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785 results on '"Abuelma'atti, Muhammad Taher"'

42. Analysis of the effect of radio frequency interference on the DC performance of bipolar operational amplifiers

Author

Abuelma'atti, Muhammad Taher

Subjects
Electromagnetic interference -- Research, Business, Computers, Electronics, Electronics and electrical industries
Abstract

Fourier-series approximations are obtained for the input/output characteristic of the bipolar differential amplifier with active load and the asymmetrical differential amplifier. Using these approximations, the dc voltage offset of a differential amplifier subjected to radio-frequency interference (RFI) can be studied and analytical expressions are obtained. These expressions can help in optimizing the parameters of the differential amplifier to minimize the offset voltage resulting from the RFI. Index Terms--Differential amplifiers, electromagnetic interference.

Published
2003

46. Universal CMOS current-mode analog function synthesizer

Author

Abuelma'atti, Muhammad Taher

Subjects
Function generators -- Usage, Business, Computers and office automation industries, Electronics, Electronics and electrical industries
Abstract

A CMOS integratable current-mode analog function synthesizer circuit is presented. The proposed circuit is based on approximating the required function using the first three terms of its Taylor series expansion. These approximations can be implemented by adding the output currents of a weighted current square, a weighted current amplifier (or attenuator) and a constant current. The proposed circuit can simultaneously realize 18 different mathematical functions and can be easily expanded to accommodate others. SPICE simulation results demonstrating the circuit performance are included. Index Terms--Analog CMOS, current-mode circuits, function generator.

Published
2002

47. Applications of SPICE simulation software to the study of reliability and availability in electrical engineering education

Author

Abuelma'atti, Muhammad Taher and Qamber, Isa Salman

Subjects
Electrical engineering -- Study and teaching, Markov processes, Reliability (Engineering) -- Study and teaching, Electrical engineering, Business, Education, Electronics, Electronics and electrical industries
Abstract

The effectiveness of SPICE in calculating probabilities, reliability, steady-state availability, and mean time to failure of repairable systems described by Markov models is demonstrated. Two examples are presented. The first example is a two-unit, warm standby, microcomputer system with self-reset function and repair facility. The second example is a robotic system comprising two identical robots and one safety system. In both cases, the results obtained using SPICE are compared with previously published results obtained using the Laplace transform method. Full SPICE listings are included. Index Terms--Markov model, reliability analysis, SPICE simulation.

Published
2002

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