• Proceedings of the KIPE Conference
• /
• 1998.11a
• /
• pp.5-8
• /
• 1998

The adaptation to vector control theory is so generalized that it is widely used for implementing the high-performance of AC machine. Nowadays, One-Chip microprocessors or DSP chips are being well-used to implement Vector Control algorithm. DSP Chip have less flexibility for memory decoding and I/O rather than One-Chip microprocessor so that is requires more additional circuit and high cost. And the past One-Chip micro processors have difficult of implementation the complex algorithm because of small memory capacity and low arithmetic performance. Therefore we implemented the vector control algorithm of PMSM(Permanent Magnetic Synchronous Motors) using 80296SA form intel , which have many features as 6M memory space, 500MHz clock frequency, including memory decoding circuit and general I/O, Special I/O(EPA, Interrupt controller, Timer/Count, PWM generator) which is proper controller for the complex algorithm or operation program requiring so much memory capacity, So in this paper we fully digitized the vector control of PMSM included SVPWM Voltage controller using the intel 80296SA

• Proceedings of the IEEK Conference
• /
• 2003.07b
• /
• pp.755-758
• /
• 2003

본 논문에서 단거리전용통신(DSRC)용 OBE에 사용되는 5.8GHz 송신측 ASK와 PA를 one-chip화하여 MMIC로 설계를 및 제작하였다. 설계된 ASK-PA는 3V 단일 공급전원을 사용하였고, 능동 소자로서 GaAs MESFET을 사용하였다. ASK는 회로의 복잡도를 줄이기 위해 직접변조 방식을 채택하였고, 인접채널 간섭의 영향을 줄이기 위하여 드레인 제어 변조회로를 사용하였다. 또한 전력증폭기는 2단으로 하여 AB급으로 동작하도록 전압분배 바이어스회로로 구성하였다. 측정결과 3V의 공급전압에서 전체이득 20.63dB, 송신출력 7.8dBm으로 나타냈다. 공정은 ETRI 0.5㎛ GaAs MESFET 공정을 사용하였고, Chip size는 1.2mm×l.4mm이다.

• Proceedings of the IEEK Conference
• /
• 2001.06b
• /
• pp.193-196
• /
• 2001

One of the major reasons for not integrating a VCO on one-chip in a PLL (phase locked loop) system is the large chip-to-chip variation of the VCO (voltage controlled oscillator) center frequency. In this thesis, a simple bias technique is proposed to compensate the process fluctuation. The proposed bias technique is applied to the VCO and it reduces the deviation of the VCO center frequency from 35% to 8 %. With the suggested bias technique, a 400 MHz frequency synthesizer is designed for general purpose. It utilizes a programmable divider for various division ratio. The design methodology provides the possibility of the one-chip solution for a PLL system.

• Biotechnology and Bioprocess Engineering:BBE
• /
• v.9 no.2
• /
• pp.100-106
• /
• 2004

Micro-fluidics is one of the major technologies used in developing micro-total analytical systems (${\mu}$-TAS), also known as “lab-on-a-chip”. With this technology, the analytical capabilities of room-size laboratories can be put on one small chip. In this paper, we will briefly introduce materials that can be used in micro-fluidic systems and a few modules (mixer, chamber, and sample prep. modules) for lab-on-a-chip to analyze biological samples. This is because a variety of fields have to be combined with micro-fluidic technologies in order to realize lab-on-a-chip.

• Journal of the Korean Institute of Telematics and Electronics A
• /
• v.28A no.12
• /
• pp.46-52
• /
• 1991

A new signal process circuit using two ISFETs as the input devices of the MOS differential amplifier stage for an ISFET biosensor has been developed. One chip integration of the newly developed signal process circuit, ISFETs and a Pt quasi-reference electrode has been carried out according to modified LOCOS p-well CMOS process. The fabricated chip showed gains of 0.8 and 1.6, good liniarity in the input-output relationship and very small power dissipation, 4mW. The chip was applied to realize a urea sensor by forming an immobilized urease membrane, using lift-off technique. on the gate of an ISFET. The urea sensor chip showed stable responses in a wide range of urea concentrations.

• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 1995.10a
• /
• pp.271-275
• /
• 1995

Chip control is a major problem in automatic machining process, especially in finish operation. Chip breaker is one of the important factors to be determined for the scheme of chip control. As unbroken chips are grown, there deteriorate quality of the surface roughness and process automation can be carried out. In this study, to get rid of chip curling problem while turning internal hole, optimal chip breaker is selected form the experiment. The experiment is planned with Taguchi's method that is based on the orthogonal arrary of design factor. From the respose table, cutting speed, feedrate, depth of cut, and tool geometry are major factors affecting chip formation. Then, optmal chip breaker is selected and this is verified good enough for chip control from the experiment.

• Proceedings of the Korea Institute of Applied Superconductivity and Cryogenics Conference
• /
• 2003.02a
• /
• pp.189-192
• /
• 2003

Inductivity Superconducting Fault Current Limiter is the Magnet that uses high temperature Superconductivity Coil. It is an important work that it controls Electric Power Converter of Inductivity SFCL. So, we wish to design the point part FPGA by One-Chip. Design of that can divide as following. One part that generate clock that offer to thyristor. One part that set 60Hz voltage to input Clock and do count. One part that change the value that require in CPU to the integer. And finally. there is part that send output (the fixed Clock) to the thyristor.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
• /
• v.13 no.6
• /
• pp.514-520
• /
• 2002

In this paper, the study of a design and fabrication of the receiver MMIC mixer for L-band application is described. The mixer is composed of active LO and RF balun to integrate on a chip and applied a newly proposed bias circuit to compensate the process variations of active devices. The conversion gain of the mixer is -14 dB, IIP3 is approximately 4 dBm and port-to-port isolation is over 25 dB. The newly proposed bias circuit is composed of a few FETs and resistors, and can compensate the variation of the threshold voltage by the process variations, temperature changes and etc. The designed chip size is $1.4\;mm{\times}1.4\;mm$.

• Proceedings of the Korean Institute of Intelligent Systems Conference
• /
• 2000.05a
• /
• pp.146-149
• /
• 2000

In this paper, Computer Colour Matching and Kitchen System (CCMKS) is developed on the basis of delphi package and one-chip processor with fuzzy-PID control. CCMKS will be widely used in the colour dyeing industry as an integrated colour matching and dispensing system which have more advantages than the conventional matching or dispensing system, when controlling the real dyeing processes. Delphi is utilized in making database and search/matching routes. The developed matching function reduces the search and matching time to about one third. One-chip processor is designed and manufactured for the distributed control of three-phase induction motors. Fuzzy-PID control is applied to the speed control of three-phase induction motors for a very precise weight of colour at CCMKS. The developed kitchen function decreases the dispensing time to about one twentieth. The experimental results show CCMKS has more excellent search time, more precise weight and much high fidelity than conventional colour matching or dispensing system, in the performance.

• The Plant Pathology Journal
• /
• v.30 no.1
• /
• pp.51-57
• /
• 2014

A large-scale oligonucleotide (LSON) chip was developed for the detection of the plant viruses with known genetic information. The LSON chip contains two sets of 3,978 probes for 538 species of targets including plant viruses, satellite RNAs and viroids. A hundred forty thousand probes, consisting of isolate-, species- and genus-specific probes respectively, are designed from 20,000 of independent nucleotide sequence of plant viruses. Based on the economic importance, the amount of genome information, and the number of strains and/or isolates, one to fifty-one probes for each target virus are selected and spotted on the chip. The standard and field samples for the analysis of the LSON chip have been prepared and tested by RT-PCR. The probe's specific and/or nonspecific reaction patterns by LSON chip allow us to diagnose the unidentified viruses. Thus, the LSON chip in this study could be highly useful for the detection of unexpected plant viruses, the monitoring of emerging viruses and the fluctuation of the population of major viruses in each plant.