標題: | A new readout/driver circuitry for an optical vibration sensor |
作者: | Wu, Chun-Hao Chao, Paul C. -P. Wu, Yi-Cheng Sauter, Thilo Zan, Hsiao-Wen 電子工程學系及電子研究所 光電工程學系 Department of Electronics Engineering and Institute of Electronics Department of Photonics |
關鍵字: | TIA;OLED driver;analog readout circuit;SAR ADC;PWM control |
公開日期: | 1-一月-2017 |
摘要: | This work presents research results on designing the drive and readout circuits for a newly-developed optical vibrations sensor. Tes sensor consists of organic light-emitting diodes (OLEDs) and photodetectors (OPDs) and micro-structure to realize the function of vibration sensing. Proper operations of OLEDs and OPDS needs a driver and a readout circuit, respectively. A driver circuit is designed for driving and controlling OLED light; also, a readout circuit is designed to acquire current signal from OPD and then converts it to digital signals by an analog-to-digital converter (ADC). In addition to readout circuit, a front-end amplifier called transimpedance amplifier (TIA) is designed for converting the output current of the OPDs. The TIA is followed by an IA and LPF for better signal quality before a SAR ADC designed for converting the vibration amplitude to digits. The resolution of 10-bit ADC sub-circuit is 1.95mV/LSB. It is suitable for OPD current output. Moreover, a pulse width modulation (PWM) driver circuit which is designed with frequency output 200 KHz is suitable for driving OLED. The proposed circuit is fabricated by TSMC 0.35-mu m CMOS process where the area is 4.5 mm2 for the whole chip while power consumption is 7.808 mW. |
URI: | http://hdl.handle.net/11536/147158 |
ISSN: | 1930-0395 |
期刊: | 2017 IEEE SENSORS |
起始頁: | 421 |
結束頁: | 423 |
顯示於類別: | 會議論文 |