Wing-Shan Tam

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This paper proposes a double edge-triggered half­ static clock-gated D-type flip-flop (DHSCGFF), which consists of two parallel dynamic master latches connected in parallel and a single half-static latch with clock-gating circuit. The proposed DHSCGFF makes use of a clock-gating circuit to achieve better race tolerance, circuit compactness and energy(More)
A modification of the new edge-directed interpolation method is presented. The modification eliminates the prediction error accumulation problem with adopting a modified training window structure, and further extends the covariance matching into multiple directions for suppressing the covariance mis-match problem. Simulation results show that the proposed(More)
Temperature-dependent light-emitting and current–voltage characteristics of multiple-quantum well (MQW) InGaN/GaN blue LEDs were measured for temperature ranging from 100 to 500 K. The measurement results revealed two kinds of defects that have pronounced impact on the electroluminescent (EL) intensity and device reliability of the LEDs. At low-temperature(More)
0026-2714/$ see front matter 2011 Elsevier Ltd. A doi:10.1016/j.microrel.2011.09.031 ⇑ Corresponding author. E-mail address: oi_ying1009@yahoo.com.hk (O.Y. Flash memories are now widely used in many portable electronic devices, in embedded systems and are even as replacement for computer hard disks. In flash memory systems, high-voltages (up to about 10 V)(More)
This paper focuses on interpreting low resolution computed tomography (CT) scan medical images using interpolation functions. Image processing operations such as zooming and segmentation are very commonly performed on these images in medical sciences. However, it is very challenging to perform such operations because of poor resolution of these images. Over(More)
This review highlights various design and realization aspects of three commonly used charge pump topologies, namely, the linear, exponential, and the Fibonacci type of charge pumps. We shall outline the new methods developed recently for analyzing the steady and dynamic performances of these circuits. Some practical issues for the CMOS implementation of(More)