The design and implementation of Sigma-Delta modulator for audio band applications

• Main Authors: Wu, Jin-Yi, 吳俊誼
• Other Authors: 闕河鳴
• Format: Others
• Language: en_US
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/41872254652328406825

碩士 === 國立交通大學 === 電信工程系所 === 97 === Analog-to-digital converters (ADCs) are employed in many electronic products, and it’s important to make a choice between accuracy and speed for different applications. In several kinds of ADCs (Ex: Flash ADC、Pipeline ADC and Sigma-Delta ADC), Sigma-Delta ADC is suitable for low speed and high resolution electronic products. The principles when designing Sigma-Delta ADC are high resolution 、low power consumption and low cost. The ADCs which are application for portable devices such as mp3 players and hearing aids would be designed for low power consumption and small chip area. Because of fast growing of portable devices, circuit operation with low-voltage and low-power is desirable. In the premise of low power consumption, we designed a Sigma-Delta ADC which is high resolution 、high stability and low cost. The ADC is employed in the hearing aids for moderately hearing-impaired. The chip area is 0.058mm2 and power consumption is 53uW.