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1. 发明授权

US5710710A Frequency counter with reduced false correlations 失效
标题翻译：频率计数器减少虚假相关性
公开(公告)号：US5710710A
公开(公告)日：1998-01-20
申请号：US561692
申请日：1995-11-22
申请人： William P. Owen , Judd Sheets
发明人： William P. Owen , Judd Sheets
IPC分类号： G01R23/02 , G01R23/10 , G01R23/00 , G06F17/00
CPC分类号： G01R23/10 , G01R23/02
摘要： An improved frequency counter for more reliably reading the frequency of low level signals by employing a method of separating the desired signal from undesirable noise related signals, wherein the frequency counter comprises signal input amplifier circuitry, a frequency modulator circuit for phase shifting the self-oscillation frequency of the undesired signal to isolate it from the valid signal, a prescaler circuit, a frequency or pulse counter driven by the output of the prescaler, and a correlator circuit for differentiating the self-oscillation frequencies from the main signal frequency so as to reduce false correlations between the self-oscillation, or noise, and valid signals.
摘要翻译：一种改进的频率计数器，用于通过采用将期望信号与不期望的噪声相关信号分离的方法更可靠地读取低电平信号的频率，其中频率计数器包括信号输入放大器电路，用于相位自振荡的频率调制器电路不需要的信号的频率使其与有效信号隔离，预分频器电路，由预分频器的输出驱动的频率或脉冲计数器，以及用于将自振荡频率与主信号频率区分开来的相关器电路，以便减少自振荡或噪声与有效信号之间的假相关。

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