• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2013년도 춘계학술대회
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• pp.1020-1022
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• 2013

본 논문에서는 펄스방사선 선량 측정을 위한 Peak Detector를 설계하였다. 펄스방사선은 수ns ~ 수십ns의 초고속의 신호로 Peak 값을 측정하기 어렵다. Peak Detector는 센서에서 발생한 Peak 전압을 수ms 동안 유지하므로 ADC를 이용하여 데이터를 쉽게 측정할 수 있다. Peak Detector 시뮬레이션 결과 Peak 값을 1ms 이상 유지하는 것을 확인하였으며 펄스방사선 조사시험 결과 $1.95{\times}10^6rad/s$의 선량을 확인하였다.

• Journal of Advanced Marine Engineering and Technology
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• 제23권2호
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• pp.210-215
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• 1999

The proposed detector is consists of three-phase sinusoidal signal generator and peak detector. This peak detector can detect the peak voltage value at the state of variable frequency. In experi-ment three-phase sinusoidal signals are generated from D/A converter using IBM PC and deliv-ered to the peak detector. Each signals are squared by multiplier and summed up Peak value is the square root of summed value extracted by square root circuit.

• Journal of Electrical Engineering and Technology
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• 제6권5호
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• pp.658-665
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• 2011

In the present paper, a novel fast peak detector for single- or three-phase unsymmetrical voltage sags is proposed. The proposed detector is modified from a single-phase digital phase-locked loop based on a d-q transformation using an all-pass filter (APF). APF generates a virtual phase with $90^{\circ}$ phase delay. However, this virtual phase cannot reflect a sudden change of the grid voltage in the moment of voltage sag, which causes a peak value to be significantly distorted and to settle down slowly. Specifically, the settling time of the peak value is too long when voltage sag occurs around a zero crossing, such as phase $0^{\circ}$ and $180^{\circ}$. This paper describes the operating principle of the APF problem and proposes a modified all-pass filter (MAPF) to mitigate the inherent APF problem. In addition, a new fast peak detector using MAPF is proposed. The proposed detector is able to calculate a peak value within 0.5 ms, even when voltage sag occurs around zero crossing. The proposed fast peak detector is compared with the conventional detector using APF. Results show that the proposed detector has faster detection time in the whole phase range. Furthermore, the proposed fast peak detector can be effectively applied to unsymmetrical three-phase voltage sags. Simulation and experimental results verify the advantages of the proposed detector and MAPF.

• 한국군사과학기술학회지
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• 제23권5호
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• pp.516-522
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• 2020

In this paper, the frequency detector which detects the clock frequency of the embedded system is proposed and analyzed. The proposed frequency detector is consisted of filter and peak voltage detector. The clock signal is converted from square wave to triangular wave by the filter. The peak voltage of the triangular wave is determined according to the frequency response of filter. The peak voltage detector detects and holds the peak voltage of the signal. Moreover, the proposed clock frequency detector can detect the frequency within 1ms and it gives guarantee of real-time operation.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2000년도 하계종합학술대회 논문집(2)
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• pp.217-220
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• 2000

In this paper, A low-power MOS monolithic peak detector is presented. Designed for monolithic and low-power characteristics, this MOS peak detector can be integrated easily on the same chip as a module of large communication systems. The simulation results of this peak detector which was composed with four NMOSs and two capacitors show the power dissipation of 0.972㎽ and the good operations for 2㎓ operating pulse frequency. Therefore, it may be used as a functional block for various signal processing systems.

• 한국항해항만학회지
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• 제36권5호
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• pp.371-378
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• 2012

본 논문에서는 OQPSK(Offset Quadrature Phase Shift Keying) 변복조를 사용하는 수중음향통신에서 시간동기회복을 위해 기존의 Gardner TED(Timing Error Detector)에 Parabolic Peak Interpolation 을 사용하는 Peak Detector를 첨가하여 위상 수렴속도를 상승시켜 송신 데이터양의 감소를 도모하였다. Parabolic Peak Interpolation을 이용하여 지속적으로 국소 최대 또는 최소의 근사치로 이동한 후 Gardner TED를 적용하기 때문에 시간동기화 안정화를 속도를 빨리함으로써 Preamble 구간의 데이터양을 절반으로 줄일 수 있고 또한 Preamble 구간에서도 위상 수렴을 하지 못하는 임계치에서 제안한 방법을 시뮬레이션한 결과 임계점에서 BER(Bit Error Rate)이 약 23%정도 성능이 개선되는 것을 확인할 수 있었다. 또한 실제 동해에서 수집한 데이터를 사용하여 기존의 Gardner TED만 사용하는 방법과 성능 비교 결과 송수신기 사이의 거리가 3 km 이었을 때 제안한 방법을 적용한 경우 기존의 방법에 비해 Converge speed가 1.4배 이상 상승하는 것을 확인할 수 있었고, BER측면에서도 약 20%정도 상승하는 것을 확인할 수 있었다.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2001년도 하계종합학술대회 논문집(2)
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• pp.149-152
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• 2001

In this paper, a 1.5V 2㎓ low-power peak detector is presented. Analyzing the designed peak detector circuit which is composed with two NMOSs, two diodes, and two capacitors, the detection characteristic relationships are derived. The simulation results with SPICE for 2㎓ pulse signals and sinusoidal signals on the 1.5V supply voltages show the good detection characteristics for input signal levels of 50㎷~500㎷, and show very small power dissipation of 0.332㎽.

• 전기학회논문지
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• 제57권7호
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• pp.1195-1199
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• 2008

In this paper, peak detector of generator's output voltage and variable gain controller are introduced for a fast dynamic response. The conventional r,m.s, signal detected has inherent time delay, and the dynamic response of generator using conventional PID controller has some problem in sudden load change. In this paper, the peak detector and signal selector with variable gain controller is used to overcome this problem. The main controller can check the voltage state from the peak detector. When a sudden load change, the over-voltage and under-voltage signal from peak detector change the controller's gain and exciter's current reference. The proposed scheme can improve the dynamic response, which is verified from experimental test of 200kW diesel engine-generator.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2010년도 추계학술대회
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• pp.776-779
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• 2010

본 논문은 CSAM의 게이트 피크 검출장치를 단일 칩 기반으로의 구현을 제안한다. 게이트 피크 검출장치의 구현은 VHDL을 이용한다. 제안된 방법은 초음파 현미경 뿐만 아니라 게이트 피크 검출을 이용하는 모든 시스템에 적용과 통합이 가능하며 기존의 방법과 비교하여 면적과 응용면에서 효율의 차별화를 제시한다.

• 약학회지
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• 제39권5호
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• pp.480-486
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• 1995

The change in discharge current of a glow discharge has been shown the potential sensitive detector for gas chromatography. To investigate the effect of carrier gas on the electrical characteristics of the discharge and the peak response, the discharge pressure, gas flow rate, and discharge gap have been studied. The discharge gas included the Ar, He, and N$_{2}$. The gas flow rate has been found one of the important parameters to affect both the electrical characteristics and the peak response.