Dissertation > Industrial Technology > Radio electronics, telecommunications technology > Basic electronic circuits > Modulation technique and the modulator,demodulator and the demodulator > Modulation technique and the modulator

90dB Sigma-Delta modulator design

Author SuXiuMin
Tutor LiNing;XieJianZuo
School Fudan University
Course IC Engineering
Keywords Analog-digital conversion Sigma-Delta modulation Switch-capacitor
Type Master's thesis
Year 2011
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Analog to Digital converter is widely used in all aspects with the development of digital technology and communications. In the field of audio signal processing, analog to digital conversion circuit also played an important role.In this paper, we design a 90dB Sigma-Delta modulator, for audio ADC. It is use SMIC 0.13μm process. From analysis of the spec, determine the structure of the circuit, to completion of the tape out, packaging and testing, we have successfully completed the design and development of the Sigma-Delta modulator.The circuit has many blocks, such as integrator circuit, comparator circuit, reference voltage circuit, clock generator circuit, sample and hold circuit. For each circuit, we have theoretical calculations and analysis, simulation and completed the layout. Finally, we test the chip and get the conclusion.

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