AC drives based on pulse width modulation (PWM) voltage source inverters (VSI’s) have many drawbacks, Especially for high performances applications. The inverter nonlinearities such as dead time and power devices voltage drop are one of the main reasons. In this paper a new method to estimate and compensate inverter nonlinearities is presented. The proposed method is based on Model Reference Ad...

A novel method is presented for online estimation of the junction temperature (Tj) of semiconductor chips in IGBT modules, based on the voltage drop (VEE’) across the parasitic inductor that exists between the main emitter (E) and auxiliary emitter (E’) terminals. The peak amplitude of the voltage drop (VEE’) was found to depend on the junction temperature at a known current and DC link voltage...

We use X-ray photoelectron spectroscopy (XPS) for characterization of voltage drop variations of large area single-layer graphene on quartz substrates, by application of a voltage bias across two gold electrodes deposited on top. By monitoring the spatial variation of the kinetic energies of emitted C1s photoelectrons, we extract voltage variations in the graphene layer in a chemically specific...

Electrically-heated suspended, nearly defect-free, carbon nanotubes (CNTs) exhibiting negative differential conductance in the high bias regime experience a sudden drop in current (or “kink”). The bias voltage at the kink (Vkink) is found to depend strongly on gate voltage, substrate temperature, and gas environment. After subtracting the voltage drop across the contacts, however, the kink bias...

Transient response; Power supply rejection. Abstract—To realize DC voltage conversion from 3.3V to 1.8V for SoC application, a fully on-chip Low Drop-Out (LDO) voltage regulator with 150mA driving capability is presented. Implemented in 0.18μm CMOS technology, the proposed LDO voltage regulator utilizes paralleled input differential pairs and current amplifiers to provide fast transient respons...

─An on chip low drop out voltage regulator that employs elegant compensation scheme is presented in this paper. The novelty in this design is that the device parasitic capacitances are exploited for compensation at different loads. The proposed LDO is designed to provide a constant voltage of 1.2V and is implemented in UMC 180 nano meter CMOS technology. The voltage regulator presented improves...

In power systems, custom power devices are used in series to avoid the voltage drop. Dynamic voltage restorer (DVR) is one of these tools. The various control techniques are available for the operating DVR. This paper is to use the dq0 technique to control DVR Series as a compensator for protection at fault furthermore, dents and bump's voltage sensitive loads to the system. The proposed contro...

The demand for low-voltage, low drop-out (LDO) regulators is increasing because of the growing demand for portable electronics, i.e., cellular phones, pagers, laptops, etc. LDO’s are used coherently with dc-dc converters as well as standalone parts. In power supply systems, they are typically cascaded onto switching regulators to suppress noise and provide a low noise output. The need for low v...

A 3-5V 50mA CMOS low Drop-out (LDO) linear regulator with a single compensation capacitor of 1pF is presented. The circuit realization is well-studied and developed with respect to the loop-gain response, the transient response, the output noise, the output accuracy, as well as the standby power consumption. The proposed LDO regulator is implemented in the AMI 0.6um CMOS process, the active lay...