An LTPS TFT Demodulator for RFID Tags Embeddable on Panel Displays

Autor:	Yi-Jan Emery Chen, Yueh-Hua Yu, Yuan-Jiang Lee, Yao-Jen Hsieh, Yu-Hsuan Li, Chun-Ting Liu, Chun-Huai Li, Chung-Hung Kuo
Rok vydání:	2009
Předmět:	Engineering Radiation business.industry Transistor Electrical engineering High voltage Condensed Matter Physics Amplitude-shift keying law.invention Threshold voltage CMOS law Thin-film transistor Electronic engineering Demodulation Electrical and Electronic Engineering business Electronic circuit
Zdroj:	IEEE Transactions on Microwave Theory and Techniques. 57:1356-1361
ISSN:	1557-9670 0018-9480
Popis:	This paper presents an amplitude-shift-keying (ASK) demodulator for RF identification tags, which can be embedded on panel displays. The ASK demodulator was implemented in 3-mum low-temperature polycrystalline silicon (LTPS) thin-film transistor (TFT) technology. Since the threshold voltages of LTPS TFTs are higher than CMOS transistors, the conventional demodulator implementation will degrade the demodulator sensitivity significantly. The novel full-wave demodulator circuit was proposed to resolve the issue of high threshold voltage and reduce the ripples of the demodulated envelope. Operated at 8 V, the demodulator consumes 1.6 mW of power. The input carrier frequency was tested up to 13.56 MHz, and the highest ASK modulated data rate is 100 kb/s. The circuit size of the LTPS TFT demodulator is 500 mum times 450 mum.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7bf0126c59c915dcfc0d6904bc9532e8 https://doi.org/10.1109/tmtt.2009.2017312 Zobrazit plný text záznamu