Design and Implementation of OLED Driving and OPD Readout Circuitry for an Optical Vibration Sensor

Yi Cheng Wu, Yung Hua Kao, Chang-Po Chao, Chin Long Wey, Thilo Sauter, Fitrah P. Eka, Rajeev Pandey

研究成果: Conference contribution同行評審

摘要

This study presents an organic light-emitting diode (OLED) drive circuit and an organic photo detector (OPD) readout circuits for a vibration sensor. Vibration sensor consist of micro-electro-mechanical systems (MEMS), which are OLED and OPD needs to be integrated for many applications in automation or consumer electronics. The light flux is generated by an OLED located on top of the structure and the modulated light flux is measured by an OPD. The OLED drive circuit contains pulse width modulation (PWM) driver to control PWM output for optimization of voltage operation is designed in order to minimize power consumption efficiency of device. The readout circuit includes a trans-impedance amplifier (TIA) to convert incident light of OPD to voltage output, a 14-bit analog-to-digital converter (ADC) to extract amplitude of vibration level, circuit to generate clock for time-to-digital converter (TDC) which detect frequency of vibration sensor. The designed circuit has been successfully fabricated by using TSMC 0.18 μm CMOS process, the chip area is 1.012 mm 2 . The power consumption of chip is about 6.2 mW. The measured frequency of PWM is about 200 kHz with 50% duty cycle. The frequency range of the vibration can be sensed well as about 10 Hz1.5 kHz, and resulting in high SNR at frequencies under 60 Hz.

原文English
主出版物標題2018 IEEE SENSORS, SENSORS 2018 - Conference Proceedings
發行者Institute of Electrical and Electronics Engineers Inc.
ISBN(電子)9781538647073
DOIs
出版狀態Published - 26 十二月 2018
事件17th IEEE SENSORS Conference, SENSORS 2018 - New Delhi, India
持續時間: 28 十月 201831 十月 2018

出版系列

名字Proceedings of IEEE Sensors
2018-October
ISSN(列印)1930-0395
ISSN(電子)2168-9229

Conference

Conference17th IEEE SENSORS Conference, SENSORS 2018
國家India
城市New Delhi
期間28/10/1831/10/18

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