| | | 20,000+ Fresh Resumes Monthly | |
|
|
| |
Click here or scroll down to respond to this candidateCandidate's Name ), Ph.D.Cedar Rapids, IA Street Address PHONE NUMBER AVAILABLE EMAIL AVAILABLE GiHyon (Candidate's Name LinkedInSKILLS As a design engineering manager in Qorvo, Avago & now Skyworks has a full responsibility, including review of all semiconductor chips design to meet the customer specifications, assembly site build-related technical issue follow-up, internal qualification reliability issue resolving, product test items decision not to hurt production test yield, customer side qualification related technical issue follow-up and so on. GaAs HBT based PA design, including technology selection, power array design, bias circuit design considering driver & power stage nonlinearity, thermal coupling characteristics especially burst mode EVM, harmonic load tuning, muti-section matching with low loss & wide band simultaneously, Doherty architecture with peak & main asymmetric power dividing/combining network for optimum efficiency at backoff Pout, sensitivity analysis to generate optimum design variants. BAW filter design, including multiple CA combination environment, Tx-Rx leakage/isolation trade off with in-band IL, considering SMD inductor coupling with nearby components. RF CMOS Active-RC filter design with 60dB dynamic gain range, adoptive tunability in channel environment, automatic tuning circuit for the process variation by using TDC (Time to Digital Converter) mm-wave GaAs PHEMT based wideband balanced power amplifier design by using novel 3-dB coupler.CAREER EXPERIENCESr. Manager, Skyworks Solutions Inc., Cedar Rapids, IA Apr 2024 Present Development of HB Tx DSM, including LTE MB/HB GaAs HBT PA, LNA, ASM with multiband BAW DPX as a MCM Team manager, targeting top tier smart phone design win.Sr. Principal Design Engineer, OSNT Ltd., Santa Ana, CA Oct 2022 Feb 2024 Development of LB L-PAMiD module, including GSM & LTE PA, DPX and LNA with Antenna Switch Module as a III-V IC Design Team Lead, in charge of GSM PA design for high efficiency in multiple power modes.Principal Design Engineer, iCana Inc., San Diego, CA June 2021 Oct 2022 Development of 5G sub6G small cell FEM, including PA, LNA with Antenna Switch Module as a III-V IC Design Team Lead, in charge of N77, N78, N79 PA design with Doherty architecture for high efficiency.Principal Design Engineer, Lynnian Inc., Lake Forest, CA May 2018 May 2021 Development of WiFi PA for router & cell phone as a design engineer in 2.4G PA chip design, targeting Qualcomm WiFi transceiver reference board design-win. Started the sampling for Samsung Galaxy A-series model with low cost.Design Engineering Manager, Qorvo Inc., Seoul, Korea May 2013 Mar 2018 Development of High Band L-PAMiD with special function of B7_B40 DLCA & B40_B41 DLCA, working as a Rx-side design leader, while Tx-side are done by Greensboro Design Center, design-win in Samsung Galaxy A-series model. Development of High Band L-PAMiD, which is including B7, B40 & B41 PA+ DPX with LNA, worked as a FDD side design leader, while TDD side was done by Greensboro Design Center, design-win in Samsung Galaxy S8 European model. Development of B30 Single Band PA + DPX module as a project team lead, design-win in Samsung Galaxy S7 North America model. Development of High Band MMPA module as a project team lead, first project done by Korea design center independently, targeted Samsung Galaxy Note series. Development of Low-Mid Band MMPA with Qualcomm ET support, as a LB main design engineer.Principal Research Engineer, Avago (now Broadcom), Seoul, Korea Apr. 2007 Apr. 2013 Development of Multi-Band Multi-Mode Power Amplifier with Envelope Tracking and 2G, 3G, 4G Mode Support (Project Team Leader), which was world first ET MMPA, design-win in Samsung Galaxy Note. Development of Linear Quad-Band GSM/EDGE Power Amplifier as the primary supplier of Qualcomm MSM8600 series reference design (Development Team Leader) about 40M units shipped to RIM, HTC, Nokia, Motorola, LG, etc.Chief Research Engineer, LG Electronics, Seoul, Korea Aug. 2000 Mar. 2007 Baseband Analog VGA and Filter Design for DTV terrestrial and cable multi-standard tuner by using TSMC 0.18um RF CMOS technology. VBIC Modeling of GaAs HBT Power Array & scalable bias circuit device using Agilent-ADS & IC-CAP CDMA Smart Power Amplifier Design, including optimum power array designEDUCATIONPh. D. (Elecrical Engineering), Seoul National University, Seoul, Korea Mar. 1995 Aug. 2000Dissertation : Air-Gap Stacked Structures and Their Applications to GaAs P-HEMT MMICsoTable-based Large Signal Modeling of GaAs pHEMToDesign of Novel Air-Gap-Stacked Metal StructuresoUltra-wideband balanced amplifier using AGS 3-dB couplers.oSmall size Ka-Band power amplifier using AGS Low impedance line.oPhase noise reduced Ka-Band oscillator using AGS resonator.M.S. (Electrical Engineering), Seoul National University, Seoul, Korea Mar. 1993 Feb. 1995Thesis : Design and Fabrication of VCO MMIC for Mobile CommunicationPATENTS[1] An air-gap stacked Microstrip 3dB coupler for MMIC and fabricating method thereof, KRPHONE NUMBER AVAILABLE, Dec. 2002[2] Microstrip transmission line using air-gap stacked structure and monolithic microwave integrated circuit device having the microstrip transmission line. KRPHONE NUMBER AVAILABLE, Mar. 2003[3] Inter-Stage Matching Circuit of Multi-Stage PowerAmplifier for Mobile Communication, KRPHONE NUMBER AVAILABLE, Mar 2005[4] Smart Power Amplifier for Mobile Communication, KRPHONE NUMBER AVAILABLE, Nov. 2006[5] Automatic tuning circuit for RC filter, KRPHONE NUMBER AVAILABLE, Sep. 2007PUBLICATIONS- International Journal[1]Gi-Hyon Ryu, Dae-Hyun Kim, Jae-Hak Lee, and Kwang-Seok Seo, "A Novel 3 dB Coupler for MMIC Using Air-Gap Stacked Microstrip Lines, ", IEEE Microwave and Guided Wave Letts.,pp. 1-3, Jan. 2000[2] Sung-Gi Yang, Gi-Hyon Ryu and Kwang-Seok Seo, "11dB-gain and 50GHz-bandwidth coplanar distributed amplifier IC based on 0.25 non-recessed self-aligned gate GaAs P-HEMT," IEE Electron. Letts., pp. 1943-1945, Oct. 1999[3] Yong-Joon Jeon, Hyung-Wook Kim, Hong-Teuk Kim, Gi-Hyon Ryu, Ji-Youn Choi, K. Kim, Soo-Earn Sung and Byungdu Oh, A highly efficient CDMA power amplifier based on parallel amplification architecture, IEEE Microwave and Wireless Components Letts.,pp. 401-403, Sep. 2004- International Conference[1] Gi-Hyon Ryu and Kwang-Seok Seo, "Graphical Design Method of Air-Gap Stacked Marchand Balun.", IEEE MTT-S, 2001 International Microwave Symposium.[2] Gi-Hyon Ryu, Dae-Hyun Kim, Jae-Hak Lee and Kwang-Seok Seo, "A Novel Low Impedance Line for MMIC Using Air-Gap Stacked Structure.", IEEE MTT-S, 2000 International Microwave Symposium.[3] YounKyu Chung, Gi-Hyon Ryu, Dae-Hyun Kim, Jae-Hak Lee, Woo-Yeon Hong, and Kwang-Seok Seo, "Characterization of source-to-drain capacitance(Cds) effect of GaAs PHEMT for microwave and millimeter-wave switch," IEEE MTT-S, 2000 International Microwave Symposium.[4] Hong-Teuk Kim, Ki-Hong Lee, Hyung-Kyu Choi, Ji-Youn Choi, Kyung-Hak Lee, Jin-Pil Kim, Gi-Hyon Ryu, Yong-Joon Jeon, Choong-Soo Han, Keechul Kim and Kyungho Lee, "High efficiency and linear dual chain power amplifier without/with automatic bias current control for CDMA handset applications," European Microwave Conference, pp. 337-340, 2004[5] D-H. Kim, S-G. Yang, G-H. Ryu, and K-S. Seo, "A New FET Extrinsic Parameter Extraction Method at Pinch-off Bias Utilizing Gate-Width Scaling Property," Proceedings of GaAs 98, pp. 395-400, Armsterdam, Oct. 1998.[6] Sung-Gi Yang, Gi-Hyon Ryu, and Kwang-Seok Seo, "Fully Symmerical, Differential-Pair Type Floating Active Inductors," IEEE ISCAS-'97 pp. 93-96, 1997.[7] J.S. Kim, C.H. Park, G.H. Ryu, K.Seo, "F-Inductor and BC-MOS Technology for Monolithic Silicon RF IC's," IEEE Radio Frequency Integrated Circuits Symposium, pp165-168, 1998- Domestic Journal : 3 papers[1] Gi-Hyon Ryu, Sung-Gi Yang, Kwang-Seok Seo "A coplanar wideband balanced amplifier MMIC using novel air-gap stacked 3-dB couplers," Journal of the Korean Physical Society, 2000. 12[2] Gi-Hyon Ryu, Dae-Hyun Kim, Jae-Hak Lee, Kwang-Seok Seo, "A Novel Air-Gap Stacked Microstrip 3dB Coupler for MMIC, " Journal of Korean Institute of Electromagnetic Engineering and Science, Vol.10 (5) pp.688-693 Sep,1999.[3] Hyun-Il Kang, Jae-Eung Oh, Gi-Hyon Ryu, Kwang-Seok Seo, " GaAs MMIC VCO/Mixer for PCS Applications," Institute of Electronics Engineers of Korea, Vol.35 (5), pp1-10, 1998- Domestic Conference : 5 papers[1] Dae-Hyun Kim, Sung-Gi Yang, Gi-Hyon Ryu, Kwang-Seok Seo, " A New Extrinsic Parameter Extraction Method for HEMT Utilizing Gate-width Scaling Property at Pinch-off Bias," 1998, Conference of Korean Institute of Electromagnetic Engineering and Science, pp. PHONE NUMBER AVAILABLE[2] Hyun-Il Kang, Gi-Hyon Ryu, Jae-Eung Oh, Kwang-Seok Seo, " GaAs MMIC VCO/Mixer for PCS Applications," Korean Conference on Semiconductors, pp. PHONE NUMBER AVAILABLE[3] Gi-Hyon Ryu, Kwang-Seok Seo, "Design and Characterization of VCO MMIC for Mobile Communicaion," Korean Conference on Semiconductors, pp. PHONE NUMBER AVAILABLE[4] Gi-Hyon Ryu, Kwang-Seok Seo, " Design and Characterization of Active Inductor MMIC for Mobile communication," Korean Conference on Semiconductors, ppPHONE NUMBER AVAILABLE[5] Gi-Hyon Ryu, Kwang-Seok Seo, " Design and Characterization of VCO MMIC for Mobile communication," Conference of Institute of Electronics Engineers of Korea, pp. 1014-1017, 1994.TECHNICAL SKILLS1.Circuit SimulatorADS, AWR, Cadence Virtuoso, SPICE2.EM SimulatorHFSS, ADS-FEM3.Large Signal Device Model Extracting ToolsADS, IC-CAP4. Measurement InstrumentsMaury Load Pull System, HP8510 Network Analyzer, HP 4142, 4145 Parameter analyzerSpectrum analyzer, Signal source, On-wafer Probe Station, etc.5. Computer SkillWord Processor : MS Excel & MS-PowerPoint automation with VBALanguage : C & C++, Excel-VBA, Python, AEL, Matlab, Labview, VEE etc.SCHOLARSHIPS and AWARDSAcademic Achievement Scholarship, Oh-woon Scholarship Foundation. (1991-1994)Academic Achievement Scholarship, Seoul National University (1993-1996)Educational-Industrial Complex Scholarship, Samsung Electronics Corp. (1995 2000)Samsung HumanTech Student Paper Contest, Feb.2000. Bronze Medal |
