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Various applications in the modern world require DC supply. Some applications needs low DC voltage and some require considerably high DC voltage. We get AC supply and that needs to be converted to DC for these applications. In this paper AC - DC step up and step down converters without the use of bridge rectification is dealt. In step up converter, low AC voltage micro generators are used and the...
If energy requirements of electronic components decline reasonably, then ambient energy scavenging and conversion could become a viable source of power for many applications. Ambient energy sources can be then considered and used to replace batteries in some electronic applications, to minimize product maintenance and operating cost. Power scavenging may enable electronic devices to be completely...
This paper presents a generalized mathematical model for a vector inversion generator, through which semi-analytical solutions for component stresses and output characteristics can be obtained. The derivation of a simplified equivalent circuit for transient analysis of the converter is presented in detail. The equivalent circuit model is used to analyze the performance of a 2-stage and 6-stage vector...
An on-chip buck converter with 3D chip stacking is proposed and the operation is experimentally verified. The manufactured converter achieves a maximum power efficiency of 62% for an output current of 70mA with a switching frequency of 200MHz and a 2x2mm on-chip LC output filter in 0.35mum CMOS. The use of glass epoxy interposer to increase the maximum power efficiency up to 71.3%, and the power efficiency...
A new low-jitter polyphase-filter-based frequency multiplier incorporating a phase error calibration circuit to reduce the phase errors is presented. Designing with a multiplication ratio of eight, it has been fabricated in a 0.13-mum CMOS process. For input frequency of 25 MHz, the measured jitter is 2.46 ps (rms) and plusmn9.33 ps (pk-pk) at 200-MHz output frequency, while achievable maximum static...
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