Title :
A power-efficient polyphase sharpened CIC filter for sigma-delta ADCs
Author :
Karnati, N.R. ; Kye-Shin Lee ; Carletta, Joan ; Veillette, R.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Akron, Akron, OH, USA
Abstract :
This paper presents a power-efficient poly-phase sharpened CIC filter for sigma-delta ADCs. In this scheme, by using a cascade of CIC filter and SCIC filter with proper optimization of the two-stage decimation structure, the power consumption can be considerably reduced compared to conventional SCIC filter architectures. Furthermore, poly-phase implementations for both the CIC and SCIC filter sections are used to further reduce the power. The proposed filter is designed with CMOS 1 μm technology, where the lowest power consumption is achieved among similar filter architectures.
Keywords :
CMOS integrated circuits; cascade networks; circuit optimisation; comb filters; sigma-delta modulation; CMOS technology; SCIC filter; cascaded integrator-comb filter; optimization; power consumption; power-efficient polyphase sharpened CIC filter; sigma-delta ADC; size 1 mum; two-stage decimation structure; CMOS integrated circuits; Measurement; Signal to noise ratio;
Conference_Titel :
Circuits and Systems (MWSCAS), 2011 IEEE 54th International Midwest Symposium on
Conference_Location :
Seoul
Print_ISBN :
978-1-61284-856-3
Electronic_ISBN :
1548-3746
DOI :
10.1109/MWSCAS.2011.6026689
