Abstruct -A methodology for the automatic design optimization of analog integrated circuits is pr... more Abstruct -A methodology for the automatic design optimization of analog integrated circuits is presented. A non-fixed-topology approach is realized as a result of combining the optimization program OPHMAN with the symbolic simulator ISAAC. After selecting a circuit topology, the user invokes the symbolic simulator ISAAC to model the circuit. ISAAC generates both exact and simplified analytic expressions, describing the circuit's behavior. The model is then passed to the design optimization program OPTIMAN. This program is based on a generalized formulation of the analog design problem. For the selected topology, the independent design variables are automatically extracted and OPTI-MAN sizes all elements to satisfy the performance constraints, thereby optimizing a user-defined design objective. The global optimization method being applied on the analytic circuit models is simulated annealing. Practical examples show that OPTIMAN quickly designs analog circuits, closely meeting the specifications, and that it is a flexible and reliable design and exploration tool.
Page 1. A Symbolic Analysis Tool for Analog Circuit Design Automation Steven J. Seda Marc G. R. D... more Page 1. A Symbolic Analysis Tool for Analog Circuit Design Automation Steven J. Seda Marc G. R. Degrauwe Wolfgang Fichtner ' ... Therefore we have developed SYNAP, a tool that gener-ates exact and simplified design equations in symbolic form ...
This paper presents a physically based model for the metal-oxide-semiconductor (MOS) transistor s... more This paper presents a physically based model for the metal-oxide-semiconductor (MOS) transistor suitable for analysis and design of analog integrated circuits. Static and dynamic characteristics of the MOS field-effect transistor are accurately described by single-piece functions of two saturation currents in all regions of operation. Simple expressions for the transconductance-to-current ratio, the drain-to-source saturation voltage, and the cutoff frequency in terms of the inversion level are given. The design of a common-source amplifier illustrates the application of the proposed model. Index Terms-Circuit modeling, integrated circuit design, MOS analog integrated circuits, MOS devices.
Abstruct -A methodology for the automatic design optimization of analog integrated circuits is pr... more Abstruct -A methodology for the automatic design optimization of analog integrated circuits is presented. A non-fixed-topology approach is realized as a result of combining the optimization program OPHMAN with the symbolic simulator ISAAC. After selecting a circuit topology, the user invokes the symbolic simulator ISAAC to model the circuit. ISAAC generates both exact and simplified analytic expressions, describing the circuit's behavior. The model is then passed to the design optimization program OPTIMAN. This program is based on a generalized formulation of the analog design problem. For the selected topology, the independent design variables are automatically extracted and OPTI-MAN sizes all elements to satisfy the performance constraints, thereby optimizing a user-defined design objective. The global optimization method being applied on the analytic circuit models is simulated annealing. Practical examples show that OPTIMAN quickly designs analog circuits, closely meeting the specifications, and that it is a flexible and reliable design and exploration tool.
Page 1. A Symbolic Analysis Tool for Analog Circuit Design Automation Steven J. Seda Marc G. R. D... more Page 1. A Symbolic Analysis Tool for Analog Circuit Design Automation Steven J. Seda Marc G. R. Degrauwe Wolfgang Fichtner ' ... Therefore we have developed SYNAP, a tool that gener-ates exact and simplified design equations in symbolic form ...
This paper presents a physically based model for the metal-oxide-semiconductor (MOS) transistor s... more This paper presents a physically based model for the metal-oxide-semiconductor (MOS) transistor suitable for analysis and design of analog integrated circuits. Static and dynamic characteristics of the MOS field-effect transistor are accurately described by single-piece functions of two saturation currents in all regions of operation. Simple expressions for the transconductance-to-current ratio, the drain-to-source saturation voltage, and the cutoff frequency in terms of the inversion level are given. The design of a common-source amplifier illustrates the application of the proposed model. Index Terms-Circuit modeling, integrated circuit design, MOS analog integrated circuits, MOS devices.
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Papers by Ahmed Mohey