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Highfrequency distortion analysis of analog integrated circuits
 IEEE Trans. Circuits Syst. II, Analog Digit. Signal Process
, 1999
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Symbolic Analysis of Large Analog Integrated Circuits By Approximation During Expression Generation
, 1994
"... A novel algorithm is presented that generates approximate symbolic expressions for smallsignal characteristics of large analog integrated circuits. The method is based upon the approximation of an expression while it is being computed. The CPU time and memory requirements are reduced drastically wi ..."
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Cited by 9 (1 self)
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A novel algorithm is presented that generates approximate symbolic expressions for smallsignal characteristics of large analog integrated circuits. The method is based upon the approximation of an expression while it is being computed. The CPU time and memory requirements are reduced drastically with regard to previous approaches, as only those terms are calculated which will remain in the final expression. As a consequence, the maximum circuit size amenable to symbolic analysis has largely increased. The simplification procedure explicitly takes into account variation ranges of the symbolic parameters to avoid inaccuracies of conventional approaches which use a single value. The new approach is also able to take into account mismatches between the symbolic parameters. INTRODUCTION Symbolic circuit analysis refers to the calculation of network functions H(s,x) in the form: (1) where x T ={x 1 , x 2 , . . . x Q } is the vector of circuit parameters which remain as symbols, and the...
Hierarchical Symbolic Analysis of Analog Circuits Using TwoPort Networks
"... Abstract: This paper presents a method towards hierarchical symbolic analysis of linear analog circuits using twoport networks. The important difference to the ordinary flat symbolic analysis is, that we treat the transistor pairs as blocks and then derive the transfer function with network analyzer ..."
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Abstract: This paper presents a method towards hierarchical symbolic analysis of linear analog circuits using twoport networks. The important difference to the ordinary flat symbolic analysis is, that we treat the transistor pairs as blocks and then derive the transfer function with network analyzer without to setup and solve a complicated DAE system for a whole analog circuit. The hierarchical idea can be even used to large circuits in divide and conquer manner. Experimental results obtained with some applications of this method are presented. Key–Words: Symbolic analysis, Twoport network 1
An Accurate Error Control Mechanism for Simplification Before Generation Algorihms
"... The use of simplification before generation techniques to enable the approximate symbolic analysis of large analog circuits is discussed. This paper introduces an error control mechanism to drive the circuit reduction, which overcomes the accuracy problems of previous approaches. The features and ef ..."
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The use of simplification before generation techniques to enable the approximate symbolic analysis of large analog circuits is discussed. This paper introduces an error control mechanism to drive the circuit reduction, which overcomes the accuracy problems of previous approaches. The features and efficiency of the new methodology are demonstrated through several practical examples. 1.