Negative feedback

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Negative feedback occurs when the output of a system acts to oppose changes to the input of the system, with the result that the changes are attenuated. (Wikipedia.org)






Conferences related to Negative feedback

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2020 IEEE International Conference on Plasma Science (ICOPS)

IEEE International Conference on Plasma Science (ICOPS) is an annual conference coordinated by the Plasma Science and Application Committee (PSAC) of the IEEE Nuclear & Plasma Sciences Society.


2019 41st Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC)

The conference program will consist of plenary lectures, symposia, workshops andinvitedsessions of the latest significant findings and developments in all the major fields ofbiomedical engineering.Submitted papers will be peer reviewed. Accepted high quality paperswill be presented in oral and postersessions, will appear in the Conference Proceedings and willbe indexed in PubMed/MEDLINE & IEEE Xplore


2019 IEEE 17th International Conference on Industrial Informatics (INDIN)

Industrial information technologies


2019 IEEE 58th Conference on Decision and Control (CDC)

The CDC is recognized as the premier scientific and engineering conference dedicated to the advancement of the theory and practice of systems and control. The CDC annually brings together an international community of researchers and practitioners in the field of automatic control to discuss new research results, perspectives on future developments, and innovative applications relevant to decision making, systems and control, and related areas.The 58th CDC will feature contributed and invited papers, as well as workshops and may include tutorial sessions.The IEEE CDC is hosted by the IEEE Control Systems Society (CSS) in cooperation with the Society for Industrial and Applied Mathematics (SIAM), the Institute for Operations Research and the Management Sciences (INFORMS), the Japanese Society for Instrument and Control Engineers (SICE), and the European Union Control Association (EUCA).


2019 IEEE International Conference on Systems, Man and Cybernetics (SMC)

2019 IEEE International Conference on Systems, Man, and Cybernetics (SMC2019) will be held in the south of Europe in Bari, one of the most beautiful and historical cities in Italy. The Bari region’s nickname is “Little California” for its nice weather and Bari's cuisine is one of Italian most traditional , based of local seafood and olive oil. SMC2019 is the flagship conference of the IEEE Systems, Man, and Cybernetics Society. It provides an international forum for researchers and practitioners to report up-to-the-minute innovations and developments, summarize state­of-the-art, and exchange ideas and advances in all aspects of systems science and engineering, human machine systems and cybernetics. Advances have importance in the creation of intelligent environments involving technologies interacting with humans to provide an enriching experience, and thereby improve quality of life.


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Periodicals related to Negative feedback

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Antennas and Wireless Propagation Letters, IEEE

IEEE Antennas and Wireless Propagation Letters (AWP Letters) will be devoted to the rapid electronic publication of short manuscripts in the technical areas of Antennas and Wireless Propagation.


Applied Superconductivity, IEEE Transactions on

Contains articles on the applications and other relevant technology. Electronic applications include analog and digital circuits employing thin films and active devices such as Josephson junctions. Power applications include magnet design as well asmotors, generators, and power transmission


Audio, Speech, and Language Processing, IEEE Transactions on

Speech analysis, synthesis, coding speech recognition, speaker recognition, language modeling, speech production and perception, speech enhancement. In audio, transducers, room acoustics, active sound control, human audition, analysis/synthesis/coding of music, and consumer audio. (8) (IEEE Guide for Authors) The scope for the proposed transactions includes SPEECH PROCESSING - Transmission and storage of Speech signals; speech coding; speech enhancement and noise reduction; ...


Automatic Control, IEEE Transactions on

The theory, design and application of Control Systems. It shall encompass components, and the integration of these components, as are necessary for the construction of such systems. The word `systems' as used herein shall be interpreted to include physical, biological, organizational and other entities and combinations thereof, which can be represented through a mathematical symbolism. The Field of Interest: shall ...


Biomedical Engineering, IEEE Transactions on

Broad coverage of concepts and methods of the physical and engineering sciences applied in biology and medicine, ranging from formalized mathematical theory through experimental science and technological development to practical clinical applications.


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Most published Xplore authors for Negative feedback

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Xplore Articles related to Negative feedback

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1/3-inch Interline Transfer CCD Image Sensor With Negative Feedback 94dB Dynamic Range Charge Detector

1991 IEEE International Solid-State Circuits Conference. Digest of Technical Papers, 1991

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Integrated selective amplifiers for RF

1968 IEEE International Solid-State Circuits Conference. Digest of Technical Papers, 1968

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Three-part FLL system for exact frequency stabilization

2000 2nd International Conference. Control of Oscillations and Chaos. Proceedings (Cat. No.00TH8521), 2000

Three-part frequency locked-loop (FLL) system with identical partial FLLs and connections between them is considered. The mathematical model derived is applicable for any filters and discriminators. A number of new interesting results is derived. Essentially new, in comparison with an ordinary single FLL, is the opportunity of exact frequency stabilization in the 3-part system, allowing us to construct system with ...


Feedback and nonlinear distortion

Proceedings of the IEEE, 1981

The effect of linear negative feedback on the normalized coefficients of a power series is evaluated. For large loop gain, desensitization tends to proceed with the power of the particular closed-loop term.


Stability and Time-Delay Modeling of Negative Feedback Loops

Proceedings of the IEEE, 2008

Negative feedback loops are a common cellular motif underlying many important gene regulation pathways, and therefore a clear understanding of their dynamics is important for the study of gene regulation. Here we analyze the linear stability of negative feedback loops with and without explicit time delays. When the degradation rates of each loop component are identical, we derive the analytical ...


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Educational Resources on Negative feedback

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IEEE-USA E-Books

  • 1/3-inch Interline Transfer CCD Image Sensor With Negative Feedback 94dB Dynamic Range Charge Detector

    None

  • Integrated selective amplifiers for RF

    None

  • Three-part FLL system for exact frequency stabilization

    Three-part frequency locked-loop (FLL) system with identical partial FLLs and connections between them is considered. The mathematical model derived is applicable for any filters and discriminators. A number of new interesting results is derived. Essentially new, in comparison with an ordinary single FLL, is the opportunity of exact frequency stabilization in the 3-part system, allowing us to construct system with precise frequency stabilization without constant current amplifiers with large amplification.

  • Feedback and nonlinear distortion

    The effect of linear negative feedback on the normalized coefficients of a power series is evaluated. For large loop gain, desensitization tends to proceed with the power of the particular closed-loop term.

  • Stability and Time-Delay Modeling of Negative Feedback Loops

    Negative feedback loops are a common cellular motif underlying many important gene regulation pathways, and therefore a clear understanding of their dynamics is important for the study of gene regulation. Here we analyze the linear stability of negative feedback loops with and without explicit time delays. When the degradation rates of each loop component are identical, we derive the analytical solution of the condition of marginal stability. In the most general case, when the degradation rates of each component differ, we derive a novel expansion of the condition of marginal stability in terms of the geometric mean and variance of the degradation rates. We use these results to demonstrate how the mathematical representation of a negative feedback loop can be simplified such that the stability characteristics are maintained. Finally we apply these results to study the stability structure of the p53-Mdm2 feedback loop. By simplifying a model involving nuclear and cytoplasmatic molecular species of mdm2 mRNA and Mdm2 protein to a model involving only nuclear components and a time delay (which summarizes transcriptional, nuclear import and export, and translational time scales), we demonstrate how our methods allow for an elucidation of the dynamic instabilities recently observed experimentally in the p53-Mdm2 system as the transcription of p53 changes from low to middle to high rates.

  • Negative Feedback System and Circuit Design

    The negative feedback amplifier structure using an ideal integrator is derived. The time domain and frequency domain descriptions of the integrator are discussed. The response of the negative feedback amplifier in the time and frequency domains is analyzed. From these general conclusions are drawn about the behavior of negative feedback amplifiers. The ideal integrator is realized using controlled sources and passive elements. This realization clearly shows the cause for finite dc gain in real opamps. The effects of finite dc gain are analyzed. Relationships between amplifier specifications such as speed and accuracy and opamp parameters such as unity gain frequency and dc gain are derived. Methods of increasing the dc gain to improve accuracy are discussed. These lead to multistage amplifiers. The response of such systems in time and frequency domains are analyzed. It is shown that multistage amplifiers are potentially unstable. Stability conditions for negative feedback systems are discussed. The gain around the negative feedback loop is computed. The significance of loop gain is illustrated. Stability criteria related to the loop gain such as phase margin and Nyquist's criterion are discussed. Frequently used criteria such as phase margin are clarified. Multistage amplifiers are essential for realizing high accuracy. Different techniques of realizing high gains while retaining stability-increasing the output resistance, miller compensation, and feedforward compensation are shown. There are various opamp architectures: folded/telescopic cascode; two stage miller compensated; feedforward compensated; and three stage. The design procedures for the two stage miller compensated opamp, the feedforward compensated opamp, and the three stage opamp are shown. These opamps will be compared in terms of their performance parameters-bandwidth, noise, power dissipation, slew rate, output swing. The design of a 350MHz bandwidth continuous-time active-RC filter using feedforward compensated opamps is shown. Measurement results from chips designed at IIT Madras illustrate the benefits of the feed-forward opamp architecture for low power applications. The design details of a three stage opamp with a DC gain exceeding 100dB is shown. The constraints on the design of different stages are evaluated. Simulation results of the opamp illustrate its suitability for a high precision application.

  • Approximating delay elements by feedback

    A procedure for obtaining a proper rational approximant of the transfer function of a delayer is suggested. In particular, the step response of the unity-feedback system with the delayer in the direct path is first approximated by truncating the Fourier series expansion of its periodic component, and then the corresponding direct-path rational transfer function is derived, thus arriving at a stable Blaschke product.

  • Order determination for frequency compensation of negative-feedback systems

    To maximize the bandwidth of dedicated negative feedback amplifiers by passive frequency compensation, the order of the amplifier needs to be known. Here a method is introduced to determine the order of a circuit with negative feedback. It is shown that the slim of poles in the negative feedback loop, i.e. the loop poles, can be used to determine the order of the amplifier. These loop poles, can be found relatively easily from the circuit diagram and thus the order of the circuit is also relatively easily found.

  • A wideband, fixed gain BiMOS amplifier

    Circuits which achieve precise gains without the use of negative feedback have recently become of interest because of their simplicity and large bandwidth. A new circuit architecture is proposed for precision, fixed gain amplifiers using an open loop approach. Two circuit implementations using the new architecture are presented. The first is constructed as a 9 /spl times/ 12 mil cell on an N-well CMOS process with a combination of MOS and bipolar devices. The second is constructed on a standard linear bipolar process using a semicustom array.<<ETX>>

  • Corrective Networks for Feedback Circuits

    Design information is given or simplified corrective networks for application with negative-feedback devices. The corrective networks are applied to control the cutoff attenuation characteristic of the feedback transmission loop to prevent oscillation. To provide a design factor of safety against oscillation, the cutoff transmission characteristic should not attenuate at a rate of more than 10 decibels per octave. Corrective networks are required to achieve this attenuation rate.



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