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The paper proposes a power supply unit to efficiently supply always-on or duty-cycled IoT loads which consumes in μW-range. This PS achieves the highest 93% and 99% current efficiencies at average output currents of 1μA and 100μA to date, respectively. This unit includes a voltage reference and oscillator to generate autonomously duty-cycled power delivery operation as low as a 30μ8 on-period. The...
The subject of this article is the development and the testing of a low noise DC-DC power supply for high precision Analog-to-Digital Converters and signal conditioning circuits in a battery monitoring systems. The synthesized structural diagram includes a low voltage input DC power supply, a resonant voltage inverter, a fast recovery rectifier, a filter and a linear voltage regulator. Different types...
In this paper, a brushless DC (BLDC) motor control system is implemented to apply to an x-by-wire system based on ISO 26262 which is a functional safety standard for road vehicle. Recently, conventional mechanical and hydraulic systems are replaced by electric/electronic (E/E) systems to enhance the vehicle driving performance and safety. Particularly, because x-by-wire systems have the safety-critical...
The modified emitter follower compensation circuit is discussed and the principle of a slop compensation circuit is also analyzed. Focusing on transformer primary side existing current peak when duty ratio of peak current-mode control power converter is higher than one half. Theoretical analysis shows that this circuit can eliminate the phenomenon of current peak, increased the range of the duty ratio...
Recent progress of JAEA high power long pulse gyrotrons is reported. Multi-frequency oscillation and the high efficiency long distance power transmission were demonstrated at three frequencies, 170 GHz, 137 GHz and 104 GHz. The output power of 1 MW was obtained at three frequencies. The transmission efficiency from the gyrotron window to the end of the 40 m transmission line is 91 %, 89 % and 84 %,...
The Electromagnetic Compatibility (EMC) is a major issue for the truck crane designing, due to the large dimension. The conducted disturbance sources of truck crane was measured under stable conditions, the time domain characteristics of possible conducted disturbance sources was analyzed, and typical waveforms were concluded to solve the EMC (Electromagnetic Compatibility) issue. The electromagnetic...
In a DC power supply system with a constant power load (CPL) and a LC filter, the input voltage may oscillate due to an impedance interaction between output impedance of a LC filter and input negative impedance of a CPL around the operating point. This paper proposes a control method of the oscillation by using a bi-directional DC-DC converter and a power storage capacitor. In the method, the four...
This article designed an improving high voltage discharging ozone generating system. By analyzing the disadvantages of the present high voltage discharging ozone generating systems, we elastically designed a discharging system with double power supply module, matching the low-power oscillating circuit, the transformers with low circle number and voltage-multiplying rectification circuit, and assisted...
This paper investigates a novel varying-frequency isolated drive power supply method using an isolation method to drive a primary side high-voltage circuit of a power supply by a secondary side PWM, while using a varying-frequency method as a control method to enhance effectiveness and efficiency. The control method mainly focuses on the importance of present power management and energy saving, so...
In the mode of owned generators power supply system accompanying with electric network running in case conking out of the external electric network such as lost-, short-circuit-, etc and they were handled improperly, the voltage frequency of the generators power supply system will blackout then result in generators' wearing down, the factory power's cut and off production, afterwards huge economic...
Digital control of a general-purpose switching power supply is one of the key technologies to perform the high reliability and the intelligent function demanded for the next generation. The contribution of this paper is the development of a digital control-based switching power supply. In the developed system, the generation method of the optimal voltage reference in accordance with the output voltage...
In this paper, the fundamental principle of bipolar process-based current-controlled PWM switching power supply is presented. The advantages of current-controlled PWM switching power supply are pointed out, and the design, operational principle, and layout of major functional units of the circuit are briefly described. The operating frequency of the circuit is up to 1MHz. The current-controlled PWM...
In this study, the design and typical applications of an isolation feedback generator circuit were presented. The circuit was processed in 40 V SOI bipolar process technology, and integrated the precision reference source, the high-frequency oscillator, the error amplifier, and the complete modulation module, and simplified the design of the isolation and closed-loop feedback of primary switching...
Polymorphic gates can be considered as a new reconfigurable technology capable of integrating logic functions with sensing in a single compact structure. Polymorphic gates whose logic function can be controlled by the level of the power supply voltage (Vdd) represent a special class of polymorphic gates. A new polymorphic NAND/NOR gate controlled by Vdd is presented. This gate was fabricated and utilized...
A high intercept points, cost-effective, and power-efficient switching FET double balanced mixer (DBM) is reported. The Switching FET DBM demonstrated in this work offers input intercept points (IIP3) and conversion loss typically 44 dBm and 8.5 dB respectively with 15 dBm LO power for the frequency band (RF: 900-2150 MHz, LO: 850-1950 MHz, IF: 50-200 MHz). The measured interport isolation is typically...
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