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This paper presents an output-capacitorless low-dropout (LDO) regulator with with −132dB power supply rejection ratio (PSRR) at 1KHz. By using a Rising-Class-A voltage buffer, the non-dominant parasitic poles can be pushed to higher frequencies and leads to good stability in power supply rejection ratio (PSRR) performance. The proposed circuit is designed with 0.18-µm CMOS process technology. The...
This paper presents a capacitor-less low drop-out regulator (LDO) with sub-bandgap voltage reference and damping-factor-control (DFC) compensation strategy, which is suitable for system-on-chip (SoC) design. The proposed LDO has been designed and simulated in SMIC 0.18μm CMOS technology. It consumes a quiescent current of 45 μA withonly 45nA current consumption in sub-bandgap circuit and occupies...
This paper presents an ultra-low quiescent current output capacitor-less Low-dropout (LDO) regulator with a novel slew-rate-enhanced (SRE) circuit. By adopting the novel SRE circuit, the transient response of the regulator was improved apparently. Simulation results show that, the LDO regulator consumes a quiescent current of only 930nA at steady state.
From October 2008 the interconnection between northeast and north power grid switched from alternating current to direct current. It is urgent to research the stability of northeast power grid based on the real network data. This paper studied the stability changing by applying real-time time-domain simulation method and frequency-domain analysis method. Research result indicated that the stability...
This paper has discussed observer-compensator control scheme of time-delay system, and pointed out that this scheme was some sensitive to gain variation of object. It proposed a kind of self-tuning OC (STOC) control scheme. Theoretical analysis and simulation results showed that STOC control scheme had a greater robustness and control quality more than OC control scheme; especially STOC control scheme...
This paper presents a control scheme of intelligent observation compensator on the basis of the control scheme of observation compensator by adding intelligent controller and intelligent switch. Thus the capability of tracking, anti-disturbance and stability of the system are enhanced. Theory analysis and simulation experiment show that the control scheme of intelligent observation compensator has...
In this work, the bulk-gate controlled circuit to improve the power supply ripple ratio (PSRR) of a Low Dropout Regulator (LDO) which deteriorates due to lowering power consumption is proposed. Designing with 0.25 mum CMOS process, the simulation results by HSPICE shown that the proposed circuit provides a high performance of PSRR even though 1/10 of the power consumption is reduced compare to the...
This paper is concerned with the design and simulation of a pulse width modulation (PWM) rectifier for three-phase Permanent Magnetic motor drive. Based on the mathematical model of PWM rectifier, the dual-close-loop engineering design with decoupled feed-forward control is applied in the 3-phase voltage source rectifier. The objective to be reached is to realize unity power factor at the input ac...
We described an EPC (electronic power conditioner) developped for French Telecom administration for an 12 GHz 20 W TWTA (Travelling wave tube amplifier). • EPC1 requirements are submitted and the electrical design which used MC2 (currentcontrol- modulator) control is described with associated results. An simulation model is proposed. Particular technological points such High-voltage transformer, hybrid...
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