| Author Name | Affiliation | | Jia-Jun Zhou | 1. Micro Electromechanical System Center, Harbin Institute of Technology, Harbin 150001, China
2. Key Laboratory of Micro-Systems and Micro-Structures Manufacturing, Ministry of Education, Harbin 150001, China | | Hong-Lin Xu | 1. Micro Electromechanical System Center, Harbin Institute of Technology, Harbin 150001, China
2. Key Laboratory of Micro-Systems and Micro-Structures Manufacturing, Ministry of Education, Harbin 150001, China | | Rui Zhang | 1. Micro Electromechanical System Center, Harbin Institute of Technology, Harbin 150001, China
2. Key Laboratory of Micro-Systems and Micro-Structures Manufacturing, Ministry of Education, Harbin 150001, China | | Xiao-Wei Liu | 1. Micro Electromechanical System Center, Harbin Institute of Technology, Harbin 150001, China
2. Key Laboratory of Micro-Systems and Micro-Structures Manufacturing, Ministry of Education, Harbin 150001, China |
|
| Abstract: |
| In this paper, in order to reduce power consumption and chip area, as well as to improve the performance of the bandpass sigma-delta modulator, a novel full differential feedforward fourth-order bandpass sigma-delta modulator was proposed. It used a resonator based on Salo architecture, which employed double-sampling and double-delay technique. The results show that the proposed modulator can achieve lower power consumption and a lower capacitive load than the conventional bandpass modulators on the platform of Simulink. The circuit is implemented with TSMC0.18 μm CMOS process and operates at a sampling frequency of 20 MHz, 80 MHz effective sampling frequency. Furthermore, it consumes 21.2 mW from a 1.8 V supply. The simulated peak signal-to-noise ratio (SNR) is 85.9 dB and the dynamic range (DR) is 91 dB with 200 kHz bandwidth. |
| Key words: bandpass Sigma-Delta modulator double-sampling |
| DOI：10.11916/j.issn.1005-9113.2013.05.022 |
| Clc Number:TN47 |
| Fund: |
