The design of a multi-bit sigma-delta ADC modulator

Author

Yang Shaojun ; Tong Ziquan ; Jiang Yueming ; Dou Naiying

Author_Institution

Higher Educ. Key Lab. for Meas. & Control Technol. & Instrum. of Heilongjiang Province, Harbin Univ. of Sci. & Technol., Harbin, China

Volume

01

fYear

2013

fDate

16-18 Aug. 2013

Firstpage

280

Lastpage

283

Abstract

Sigma-delta modulation is a superior technique to realize A/D converter with high resolution. This paper proposes a new method to design a low-cost, high-performance and third-order sigma-delta modulator whose structure is three-bit quantization CIFF (cascade of integrators, feed forward form). It combines the high-speed and data processing ability of FPGA to achieve high accuracy of sigma-delta ADC. The diagram of each part in circuit is given, and system modeling and simulations are carried out in this paper. The results show that, the modulator with multi-bit quantization has a higher SNR.

Keywords

feedforward; field programmable gate arrays; integrating circuits; quantisation (signal); sigma-delta modulation; CIFF; FPGA; analog-digital converters; cascade of integrators feedforward form; multibit quantization; multibit sigma-delta ADC modulator; third-order sigma-delta modulator; word length 3 bit; Field programmable gate arrays; Modulation; Tiles; Sigma-delta ADC; modulator; multi-bit quantization; noise shaping; over sampling;

fLanguage

English

Publisher

ieee

Conference_Titel

Measurement, Information and Control (ICMIC), 2013 International Conference on

Conference_Location

Harbin

Print_ISBN

978-1-4799-1390-9

Type

conf

DOI

10.1109/MIC.2013.6757965

Filename

6757965