A low-cost first-order sigma-delta converter design and analysis

Author

Ya, Ma Li ; Khan, Sheroz ; Nordin, Anis Nurashikin ; Alam, Ahm Zahirul ; Omar, Jamaludin ; Al-Khateeb, Khalid A S ; Islam, Muhammad Rafiqul ; Naji, Ahmed Wathik

Author_Institution

Dept. of Electr. & Comput. Eng., Int. Islamic Univ. Malaysia, Kuala Lumpur, Malaysia

fYear

2011

fDate

10-12 May 2011

Firstpage

1

Lastpage

5

Abstract

This paper presents the design and analysis of an interface circuit for MEMS or biomedical sensor applications. This circuitry performs the function of an analog-to-digital converter. A first-order 1-bit sigma-delta (Σ-Δ) analog-to-digital converter is designed and simulated using Silterra 0.13μm CMOS process technology with power supply of 1.2V through Cadence. Then the circuit simulation results are transferred to MATLAB, in order to get the frequency domain power spectral density (PSD). The simulation results on noise and error analysis are compared with those from a traditional analog-to-digital converter to prove that sigma-delta is performing better in the case of weak signals acquisition.

Keywords

CMOS integrated circuits; biosensors; error analysis; micromechanical devices; sigma-delta modulation; MATLAB simulation; MEMS; Silterra CMOS process technology; biomedical sensor application; error analysis; frequency domain PSD; frequency domain power spectral density; interface circuit; low-cost first-order Σ-Δ analog-to-digital converter; low-cost first-order sigma-delta analog-to-digital converter; noise analysis; size 0.13 mum; voltage 1.2 V; weak signal acquisition; word length 1 bit; Frequency conversion; Frequency modulation; Noise; Operational amplifiers; Sigma delta modulation; Signal resolution;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference (I2MTC), 2011 IEEE

Conference_Location

Binjiang

ISSN

1091-5281

Print_ISBN

978-1-4244-7933-7

Type

conf

DOI

10.1109/IMTC.2011.5944003

Filename

5944003