Single-input three-output dual-mode universal biquad realization based on floating-current-source building blocks

2017 ◽  
Author(s):  
Pratya Mongkolwai ◽  
Sumalee Unhavanich ◽  
Worapong Tangsrirat
Keyword(s):  
Current Source ◽  
Building Blocks ◽  
Dual Mode ◽  
Floating Current Source ◽  
Single Input

scholarly journals Design of an Ultra-Low Voltage Bias Current Generator Highly Immune to Electromagnetic Interference

2021 ◽  
Vol 11 (1) ◽  
pp. 6
Author(s):  
Orazio Aiello
Keyword(s):  
Integrated Circuits ◽  
Electromagnetic Interference ◽  
Low Voltage ◽  
Current Source ◽  
Building Blocks ◽  
Cmos Technology ◽  
Threshold Region ◽  
Output Current ◽  
Current Generator ◽  
Technology Process

The paper deals with the immunity to Electromagnetic Interference (EMI) of the current source for Ultra-Low-Voltage Integrated Circuits (ICs). Based on the properties of IC building blocks, such as the current-splitter and current correlator, a novel current generator is conceived. The proposed solution is suitable to provide currents to ICs operating in the sub-threshold region even in the presence of an electromagnetic polluted environment. The immunity to EMI of the proposed solution is compared with that of a conventional current mirror and evaluated by analytic means and with reference to the 180 nm CMOS technology process. The analysis highlights how the proposed solution generates currents down to nano-ampere intrinsically robust to the Radio Frequency (RF) interference affecting the input of the current generator, differently to what happens to the output current of a conventional mirror under the same conditions.

Decomposition Strategies for the Synthesis of Single Input-Single Output and Dual Input-Single Output Compliant Mechanisms

2007 ◽  
Author(s):  
Charles Kim
Keyword(s):  
Compliant Mechanisms ◽  
Compliant Mechanism ◽  
Single Point ◽  
Building Blocks ◽  
New Method ◽  
Single Input Single Output ◽  
Single Output ◽  
Alternative Method ◽  
Decomposition Strategies ◽  
Single Input

In this paper a new method for the synthesis of compliant mechanism topologies is presented which involves the decomposition of motion requirements into more easily solved sub-problems. The decomposition strategies are presented and demonstrated for both single input-single output (SISO) and dual input-single output (DISO) planar compliant mechanisms. The methodology makes use of the single point synthesis (SPS) which effectively generates topologies which satisfy motion requirements at one point by assembling compliant building blocks. The SPS utilizes compliance and stiffness ellipsoids to characterize building blocks and to combine them in an intelligent manner. Both the SISO and DISO problems are decomposed into sub-problems which may be addressed by the SPS. The decomposition strategies are demonstrated with illustrative example problems. This paper presents an alternative method for the synthesis of compliant mechanisms which augments designer insight.

scholarly journals A New Low-Voltage Low-Power Dual-Mode VCII-Based SIMO Universal Filter

Electronics ◽  
2019 ◽  
Vol 8 (7) ◽  
pp. 765 ◽  
Author(s):  
Leila Safari ◽  
Gianluca Barile ◽  
Giuseppe Ferri ◽  
Vincenzo Stornelli
Keyword(s):  
Low Power ◽  
Transfer Functions ◽  
Low Voltage ◽  
Supply Voltage ◽  
Building Blocks ◽  
Cmos Technology ◽  
Universal Filter ◽  
Dual Mode ◽  
Input Multiple Output ◽  
Low Pass

In this paper, a new low-voltage low-power dual-mode universal filter is presented. The proposed circuit is implemented using inverting current buffer (I-CB) and second-generation voltage conveyors (VCIIs) as active building blocks and five resistors and three capacitors as passive elements. The circuit is in single-input multiple-output (SIMO) structure and can produce second-order high-pass (HP), band-pass (BP), low-pass (LP), all-pass (AP), and band-stop (BS) transfer functions. The outputs are available as voltage signals at low impedance Z ports of the VCII. The HP, BP, AP, and BS outputs are also produced in the form of current signals at high impedance X ports of the VCIIs. In addition, the AP and BS outputs are also available in inverting type. The proposed circuit enjoys a dual-mode operation and, based on the application, the input signal can be either current or voltage. It is worth mentioning that the proposed filter does not require any component matching constraint and all sensitivities are low, moreover it can be easily cascadable. The simulation results using 0.18 μm CMOS technology parameters at a supply voltage of ±0.9 V are provided to support the presented theory.

Special Issue on Cybernetic City Transport Systems and Technologies

2010 ◽  
Vol 22 (6) ◽  
pp. 683-684
Author(s):  
Ljubo Vlacic ◽  
Toshio Fukuda ◽  
Yasuhisa Hasegawa ◽  
Michel Parent
Keyword(s):  
Building Blocks ◽  
Detection Algorithm ◽  
Operational Performance ◽  
Transport Systems ◽  
Shape Estimation ◽  
Sustainable Mobility ◽  
Dual Mode ◽  
Road Infrastructure ◽  
Traffic Lights ◽  
Road Testing

The publication of this issue was driven by the vision that, in the not too distant future, Cybernetic Transport Systems (CTS) will be seen on city roads and dedicated infrastructures. TheWorld Council for Sustainability has projected that CTS will be seen in cities in as early as 2030 (Mobility 2030: Meeting the Challenges to Sustainability; World Business Council for Sustainable Mobility, July 2004). CTS are based on fully automated driverless urban road vehicles (CyberCars). They can also be based on Dual-Mode Vehicles (DMV) - conventional vehicles with Advanced Driver Assistance Technology (ADAT) and capable of driverless driving, on request by a driver. ADAT covers electronic and software products that assist drivers in driving. DMV assumes that a driver is not in control of the vehicle at all times but is fully responsible for vehicle operation throughout. Both CyberCars and DMVs co-operate through vehicle-to-vehicle and vehicle-to-infrastructure communication links thus enabling cybernetic transport to achieve higher traffic flows and improve network efficiency. Main CTS building blocks are CyberCars and/or Dual Mode Vehicles, Road Infrastructure Elements and CTS Traffic Management & Control Centre. These four blocks are interconnected, integrated and made interoperable through Communication Architecture and Protocols, and Operational Safety & Reliability Certification Procedures. A variety of CTS concepts have been prototyped and evaluated within the scope of projects such as: (i) Toyota’s Intelligent Multimode Transportation System (http://www.expo2005.or.jp/en/technology/imts.html); (ii) the CyberCars (http://www.cybercars.org); CyberMove (http://www.cybermove.org); (iii) CityMobil (http://www.citymobil-project.eu/); (iv) Safespot (http://www.safespot-eu.org/); (v) CVIS (http://www.cvisproject.org); (vi) Group Rapid Transit (http://www.2getthere.eu/Group Transit). The figure above shows a CTS prototyped by the CyberCars-2 Project Consortium. An extensive infield, i.e., on-road testing of operational performance of co-operative cybernetic transport solutions was conducted at several road tracks, the last being held at La Rochelle, France, in September 2008. This issue addresses a broad spectrum of theoretical and implementational topics related to CTS development and deployment including: • Cooperative Cybernetic Transport System Architecture • Real-time Decision Making by driverless vehicles • On-road testing of operational performance of CTS • Road-Crossing Landmarks Detection algorithm • Landmark Shape Detection algorithm • Road Shape Estimation algorithm, and • Vehicle-to-road infrastructure (traffic lights) communication solutions. In addition, this issue presents papers that deal with ADAT and analyses: • Acceptability and Usability of a Parking Assistance System for Elderly Drivers • Relationships between Car Accidents and a Driver’s Physiology and Psychology • 2D Localization in Urban Environment, and • Sustainability and Reusability aspects of Common Robotic Technology components. We hope you enjoy the issue!

scholarly journals Continuous Modeling of a Multi-Link Flexible Transmission

2008 ◽  
Vol 15 (2) ◽  
pp. 163-177 ◽  
Author(s):  
Irit Peled ◽  
Yoram Halevi
Keyword(s):  
Transfer Functions ◽  
Building Blocks ◽  
Simulation Software ◽  
Infinite Dimension ◽  
Physical Insight ◽  
Single Input ◽  
Continuous Modeling ◽  
Rational Expressions ◽  
Generalized State ◽  
Function Matrix

The problem of dynamic, infinite dimension, modeling of a transmission is considered. An accurate Laplace transfer function matrix of the system that consists of flexible shafts connected by gears that are either rigid or flexible is found. The first step is deriving a set of single input, infinite dimension, transfer functions for a single uniform link. The building blocks of those transfer functions are time delays, representing the wave motion, and low order rational expressions, representing the boundary phenomena. The next step is combining these individual transfer functions into an overall model of the transmission, by means of the link reaction approach that makes use of the geometric relationships and reaction moments between neighboring links. The outcome is a generalized dynamic model with the moments in the gear pairs as the generalized state vector. The explicit and highly structured form of the transfer functions allows physical insight into the system, exact calculation of natural frequencies and the construction of exact simulation schemes built from standard blocks that are available in multi-purpose simulation software.

scholarly journals A Novel Stability Improvement Strategy for a Multi-Inverter System in a Weak Grid Utilizing Dual-Mode Control

Energies ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 2144 ◽  
Author(s):  
Ming Li ◽  
Xing Zhang ◽  
Wei Zhao
Keyword(s):  
Current Source ◽  
Voltage Source ◽  
Output Current ◽  
Dual Mode ◽  
Improvement Strategy ◽  
Distributed Generations ◽  
Mode Control ◽  
Loop Transfer Function ◽  
Grid Impedance ◽  
Control Scheme

Due to the increasing penetration of distributed generations (DGS) and non-negligible grid impedance, the instability problem of the multi-inverter system operating in current source mode (CSM) is becoming serious. In this paper, a closed-loop transfer function model of such a multi-inverter system is established, by which it is concluded that output current resonance will occur with the increase in the grid impedance. In order to address this problem, this paper presents a novel dual-mode control scheme of multiple inverters: one inverter operating in CSM will be alternated into voltage source mode (VSM) if the grid impedance is high. It is theoretically proved that the coupling between the inverters and the resonance in the output current can be suppressed effectively with the proposed scheme. Finally, the validity of the proposed theory is demonstrated by extensive simulations and experiments.

Transfer Function Modeling of a Flexible Gear Train

2006 ◽  
Author(s):  
Irit Peled ◽  
Yoram Halevi
Keyword(s):  
Transfer Function ◽  
Transfer Functions ◽  
Dynamical Behavior ◽  
Building Blocks ◽  
Gear Train ◽  
Infinite Dimension ◽  
Control Laws ◽  
Physical Insight ◽  
Single Input ◽  
Rational Expressions

The problem of dynamic, infinite dimension, modeling of a gear train is considered. It includes derivation of the accurate, Laplace transfer function matrix of the system that consists of flexible shafts, individually governed by the wave equation, connected by gears that are either rigid or flexible. The first step is deriving a set of single input, infinite dimension, transfer functions for a single uniform link. The building blocks of those transfer functions are time delays, representing the wave motion, and low order rational expressions, representing the boundary phenomena. The next step is constructing a model for the multi-link gear train system, by using the natural feedback within the system to arrive at a generalized dynamic model. This explicit and highly structured form of transfer functions, allows physical insight into the system, which is lacking in finite dimension approximations. It was used for the analysis of the dynamical behavior of the gear train and may also be used for the design of dedicated control laws.

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