Chang-Wan Kim

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An ultra-wideband (UWB) CMOS low noise amplifier (LNA) topology that combines a narrowband LNA with a resistive shunt-feedback is proposed. The resistive shunt-feedback provides wideband input matching with small noise figure (NF) degradation by reducing the Q-factor of the narrowband LNA input and flattens the passband gain. The proposed UWB amplifier is(More)
PURPOSE The purpose of this study was to evaluate change in meniscal allograft extrusion during the first year after meniscus allograft transplantation (MAT) by use of serial magnetic resonance imaging (MRI). METHODS Twenty-three consecutive patients who underwent MAT between June 2002 and March 2006 with total or subtotal meniscectomy of the knee were(More)
PURPOSE The purpose of this study was to examine the clinical features and diagnosis of patients with mucoid hypertrophy of the anterior cruciate ligament (ACL) and to assess the results of arthroscopic treatment. METHODS Between May 1999 and August 2005, 156 knees in 132 patients were diagnosed with mucoid hypertrophy of the ACL and underwent(More)
BACKGROUND Although numerous studies have reported outcomes of meniscus allograft transplantation, only a few dealt with isolated procedures or employed objective evaluation methods. HYPOTHESIS Isolated lateral meniscus allograft transplantation (LMAT) provides clinical improvements and favorable objective results in symptomatic lateral meniscus-deficient(More)
PURPOSE To determine the clinical results of arthroscopic medial meniscectomy in patients with Outerbridge grade IV osteoarthritis who underwent an arthroscopic medial meniscectomy. METHODS From March 1998 to December 2001, 617 patients underwent arthroscopic medial meniscectomy; 68 patients had Outerbridge grade IV osteoarthritis and were examined in(More)
The objective of this article was to evaluate the effect of the change of posterior condylar offset to range of motion (ROM) and clinical results after computer-assisted cruciate-retaining mobile-bearing total knee arthroplasty (TKA). A total of 111 knees underwent cruciate-retaining mobile-bearing TKAs under computer-assisted navigation from January 2005(More)
Graphene has received significant attention due to its excellent mechanical properties, which has resulted in the emergence of graphene-based nano-electro-mechanical system such as nanoresonators. The nonlinear vibration of a graphene resonator and its application to mass sensing (based on nonlinear oscillation) have been poorly studied, although a graphene(More)
A wide-tuning monolithic LC-tuned VCO is presented. The proposed VCO accomplishes wide tuning by utilizing binary weighted switched varactor combinations operating at minimum or maximum value, in addition to a linearly varying interpolation varactor. Measurements show 74% of tuning at a range of 1.56–2.71 GHz, with the phase noise ranging from 136 dBc/Hz to(More)