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2. 发明授权

US4412301A Digital data correlator 失效
标题翻译：数字数据相关器
公开(公告)号：US4412301A
公开(公告)日：1983-10-25
申请号：US271737
申请日：1981-06-08
申请人： W. Douglas Strubeck
发明人： W. Douglas Strubeck
IPC分类号： G06J1/00 , H04L7/04 , G06F15/34
CPC分类号： G06J1/005 , H04L7/042
摘要： A digital data correlator is provided which detects the presence of a particular sequence, or correlating pattern, of binary data bits in a serial binary data stream, is tolerant of data errors, and is adjustable to accept different numbers of data errors. The correlator includes a shift register of the CMOS type, a plurality of inverters of the CMOS type connected to selected outputs of the register at which bits of a particular logic value are expected for a properly positioned correlating pattern in the register, and a plurality of like-valued resistances coupled to the outputs of the register and to the inverters. Erroneous bits in the register cause an error voltage to be produced at a common node point coupled to the resistances. The value of the error voltage is compared in a comparator against a threshold reference voltage of a value related to an acceptable number of erroneous bits. An output of a first logic value is produced by the comparator when the number of erroneous bits in the register exceeds the acceptable number, and an output of a second logic value is produced by the comparator when the number of erroneous bits in the register is equal to or less than the acceptable number.The digital data correlator further includes circuitry capable of altering the number of erroneous bits that will be tolerated or accepted by the correlator.
摘要翻译：提供了一种数字数据相关器，其检测串行二进制数据流中二进制数据位的特定序列或相关模式的存在，其容忍数据错误，并且可调整以接受不同数量的数据错误。相关器包括CMOS类型的移位寄存器，连接到寄存器的选定输出的多个CMOS型反相器，在寄存器的选定输出端期望特定逻辑值的位用于寄存器中适当定位的相关模式，以及多个耦合到寄存器和逆变器的输出的等价电阻。寄存器中的错误位导致在耦合到电阻的公共节点处产生误差电压。误差电压的值在比较器中与与可接受数量的错误位相关的值的阈值参考电压进行比较。当寄存器中的错误位的数量超过可接受的数量时，比较器产生第一逻辑值的输出，当寄存器中的错误位的数量相等时，由比较器产生第二逻辑值的输出达到或小于可接受的数量。数字数据相关器还包括能够改变由相关器容忍或接受的错误位的数量的电路。

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