Query: novel high-efficiency power supply

title: A high efficiency, low noise power solution for a dual channel GNSS RF receiver
abstract: A high efficiency low noise power solution for a dual channel GNSS RF receiver is presented.The power solution involves a DC DC buck converter and a followed low dropout regulator(LDO).The pulsewidth modulation(PWM) control method is adopted for better noise performance.An improved low power highfrequency PWM control circuit is proposed,which halves the average quiescent current of the buck converter to 80mA by periodically shutting down the OTA.The size of the output stage has also been optimized to achieve high efficiency under a light load condition.In addition,a novel soft start circuit based on a current limiter has been implemented to avoid inrush current.Fabricated with commercial 180 nm CMOS technology,the DC DC converter achieves a peak efficiency of 93.1%under a 2 MHz working frequency.The whole receiver consumes only 20.2 mA from a 3.3 V power supply and has a noise figure of 2.5 dB.

title: A high efficiency, low noise power solution for a dual channel GNSS RF receiver
abstract: A high efficiency low noise power solution for a dual channel GNSS RF receiver is presented. The power solution involves a DC DC buck converter and a followed low dropout regulator (LDO) The pulse width modulation (PWM) control method is adopted for better noise performance. An improved low power high frequency PWM control circuit is proposed, which halves the average quiescent current of the buck converter to 80 A by periodically shutting down the OTA. The size of the output stage has also been optimized to achieve high efficiency under a light load condition. In addition, a novel soft start circuit based on a current limiter has been implemented to avoid inrush current. Fabricated with commercial 180 nm CMOS technology, the DC DC converter achieves a peak efficiency of 93.1% under a 2 MHz working frequency. The whole receiver consumes only 20.2 mA from a 3.3 V power supply and has a noise figure of 2.5 dB.

title: Design and optimization of high current intelligent waveform power supply for electroplating
abstract: In this paper, a 200kW high power intelligent waveform electroplating power supply with an improved circuit topology is described. In order to realize the expansion of output power and high efficiency with intelligent output, the modular design and optimization of the structure is taken into consideration. A topology, which consists of a ZVS phase shifted full bridge circuit and a full bridge inverter, is proposed. To realize the high frequency of intelligent waveform, a power snubber circuit is developed. In addition, a novel MOSFET full bridge inverter module is designed to reduce the power loss, and detailed thermal simulation to verify its improved thermal performance is also realized. Finally, an independent digital control system is fully applied to each power unit to realize the waveform control and better performance of current sharing between units.

title: Novel driving circuit with fast energy transfer speed and high efficiency for plasma televisions
abstract: A novel driver with low cost and low rating devices is presented for plasma display panels (PDPs) based on a compromise of high efficiency and fast energy transfer speed. Since the proposed driver has been designed by devices with half of voltage rating compared with the conventional drivers, it can take advantages of semiconductor devices with reduced conduction and switching losses as well as cheaper costs. The proposed driver configures the sustain circuit and the resonant circuit in such a way that the resonant network is energized by the sustain voltage level and the half sustain voltage level in charging and discharging the panel capacitor, respectively. Therefore, the proposed driver is designed for the purposed of fast voltage transition and high efficiency during the up commutation and down commutation periods, respectively. Moreover, the proposed driver is supplied from half of required sustain voltage level. The reduced supply voltage of the driver results in cost reduction and improved efficiency in the power supply blocks. As a result, the PDP driver presented in this paper can feature faster sustain voltage transition, higher brightness, high efficiency, and lower cost.

title: Design of a novel auxiliary power supply for a PV inverter
abstract: The principle of boundary mode of isolated flyback topology was analyzed,a five output auxiliary power supply for 3 kW solar power inverter without the optocoupler feedback regulator circuit was presented,with the characteristics of simple structure,low cost,high efficiency and high reliability.The multi output auxiliary power supply of PV inverter schematic and a high frequency flyback transformer detail design were given.And EMI suppression measures in the solar power inverter auxiliary power supply design was described.This power supply has been already used in an inverter.The experiment results prove that the power supply works well,and its output ripple is small and the transformer works well with no fever phenomenon,and can meet the requirements of solar power inverters.

title: Novel Switch Power Supply in Parallel System Design
abstract: This system uses low power single chip STC12C5204AD as the control core,producing two PWM to drive the switching tube SFR9034 MOS pipe,combined with AD feedback made two controllable DC DC parallel power.It can realize the constant voltage output,and in accordance with the arbitrary adjustment of the ratio of the output current,current limiting protection control.It works stably,has high efficiency,meets the requirements of application.

title: Design and Development of a High Voltage Transformer less Power Supply for Ozone Generators Based on a Voltage fed Full Bridge Resonant Inverter
abstract: It is known that transformer based power supplies for ozone generators have low efficiency, high cost and exhibits a limited frequency range of operation. To overcome these disadvantages, this paper proposes a high frequency ozone generator with the absence of a transformer. The voltage step up is achieved only by utilizing the resonant tank. This is made possible by a novel combination of ozone chamber materials that allow ozone to be generated at only 1.5 3.5 kVp p. The input to the resonant tank is driven by a PWM full bridge resonant inverter. Furthermore, zero current zero voltage switching (ZCZVS) operation is achieved by employing a duty factor of 25% between the switches of the full bridge. The advantages of the proposed system include high efficiency, low cost and the ability to control ozone production by varying the input voltage to the inverter. The prototype is verified by both simulation and experimental results.

title: A High Efficiency Green Mode Switch Mode Power Supply Regulator
abstract: A novel green mode switch mode power supply (SMPS) buck regulator with an on chip power switch is proposed.By adopting PWM/Burst multi mode operation,its conversion efficiency is enhanced over the entire load range.It reduces the light load and standby power dissipation of modern portable products powered by batteries,which results in prolonging their standby time and battery lifetime.Moreover,a seamless transition is successfully realized by over voltage suppression.In addition,an on chip current sensing technique with high precision and efficiency has been introduced into the control strategy to improve its efficiency further.The regulator is designed and fabricated in 1.5mm BCD (Bipolar CMOS DMOS) technology.The test results show that all expected performances are achieved.

title: Digital Predistortion for Wideband High Efficiency RF Power Amplifiers for High Throughput Satellites
abstract: In satellite communications, there is considerable increasing demand to support higher data throughput on necessarily pre allocated bandwidth channels. In communication payloads, the DC to RF power conversion efficiency is crucial and most of the DC power is consumed by the RF Power Amplifier (PA) Thus, maximizing the PA efficiency while maintaining low distortion is key. Both power and bandwidth efficiency could be increased by employing digital pre distortion (DPD) This paper focuses on state of the art DPD techniques and possible developments to fit in satellite communications. The toleration of effects of temperature, supply voltage, and load mismatch variations, are investigated. This research suggests that there are benefits to be gained; employing spectrally efficient modulation techniques and transmitting a high fidelity signal to result in less expensive space and ground segment transmitters. A proof of concept by simulation is presented for ultra wideband applications. A novel DPD system architecture is proposed where envelope tracking (ET) of the driver amplifier (DA) and load modulation of the PA are used to maximize the overall PAE while high PAPR signals can be used. To the best of the authors' knowledge, this is the first time that DPD has been proposed for large fractional bandwidth high PAPR signals for satellite communications.

title: A novel high efficiency UPS using improved inverter and DC to DC converter
abstract: The uninterruptible power supply (UPS) presented combines a rectifier of high input power factor, a DC/DC power converter and a pulsewidth modulated (PWM) inverter. However, in the inverter circuit, because a divided choke snubber was devised, short circuit failure can be avoided without giving the drive pulse of switching element a dead time period. Also because an LD snubber was designed, the current surge and the voltage surge do not occur. The performance of the switched snubber, the effectiveness of the LD snubber and of the divided choke snubber were verified by the experiments. Experimental results of testing these schemes are reported.<ETX>