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.
A novel input buffer for very high speed and high resolution track-andhold amplifiers has been developed in BiCMOS technology. The configuration retains the benefits of a cascode configuration in terms of distortion and adaptability to various advanced switched-emitter (source)- follower based architectures while maintaining supply requirements similar to a conventional degenerated common emitter...
The paper describes a SIMULINK® model for the complete time-domain behavioral simulation of A to D converter. In general standard CAD models are lacking in utility, since they do not model all the sources of errors. In this paper, the main parameters which affect the operations of this device are investigated and the relative non-idealities effects are modeled. The black-box description can be used...
The paper describes a new digitally programmable multi-band precise quadrature generator. The proposed approach leads to high-phase resolution joint to uniform performances in all the sub-bands of synthesis. It is easily scalable in frequency and suitable to implement any calibration technique to compensate the typical phase imbalance generated in the front end. The theory governing the quadrature...
The paper presents a wideband fully differential operational amplifier in 0.35μm SiGe technology. The circuit provides a gain of 94dB and a 1.6GHz unity gain bandwidth drawing 25 mA from 3.3V supply voltage. The circuit employs a novel class AB output stage and it was used to generate wideband low impedance voltage references for a high speed A/D converter.
This paper proposes the application of Differential Evolution with Scale Factor Local Search to optimally design the control system of a permanent-magnet synchronous motor which is part of the UPR probe, element of the more complex PAIS system. The PAIS system is an innovative Wireless Sensor Network for the environmental monitoring whose main purpose is to reduce the wildfire damages with early detection...
The paper introduces a new approach to design a multi-band distributed VCOs for modern TLC applications. The multi-band capability is achieved thanks to a novel tuning scheme based on the proposed "switched-cells tuning technique" able to fully exploit the potentialities of a distribute VCO. The design procedure is discussed. The simulated and measured characteristics of a first fully integrated...
A new fully integrated distributed voltage controlled oscillator is presented. The proposed topology allows wide tuning range and fine-coarse tuning. The design of an integrated DVCO prototype is discussed and results are reported showing good performance in terms of phase noise, tuning range and power consumption.
This paper proposes a new reduced delayed-state Kalman filter (DSKF) based algorithm to realize the speed-sensorless vector control of induction motor. This algorithm estimates the stator flux components in the stationary reference frame, using the derivatives of the stator flux components as mathematical model and the stator voltage equations as observation model. The DSKF-based algorithm accurately...
This paper proposes to use a simple stator flux oriented-sliding mode control scheme in conjunction with a novel delayed-state Kalman filter based algorithm, estimating the stator flux linkage components, to realize sensorless induction motor drives. This control scheme has closed loops of torque and stator flux without Pi-type controllers and a minimum number of controller gains is required to obtain...
This paper focuses on a simple method of achieving optimal transient torque responses in indirect rotor flux orientation (IRFO) control of induction motors having skewed rotor bars. When the rotor bars are skewed, the q-axis stator current component produces its own field which is in the direction of the rotor field due the d-axis stator current component in one-half rotor, but in opposition to the...
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.