Circuit Topology Research Papers - Academia.edu (original) (raw)

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- Engineering, Power Consumption, Process Variation, Comparative Analysis

This paper describes a novel down-converter architecture for radio receivers and for polarimetric radar systems. The mixing unit configuration is based on two 90/spl deg/ single balanced mixers, associated in anti-phase, to obtain wide-bandwidth differential IF signals. For analog receivers, the terminals of each of the mixing units are connected to produce single RF and LO signals. This is as opposed to polarimetric systems, where one LO and two RF signals are present. The broadband nature of the differential IF signals suggests that the proposed topology eliminates the need of either passive baluns or active baluns needed to produce 0/spl deg/ and 180/spl deg/ phase-shifted signals.

- by Solon Spiegel
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- Impedance Matching, Radio Frequency, GNSS receivers, Circuit Topology
- by Luca Benini
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- Computer Aided Design, Topology, Computer Hardware, Comparative Study
- by shouli yan
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- Circuits and Systems, Simulation, Process Simulation, Feedforward
- by Calogero Pace and +1
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- Spectral analysis, Feedback, Frequency, Network Topology
- by Hermann Schumacher
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- Signal Analysis, Dispersion, Frequency-domain analysis, Mmic

In this paper, a high efficiency C-band GaN HEMT high power amplifier with internal harmonic manipulation circuits is presented. We employed a new circuit topology for simultaneous high efficiency matching at both fundamental and 2nd-harmonic frequencies. The developed GaN HEMT amplifier has achieved over 57% drain efficiency (50% power-added-efficiency) with 100 W output power at C-band. This is the state-of-the-art efficiency of GaN HEMT high power amplifier at C-band to the best of our knowledge.

- by Ade Chaky
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- Harmonic Analysis, Power Generation, Frequency, High Electron Mobility Transistors

In this paper a novel design procedure for lumped element Marchand baluns is proposed. An analysis is performed on the balun structure in order to determine the conditions for ideal balun performance in terms of the lumped element values. The analysis is verified by two broadband designs centered around 22.75 GHz and differing only in terms of their impedance transformation

- by Tom Johansen
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- Frequency, Impedance Matching, Seismic analysis and design, Bandwidth
- by Harikrishnan Ramiah
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- High Frequency, Radio Frequency, Power Supply, Chip
- by R. Strzelecki
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- Lattices, Voltage, Network Topology, Circuit Topology
- by Johann Kolar
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- Engineering, Electromagnetic Interference, Control Systems, High Frequency
- by Alexandru Ivascu
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- High Frequency, Resonance, Voltage, Experimental Tests
- by Oscar Lopez
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- Earth, Electromagnetic Radiation, Leakage Current, Low Power
- by Drazen Jurisic and +1
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- Sensitivity Analysis, Operational Transconductance Amplifier, Negative Feedback, Impedance
- by Alfonso Carlosena
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- Analog Circuits, Low Power Design, Low Power, Low Power Electronics
- by Francisco Freijedo
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- Earth, Electromagnetic Radiation, Leakage Current, Low Power
- by Ir. Mohd Rasid Osman
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- Power Generation, Frequency, Degeneration, TRANSMITTERS
- by David Geer
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- System on Chip, Chip, Network on chip, Network Topology
- by Milan Jovanovic
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- Performance Evaluation, Power Generation, Microcomputers, High Power
- by Sourav Samanta
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- Quantum Computing, Computer Aided Design, Quantum Theory, Semiconductor Devices
- by Alfio Dario Grasso
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- Computer Aided Design, CAD, Operational Transconductance Amplifier, Frequency

This paper presents the realization of third-order low-pass (LP) active-RC filters using new simplified Leap-Frog (LF) topology. It has the reduced number of components, reduced complexity and straightforward design procedure. It is well known that the passive ladder-RLC filters, terminated with equal resistors at both ends have very low sensitivity to component tolerances in the pass-band. If active-RC filter are

- by Drazen Jurisic
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- Electrical Engineering, Monte Carlo, Sensitivity Analysis, Monte Carlo Methods

The matrix converter is an array of controlled semiconductor switches that connects directly the three-phase source to the three-phase load. This converter has several attractive features that have been investigated in the last two decades. In the last few years, an increase in research work has been observed, bringing this topology closer to the industrial application. This paper presents the state-of-the-art view in the development of this converter, starting with a brief historical review. An important part of the paper is dedicated to a discussion of the most important modulation and control strategies developed recently. Special attention is given to present modern methods developed to solve the commutation problem. Some new arrays of power bidirectional switches integrated in a single module are also presented. Finally, this paper includes some practical issues related to the practical application of this technology, like overvoltage protection, use of filters and ride-through capability

- by jose Rodriguez
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- Engineering, History, Modulation, Industrial electronics
- by Simone Buso and +1
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- High Frequency, Noise reduction, Circuit Complexity, Reactive Power
- by jose ku
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- Signal Processing, Circuits and Systems, Quantization, Distortion

A monolithic bipolar variable-gain amplifier with 25-dB maximum differential gain and over 30 dB of gain-control range operating in the DC to 1-GHz frequency range is described. The circuit has a 9.3-dB noise figure from a 50 Ω source, an output third-order intercept of +13.5 dBm at high gain, and an input third-order intercept of +6 dBm at low gain. The gain varies linearly as the gain-control voltage varies from 0 to 1 V and the gain is insensitive to supply and temperature variations for a given gain-control setting. Power consumption is 225 mW from a single 5-V supply

- by Robert Meyer
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- Power Consumption, Temperature, Frequency, Photonic Band Gap Materials

In this paper a new basic cell for low-power and/or low-voltage operation is identified. It is shown that different versions of this cell, called "flipped voltage follower", have been used in the past for different applications. New... more

- by Sanaa Sharafeddine
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- Routing, Scanning Probe Microscopy, Ad Hoc Networks, Wireless Technology

This paper presents a topological method for identifying multiple static translinear loops using a graphical representation. It is found that the translinear principle has a new formulation based on graph theory concepts and it is applied to circuits containing BJTs and MOS transistors. In addition, it introduces the concept of translinear circuit for representing a translinear loop. The types of interaction between translinear loops are studied and its properties are established. The method is illustrated with a generic example

- by Dr. Rafael Vargas-Bernal
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- Graph Theory, Circuits and Systems, Graphical Models, Voltage
- by Mahmoud Abdoallah
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- Noise, Design Space Exploration, Accuracy, Mathematical Model
- by Dimitris Karadimas
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- Computer Architecture, Calibration, Voltage, Linearity
- by Milan Jovanovic
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- Engineering, Energy, Control Systems, High Frequency

Analysis of new converter topologies, large converters, multi-converter systems, line commutated converters and electrical drive systems requires an appropriate global simulation tool. Because the dynamic model of AC machines is very complex due to the nonlinearities of the system, it is necessary to simulate the whole system containing an AC machine. A user friendly simulator must be able to handle complex systems as such electrical drives by dividing them in small interconnected sub-systems (converter-machine-regulator) assembled in a modular structure. The interconnection of these sub-systems must be done in a simple manner, without additional programming, using a graphic interface. The aim of this paper is to present a new interactive power electronic systems simulation package SIMUSEC “SIMUlation des Systemes Electrotechniques en Commutation”, developed in the SIMULINK environment. This package permits simulation of power converters feeding passive loads or electrical machines either in open loop or in closed loop configurations. It also permits simulation of interaction between the converter-machine setups and between converters in a multiconverter system in order to study the conducted emissions. The built-in functions and tool boxes of SIMULINK facilitate the design and the analysis of high performance AC drive systems using this package

- by Andre Pittet
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- Power Electronics, Simulation, Complex System, Graphic User Interface Design

In this paper a novel online simulator is introduced that is integrated into the educational project iPES which is a free collection of Java applets for educational purpose. iPES has been translated into 12 languages and has currently more than 10, 000 visits per month. The novel online simulator is optimized for power electronics, easy to use, and allows unlimited

- by Slobodan Cuk
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- Power Electronics, Methodology, Topology, High Frequency
- by Drazen Jurisic
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- Electrical Engineering, Monte Carlo, Sensitivity Analysis, Monte Carlo Methods
- by Murat Ayaz
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- Linear Model, Equivalent Circuit, Steady state, Simulation Study
- by Siva Sankar
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- Reactive Power, Voltage, Pulse Width Modulation, Matrix Converter
- by John Leete
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- Differential Equations, Impedance Matching, Radio Frequency, Noise Figure
- by Giorgos Papafotiou
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- Optimal Control, Control, Automatic Control, Dc-Dc Boost Converter
- by Kaushik Sengupta
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- Resonance, Frequency Synthesizer, Chip, Frequency synthesizers
- by Payam Heydari
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- Communication System, Radio Frequency, Circuit Design, Gain
- by Carlos Branco
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- Engineering, Low Frequency, High Frequency, Industrial

A new non-isolated boost converter with high voltage gain is proposed on this work. This converter is suitable for applications with a high voltage gain between the input and the output. In this converter, for a given duty cycle, the output to input voltage ratio can be raised by adding transformer turns. Another important feature of this converter is the lower blocking voltage across the controlled switches compared to similar circuits, which allows the utilization of MOSFETs switches with lower conduction resistances RDS(on). In order to verify the feasibility of this topology; principle of operation, theoretical analysis, and experimental waveforms are shown for a 1 kW assembled prototype

- by Grover Torrico
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- Educational Technology, Stress, High Voltage, Industrial
- by D. Navarro and +1
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- Engineering, Power Electronics, Control Systems, Hardware
- by Sam Ben-Yaakov
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- Theoretical Analysis, Low Power Electronics, Power Supply, Diode

Power supply rejection ratio (PSRR) is an extremely important quality figure for operation amplifiers (op-amps). Especially in mixed analog-digital ICs, the analog circuit must be able to discriminate against the digital noise coupled through the power supply lines. The authors address the analysis and simulation of PSRR of fully differential op-amps. It is shown that the PSRR of a fully differential circuit is affected by circuit asymmetry resulting from manufacturing variations. Analysis and Monte-Carlo simulations are shown for a novel high slew-rate fully-differential folded cascode op-amp

- by Rick Carley
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- Analog Circuits, Monte Carlo Simulation, Monte Carlo Simulations, Power Supply
- by Grover Torrico
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- Diodes, PESC, Circuit Topology, Switches