• 대한전자공학회논문지SD
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• 제48권7호
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• pp.17-22
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• 2011

본 논문에서는 인덕티브 커플링 송수신 회로를 위한 효과 적인 신호 전달 기법을 제안하기 위하여 인덕티브 커플링 채널과 기존의 신호 전달 기법들을 분석 하였다. 신호 전달 기법을 공정히 비교하기 위하여 새로운 성능 비교 지수를 소개하고 이를 토대로 비교 결과를 산출할 시 NRZ 신호 전달 기법이 기존에 제안 되었던 BPM 신호 전달 기법보다 더 우수함을 나타내었다. 모의실험은 CMOS 0.13${\mu}m$ 공정을 이용하여 송수신 회로를 설계하였으며 인덕터는 칩 내 spiral 인덕터를 가정하여 모델링 하였다.

• JSTS:Journal of Semiconductor Technology and Science
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• 제14권2호
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• pp.227-234
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• 2014

A transceiver for a high-speed inductive-coupling link is proposed. The bi-phase modulation (BPM) signaling scheme is used due to its good noise immunity. The transmitter utilizes a complementary switching method to remove glitches in transmitted data. To increase the timing margin on the receiver side, an integrating receiver with a pre-charging equalizer is employed. The proposed transceiver was implemented via a 130-nm CMOS process. The measured timing window for a $10^{-12}$ bit error rate (BER) at 1.8 Gb/s was 0.33 UI.

• Journal of Power Electronics
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• 제9권1호
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• pp.18-25
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• 2009

Conventional series-resonant pulse frequency modulation controlled DC-DC high power converters with a high-frequency transformer link which is designed for driving the high power microwave generator has the problem of hard switching commutation at turn-on and turn-off of active power switching devices. This problem is due to the influence of the magnetizing current of the high-frequency transformer. This paper presents a novel prototype for a high-frequency transformer using parasitic parameters with a lossless inductive snubber and a series resonant capacitor assisted series-resonant zero current switching pulse frequency modulated DC-DC power converter, which is designed using a high power magnetron for microwave ovens. In order to implement a complete and efficient soft switching commutation, the performance of the new converter topology is practically confirmed and evaluated in the prototype of a power microwave generator.

• JSTS:Journal of Semiconductor Technology and Science
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• 제17권1호
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• pp.120-128
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• 2017

This paper describes a neural stimulation system that employs an inductive coupling link to transfer power and data wirelessly. For the reliable data and power delivery, a self-referenced amplitude-shift keying (ASK) demodulator and a wide-range voltage regulator are suggested and implemented in the proposed stimulator system. The prototype fabricated in 0.35 um BCD process successfully transferred 1.2 Kbps data bi-directionally while supplying 4.5 mW power to internal MCU and stimulation block.

• 전자공학회논문지A
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• 제32A권7호
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• pp.43-50
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• 1995

In this paper, the variational method are used for the filter analysis methods and a CAD program for the design of the waveguide low-loss bandpass filters using inductive window structures for the VSAT(Very Small Aperture Terminal) system has been developed based on the passband correction method combined with fiter synthesis procedures. Using the developed CAD program, 0.01dB equi-ripple chebyshev type 6-section bandpass filters which are sued in the VSAT system operating nationally are designed for the purpose of the Down-link of 12.75~13.25GHz and the Up-link of 14.0~14.5GHz, fabricated and mesured. The measured results are good agreement woth the theoretical resuls.

• 한국통신학회:학술대회논문집
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• 한국통신학회 2004년도 추계종합학술대회 논문 초록집
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• pp.419-419
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• 2004

• 대한의용생체공학회:의공학회지
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• 제29권3호
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• pp.187-190
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• 2008

This paper presents two dimensional receiving coils to provide hundreds of milli-watt power via inductive link to in vivo robotic capsules, whose orientation are practically undetermined. The wireless power transmission system consists of a transmitter powered by class E power amplifier, and a receiver with three dimensional antenna, rectifier, and voltage regulator. As the 2D lateral antenna construction is more critical for the receiving antenna, two types of 2D antennas are introduced and evaluated by theoretic and experimental analyses. Experimental results verifies that the cross-type construction show better directional performance for receiving power than the cylindrical one for the 2D antenna. The former could deliver the power homogeneously regardless of its orientation, with less than 20 % of variation from the possible maximum power.

• 재활복지공학회논문지
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• 제11권1호
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• pp.63-71
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• 2017

본 논문에서는 달팽이관의 정원창 이식용으로 최근 새롭게 제안된 3코일 벨로우즈형 진동체(tri-coil bellows transducer, TCBT)를 이용하는 반이식형 인공중이(semi-implantable middle ear hearing device)를 위한 신호처리회로를 설계하였다. 설계된 반이식형 인공중이는 높은 효율을 가지는 유도결합 방법을 이용하여 귀 뒤편에 착용되는 체외기와 대응되는 피부 내측에 위치하는 체내기 간에 데이터를 전송한다. 귀 뒤 부위의 피부두께를 포함하는 반이식형 인공중이의 송수신 거리를 고려하여 송수신 코일과 신호처리 회로를 설계 및 구현하였다. 또한 데이터 전송 효율을 높이기 위하여, 전력을 충분히 증폭하기 위한 체외기의 출력부도 설계 하였다. 유도결합 방식을 이용한 반이식형 인공중이의 동작을 확인하기 위하여, PSpice를 이용하여 회로해석을 수행하였으며, 활용 가능한 크기의 신호처리 보드를 제작하여 그 성능을 검증하였다.

• 대한전자공학회논문지SD
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• 제48권12호
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• pp.37-44
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• 2011

본 논문은 BPM 방식의 신호전송을 하는 인덕티브 커플링 링크에서 전송속도를 증가시키고 BER를 개선하는 방법에 대하여 기술하였다. 데이터가 전송될 때 발생하는 불필요한 glitch를 제거하기 위해 상보적으로 스위칭하는 송신기를 사용하였고, 수신된 데이터의 최적화를 위해 pre-distortion 개념을 도입하였다. 또한 고속 동작에서 샘플링 가능구간을 확보하기 위해 적분형 수신기를 사용하였고, 빠른 pre-charge를 위해 수신기 내부의 적분기와 비교기의 pre-charge 경로에 이퀄라이징 트랜지스터를 추가하였다. 0.13 um CMOS 공정을 사용하여 설계한 송수신회로는 1.2 V 인가전압에서 2.4 Gb/s의 전송속도를 가질 때 약 5.99 mW의 전력소모를 가진다.

• Journal of Electrical Engineering and Technology
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• 제13권1호
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• pp.333-344
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• 2018

This proposed paper aims for the high efficiency contactless power transfer in household dc power distribution. A 300 W five-level diode clamped multi-level converter with 300 Vdc input dc link bus is employed for the power transferring task and the output voltage range is controlled at 48 Vdc. The inner and outer solenoid coils are used for inductive power transfer (IPT) transformer with the 200 kHz switching frequency for designed power density. Therefore, to achieve the converter efficiency above 95%, the LLC series resonant with fundamental harmonic analysis (FHA) and the calculated switching angles are used as an optimized tool for designing the system resonant tank. The validations of this approached topology are illustrated in both MATLAB/Simulink simulation and implementation.