An signed fifth-order feed-forward sigma-delta DAC with 100-KHz signal bandwidth

Author

Yongsheng Wang ; Lijun Dong ; Xiaomei Guo ; Lixin Zhang ; Xiaoxiao Ren ; Fengchang Lai

Author_Institution

Micro-Electron. Dept., Harbin Inst. of Technol., Harbin, China

fYear

2014

fDate

28-31 Oct. 2014

Firstpage

1

Lastpage

3

Abstract

A sigma-delta digital to analog converter (DAC) which achieves 98.26-dB signal to noise rate in the 100-KHz band is proposed in this paper. A fifth-order feed-forward modulator is adopted to converter the digital signal to 1-bit analog signal. The signal transfer function (STF) of the modulator is unity. The folded structure is applied in the interpolation filter which is realized by three kinds of digital filter. Besides, a sixth-order Bessel low-pass filter realized in the way of switch-capacitor (SC) is used to suppress the noise in signal band.

Keywords

digital filters; digital-analogue conversion; low-pass filters; modulators; sigma-delta modulation; bandwidth 100 kHz; digital filter; digital-analog converter; feed forward sigma-delta DAC; fifth order feed forward modulator; folded structure; interpolation filter; signal band noise suppression; signed fifth order sigma-delta DAC; sixth order Bessel low pass filter; switch capacitor;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State and Integrated Circuit Technology (ICSICT), 2014 12th IEEE International Conference on

Conference_Location

Guilin

Print_ISBN

978-1-4799-3296-2

Type

conf

DOI

10.1109/ICSICT.2014.7021301

Filename

7021301