Current Issue : October - December Volume : 2017 Issue Number : 4 Articles : 5 Articles
This is Part II of a two-part paper that explores the 28-nm UTBB FD-SOI\nCMOS and the 22-nm Tri-Gate FinFET technology as the better alternatives\nto bulk transistors especially when the transistor�s architecture is going fully\ndepleted and its size is becoming much smaller, 28-nm and above. Reliability\ntests of those alternatives are first discussed. Then, a comparison is made between\nthe two alternative transistors comparing their physical properties, electrical\nproperties, and their preferences in different applications....
A novel concept of drain current modelling in rectangular normal MOS transistors with\nthe Lorentz force has been proposed for the first time. The single-drain MOS transistor is qualified\nas a magnetic sensor. To create the Lorentz force, a DC loop current is applied through an on-chip\nmetal loop around the device, and the relation between the applied loop current and the created\nmagnetic field is assumed to be linear in nature. The drain current of the MOS transistor is reduced\nwith the applied Lorentz force from both directions. This change in the drain current is ascribed\nto a change in mobility in the strong inversion region, and a change in mobility of around 4.45% is\nobserved. To model this change, a set of novel drain current equations, under the Lorentz force, for\nthe strong inversion region has been proposed. A satisfactory agreement of an average error of less\nthan 2% between the measured and the calculated drain currents under the magnetic field created by\nan on-chip metal loop is achieved....
In this paper, a soft-switching single-ended-primary-inductance converter (SEPIC) with\nmulti-output sources is proposed. The proposed SEPIC has the following advantages: (1) The\nconversion efficiency can be increased. To incorporate a soft-switching cell with a flyback-type,\nthe power switches can achieve zero-voltage-switching (ZVS) and zero-current-switching (ZCS)\nfeatures under turn-on transitions, resulting in reducing the switching losses and electromagnetic\ninterference (EMI); (2) The applicability can be maximized. To apply the voltage ratio of the\ntransformers, the proposed SEPIC has multi-output sources with step-up/down voltage functions.\nFinally, a prototype of the soft-switching SEPIC with multi-output sources is built and implemented.\nSimulated and experimental results are presented to verify the performance and the feasibility of the\nproposed soft-switching SEPIC with multi-output sources....
Herein, we present the design technique of a resonant rectifier for piezoelectric (PE) energy\nharvesting. We propose two diode equivalents to reduce the voltage drop in the rectifier operation,\na minuscule-drop-diode equivalent (MDDE) and a low-drop-diode equivalent (LDDE). The diode\nequivalents are embedded in resonant rectifier integrated circuits (ICs), which use symmetric bias-flip\nto reduce the power used for charging and discharging the internal capacitance of a PE transducer.\nThe self-startup function is supported by synchronously generating control pulses for the bias-flip\nfrom the PE transducer. Two resonant rectifier ICs, using both MDDE and LDDE, are fabricated in\na 0.18 �¼m CMOS process and their performances are characterized under external and self-power\nconditions. Under the external-power condition, the rectifier using LDDE delivers an output power\nPOUT of 564 �¼W and a rectifier output voltage VRECT of 3.36 V with a power transfer efficiency of\n68.1%. Under self-power conditions, the rectifier using MDDE delivers a POUT of 288 �¼Wand a VRECT\nof 2.4 V with a corresponding efficiency of 78.4%. Using the proposed bias-flip technique, the power\nextraction capability of the proposed rectifier is 5.9 and 3.0 times higher than that of a conventional\nfull-bridge rectifier....
This paper presents a second-order voltage-mode filter with three inputs and single-output voltage using single commercially\navailable IC, one resistor, and two capacitors. The used commercially available IC, called LT1228, is manufactured by Linear\nTechnology Corporation.The proposed filter is based on parallel RLC circuit.The filter provides five output filter responses, namely,\nband-pass (BP), band-reject (BR), low-pass (LP), high-pass (HP), and all-pass (AP) functions. The selection of each filter response\ncan be done without the requirement of active and passive component matching condition. Furthermore, the natural frequency\nand quality factor are electronically controlled. Besides, the nonideal case is also investigated. The output voltage node exhibits low\nimpedance. The experimental results can validate the theoretical analyses....
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