带通滤波器设计指南1TUTORIALA GENERAL DESIGN PROCEDURE FOR BANDPASS FILTERS DERIVED FROM LOW PASS PROTOTYPE ELEMENTS: PART IBFig. 1 Circuit topologies of low pass prototype filters. wg0 = 1.00 + e1(s) andpass filters serve a variety of functions in communication, radar and instrumentation subsystems. Of the available techniques for the design of bandpass filters, those techniques based upon the low pass elements of a prototype filter have yielded successful results in a wide range of applications. The low pass prototype elements are the normalized values of the circuit components of a filter that have been synthesized for a unique passband response, and in some cases, a unique out-of-band response. The low pass prototype elements are available to the designer in a number of tabulated sources 1,2,3 an……
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