• Proceedings of the Korean Society of Precision Engineering Conference
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• 1994.10a
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• pp.365-370
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• 1994

로드 셀의 정밀측정 에러의 가장 큰 요인은 온도에 의한 출력특성 변화이다. 본 논문에서는 주어진 어떤 온도 구간에서만 온도특성을 보상하였던 기존의 방법에 비해 보다 넓은 온도구간에서 로드 셀의 출력의 온도 특성을 보상하고 또한 출력의 온도 특성이 기존의 방식에 의한 것보다 개선된 새로운 로드셀의 온도보상 방법을 제안 하였다.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.21 no.3
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• pp.223-228
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• 2010

In this paper, temperature compensation circuit for the X-band voltage controlled oscillator(VCO) is presented by using the temperature sensor with the OP-AMP circuit. The frequency drifting by the temperature could be compensated by applying the tuning voltage which include the linearly changing output voltage of the temperature sensor. As a result, the frequency variation is reduced to 6.6~4.4 MHzfrom the 71~73 MHz variation with the compensation circuit over -30~+$60^{\circ}C$ range, when VCO is operated in the frequency range of 9.95~10.05 GHz.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.13 no.10
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• pp.1025-1033
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• 2002

This paper presents temperature-compensation circuits of Ku-band amplifiers for satellite payload. After carefully investigating design specifications of Ku-band amplifiers for satellite payload, we designed three types or temperature-compensation circuits, which are an active bias circuit, an attenuator control, and an ALC loop circuit. Our design technique demonstrates good agreement between measured and predicted results. These temperature-compensation circuits are suitable for Ku-band satellite payload active components, such as channel amplifiers, LNA and IF amplifiers.

• Journal of IKEEE
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• v.16 no.3
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• pp.177-181
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• 2012

This paper introduces a thermal compensation circuit with improved compensation characteristic for amplifiers to provide stable output power regardless environmental temperature. The proposed thermal compensation circuit is composed of two branchline couplers having two diodes between them. And, the thermistor whose resistance varies significantly with temperature inversely and a operational amplifiers, so called as OP-amp, control the diodes in the compensations circuit to realize more effective thermal compendation characteristic compared with conventional circuit.

• Journal of Sensor Science and Technology
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• v.9 no.4
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• pp.268-273
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• 2000

This paper represents a hot-film flow sensor which is compensated by a noble temperature compensation method using the initial unbalanced voltage. The resistance value of the sensor is determined by using the graph of the initial unbalanced voltage of an open-loop circuit against the air temperature. The compensation is accomplished by applying the unbalanced ratio of the resistors in the Wheastone bridge circuit. In the range of air temperature of $-20^{\circ}C{\sim}120^{\circ}C$, the error is about ${\pm}1%$.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.46 no.8
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• pp.12-17
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• 2009

We have implement어 a bust mode optical transmitter using digital temperature compensation architecture with a microprocessor. Instead of previous analog real time technique, we used digital sampling and holding technique for the temperature compensation in order to get stable high speed data transmission of the laser diode. This digital temperature compensation technique should be complemented the previous analog method with accuracy and effectiveness in the over Gb/s transmitting application.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.13 no.5
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• pp.484-491
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• 2002

This paper presents the results of a study of voltage-controlled PIN diode attenuators for Ku-band satellite payload and suggests the temperature-compensation method of these attenuators. The PIN diode attenuators are designed using thin-film hybrid techniques. The load resistance for maximum linear characteristics is determined by simulation and measurements. In the case of APD0805, load resistance of 150 $\Omega$ gives attenuator up to 10 dB linear attenuation range per a PIN diode. Also, measurements over temperature of these PIN diode attenuators were performed. From these measurements, designed PIN diode attenuators shows the severe temperature dependency due to forward voltage variation. A temperature compensation method using thermistor is now suggested to compensate the temperature variation of these PIN diode attenuators. This circuit shows good linear characteristics over wide temperature range

• Journal of the KSME
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• v.32 no.6
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• pp.514-523
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• 1992

스트레인 게이지를 이용하여 변형측정을 할 때 온도변화의 영향으로 나타나는 겉보기 변형도와 게이지 상수의 변화에 대하여 설명하였고 실제 측정시 정확한 측정값을 얻기위한 온도보상 방 법에 대하여 기술하였다. 온도변화에 의한 겉보기 변형도의 값은 기계적 하중에 의한 변형도에 비하여 무시할 수 없는 큰 값을 나타내기 때문에 적절한 보상에 의하여 정확한 측정값을 얻어 내야 한다. 항공우주산업, 원자력산업 등의 분야에서 널리 응용되는 극저온 환경에서 겉보기 변 형도와 게이지 상수의 측정결과를 제시하였다. 극저온에서는 자체 온도보상된 스트레인 게이지라 할지라도 대단히 큰 온도영향을 받기 때문에 본시험에서 제시한 바와 같이 측정결과를 온도보 상하여 처리해야만 의미있는 결과를 얻을 수 있다. 본 시험에서 4차식으로 구해진 겉보기 변형 도에 대한 특성곡선과 게이지 상수에 대한 시험결과는 극저온에서 변형을 측정할 때 직접적으로 보상하여 사용될 수 있다.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2005.11a
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• pp.285-288
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• 2005

현재 국내 외에서 GIS용 광 CT가 활발히 연구 개발되고 있다. 이러한 광 CT는 전류와 온도의 변화에 따른 오차가 발생하는데 온도특성을 고려하여 온도변화에 따른 출력신호의 오차를 감소시키고 전류를 더욱 정밀하고 안정적으로 측정 가능하도록 온도보상 시스템이 필요하다. 본 논문에서는 온도보상 시스템 연구를 위한 광 CT의 온도보상 특성에 대한 연구 계획을 기술하였다.

• Journal of the Korean Institute of Intelligent Systems
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• v.23 no.2
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• pp.107-112
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• 2013

In the paper, velocity controller of switching module and temperature controller for the high-voltage static var compensator are proposed. Because of the continuous increase in demand for electric power, transmission and distribution facilities of power plant are required. There is a bottleneck problem of transportation routes according to new construction and expansion of power transmission facilities. Therefore there are researches to maximize the utilization of existing facilities and to increase transmission capacity without new construction. The previous static var compensator detects voltage of input circuit of power, switches the SCR directly and generates switching noise. The proposed method increases switching velocity and decreases noise using switching control based on the voltage between both sides of SCR. Also the proposed method enhance the stability using realtime temperature control for heating of the system from increase of switching velocity. We experiment the velocity and temperature control of the proposed high-voltage static var compensator in the real environment and verify the performance of the proposed system by applying in the real field.