• Proceedings of the Materials Research Society of Korea Conference
• /
• 1999.11a
• /
• pp.88-88
• /
• 1999

• Proceedings of the Korean Vacuum Society Conference
• /
• 2002.06a
• /
• pp.92-92
• /
• 2002

• 전기의세계
• /
• v.13 no.3
• /
• pp.21-27
• /
• 1964

A method of triggering a series connected complementary transister flip-flop is described. Also measurements have been made for the operation region with respect to the input pulse variation. This circuit is compared with a Eccles-Jordan flip-flop when it used as a Nixie tube driver of a neon lamp driyer.

• Journal of the Korean Institute of Telematics and Electronics A
• /
• v.30A no.7
• /
• pp.32-37
• /
• 1993

A novel insulated gate bipolar transister (IGBT), called insulated trench cathode IGBT (ISTC-IGBT), is proposed. ISTC-IGBT has a trenched well with the shallow P$^{+}$ juction in the conventional IGBT structure. The proposed structure has the capability of effectively suppressing the parasitic thyristor latchup. The holding current of ISTC-IGBT is about 2.2 times greater than that of the conventional IGBT. Detailed analysis of the latchup characteristics of ISTC-IGBT is performed by using the two-dimensional device simulator, PISCES-II B.

• Proceedings of the IEEK Conference
• /
• 2002.07b
• /
• pp.1292-1295
• /
• 2002

The performance of the LSI improved drastically due to the progress of the semiconductor manufacturing technology in recent years. However, a new problem such as wiring delay and complication inside the LSI occurs. The study to solve these problems with much research organization is been doing. We tried to solve of these problems by using the neuron MOS transistor with 4-valued signal in addition to the binary signal. In this paper, We present, method which realizes 4-valued logic function. And, a designed circuit, is verified by using HSPICE.

• JOURNAL OF ELECTRICAL WORLD
• /
• s.269
• /
• pp.66-72
• /
• 1999

전력$\cdot$교통$\cdot$산업$\cdot$정보$\cdot$가전의 각 분야에서 파워일렉트로닉스를 지탱하는 소자로서 파워디바이스가 하는 역할은 매우 크다. 특히 최근에는 지구온난화대책으로서 $CO_2$의 배출규제와 화석에너지 고갈에 대한 대응이 요구되고 있다. 이를 해결하기 위해 각종 전기기기 분야에서는 파워일렉트로닉스를 활용한 산업용 모터의 제어와 에어컨$\cdot$냉장고 등의 자에너지, 그리고 환경보호를 위한 전기자동차의 보급, 태양광발전과 풍력발전 등의 신에너지의 개발이 활발해지고 있다. 이와 같이 파워일렉트로닉스의 발전은 사회에 커다란 혜택을 가져다주었으나 동시에 전원의 고조파와 EMC(Electro-Magnetic Compatoboloty)문제를 초래하고 있다. 고조파 문제에 대해서는 액티브필터용 IPM(Intelligent Power Module)등의 등자으로, 기기측에서 적극저긍로 대책을 강구하고 있으나, 한편 EMC의 대응은 고조파대책에 비하여 다소 어려움이 이TDj 업계 전체적으로는 이제야 대응이 시작된 단계이다. 최근 파워디바이스의 주류가 된 IBT(Insulted Gate Bipolar Transister)는 고속성과 저포화전압이 인정되었으나 IGBT가 갖고 이쓴 고속 Switching 특성 때문에 EMC대응이 문제가 되고 있다. 따라서 IGBT자신의 특성개선은 물론 환류다이오드의 회복전류의 소프트화, 패키지의 개량, IGBT의 신구동방식의 개발 등, 파워디바이스 전체적으로 EMC에의 대응이 시작되었다.

• Proceedings of the KIEE Conference
• /
• 1987.07b
• /
• pp.1573-1576
• /
• 1987

A 4-bit parallel-series A/D converter has been designed using a new matrix circuit and breadboarded with transister array(TPQ2483). The simple matrix circuit is substituted for D/A converter and sebtracter-multiplier. The system has been simulated with SPICE. This converter is capable of operating at clock rate of 20MHz.

• Journal of the Korean Institute of Telematics and Electronics
• /
• v.26 no.11
• /
• pp.1829-1838
• /
• 1989

This paper is proposed one method of the exact optimal switching pattern of Selected Harmonic Elimination(SHE) Pulse Width Modulation(PWM). It defined Harmonic Elimination Band (HEB) at Constant Voltage(CV) and sought all solutions which are included HEB. Then, it calculated the Generalized Klirr Factor(GKF) beling to this solution and decided the optimal switching pattern which is minimized GKF. This optimal switching solution is used as initial condition of Newto Raphson(NR) method of decided easily switching pattern at Variable Voltage(VV). We desined the inverter by Power Transister(PTR) and implemented variable speed drive of Induction Motor(IM) in order to verify the validity of this theoretical proposition, then shown this results by comparison and analysis.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.25 no.6B
• /
• pp.114-114
• /
• 2000

In this paper, a current comparative frequency automatic tuning circuit for the CMOS bandpass filter are designed with the new architecture. And also, when the designed circuit is compared the typical tuning circuit, it has very simple architecture that is composed of the current comparator and charge pump and operated in 2V power supply. The proposed tuning circuit automatically compensate the difference between the operating current of the integrator and the reference current which is specified. Using CMOS 0.25um parameter, a CMOS bandpass active filter with center frequency(f0= 100MHz) is designed, and according to the transister size the variation of the center frequency is simulated. As the HSPIC simulation results, the tuning operating of the proposed current comparative frequency automatic tuning circuit is verified.

• Proceedings of the KIEE Conference
• /
• 1990.07a
• /
• pp.430-432
• /
• 1990

This paper concerns a method for high precision torque control of induction motor supplied with power via a Transister inverter. The control system is totaly digitized using DSP - TMS32010.Since operation time leads to control delay in such a system, torque ripples are more significient than relieved considerably by using current preview control and vector pulse width control. The usefulness of these techniques will be demonstrated by showing the results of a simulation,and results of measurement on a 2.2Kw induction motor.