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A typical problem in modern intelligent lighting systems is the power supply of smart control devices replacing conventional, series connected light switches or dimmers. This paper proposes a two-stage power supply concept that overcomes the involved issues and compares it to a recently published work [1]. Both concepts can operate without a neutral wire connection at the light switch lead out. The...
This paper presents an application of the developed platform for dynamic mode, current source power supplies with ability of energy recuperation from the load to the dc-link capacitors of the power supply. The developed universal and modular platform is suitable for current source power supplies feeding superconducting magnets in particle accelerators with lower energy stored in magnets and with lower...
This paper presents the fabrication and application of a mobile chamber (M-Chamber) for lab bench characterizations that involves high power measurement such as short circuit measurement, current limitation and big load application measurement. Most of the available power supplies in the lab do not have the capability to provide high current; hence, it is needed to apply capacitors in the bench setup...
The article will describe possibilities and utilization of controlling of magnetic energy recovery switch, as well as simulation and practical realization of this device. The article is devided to four parts. The first part deals with MERS circuit description. MERS simulation is the goal of the second part. The third part contains measurement description and analysis of obtained measured results....
This paper presents the design of an output-capacitor-free cascode low-dropout regulator (LDR) with low quiescent current and high power supply rejection (PSR) over a wide range of frequency. In the proposed LDR topology, power NMOS transistors are cascoded to isolate the core regulator from power supply ripples, thus providing high PSR even without any external filtering capacitors. By biasing the...
In order to solve the problem of field testing the surge protective device (SPD) of the electrical and electronic equipments in low-voltage (LV) power system, this paper proposed a portable field test system for SPD. The tester can output waveform of 1.2/50 μs ~ 8/20 μs combination wave and produce DC high voltage, which can do impulse test and DC detect on SPD. This paper mainly talked about how...
Power distribution network (PDN) of LSI has become one of important design parameters to reduce simultaneous switching noise for core circuits as well as I/O circuits. Power distribution network of LSI generally consists of meshed power and ground conductors and on-chip decoupling capacitors. For mobile communication and automotive applications, switching current of high-performance CMOS LSIs must...
In digital designs, it becomes more and more important to reduce the supply current variations (di/dt noise) they induce in the supply lines. This is due to the fact that steep variations in supply current give rise to EM (electro-magnetic) emission. Hence, integrated circuits with lower emission are greatly demanded, especially in the automotive market. This paper describes several efficient low...
This paper reviews recent experimental confirmations that the intrinsic radiation robustness of commercial CMOS technologies naturally improves with the down-scaling. When additionally using innovative design techniques, it becomes now possible to assure that performance and radiation-hardness are both met. An illustration is given with an original nano-power and radiation-hardened 8 Mb SRAM designed...
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...
This paper describes a comparative analysis between two topologies of operational amplifiers to design a 40 MS/s 12-bit pipeline analog to digital converter (ADC). The analysis includes AC and transient simulation to select the proper topology. This ADC is implemented in a 0.35 mum AMS CMOS technology with 3.3 V single power supply. The capacitors and selected operational amplifiers were scaled for...
Class D amplifiers are becoming the most feasible solution for embedded audio application. However, distortions due to the non-linear nature of switching stage are the main drawback for this amplifier topology. This paper discusses the design and implementation of high fidelity audio class D using sliding mode control scheme. This design method proves to be a cost effective solution for industrial...
Predicting methods of common mode radiated emission of power bus structure have been investigated. Transient current flows at the power supply terminal was assumed to an exciting source, and the power bus consisted of power and ground planes was assumed to work as antenna of common mode radiation. Two simulation approaches were studied: one is a time-domain response-based approach, and another one...
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