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Narrow band stop filters using piezoelectric crystals - have fourth order circuits to produce accurate frequency characteristics
Narrow band stop filters using piezoelectric crystals - have fourth order circuits to produce accurate frequency characteristics
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机译:使用压电晶体的窄带阻滤波器-具有四阶电路以产生准确的频率特性
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摘要
A number of improved bandstop filter circuits uses piezoelectric crystals and fourth order circuits to produce accurate frequency characteristics with a narrowly defined highly damped band. These are of bridged T circuit formation with a parallel and aerial resonant circuit in the series element, and the dual of this in the parallel element. The circuit consists of a series element and of two parallel resonant circuits (C22, L22) in parallel with a series resonant pair (2L11 C11/2), and the parallel element of a series resonant pair (L21/2, 2C21) with a piezoelectric crystal incorporated in it. Several more elaborate networks band on this and their frequency characteristics are also described.
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