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Total knee replacement (TKR) surgeries are increasing worldwide due to the aging population and the growing activity levels of middle-aged patients. Continuous monitoring of knee-joint loading is crucial for enhancing implant design, facilitating early failure detection, and informing personalized rehabilitation. Triboelectric nanogenerators (TENGs), which convert mechanical energy into electrical energy through contact electrification and electrostatic induction, are attractive for wearable and implantable electronics owing to their high energy density and mechanical flexibility. However, implantable TENGs are often limited by small surface areas and low internal capacitance, which makes energy harvesting challenging. To address this limitation, this work employs TENGs as pressure sensors rather than energy harvesters. We present a TENG model suitable for integration into TKR implants and propose a low-power sensor interface that rectifies and digitizes the signal using a dual-output rectifier (DOR) and a 10-bit SAR ADC. Under a 1-Hz gait-like excitation, the system measured force-dependent voltage responses and monotonic ADC outputs. These results show that the proposed TENG model and TENG sensor interface enable pressure/load monitoring in TKR implants.

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기사명 저자명 페이지 원문 목차
(A) design technique for highly parallel pseudo-random ternary sequences generators Jusung Park, Jintae Kim p. 1-5
(A) duty-cycled continuous-time delta-sigma modulator for ExG biopotential acquisition Woo Yub Chun, Jung Hyup Lee p. 6-11
Design and optimization of centimeter-scale long-reach on-chip interconnect for wafer-level computing Jiyong Park, Gwangmin Jung, Doona Song, Jintae Kim p. 12-19
A 4 - 8GHz analog duty cycle corrector with 30-70% correction range for high-speed serial interface Myeongju Park, Junyoung Song p. 20-24
Design study of a 120-GHz amplifier on InP HEMT technology J. Cho, J.H. Lee, Y.W. Kim, M. Kim p. 25-30
(A) multi-path hybrid DC-DC converter with reduced inductor current and wide voltage conversion ratio Jaekyun Kim, Chulwoo Kim p. 31-35
(A) high-efficiency hybrid buck-boost photovoltaic energy harvester with adaptive fractional open-circuit voltage maximum-power-point-tracking control Phan Dang Hung, Van Thai Trinh, Yechan Park, Minkyu Je p. 36-42
(A) 6-bit digitally controlled vector-sum phase shifter with current steering architecture Jeong Su Lee, Woong Joo Chang, Kwang Ho Jang, Tae Hwan Jang p. 43-48
Design of a 6-bit broadband differential digital attenuator using a hybrid topology for DC–13 GHz systems Jeong Hu Nam, Woong Joo Chang, Kwang Ho Jang, Tae Hwan Jang p. 49-54
Dynamic performance enhancement of a current-steering DAC using tree-structured routing and power mesh-based SI/PI optimization Inho Jang, Hyeonwoo Kim, Jiwon Seo, Minjae Seo p. 55-59
Triboelectric nanogenerator modeling and triboelectric nanogenerator-based pressure-sensor interface for implantable total knee replacement Yunchul Chung, Minkyu Je p. 60-64
(A) CMOS LiDAR sensor using time-to-voltage converter for elder-care applications Somi Park, Sunkyung Lee, Bobin Seo, Sung Min Park p. 65-69
Design study of a 630-GHz injection-locked oscillator based on InP HBT technology Giyeong Nam, Jae-Sung Rieh p. 70-75

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