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A low-power low-voltage rectification and sample-and-hold circuit is presented. The circuit is based on transistors operating on weak inversion using a procedure developed in this paper. The proposed circuit can be programmed to function as sample-and-hold only or rectification and sample-and-hold. The design has been simulated with the CMOS 0.35 ??m, 3.3 V technology. For a power supply voltage of...
Design an electrical locomotive 110 V D.C. source with PFC based on the structure of two-stage switching converter. Discuss the design scheme of main circuit and control circuit. Expound the calculation method of the key parameters. The experiments indicate that the device gets good performance on output and reliability. The electric source is appropriate for electrical locomotive and the other similar...
AC-AC converters have wide applications in AC motor drives and marine power supplies. Modern direct AC-AC converters are based on the new topology of matrix converters. Despite excellent features, matrix converters suffer from the problems associated with bidirectional switch implementation. In this paper, a new direct AC-AC converter is presented. The proposed system has most advantages of modern...
High Voltage Power Supply (HVPS) of Diagnostic Neutral Beam (DNB) for HT-7 is presently operating. The high voltage pulse capacitor banks provide the primary voltage source for tetrode which is the system regulator by controlling the tetrodepsilas voltage drop between cathode and anode to get steady output voltage in DNB load. It will be introduced that a new capacitor banks charging system uses 3-phase...
This paper summarizes the personality and generality of common used topologies in power supply and puts forward novel switching-off model by analyzing and comparing the experiment waveforms with theoretical model. In the model, the effects of equivalent parallel capacitor of D-S and leakage inductance in the circuit serried with MOSFET drain are taken into account. The calculated results are compared...
The paper presents a quick-start CMOS voltage reference built within a positive LDO processed in a double-metal 0.5 mum CMOS technology. The reference consumes 10 muA, while delivering a stable output voltage of +1.25 V. The quick-start feature allows the active charging of an external 10 nF bypass capacitor within 200 mus. Power supply rejection ratio is 100 dB at low frequencies, while typical TC...
An IC design for high and low side gate drive is presented based on use of two identical low voltage ICs that provide a low cost alternative to existing high voltage IC drivers. The approach uses a single external coupling capacitor between the two ICs with on-chip circuitry to provide charge pump power supply and on/off signaling. Design details are given for each of the core blocks of a custom IC...
Plasma cutting power supplies in the power range 20 kW and above commonly use the hard-switched buck converter topology. This topology is simple and efficient when compared with SCR based methods. In addition, circuit reliability is achieved by using current controlled PWM technique at a typical switching frequency of 15 kHz. It is however estimated that device switching losses make up about two-thirds...
The main features of the buck DC-DC converter TPS54310 are presented. With the assist of the theoretical analysis, there is the circuit design, simulation and verification for the buck DC-DC power supply based on TPS54310 by using the Swift Designer software. The results show that the power supply has the advantages of high conversion efficiency, low power consumption, the stable and accurate output...
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