Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/13873
Title: Micromechanical resonator based bandpass sigma-delta modulator
Authors: WANG XIAOFENG
Keywords: Sigma-Delta modulation, ADC, bandpass,MEMS, resonator, IF digitization
Issue Date: 14-Apr-2004
Source: WANG XIAOFENG (2004-04-14). Micromechanical resonator based bandpass sigma-delta modulator. ScholarBank@NUS Repository.
Abstract: The design of a newly proposed 2nd-order bandpass I#I? modulator based on micromechanical resonator is presented. The micromechanical resonator is used to replace its electronic counterpart for its high Q value. The design is based on pulse-invariant transform and multi-feedback technique. The proposed modulator is implemented in a 0.6-I?m CMOS process with an external clamped-clamped beam micromechanical resonator.Due to the lack of qualified micromechanical resonators, the testing with the only micromechanical resonator did not give expected results. The test was subsequently carried out with crystal resonators and successfully demonstrated a 2nd-order bandpass I#I? modulator, which proves that the proposed idea is feasible. The test results have shown that when sampled at 4MHz the peak SNR in 200-kHz signal bandwidth is measured to be 22dB while the Matlab simulated value is 25dB. The modulator is also functional at the sampling frequency of 32MHz.
URI: http://scholarbank.nus.edu.sg/handle/10635/13873
Appears in Collections:Master's Theses (Open)

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
wangxfthesis.pdf1.53 MBAdobe PDF

OPEN

NoneView/Download

Page view(s)

187
checked on Dec 2, 2017

Download(s)

279
checked on Dec 2, 2017

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.