An Ultra Low-power Front-end Circuit for Temperature Sensors

• Main Authors: Tsung-Yu wu, 吳宗諭
• Other Authors: Chauchin Su
• Format: Others
• Language: en_US
• Online Access: http://ndltd.ncl.edu.tw/handle/48822761509424264487

碩士 === 國立交通大學 === 電機與控制工程系所 === 95 === In this thesis, a low-power low-voltage front-end circuit of the thermopile is implemented. The amplifier working in weak inversion is introduced in order to reduce the power consumption. Because the output signal of the thermopile is very small, a chopper amplifier is needed in the front-end circuits to improve the SNR. Also, a switch-capacitor lowpass filter will be implemented following the chopper amplifier. To reduce the effects of process variation of amplifiers, a offset-cancellation technique is introduced. Dummy switches are used to reduce the clock feedthrough noise in our design.