专利名称：Device for frequency discrimination of
electrical signals
发明人：Raffaele Cerra,Michele Scherillo申请号：US05/671373申请日：19760329公开号：US04050026A公开日：19770920
摘要：A device for filtering and frequency discrimination includes a filtering sectionand frequency discriminator connected in tandem. The filtering section consists of abandpass filter and two resonant components in series. The discriminator includes tworesonant components with their inputs connected in parallel, followed by respectivedetectors connected to respective inputs of an output differential amplifier. Each of theresonant components is a respective sampled filter tuned to a given respectivefrequency. Each of the sampled filters is controlled by a respective control signal ofcorresponding frequency, all control signals being derived from signals supplied from asingle high-stability oscillator. The oscillator is preferably a quartz crystal-controlledoscillator.
申请人：CERRA; RAFFAELE,SCHERILLO; MICHELE
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