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Electric Double Layer Capacitor (EDLC) is used as an electric energy storage device because it has large capacity. In the energy storage system composed of series-connected EDLCs, each cell has a different voltage because of the individual characteristic and of repeating charge and discharge. This difference of voltages deteriorates the performance of the whole storage system. In this paper, a novel...
To realize battery-free operation employing energy harvesting, a step-down switched-capacitor-based converter has been used as a vibration-to-electricity converter. In this paper, to improve power efficiency, a step-down ACDC converter realizing 1/N (N=2,3,... ) conversion modes is designed by using switched-capacitor techniques. Although conventional converters offer an output by regulating the stored...
Threshold testing, which is an LSI testing method based on the acceptability of faults, is effective in yield enhancement of LSIs and selective hardening for LSI systems. In this paper, we propose test generation models for threshold test generation. Using the proposed models, we can efficiently identify acceptable faults and generate test patterns for unacceptable faults with a general test generation...
Aimed at a backlighting application, a multiple-input switched-capacitor (SC) DC-DC converter with battery charge process is proposed in this paper. Unlike conventional SC power converters such as a Dickson-type converter, etc., the proposed converter drives some LEDs by converting energy from solar cells when solar cells offer enough energy. Furthermore, the proposed converter can charge a lithium...
A register-transfer level (RTL) circuit meeting a design specification may contain some functionally unused paths. If functionally unused paths can be easily identified at RTL, the information can be utilized to eliminate the corresponding gate-level paths from the target of testing. Testing such gate-level paths is considered to be futile. In this paper, we present a method for identifying such functionally...
Aimed at mobile applications such as backlighting applications, battery applications, etc., a switched-capacitor (SC) DC-DC converter which offers a (N-s+)/(N-s) times mode ((N=1,2...) and (s=0, 1, 2,...)) as well as a step-down mode of operation is presented in this paper. Compared with the conventional versatile converters, the proposed converter can realize high efficiency and flexibility of output...
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