Title :
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
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;
Conference_Titel :
Instrumentation and Measurement Technology Conference (I2MTC), 2011 IEEE
Conference_Location :
Binjiang
Print_ISBN :
978-1-4244-7933-7
DOI :
10.1109/IMTC.2011.5944003
