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العنوان
Computer Aided Design of Switched - Capacitor Networks /
المؤلف
Ahmed, Mohammed Abu Zahad Abu Zeid.
هيئة الاعداد
باحث / محمد ابو زهاد ابو زيد
مشرف / ممدوح ابراهيم فؤاد
مناقش / فؤاد سوريالى عطية
مناقش / ديفيد هاى
الموضوع
Electric Circuits.
تاريخ النشر
1988.
عدد الصفحات
196 p. :
اللغة
الإنجليزية
الدرجة
الدكتوراه
التخصص
الهندسة الكهربائية والالكترونية
الناشر
تاريخ الإجازة
13/11/1988
مكان الإجازة
جامعة أسيوط - كلية الهندسة - الهندسة الكهربائية
الفهرس
Only 14 pages are availabe for public view

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from 159

Abstract

A new algorithm is presented for the design and synthesis of switched capacitor filters initially, an efficient interactive scheme is described for the construction of a class of selective linear phase distributed bandpass filter with equiripple passband loss response. The stopband response is controlled by an arbitrary number of transmission zeros at both zero and infinity besides a specified minimum loss at the two frequencies defining the stophand edges. The solution has been obtained in terms of digital linear phase bandpass polynominals. Then, the transfer function of the filter is synthesized using classical distributed circuits. The synrgesis procedure follows the steps used in microwave filter synthesis. Finally, a novel switched capacitor implementation is performed using a new approach based on the reflection filter concept. The resulting switched-capacitor circuits are completely insensative to parasitic capactances, as well as having low capacitance spread ratio. As the synthesis approach imitates lossless doubly terminated networks, it still possesses its low sensitivity. Design tables and illustrative examples are also included.
A novel algorithm is also presented for the high frequencies analysis of switched capacitor networks, with nonidealities such as non-zero switch resistance, finite operational amplifier dc gain and gain-bandwidth product, as well as parasitic capacitances. The algorithm has been implemented in a computer program. It is used to analyze multi-phase networks of any topatogy, by reducing its modified nodal admittance matrix to state space form. The resulting matrices are then manipulated to produce both the time-domain and the z-domain responces several examples demonstrating the potential of this approach are illustrated.