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0.35 μm CMOS 공정으로 제작된 UHF 대역 RFID 태그 칩 통신 제어부 설계
트란 난,파함 듀이 동,이 종욱 경희-다반 ASIC 설계교육센터 2006 경희-다반 ASIC센터 논문집 Vol.7 No.-
We present the control circuit for reader to tag communication in UHF band RFID tag chip. The system clock of tag chip is generated by the internal oscillator with digital calibration to maintain stable clock signal. The control circuit designed using standard 0.35 pm CMOS process shows the correct operation of analog front-end of RFID tag chip. Together with verifying the combination of circuits of the analog front end, we present the design considerations of the comparator with internal hysteresis and the internal oscillator with calibration.
0.18 μm CMOS 공정으로 설계된 아날로그-디지털 변환기를 내장한 Wireless 온도 센서 설계
파함 듀이 동,트란 난,이 종욱 경희-다반 ASIC 설계교육센터 2006 경희-다반 ASIC센터 논문집 Vol.7 No.-
A simple and practical architecture for RF-powered wireless temperature sensor is presented. The tag chip receives its power supply from a RF-DC converter which recovers DC power from a small incident signal. Ambient temperature is estimated by a temperature-voltage converter, and a single-slope ADC converts the temperature-dependent voltage to digital data. This approach does not depend on the temperature dependence of oscillator frequency, thus, does not require complex post processing such as laser trimming in the practical implementation of the temperature sensor. With on chip ADC, this proposed temperature sensor has a sensitivity of 6744 ppm/oC. We investigated the operation of the wireless, remotely-power sensor tag chip using standard 0.18 pm CMOS technology.