Title :
A second-order low-power ΔΣ modulator for pressure sensor applications
Author :
Nieminen, Tero ; Halonen, Kari
Author_Institution :
Sch. of Sci. & Technol., Dept. of Micro- & Nanosci., Aalto Univ., Aalto, Finland
Abstract :
In this paper, an 1-bit second-order low-power ΔΣ modulator for pressure sensor applications is presented. The modulator utilizes correlated double-sampling (CDS) in order to reduce the flicker (1/f) noise. Due to the 1-bit output, the feedback DAC is inherently linear. The modulator is designed with 0.35-μm CMOS process. Measured signal-to-noise and distortion ratio (SNDR) is 86dB (14bits), while the current consumption is 14μA.
Keywords :
1/f noise; CMOS integrated circuits; digital-analogue conversion; pressure sensors; sigma-delta modulation; 1/f noise; CMOS; correlated double-sampling; current 14 muA; feedback DAC; pressure sensor; second-order low-power ΔΣ modulator; signal-to-noise and distortion ratio; size 0.35 mum; word length 1 bit; word length 14 bit; Capacitors; Clocks; Frequency measurement; Frequency modulation; Generators; Signal to noise ratio;
Conference_Titel :
NORCHIP, 2010
Conference_Location :
Tampere
Print_ISBN :
978-1-4244-8972-5
Electronic_ISBN :
978-1-4244-8971-8
DOI :
10.1109/NORCHIP.2010.5669456
