Title :
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
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;
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
DOI :
10.1109/ICSICT.2014.7021301
