed and only one simple current mirror single-stage OTA with 34 dB DC gain is used in the first integrator. The prototype modulator achieves 87 dB DR and 83.8 dB peak SNDR across the bandwidth from 100 Hz to 24 KHz with 3 KHz input signal.
Keywords :
CMOS integrated circuits; current mirrors; feedforward amplifiers; operational amplifiers; sigma-delta modulation; CMOS technology; audio applications; bandwidth 100 Hz to 24 kHz; current mirror single-stage OTA; dynamic range audio sigma delta modulator; feed-forward multi-bit topology; gain 34 dB; power 1.1 mW; size 0.18 μm; Dynamic range;
Conference_Titel :
Microelectronics & Electronics, 2009. PrimeAsia 2009. Asia Pacific Conference on Postgraduate Research in
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-4668-1
Electronic_ISBN :
978-1-4244-4669-8
DOI :
10.1109/PRIMEASIA.2009.5397457
