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This paper introduces the design of charge pump DC-DC boost converter with integrated low-voltage control circuit. By exploiting the advantage presented by the integration of both charge pump and control circuit within same CMOS technology, the DC-DC boost converter offers a low-power operation with a proper regulation. The error amplifier, comparator, and oscillator in the control circuit are designed with the supply voltage of 3.3V and the operating frequency of 5.5 MHz. The compensator circuit exploits pole-zero compensation for a stable operation. The power converter is measured in simulation. The test in 0.35 µm CMOS process shows that the output transient time of the compensator is controlled within 10 µsec and the output-voltage is accurately controlled from 4 ∼ 10 V with a small load current within 1 mA. [ABSTRACT FROM PUBLISHER]

This paper presents a new control circuit topology of the time-divided torque and suspension force control type bearingless motor. The motor structure, its principle of suspension force and rotational torque generation has been introduced. The proposed control circuit and its sequence of operation are explained in detail. In the new control circuit topology, the surge voltages which are applied in the switching devices are successfully suppressed. It is confirmed by the simulated results of the control circuit that the applied voltages in these devices are significantly reduced. The proposed control circuit topology is found effective to drive the time-divided type BELM. [ABSTRACT FROM PUBLISHER]

Recently, an all polymer system based biosensor with integrated optical read-out has been developed. Optical detection techniques are perhaps the most common due to their prevalent use in biology and life sciences. Fluorescence-based detection in Bio-MEMS has been applied to detection of cells within micro-chips, using antibody-based assays. Majority of the detection schemes in microarray and numerous lab-on-a-chip devices and applications utilize optical detection schemes. For size shrinkage, and to reduce the hardware we proposed the new read-out method which utilize the electrical detection method. The paper present design and analysis of microcantilever based biosensor based with electrical read-out method. This method is ideal for the manufacture of low cost disease diagnostic Kits. The sensor structure is designed and simulated using Coventorware software. The corresponding deflection with respect to voltage and stress is analyzed. To solve the fabrication process related issue of the sensor control circuit has been designed and tested using Spartan II-FPGA Kit & PCB. The reliability issues of the sensor are also studied. [ABSTRACT FROM PUBLISHER]