This paper proposes a new programmable RF Built-In Self-Test (BIST)

This paper presents a high gain and low power 24-GHz power amplifier (PA) for the short range automotive radar. The proposed circuit is implemented using TSMC 0.13-µm RF CMOS (f T /f max =120/140 GHz) technology, and it is powered by a 1.5-V supply. To improve power gain of the amplifier, it has a 2-stage cascode scheme. This circuit uses transmission lines to reduce total chip size instead of real bulky inductors for input and output impedance matching. The layout techniques for RF (radio frequency) are used to reduce parasitic capacitances at the band of 24 GHz. The proposed RF amplifier has low cost and low power dissipation since it is realized using all CMOS processes. The proposed circuit showed the smallest chip size of 0.12 mm 2 , the lowest power dissipation of 44.3 mW and the highest power gain of 24.04 dB as compared to recently reported research results.

The technique of magnetic resonance force microscopy (MRFM) is proposed with the purpose to enhance the sensitivity of the inductively detected conventional magnetic resonance technique. The IBM MRFM group demonstrated magnetic resonance imaging (MRI) to the nanoscale level by using MRFM. The spatial resolution of the inductive method is on the order of a few micrometers. In this paper, we introduce an MRFM probe equipped with a charge coupled device (CCD) camera. We show that this CCD camera is very helpful to correct the optical fiber-to-cantilever and magnet-to-sample alignments which can be the determinant of success or failure in an MRFM experiment. Also, this camera enables us to monitor an experimental setup inside a vacuum chamber of P = 10(-5) mbar in real-time. Then, we verified the usefulness of the CCD camera through an electron spin resonance experiment on a diphenylpicrylhydrazyl (DPPH) sample. We also discuss the extensibility of the CCD camera for low temperature experiments, creating an atmosphere in which MRFM can flourish truly to its full potential in the field of nanotechnology.

Abstract:In this paper, we present optimization technique for the response time of DVR (Dynamic Voltage Restorer) and the possible compensation range of voltage dip by the DVR system. To protect 3-phase phase-controlled rectifier from voltage dip, DVR system needs to have optimum response time as an important design factor. Although the fast response time of DVR ensures wider range of voltage dip, DVR controller has so high cost and poor stability. This paper proposes DVR system with optimum response time required for certain intensity of voltage dips and good stability to support possible compensation range of voltage dip. Proposed technique showed optimum response time and good stability for overall system. We believe that proposed technique is reliable and useful in DVR design. Keywords

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