In this paper, a fast automatic precision approaching system is developed for electrochemical nanofabrication using visual and force-displacement sensing. Before the substrate is fabricated, the template should approach the substrate accurately to establish the initial gap between the template and substrate. During the approaching process, the template is first quickly moved towards the substra...

In this paper we design a low-voltage class-E power amplifier (PA) in a standard CMOS 0.35μm integrated technology, to be used in a UMTS transceiver having the following specifications: f=1.95 GHz, VDC=1 V, Pout=0.5 W. The designed class-E network accommodates the simultaneous presence of a parasitic ground inductance and losses in the switch and shunt-capacitor. The transistor is dimensioned f...

This paper analyzes some of the losses that occur in non-ideal passive components employed in the ClassE power amplifier. A complete analysis of the Class-E operation in the presence of the switch on-resistance and shunt capacitor ESR has been performed and an analytic dependence of the output efficiency on the parasitic resistances has been derived. New design equations for modified circuit el...

This paper presents a new force-sensitive surface designed for playing music. A prototype system has been implemented using a passive capacitive sensor, a commodity multichannel audio interface, and decoding software running on a laptop computer. This setup has been a successful, lowcost route to a number of experiments in intimate musical control.

background: intrapulmonary vascular abnormalities associated with liver cirrhosis may result in intrapulmonary right-to-left shunt and hypoxemia. the aim of this study was to use contrast enhanced echocardiography to detect intrapulmonary vascular abnormalities in patients with liver cirrhosis candidates for liver transplantation.   methods: one hundred and two adult patients underwent contrast...

A simple and reliable inverter is a prerequisite for realizing an efficient active power filter. This paper presents a reduced switch count (RSC) based asymmetrical switched dc sources inverterfor a threephase three-wire (3P3W)shunt active power filter (SAPF). The performance of considered RSCtopology is studied on seven-level asymmetrical configuration with simple level-shifted pulsewidth modu...

In this paper we demonstrate the capabilities of our mixed-signal, multi-domain system level simulation tool, Chatoyant, to model and simulate an RF MEMS shunt switch. We verify our mechanical simulations and analysis by comparison to results from commercial simulation packages, ANSYS and CoventorWare. We show that our modeling accuracy and simulation speed are comparable to these commercial to...

PSPICE modeling of a commercial LED driver IC (TOP245P) and PC817A optocoupler is proposed for the switch-mode power supply (SMPS) (applicable to LED driver) design and simulation. An analog behavioral model of the TOP245P IC including the shunt regulator, undervoltage(UV) detection, over-voltage(OV) shut-down and SR flip-flop is developed by using PSPICE. The empirical equation of PC817A curre...