发明名称 Tamper detectable electronic security package
摘要 An intrusion detection electronic circuit package, includes a containment wall in combination with first and second transmission lines being organized in patterns spaced adjacent one another. Electronic circuitry, residing within the containment wall, includes a transmitter for transmitting signals in anti-phase relationship via the first and second transmission lines respectively. A receiver receives signals from the transmission lines and a detector connected to the receiver uses EXCLUSIVE OR logic to detect any significant in-phase components or interruptions in the signals received at the first and second inputs of the receiver. Disturbance of either transmission line in any attempt to breach the containment wall is likely to be detected.
申请公布号 US5506566(A) 申请公布日期 1996.04.09
申请号 US19930057390 申请日期 1993.05.06
申请人 NORTHERN TELECOM LIMITED 发明人 OLDFIELD, JOHN A.;SABRY, H. CHARLES;JONES, ADRIAN D.
分类号 G08B13/12;(IPC1-7):G08B13/00 主分类号 G08B13/12
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