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1. 发明授权

US3750034A System for determining whether a signal lies within a selected frequency band 失效
标题翻译：用于确定信号在选定频带中的信号的系统
公开(公告)号：US3750034A
公开(公告)日：1973-07-31
申请号：US3750034D
申请日：1971-05-28
申请人： HAZELTINE CORP
发明人： MARUCCI R , GALATIOTO S
IPC分类号： H03K3/013 , H03K5/20
CPC分类号： H03K3/013
摘要： Disclosed is a system for receiving and detecting propagated mechanical-wave analog signals in which the analog signals are converted to a digital signal wherein pulse spacing is proportional to the corresponding instantaneous frequency of the detected mechanical wave signals. A digital processor compares the pulse-spacing of successive pulses of the incoming digital signal with selected pulse-spacing limits corresponding to the frequency limits of the selected bandwidth, and an output signal is generated indicating the receipt of analog signals within the selected frequency band whenever all of the successive pulses during a sampling interval lie within the selected pulse-spacing limits. Generation of an output signal is inhibited when any pair of successive pulses has a pulse spacing outside of the pulsespacing limits during the sampling interval.
摘要翻译：公开了一种用于接收和检测传播的机械波模拟信号的系统，其中模拟信号被转换成数字信号，其中脉冲间隔与检测到的机械波信号的对应的瞬时频率成正比。数字处理器将输入数字信号的连续脉冲的脉冲间隔与对应于所选带宽的频率极限的选定脉冲间隔限制进行比较，并且产生指示在所选频带内接收模拟信号的输出信号，每当在采样间隔期间的所有连续脉冲位于所选择的脉冲间隔限度内。当任何一对连续脉冲在采样间隔期间具有超出脉冲间隔极限的脉冲间隔时，抑制输出信号的产生。

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