Achieving sensing precision of 0.5nA in pixel with 7μs settling time by a new external current sensing circuit for amoled displays

Rajeev Pandey, Tzu Hao Huang, Wei Hsuan Ho, Paul C.-P. Chao, Eka Fitrah Pribadi

研究成果: Conference contribution同行評審

摘要

This study proposes a new push-pull transient current feedforward (PPTCF) based pixel current sensing circuit for active matrix organic light emitting diode (AMOLED) displays with precision within 0.5nA. A finite state machine (FSM) based digital control circuit is designed and developed for the baseline compensation. In order to achieve high accuracy the digital baseline compensation circuit also incorporates the current digital-to-analog converter (CDAC) and successive approximation current analog-to-digital converter (CADC). The minimum LSB current for the CADC is 10nA. The readout circuit is implemented in the integrated chip with chip area of 125μm × 46μm and fabricated via TSMC T18 process. With standard 3.3V supply, the experimental result shows that the overall power consumption of the chip is 990μW watt. Despite of all parasitic capacitances of the panel display, experimental results show that the proposed circuit can sense 0.5nA current within 7μs of settling time. The sensing precision of 0.5nA within 7μs are the best among all reported literature to date.

原文English
主出版物標題ASME 2019 28th Conference on Information Storage and Processing Systems, ISPS 2019
發行者American Society of Mechanical Engineers (ASME)
ISBN(電子)9780791859124
DOIs
出版狀態Published - 27 六月 2018
事件ASME 2019 28th Conference on Information Storage and Processing Systems, ISPS 2019 - San Diego, United States
持續時間: 27 六月 201928 六月 2019

出版系列

名字ASME 2019 28th Conference on Information Storage and Processing Systems, ISPS 2019

Conference

ConferenceASME 2019 28th Conference on Information Storage and Processing Systems, ISPS 2019
國家United States
城市San Diego
期間27/06/1928/06/19

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