• Journal of Electrical Engineering and Technology
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• v.6 no.2
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• pp.270-274
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• 2011

This paper presents a parameterized simulation program with integrated circuit emphasis (SPICE) model of a two-level microbolometer based on negative-temperature-coefficient thin films, such as vanadium oxide or amorphous silicon. The proposed modeling begins from the electric-thermal analogy and is realized on the SPICE modeling environment. The model consists of parametric components whose parameters are material properties and physical dimensions, and can be used for the fast design study, as well as for the co-design with the readout integrated circuit. The developed model was verified by comparing the obtained results with those from finite element method simulations for three design cases. The thermal conductance and the thermal capacity, key performance parameters of a microbolometer, showed the average difference of only 4.77% and 8.65%, respectively.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.14 no.2
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• pp.43-45
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• 2000

In this study, present a method for extracting the BJT 1/f noise model parameters fabricated by BICMOS process. From the geometric analysis of the Kf, we show that Kf is in inverse proportion to emitter area. And it is extracting that $K=0.8\times10_{-20}, A_f=2, \alpha=1$ values.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.28 no.3
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• pp.154-159
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• 2015

In this paper, we propose a numerical method to model temperature dependent threshold voltage shift observed in metal oxide thin-film transistors (TFTs). The proposed model is then implemented in AIM-SPICE circuit simulation tool. The proposed method consists of modeling the well-known stretched-exponential time dependent threshold voltage shift and their temperature dependent coefficients. The outputs from AIM-SPICE tool and the stretched-exponential model at different temperatures in the literature are compared and they show a good agreement. Since metal oxide TFTs are the promising candidate for flat panel displays, the proposed method will be a good stepping stone to help enhance reliability of fast-evolving display circuits.

• Journal of the Institute of Electronics and Information Engineers
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• v.49 no.12
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• pp.173-178
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• 2012

Using accurate MOSFET substrate parameters obtained by a RF direct extraction method, it is demonstrated that a BSIM4 model with only substrate resistances is not physically valid to apply in the wide range of gate length because of scaling inaccuracy. In order to remove the unphysical problem of the BSIM4, a modified BSIM4 model with additional dielectric substrate capacitance is used and its physical validity is verified by observing excellent gate length scalability.

• Journal of Sensor Science and Technology
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• v.21 no.5
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• pp.389-393
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• 2012

A chaotic oscillator with light controllability was designed. The proposed chaotic oscillator consists of a photo sensor, two phase clock driven MOS switches, nonlinear function blocks for chaotic signal generation. SPICE circuit analysis using a 0.35 um CMOS process parameters was performed for its chaotic dynamics. And we confirmed that chaotic behaviors of the circuit can be controlled according to light intensity. By SPICE simulation, chaotic dynamics by time waveforms, frequency analysis was analyzed. SPICE results showed that proposed circuit can make various light-controlled chaotic signals.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.18 no.4
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• pp.8-14
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• 2004

In this paper, We designed the electronic ballast power factor corrected(PFC) circuity for an 400[W] hight pressure soldium lamp using boost-converter. The values of PFC elements in the proposed boost-converter circuit are calculated theoretically and performed simulation using IsSPICE. We also implemented the ballast for high pressure sodium lamp and experiments. We found that the experimental characteristics of implemented PFC circuit were same with those of simulation results. The experimental results show the performance as PF 90.3[%] at output 400(W).

• Journal of Sensor Science and Technology
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• v.10 no.2
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• pp.142-147
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• 2001

Using transmission-line equivalent circuit based on cross-field model for an interdigital acoustic wave transducer, an efficient simulation technique of SAW filters by SPICE is proposed. Propagation of surface acoustic wave is modeled as transmission line so that frequency-dependent circuit elements are not needed in the equivalent circuit of an interdigital transducer. Because the equivalent circuits for frequency-dependent circuit elements are not derived approximately, and a small number of circuit elements are used in the equivalent circuit for filters, simulation time is much reduced. The utility of the proposed technique is demonstrated through simulation for the characteristics of SAW filters such as insertion loss, input admittance, passband ripple, and harmonic frequency response.

• Journal of the Korean Institute of Telematics and Electronics A
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• v.31A no.1
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• pp.39-47
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• 1994

The drain current reduction effect due to the side-gating phenomena resulted from interaction between the neighbor gates is lead to degradation of circuit performance. In this paper, these effect were modelized for circuit simulation with the shift of threshold voltage resulting from negative charge formation and the analysis of substrate leakage current resulting trapping effect. To remove dificiencies of the conventional three terminal structure, these model were implemented in SPICE with the four terminal structure, and then the constructed environment enables the simulation of circuit performance degradation resulted from side-gating effect. The validity of implemented model is proved by comparisoin with experiment data.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.25 no.9
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• pp.686-691
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• 2012

In this paper, we designed a Chua's chaotic circuit using transcondcutor based nonlinear resistor. Proposed chaotic circuit consist of L, C, R and transcondcutor based Chua's diode. We performed SPICE simulation for chaotic dynamics such as time seriesform, frequency analysis and phase plane of the circuit. Chaotic dynamics of the circuit was analysed according to MOS size variation of the operational transconductance amplifier. Also, we performed SPICE circuit analysis for temperature dependance of the circuit. SPICE results showed that chaotic dynamics of the circuit varied according to the temperature variation and chaotic signals were generated in specific temperature conditions.

• Korean journal of food and cookery science
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• v.13 no.5
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• pp.669-673
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• 1997

The masking effect of Chamnamul (Pimpinella brachycarpa) on meaty and fishy flavor was measured by sensory evaluation to investigate the usefulness of Chamnamul as a natural spice or herb. Shady air dried Chamnamul was utilized for sensory analysis. By the use of Chamnamul, the meaty flavor was significantly reduced in beef and pork. Chamnamul also showed a similar effect as black pepper on reducing meaty flavor. The use of Chamnamul also significantly reduced the fishy flavor of anchovy soup. When Chamnamul was added to rice gruel, rice odor was reduced but grassy odor remained strong.