TY - GEN
T1 - Design and Implementation of OLED Driving and OPD Readout Circuitry for an Optical Vibration Sensor
AU - Wu, Yi Cheng
AU - Kao, Yung Hua
AU - Chao, Paul C.-P.
AU - Wey, Chin-Long
AU - Sauter, Thilo
AU - Eka, Fitrah P.
AU - Pandey, Rajeev
N1 - Publisher Copyright:
© 2018 IEEE.
PY - 2018/10/28
Y1 - 2018/10/28
N2 - 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.
AB - 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.
KW - PWM drive
KW - analog-to-digital converter
KW - time-to-digital converter
KW - trans-impedance amplifier
KW - vibration sensor
UR - http://www.scopus.com/inward/record.url?scp=85060870864&partnerID=8YFLogxK
U2 - 10.1109/ICSENS.2018.8589652
DO - 10.1109/ICSENS.2018.8589652
M3 - Conference contribution
AN - SCOPUS:85060870864
T3 - Proceedings of IEEE Sensors
SP - 1
EP - 4
BT - 2018 IEEE SENSORS, SENSORS 2018 - Conference Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 17th IEEE SENSORS Conference, SENSORS 2018
Y2 - 28 October 2018 through 31 October 2018
ER -