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CMOS 2-port Active Inductor using LC Resonance Circuit
구자건,정용채 한국과학기술원 반도체설계교육센터 2016 IDEC Journal of Integrated Circuits and Systems Vol.2 No.2
This paper presents a novel 2-port high-Q active inductor using LC parallel resonator. The proposed 2-port high-Q active inductor consists of the feedback parallel resonance circuits that comprise of low-Q spiral inductor and capacitor. The novelty of the proposed structure can improve its Q-factor decreased by the parasitic capacitance and extend high-Q operating frequency range. For experimental validation, the 2-port active inductor was fabricated with 65 nm Samsung CMOS technology. The fabricated circuit shows inductance of above 2nH and Q-factor higher than 35 for frequency range of 3 ~ 10 GHz.
CMOS 65nm Active 2-port Inductor using tunable feedback resistance
구자건,정용채 한국과학기술원 반도체설계교육센터 2017 IDEC Journal of Integrated Circuits and Systems Vol.3 No.4
In this paper, a novel CMOS high Q-factor active 2-port inductor with feedback resistor has been proposed, mathematically analyzed and fabricated. The proposed circuit topology can improve its equivalent inductance range and Q-factor. The proposed active 2-port inductor was implemented by 65 nm Samsung RF CMOS technology, which demonstrates a maximum quality-factor of 600 with 3 nH inductance. The fabricated circuit occupies 200 um x 300 um chip size and has high Q-factor and inductance over wide operating frequency range as compared to the conventional active 2-port inductor circuits. In addition, the inductance variation is very small in wide operating frequency range.
구자건 한국수자원학회 2004 물과 미래(한국수자원학회지) Vol.37 No.4
삼보일배와 새만금사업ㆍㆍㆍ. 이처럼 우리 사회가 안고 있는 사회적 이유를 상징적으로 보여준 사건이 있었을까. 새만금사업을 반대하며 전라북도 부안의 해창 갯벌에서 서울시청 앞까지 세 걸음 걷고 한 번 절하는 삼보일배 행진이 언론의 주목을 받은 지도 일년이 지났다. 그러나 우리 사회의 상황은 그 때와 크게 다르지 않은 것 같다.(중략)