Zobrazeno 1 - 10 of 21 pro vyhledávání: '"Ha-Chul Kim"'
2
A 145μW, 87dB SNR, Low Power 3rd order Sigma-Delta Modulator with Op-amp Sharing
Autor: Ha-Chul Kim, Seong-Ik Cho, Jae-Bung Kim
Publikováno v: Journal of IKEEE. 19:87-93
In this paper, a , 87dB SNR, Low power 3rd order Sigma-Delta Modulator with Op-amp sharing is proposed. Conventional architecture with analog path and digital path is improved by adding a delayed feed -forward path for disadvantages that coefficient
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ba8cc26dfe43684836f2376723a93c80
https://doi.org/10.7471/ikeee.2015.19.1.087
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3
A Nuclear Event Detectors Fabrication and Verification for Detection of a Transient Radiation
Autor: Seong-Ik Cho, Sang-Hun Jeong, Ha-Chul Kim, Seung-Min Lee, Nam-Ho Lee
Publikováno v: The Transactions of The Korean Institute of Electrical Engineers. 62:639-642
In this paper, proposed NED(nuclear event detectors) for detection of a transient radiation. Nuclear event detector was blocked of power temporary for defence of critical damage at a electric device when a induced transient radiation. Conventional NE
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::290026cebe2b416bc16c1e38a4579175
https://doi.org/10.5370/kiee.2013.62.5.639
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4
A band-rejection type RF switch based on a dual-mode microstrip ring resonator
Autor: Hyun-Chul Choi, Yeon Kwan Moon, Jae Jong Ryu, Ha Chul Kim, Wu Seong Lee, Ju Gab Lee
Publikováno v: Microwave and Optical Technology Letters. 52:947-950
A band-rejection type RF switch, which has very high off-state isolation, low on-state insertion loss, and adjustable bandwidth, is proposed using a dual-mode ring resonator and two PIN diodes. To enable sharp band stop and dual-mode transmission, th
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5b62839e6c505eaad12230b8b3f0f961
https://doi.org/10.1002/mop.25080
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5
Compact semilumped elliptic-function low-pass filter using microstrip meander line
Autor: Joong Ho Jang, Hyun-Chul Choi, Ju Gab Lee, Jae Jong Ryu, Yeon Kwan Moon, Wu Seong Lee, Ha Chul Kim
Publikováno v: Microwave and Optical Technology Letters. 49:1777-1779
For the size reduction and sharp attenuation of the low-pass filter in lower RF frequency range, a semilumped elliptic-function low-pass filter was proposed using microstrip meander line, chip capacitor, and radial stubs. To estimate more accurate in
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9b5c5bc0eb69109d1942e3bf3e904dc9
https://doi.org/10.1002/mop.22545
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6
Compact semilumped bandstop resonators using the capacitively loaded parallel-coupled microstrip line
Autor: Wu Seong Lee, Ha Chul Kim, Hyun-Chul Choi, Jae Jong Ryu, Yeon Kwan Moon, Ju Gab Lee, Joong Ho Jang
Publikováno v: Microwave and Optical Technology Letters. 49:367-369
Compact semilumped bandstop resonators are simply designed using parallel-coupled microstrip line and lumped capacitors. The lumped capacitors loaded in between coupled lines increase the odd mode electrical length, and the frequency of transmission
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ee7cf466f2810e616eafb7292f27aa75
https://doi.org/10.1002/mop.22135
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7
Electron beam effects on polymers: V. Symmetric and asymmetric materials based on the controlled distribution of bis-GMA into crosslinked nitrile rubber films prior to curing by electron beam radiation
Autor: Ha-Chul Kim, Garth L. Wilkes, Abdel Wahab M. El-Naggar
Publikováno v: Journal of Applied Polymer Science. 42:1107-1119
Two systems based on the controlled distribution of the methacrylic acid derivative of the diglycidyl ether of bisphenol-A (bis-GMA) into crosslinked acrylonitrile–butadiene co-polymers, commonly called nitrile rubber (NBR), were prepared utilizing
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7b06c69fd7dccbed40daff3de11a7eec
https://doi.org/10.1002/app.1991.070420424
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9
Conference
A band-stop RF switch using a dual-mode stepped-impedance microstrip ring resonator.
Autor: Wu Seong Lee, Gi Moon Lee, Byung Chang Choi, Ha Chul Kim, Hyun Chul Choi
Publikováno v: Microwave Conference (EuMC), 2010 European; 2010, p316-319, 4p
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10
Akademický článek
A band-rejection type RF switch based on a dual-mode microstrip ring resonator.
Autor: Wu Seong Lee, Jae Jong Ryu, Yeon Kwan Moon, Ju Gab Lee, Ha Chul Kim, Hyun Chul Choi
Publikováno v: Microwave & Optical Technology Letters; Apr2010, Vol. 52 Issue 4, p947-950, 4p, 1 Black and White Photograph, 3 Diagrams, 1 Chart, 4 Graphs
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