The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper presents a UHS-II SD card controller with 240MB/s write and 260MB/s read throughput. Two opposite direction IO lanes for down- and up-streams are quickly switched as single direction for double data rate, without adding extra IO pins. The proposed clock data recovery (CDR) logic can detect symbols within 20ns and minimizes this lane switching overhead. The developed SLVS-type driver that...
A high performance Advanced Metering Infrastructure (AMI) is key to the adequate development of the Smart Grid. There are several technologies that can be used to deploy it, being PLC (Power Line Communications) the most extended, at least in western European countries. A PLC AMI is composed of a data concentrator and a number of meters, being restricted to a transformer substation due to the properties...
Since the loss of input rectifying diode bridge in the conventional PFC converter reduces the efficiency, the bridgeless PFC converter has been proposed. The totem-pole bridgeless PFC converter is the most representative one. However the common mode noise current occurring around the input voltage zero-crossing brings severe EMI problem restricts its practical application. In order to improve noise...
In this paper it is presented a design technique of a linear power supply destined to be used in applications where a low electromagnetic interference (EMI) is requested. The output voltage on the load can be modified by an external control analog signal. The main element of this power supply is a multi-tap transformer which outputs a switching voltage in steps to a linear regulator. A low voltage...
Magnetic Resonance Image is one of the technologies used for diagnosing brain cancer. Radiographers use the information obtained from MRI images to diagnose the disease and plan further treatment for the patient. MRI images are always corrupted with noise. Removing noise from images is crucial but it is not an easy task. Filtering algorithm is the most common method used to remove noise. A segmentation...
A chopped capacitively-coupled instrumentation amplifier (CCIA) with a proposed duty-cycled Gm-C DC servo loop (DSL) for bio-potential signal acquisition is presented. The proposed architecture realizes a large time constant with small circuit area without sacrificing noise and power performance. Furthermore, this pseudo-resistor-less design grants this architecture easily portable for more advanced...
Compact size wearable devices require multiple supplies with relative large loading difference, which causes serious cross regulation, large ripple and oscillation in single-inductor multiple-output (SIMO) DC-DC converter. Thus, a continuous conduction mode/green mode (CCM/GM) relative skip energy control (RSEC) in single-inductor multiple-output (SIMO) is proposed for wearable device power solution...
This paper describes a novel concept to encode amplitude and phase information in binary waveforms for switch-mode power amplifiers (SMPAs). A combination of a phase-modulated delta-sigma modulation (DSM) and pulse-width modulation (PWM) makes it possible to adapt signal generation to the power amplifier limits. The proposed system overcomes the inherent signal quality limits of digital systems with...
This paper presents an investigation about Switched Beam Antennas (SBA) for indoor positioning systems based on RSSI measurements. Given practical consideration on hardware costs, the device in exam is based on low-cost commercial components capable of standard WiFi connectivity at 2.45 GHz.
Infants often synchronize rhythm pattern of their body movement with their caregivers. Developmental scientists assume that infant-caregiver body synchrony is a fundamental factor for maturing their close relationship and it facilitates social development of infants [1–2]. When multiple individuals are in synchrony, they tend to mimic each other's behavior [3]. One agent generates own behaviors on...
This paper describes a novel concept to encode amplitude and phase information in binary waveforms for switch-mode power amplifiers (SMPAs). A combination of a phase-modulated delta-sigma modulation (DSM) and pulse-width modulation (PWM) makes it possible to adapt signal generation to the power amplifier limits. The proposed system overcomes the inherent signal quality limits of digital systems with...
Power loss at the output stage of conventional constant current neural stimulators is notably high. This is particularly disadvantageous for applications in implantable systems where power budget is limited. We present a novel electrical stimulator architecture for significantly reduced power loss and low noise operation. The system generates a calibrated output voltage profile for driving electrode...
Proposed in this paper are three different implementations for digital average current mode control for DC-DC converters operating in the continuous conduction mode. The advantages and disadvantages of each implementation are described. Design procedures for the both the voltage and current loops are described. Using a boost converter prototype, the dynamic performance of all three implementations...
This paper presents low-switching-loss and low-switching-noise gate driver for Silicon-Carbide (SiC) — Metal-Oxide-Semiconductor Field-Effect-Transistor (MOSFET) with gate boost circuit which is very simple and cost-effective. Compared to a conventional gate drive circuit, the proposed gate driver has capability of reducing the switching losses and switching time without increasing switching noise...
This paper presents the current offer and the on-going development of United Monolithic Semiconductors (UMS) regarding RF chipsets for AESA Radar. UMS has developed a wide range of RF chipset covering AESA Radar applications from L to Q-band. These products have been developed on in-house UMS GaAs PHEMT and HBT technologies offering state of the art electrical performance and high reliability level...
In this paper the common-mode noise generation mechanism and its suppression is presented for the hard-switched isolated full-bridge forward topology. Due to the extensive interleaving of primary and secondary windings, such transformers exhibit large inter-winding capacitance which is the well-known cause of large common-mode noise current in the converter. Therefore, the effect of this large coupling...
An adaptive delta-sigma modulator which can be utilized for the zero-cross switching control of resistive heaters with AC line for thermal control is proposed. By adjusting the horizon width for the cost function of the modulator control scheme according to the command signal, the modulator has both a good performance of quantum noise suppression and a wide operating range simultaneously. A numerical...
This paper provides an overview of translational or com-mutated circuits and their role in RF receivers. Insights are offered into the frequency translation of impedances, their modeling, and their application in input matching, blocker rejection, and channel selection. A new front end is also described that rejects blockers at the third harmonic of the local oscillator frequency.
This paper proposes an adaptive filtering system where a least-square algorithm and a stochastic gradient algorithm are alternately switched depending on its operational mode. The switching mechanism is quite simple and realized with a small amount of computational cost. Several numerical examples show that the resulting filter could achieve both sufficiently fast convergence and enhanced robustness...
Power factor correction (PFC) converter consumes a large part of volume of power supply. Typical switching frequency of commercial PFC converter is usually not higher than several hundred kHz. Increasing the switching frequency of PFC converter to MHz by using GaN devices can greatly reduce the size and increase power density of power supply. In order to eliminate the high turn-on loss of cascode...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.