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An integrated reset controller (voltage supervisor) is designed and implemented. The system generates a reset signal, active while power supply brownout conditions are detected and for 250 ms after the supply voltage has increased to acceptable levels. The circuit is built in a Deep N-Well (DNW) 5V 0.35μm CMOS process, which provides good isolation between the on-chip devices and the substrate. The...
This paper analyzes a new architecture of the AC/DC type power supply for data centers. The source cumulates the following functions: three-phase current rectification, transformation of voltage parameters and DC voltage stabilization. The source ensures the reactive power compensation and does not distort the currents in the power three-phase network. The transfer of power from the alternating current...
Reliable power supplies are indispensable for the control component of high voltage direct current switches. But power cannot be directly acquired from the high voltage side of the grid. Wireless power transmission is a practicable solution of supplying power. The efficiency of wireless power transmission system is directly influenced by the efficiency of the power supply. A power supply used on wireless...
A new digitally dynamic power supply technique for 16-channel 12-V-tolerant stimulator is proposed and realized in a 0.18-μm 1.8-V/3.3-V CMOS process. The proposed stimulator uses four stacked transistors as the pull-down switch and pull-up switch to withstand 4 times the nominal supply voltage (4 × V DD). With the dc input voltage of 3.3 V, the regulated three-stage charge pump, which is capable...
An operation of electronic equipment is dependent on a power supply. Today, a trend of only one AC/DC adapter is used for supplying an electronic system. Thus, an electronic equipment with various power supply requirements uses some internal DC/DC converters. These DC/DC converters adjust input voltage to lower or/and higher value or generate a negative voltage. The classical DC/DC converters are...
This paper presents the study on gate driver circuitries implemented to drive power devices in series connection with the objective to minimize the conducted EMI perturbations and as well to improve the switching speed of the power devices. More specifically, the propagation paths of parasitic currents generated under very high switching speed are studied in different configurations trying to reduce...
This paper addresses a design and performance evaluation of a non-clocked comparator circuit intended to work in a wide temperature range with very low value of the power supply voltage. Due to low voltage swing, the input voltage range is set to be rail-to-rail. The target fabrication process is a standard twin-well 130 nm CMOS technology, with appropriate parameters required to meet circuit specifications...
In this paper, we propose Without Charge Sharing Quasi Adiabatic Logic (WCS-QuAL) as a countermeasure against Power Analysis Attacks. We evaluate and compare our logic with the recently proposed secure adiabatic logic designs SPGAL and EE-SPFAL at frequencies ranging from 1MHz to 100MHz. Simulation results show that WCS-QuAL outperforms the existing secure adiabatic logic designs on the basis of %...
This paper presents a detailed analysis for the detection of resistive open and resistive short defects using delay test for a didactic circuit implemented in 28nm UTBB FDSOI technology. The two different VT options offered by the technology, i.e. Regular-VT (RVT) and Low-VT (LVT), are explored. Based on HSPICE simulations, this work determines the most suitable operating conditions in terms of power...
This paper presents a novel startup circuit that provides a startup operation for bias circuits and reference circuits. The proposed circuit employs delay buffer and series transistors to automatically turn off the startup circuit after the bias circuit has started. Thus, the proposed startup circuit consumes no power during the normal operation of the reference circuit and is useful for low-power...
An external capacitor-less low dropout (LDO) voltage regulator with high PSRR and enhanced transient response is presented. The novel idea is applying a replica circuit which can pull excessive current. Excessive Current Pulling (ECP) technique decreases the equivalent output impedance to enhance transient response. The proposed LDO has been simulated in 0.18 μm CMOS Technology. Its regulated output...
The paper describes schemes to stabilize of the output voltage of the high-voltage power supplies for the powerful traveling wave tubes. It is shown that the considered schemes provide the reliable power supply of the delay system of the traveling wave tube in complementary sets of load conditions and conditions of changing parameters of the mains. However, none of these schemes provides the reliable...
A charge pump with enhanced output voltage pumping gain and efficiency for low-voltage applications is proposed in this paper. Except for threshold voltage drop and body effect, another factor that limits voltage pumping efficiency is undesired charge transfer. The proposed charge pump circuit utilizes charge transfer switches to eliminate the effects of threshold voltage drop and body effect. Moreover,...
In this paper, we present the design and performance of a portable, arbitrary waveform, multichannel constant current electrotactile stimulator that costs less than $30 in components. The stimulator consists of a stimulation controller and power supply that are less than half the size of a credit card and can produce ±15 mA at ±150 V. The design is easily extensible to multiple independent channels...
This paper presents an experimental system that allows the study and testing of two proximity sensors (inductive and capacitive) and their use in an application. The guideline for studying these devices enables students to test the working modes of Turck inductive and capacitive proximity sensors, apply their previously acquired theoretical knowledge about sensors, transducers and electronic circuits...
Temperature variations caused by heat generation and dissipation can have significant performance implications on nanoscale CMOS logic circuits. In this paper, we show that such temperature-induced delay variations can be well controlled or even reduced by dynamically adjusting the voltage level of power supplies over a relatively small range. We thus propose a self-adaptive, temperature-aware voltage...
The motivation for this paper is the analysis of input conditions that cause a short-circuit in a logic circuit, that is, that create a direct path from the power supply to ground. We model the logic circuit as a graph where edges represent transistors which are either open or closed, function of the input conditions. From this graph we derive a Quantified Boolean Formula (QBF) problem whose solution...
The design and analysis of a two stage high swing operational amplifier commonly known as rail to rail opamp with 3.3V supply voltage used in high resolution ADC driver amplifier is discussed in this paper. The design uses 0.35μm CMOS technology with a differential stage for input and a common source stage (CS) as the second stage with output being single ended. The compensation technique used is...
The continuous time linear equalizer (CTLE) which compensates for the high frequency loss of electrical channels is one of the key components in the design of digital serializer / desrializer (SerDes) circuits. A new technique is described to improve the CTLE performance without any area or power overhead. This technique utilizes the bulk pin of transistors as a second gate. The proposed CTLE is designed...
A low drop-out (LDO) voltage regulator with high power supply rejection ratio (PSRR) and enhanced transient response is presented in this study. The proposed idea is to apply a replica circuit that injects current into the second stage of the error amplifier. The LDO is being fabricated in Magna Chips CMOS Technology. The regulated output voltage of the LDO is 1V with the power supply voltage of 1...
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