A 14-bit oversampled delta-sigma modulator for silicon condenser microphones

Author

Cheng-Ta Chiang ; Yu-Chung Huang

Author_Institution

Microsyst. Technol. Center, Ind. Technol. Res. Inst., Hsinchu, Taiwan

fYear

2009

fDate

5-7 May 2009

Firstpage

1055

Lastpage

1058

Abstract

In this paper, a 14-bit oversampled delta-sigma modulator for silicon condenser microphones is newly proposed. The proposed oversampled delta-sigma modulator is attractive due to that the requirements of silicon condenser microphones are successfully matched. Based upon the device parameters of 0.35 μm 2P4M CMOS technology with 3.0 V power supply, all the functions and performance of the proposed delta-sigma modulator for silicon condenser microphones are successfully tested and proven through MATLAB in the behavior simulations and SPICE in the circuit simulations. The area of this fabricated chip is 1327 × 944 μm² and the simulated power consumption is 5.25 mW. The proposed delta-sigma modulator is suitable for silicon condenser microphones applied on mobile phones, laptops, PDAs, and hearing aids, etc.

Keywords

CMOS integrated circuits; SPICE; delta-sigma modulation; integrated circuit testing; microphones; silicon; 2P4M CMOS technology; MATLAB; SPICE simulation; chip fabrication; mobile phone; oversampled delta-sigma modulator; power 5.25 mW; silicon condenser microphone; size 0.35 mum; voltage 3 V; word length 14 bit; CMOS technology; Circuit simulation; Circuit testing; Delta modulation; Energy consumption; MATLAB; Microphones; Power supplies; SPICE; Silicon; ADC; delta-sigma modulator; silicon condenser microphones;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference, 2009. I2MTC '09. IEEE

Conference_Location

Singapore

ISSN

1091-5281

Print_ISBN

978-1-4244-3352-0

Type

conf

DOI

10.1109/IMTC.2009.5168609

Filename

5168609