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本文就单片集成双二次开关电容滤波器所涉及的关键环节——基本组态、模拟优化和集成实现——进行了分析探讨.其中强调了 SCF 网络各基本电子单元设计考虑的主要着眼点,概括讨论了单片集成 Biquad—SCF 所涉及到的诸关键环节,导出了实用的双二次六阶带通电路,给出了模拟集成化 SCF 网络和最优化精密电容比的理论模型.其中包括为给 SCF 网络设计和工艺实施提供指南而对其诸基本组态设计侧重点的考虑;新型网络及其版图设计研究;
In this paper, the key links involved in the monolithic double-quadratic switched capacitor filter - basic configuration, simulation optimization and integrated implementation, are analyzed and discussed. The main focus of each basic electronic unit design consideration of SCF network is emphasized The key steps involved in the monolithic integration of Biquad-SCF are discussed in detail. A practical biquadratic sixth-order bandpass circuit is derived, and a theoretical model of the integrated SCF network and the optimized precision capacitance ratio is given. Including considerations for designing the basic configuration of SCFs for providing guidance on network design and process implementation; new network and layout design studies;