A 1-V, 82-dB, 2.5-MS/s, single loop, single bit delta-sigma modulator in 0.13-mu m CMOS technology

作者：Tao Yonghong^*; Yao Libin; Lian Yong

来源：Analog Integrated Circuits and Signal Processing, 2012, 71(2): 171-178.

DOI：10.1007/s10470-011-9725-3

• Delta-sigma modulator
• Low voltage
• Input feed-forward

It is challenging to design high speed Delta-Sigma modulator using sub-micron process with low supply voltage. Compared with multi-stage or multi-bit design, the single loop, single bit Delta-Sigma modulator has relaxed requirement for the building blocks under low-voltage operation, which make it possible to get high conversion rate by increasing sampling frequency. In this study, a low voltage, high speed 4th-order Delta-Sigma modulator using input feed-forward is presented. Implemented with 0.13-mu m CMOS technology and 1.0-V supply voltage, the discrete-time Delta-Sigma modulator achieves 2.5-MS/s conversion rate and 82-dB dynamic range, with the sampling frequency of 160-MHz and OSR of 64.

• 出版日期2012-5