“variable-bandwidth filter”的概念、定义、翻译、参考文献-科学参考

单词	variable-bandwidth filter
释义	variable-bandwidth filter [`ver·ē·ǝ·bǝl ¦band´width ´fil·tǝr] ^ELECTRONICS An electric filter whose upper and lower cutoff frequencies may be independently selected, so that almost any bandwidth may be obtained; it usually consists of several stages of RC filters, each separated by buffer amplifiers; tuning is accomplished by varying the resistance and capacitance values.
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