The Experts below are selected from a list of 120 Experts worldwide ranked by ideXlab platform
J.i. Sewell - One of the best experts on this subject based on the ideXlab platform.
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Efficient sensitivity analysis for large nonideal Switched Capacitor Networks
1993 IEEE International Symposium on Circuits and Systems, 1993Co-Authors: Z.q. Shang, J.i. SewellAbstract:A new sensitivity analysis method in the frequency domain is presented for nonideal Switched Capacitor Networks. The method is more general and efficient than previously published works. There are no restrictions on the number of clock phases, circuit configuration and input signal type (which can be either continuous or sample-and-hold). By performing a substantial amount of frequency-independent preprocessing, and by using adjoint network techniques, the computational costs are reduced, and a highly efficient method results. The method is implemented in a Switched Capacitor (SC) network analysis program called SCNAP4. Numerical results of the sensitivity analysis of a fifth-order elliptic low pass filter are given.
Z.q. Shang - One of the best experts on this subject based on the ideXlab platform.
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Efficient sensitivity analysis for large nonideal Switched Capacitor Networks
1993 IEEE International Symposium on Circuits and Systems, 1993Co-Authors: Z.q. Shang, J.i. SewellAbstract:A new sensitivity analysis method in the frequency domain is presented for nonideal Switched Capacitor Networks. The method is more general and efficient than previously published works. There are no restrictions on the number of clock phases, circuit configuration and input signal type (which can be either continuous or sample-and-hold). By performing a substantial amount of frequency-independent preprocessing, and by using adjoint network techniques, the computational costs are reduced, and a highly efficient method results. The method is implemented in a Switched Capacitor (SC) network analysis program called SCNAP4. Numerical results of the sensitivity analysis of a fifth-order elliptic low pass filter are given.
O Oliaei - One of the best experts on this subject based on the ideXlab platform.
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numerical algorithm for noise analysis of Switched Capacitor Networks
IEEE Transactions on Circuits and Systems I-regular Papers, 2003Co-Authors: O OliaeiAbstract:An algorithm for computerized noise analysis of Switched-Capacitor Networks is presented. The analysis is entirely performed in the frequency domain and the passage from the continuous-time domain to the discrete-time domain is accomplished through numerical integration. The algorithm offers the capability of analyzing circuits incorporating correlated double-sampling or more generally multiple sampling. Numerical calculations consist of standard linear noise analysis and post-processing of the data to account for sample-and-hold and tracking effects. The assumptions fundamental to the analysis are fast and complete charge transfer and also stationarity or cyclostationarity of continuous-time noise sources. Numerical results for stray-insensitive and correlated double-sampling integrators are provided to illustrate the algorithm performance.
Muhammet Koksal - One of the best experts on this subject based on the ideXlab platform.
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investigation of the effects of nonideal situations on the characteristics of Switched Capacitor Networks
Mediterranean Electrotechnical Conference, 1994Co-Authors: T Kilci, Muhammet KoksalAbstract:A complete and general technique is presented for the computer-aided analysis of linear circuits containing periodically operated switches (POS) considering the applications to Switched-Capacitor Networks (SCN) due to nonideal behaviour of the integrated components. The prepared computer program formulates all necessary equations for the analysis namely the state, the output, and switching equations. In addition, the results are expressed in time domain as well as in the form of a generalized phase transfer matrix. From this matrix, an overall transfer function which is originally defined on the base of the time-varying system function, is derived. The effects on the frequency response of SCN due to the duty cycle variation of the switches for ideal and nonideal SCN are investigated. >
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analysis of the effect of periodic fluctuation of switching instants on the transfer characteristics of Switched Capacitor Networks
International Journal of Circuit Theory and Applications, 1994Co-Authors: A Nacaroglu, Muhammet KoksalAbstract:A complete description of Switched Capacitor Networks which include an arbitrary number of non-uniform input and output phases is presented on the basis of the generalized phase transfer matrix by extending a previously introduced state space approach. the input frequency harmonic (main harmonic) of the periodically time-varying system transfer function is obtained and the effect of periodic fluctuation of the switching instants on the transfer characteristics of the Switched Capacitor filters is analysed. This procedure also facilitates the evaluation of the effects of non-uniform multiphase switching. Application of the results to a Switched Capacitor filter shows that the frequency response is very sensitive to the fluctuation of switching instants.
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a new feasible method for the design of stray insensitive optimum Switched Capacitor Networks
International Journal of Circuit Theory and Applications, 1993Co-Authors: A Nacaroglu, Muhammet KoksalAbstract:On the basis of signal flow graphs a general method is described for the design of stray-insensitive Switched Capacitor Networks. to be able to choose the optimum one, the method involves the search of all possible topologies for the specially formed signal flow graph of the given z-domain transfer function and is easily implemented by digital computer.
K Suyama - One of the best experts on this subject based on the ideXlab platform.
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noise analysis of ideal Switched Capacitor Networks
IEEE Transactions on Circuits and Systems I-regular Papers, 1999Co-Authors: L Toth, I Yusim, K SuyamaAbstract:This paper presents a method for computing the noise power spectral density (PSD) in Switched-Capacitor Networks, Explicit formulas are developed for both white and 1/f noise sources. The 1/f noise is handled directly in the formulation without having to approximate its PSD by using a noise shaping filter. The technique eliminates the need for computing eigenvalues or matrix exponentials as well as solving bilateral matrix equations, and thereby leads to a numerically efficient algorithm. The noise sources considered here are the ON-resistances of MOS switches and the input referred noise PSD's of operational amplifiers (opamps). Experiments are carried out to demonstrate the validity of the formulation for both white and 1/f input noise.
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efficient noise analysis of ideal Switched Capacitor Networks with experimental verification
International Symposium on Circuits and Systems, 1997Co-Authors: L Toth, I Yusim, K SuyamaAbstract:An exact method is outlined for computing the noise power spectral density (PSD) in "nearly" ideal Switched Capacitor Networks (SCNs). Explicit formulas are presented for both white and 1/f input noise. The 1/f noise source is handled directly in the formulation without having to approximate its PSD using a noise shaping filter. The technique avoids computing eigenvalues or matrix exponentials, as well as solving bilateral matrix equations. The proposed formulation is based on the charge state variable characterization. Thus, it is directly adaptable to the ideal SCN simulator such as SWITCAP. The formulation is presented by emphasizing on an operational amplifier (opamp) modeled by finite gain and pole frequency, and its input-referred noise PSD. An experiment is presented to demonstrate the validity of the proposed formulation.
