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Switched-Capacitor Variable Gain Amplifier with Operational Amplifier Preset Technique
조영균,Young-Deuk Jeon,Jong-Kee Kwon 한국전자통신연구원 2009 ETRI Journal Vol.31 No.2
We present a novel operational amplifier preset technique for a switched-capacitor circuit to reduce the acquisition time by improving the slewing. The acquisition time of a variable gain amplifier (VGA) using the proposed technique is reduced by 30% compared with a conventional one; therefore, the power consumption of the VGA is decreased. For additional power reduction, a programmable capacitor array scheme is used in the VGA. In the 0.13 μm CMOS process, the VGA, which consists of three-stages, occupies 0.33 mm2 and dissipates 19.2 mW at 60 MHz with a supply voltage of 1.2 V. The gain range is 36.03 dB, which is controlled by a 10-bit control word with a gain error of ±0.68 LSB.
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CFO의 전략가 역할, TMT 관계의 질, 제품․생산․관리 혁신활동 간의 구조적 관계
조영균,김언수 대한경영학회 2022 大韓經營學會誌 Vol.35 No.2
In the strategic management field, research on the top management team (TMT) has mainly focused on CEOs. As such, research on CFOs, whose strategic roles are expanding recently, has been scarce. This study is a quantitative study of exploratory nature that empirically analyzes how the CFO's strategic role affects a firm's innovation activities and whether the TMT relationship quality mediates between the two. In this study, by referring to various innovation types in strategic management and the OECD's innovation classification, a firm's innovation activities are divided into product (service) innovation, operation (process) innovation, and management innovation. A survey is conducted on incumbent CFOs of 102 Korean firms selected based on three criteria: annual sales volume, listing on the KOSPI and KOSDAQ markets, and membership in the top 20 groups. After an exploratory factor analysis using SPSS 26, PLS-SEM(used partial least square structural equation modeling) analysis using SmartPLS 3.3.5 is performed. As a result of the empirical study, it is found that when CFOs expand their role to that of strategist, it has a positive effect on firms' product, operation, and management innovation activities as well as the TMT relationship quality. The TMT relationship quality has a positive effect on product and management innovation activities, but has a limited effect on the operation innovation activities. Also, the TMT relationship quality is found to mediate between the CFO's strategic role and product and management innovation activities, but not operation innovation activities. The findings suggest that the role of CFO as strategist interacts with the firm's various innovation activities, CFOs can support and promote optimal resource allocation in each of the product, operation, and management innovation activities, and that TMT members can promote innovation activities by collaborating from a firm-wide perspective. But operation innovation activities seem inherently functional in nature rather than strategic. 전략경영 분야에서 최고경영진(TMT)에 대한 연구를 할 때 그 대상은 CEO에 주로 집중했다. 따라서, 최근전략적 역할이 확대되고 있는 CFO에 대한 연구는 부족하다. 본 연구는 CFO가 그 수행하는 역할을 전략가로확대할 때 기업의 혁신활동에 어떤 영향을 미치는지, 또 이를 TMT 관계의 질이 매개하는지 그 구조적 관계를실증분석하고 설명하는데 목적이 있으며, 탐색적 성격의 양적연구이다. 본 연구에서는 전략경영에서의 다양한 혁신 유형과 OECD의 혁신 분류를 참조하여 기업의 혁신활동을제품(서비스) 혁신활동, 생산 혁신활동, 관리 혁신활동으로 구분하였다. 외부감사인의 감사를 받고 있는 1700여기업 중에서 연매출 규모, 유가증권시장과 코스닥시장 상장 여부, 20대그룹 소속 여부의 3가지 기준을 적용하여선정된 102개 기업의 현직 CFO를 대상으로 설문조사를 실시하였으며, SPSS 26을 이용하여 탐색적 요인분석후 SmartPLS 3.3.5를 이용 구조방정식모델링(PLS-SEM)하여 분석하였다. 실증연구 결과 CFO가 전략가 역할을 하는 경우, 기업의 제품·생산·관리 혁신활동 및 TMT 관계의 질에긍정적인 영향을 미치는 것으로 나타났다. TMT 관계의 질은 제품과 관리 혁신활동에는 긍정적인 영향을미치나, 생산 혁신활동에는 영향이 제한적인 것으로 나타났다. 또, TMT 관계의 질은 CFO의 전략가 역할과제품 및 관리 혁신활동 사이에서는 매개역할을 하나, CFO의 전략가 역할과 생산 혁신활동 사이에서는매개역할을 하지 않는 것으로 나타났다. 본 연구의 결과는 CFO의 전략가 역할이 기업의 다양한 혁신활동과 상호작용하며, CFO가 제품·생산·관리혁신활동 각각에서 최적의 자원배분과 혁신활동 자체를 지원하고 촉진할 수 있으며, TMT 구성원들이 전사적관점에서 협력함으로써 혁신활동을 촉진할 수 있음을 시사한다. 그러나 생산 혁신활동은 본질적으로 기능적특성이 강하여 당해 기능담당 TMT와 조직의 역할이 더 중요함을 시사한다.
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조영균,Cho, Young-Kyun Convergence Society for SMB 2021 융합정보논문지 Vol.11 No.7
A novel selective oxidation process has been developed for low source/drain (S/D) series resistance of the fin channel metal oxide semiconductor field effect transistor (MOSFET). Using this technique, the selective oxidation fin-channel MOSFET (SoxFET) has the gate-all-around structure and gradually enhanced S/D extension regions. The SoxFET demonstrated over 70% reduction in S/D series resistance compared to the control device. Moreover, it was found that the SoxFET behaved better in performance, not only a higher drive current but also higher transconductances with suppressing subthreshold swing and drain induced barrier lowering (DIBL) characteristics, than the control device. The saturation current, threshold voltage, peak linear transconductance, peak saturation transconductance, subthreshold swing, and DIBL for the fabricated SoxFET are 305 ㎂/㎛, 0.33 V, 13.5 𝜇S, 76.4 𝜇S, 78 mV/dec, and 62 mV/V, respectively.
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조영균,정윤하 한국전자통신연구원 2004 ETRI Journal Vol.26 No.6
To improve the operation error caused by the thermal fluctuation of electrons, we propose a novel singleelectron pass-transistor logic circuit employing a multipletunnel junction (MTJ) scheme and modulate a parameters of an MTJ single-electron tunneling device (SETD) such as the number of tunnel junctions, tunnel resistance, and voltage gain. The operation of a 3-MTJ inverter circuit is simulated at 15 K with parameters Cg=CT=Cclk=1 aF, RT=5 MΩ, Vclk=40 mV, and Vin=20 mV. Using the SETD/MOSFET hybrid circuit, the charge state output of the proposed MTJ-SETD logic is successfully translated to the voltage state logic.
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