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Modular multilevel converters (MMC) have many advantages owing to their power-stage modularity. However, this modularity does not extend directly to the control. Particularly, the balancing control usually requires central coordination and increases in complexity with the system size. This paper presents a balancing control method for a more general modular multilevel converter with series and parallel...
In this paper, a non-overlap clock (NVC) generator for high accuracy fully differential Switched Capacitor (SC) readout circuit which is applied in Micro-Electro Mechanical System (MEMS) differential sensor is proposed. Compared with traditional generator, generating a set of non-overlap clock, this circuit generates a new set of clocks which are being nested inside the primary non-overlap clocks,...
This paper presents dc-dc converter based on voltage dividing class E amplifier. Class E2 dc-dc converter, which is one of the converter suitable for high operating frequency is studied. Class E2 dc-dc converter composed of a Class E amplifier and Class E rectifier. the amplifier side and rectifier side of class E2 dc-dc converter can achieve ZVS and ZDS. However, it is indicated that peak switch...
The paper proposes a new step-up topology with high step-up conversion ratio. Dc analysis is performed and the static characteristics are derived revealing that the static conversion ratio exhibits a high voltage boost, the converter still operating at reasonable duty cycles. Compared to a classical Boost, the static conversion ratio at the same duty cycle D is (1+nD) time higher, where n is the transformer...
This paper presents the analysis and design of isolated voltage-fed single-switch soft-switched converter for magnetron filament heating. A step-down transformer is used to obtain the required voltage conversion ratio and isolation. By low-damped resonance, the primary transistor achieves zero-voltage switching. The secondary diode naturally attains zero-current switching due to discontinuous current...
This paper presents a clock-feedthrough compensation technique for bootstrapped switches. The proposed technique utilizes a dummy transistor to generate a reverse voltage, which compensates the input-dependent error caused by clock feedthrough effect of sampling switch. Simulation result shows the differential sampling error of bootstrapped switch reduces from 7.2mV to 1.4mV for the worst case, operating...
The very high voltage ratio has been achieved by introducing the switched-coupled-inductor to the quadratic boost converter and combining it with the diode-capacitor Dickson multiplier. The operating principles and steady-state analyses of continuous conduction mode are performed. The formulas to calculate the maximal voltage stresses on the transistor and on the diodes are provided. Simulation and...
This report studies the influence of printed circuit board (PCB) design on voltage overshoot and ringing oscillation in switching operation of gallium nitride gate injection transistor (GaN-GIT) for high-frequency DC-DC converter. The parasitic inductances in the main power loop have been identified based on moment of method (MoM) analysis and frequency characteristics of impedance measured with 2-port...
This paper presents a novel architecture for a kilo-ohm to giga-ohm pseudo-resistor (PR), based on transistors operating in subthreshold with a fixed-Vgs configuration. This PR when used in an RC filter has a very low and constant settling time regardless of the programmed pole frequency. The proposed PR takes advantage of bootstrapping to improve its tuning range. By defining a constant VGs for the...
This paper presents a detailed noise and non-linearity analysis of a 10-bit 1.2Vppd 50MS/s charge-injection based SAR-ADC designed in a 65 nm low power process. Being more area-efficient in contrast to a conventional capacitor DAC, a charge-injection-cell-based DAC allows to reuse its DAC cells during binary search. Based on extensive calculations and transistorlevel simulations, the charge-injection...
This paper presents a seven level inverter utilizing switched-capacitor technique. Proposed topology employs two asymmetric DC voltage sources as input and generates a multilevel staircase output. The structure includes a front-end switched-capacitor based DC-DC converter cascaded by a back-end H-bridge inverter. The frontend SC DC-DC converter feeds three DC voltage levels to the H-bridge inverter...
This paper proposes new step-up DC-DC converters with high ratio capability. The proposed DC-DC converters are derived using combination of boost converters and buck-boost converters. A high ratio capability is achieved by parallel input and series output combination so that the efficiency is better than the one that is achieved by using a conventional boost converter. A method to reduce the input...
An analysis of high speed sample and hold circuit in different structure is presented. Performance and area comparison between two type of sample and hold circuit in low voltage is done. These different type of circuits are simulated and layout designed in 55nm CMOS technology. Both the structures based on a bootstrap switch that can acquire analog wave forms at sampling rate of 100MHz with 10 bit...
A recent trend in the electronics industry is the concept of intelligent wearables and the Internet of Things (IoT) such as smart watches, fitness trackers, smart sensors, and smart glasses. Low power consumption is a requirement of the processors and the increasingly large embedded SRAMs in such devices. Lowering the operating voltage of these devices makes them low power. However, process variation...
In this paper the simple method to reduce the switching energy of capacitive digital-to-analog converters (DACs) in low-power successive approximation register (SAR) analog-to-digital converters (ADCs) is described. The method is based on the well-known monotonic switching procedure and the use of one intermediate voltage level during switching. Unlike most recently published switching methods the...
In this paper we examine a new architecture for the inverter used in the conversion of electric energy produced from sources of renewable energy. This type of inverter is particular because the compensation of current with double frequency is performed by a special block. In this block, like in the inverter, the switching of electronic keys is realized using the Triangular Current Mode method, which...
This paper presents a new method for ring amplifier biasing to improve their stability while maintaining high slew rate. A multi-path ring amplifier is proposed for switched capacitor applications that allows accurate charge transfer at high speeds. Dynamic biasing improves large signal slewing without affecting residue amplifier settling performance. Stable operation is possible because the auxiliary...
A novel solution of a single-stage buck-boost inverter with unfolding circuit at the output stage is presented. The inverter has a wide range of input voltage regulation, minimum passive components and a very flexible control structure. It can be applied for renewable energy systems where high power density is required. Our simulation results confirmed all theoretical statements.
The method of modeling of the SEPIC converter power part in the MicroCap program based on the creation and study of pulse and continuous converter models is considered in this paper. The aim of the pulse model research is to determine losses in the power elements and the total efficiency of the converter. The research of the converter dynamic properties by means of the continuous model allows one...
This paper analyses a wireless power transfer (WPT) system using the current-fed power electronics topology through a full-bridge resonant DC-DC converter using non-dissipative switching through the zero voltage switching method (ZVS) to achieve greater efficiency and reduce stress in semiconductor power. The main contribution is the analysis and design of this type of converter for WPT application...
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