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1. 发明公开

EP0547292A1 Picosecond event timer 失效
标题翻译： ZeitmesserfürEreignisse im Picosekundenbereich。
公开(公告)号：EP0547292A1
公开(公告)日：1993-06-23
申请号：EP92113443.3
申请日：1992-08-06
申请人： Hewlett-Packard Company
发明人： Chu, David C. , Knotts, Thomas A.
IPC分类号： G04F10/00 , G04F10/04
CPC分类号： G01R29/0273
摘要： A circuit for time stamping event signals, e.g. zero-crossings, using coarse and fine timers. The fine timer (15) is a circuit section which subdivides a period from a phase-locked ring-oscillator (13) into 2N subparts (39). An event signal is timed by latching a digital representation of a particular subpart. The digital representation of the subpart is an N-bit dual thermometer code (41) which uniquely identifies each subpart with each adjacent subpart differing by only one bit. The subparts are made finer in time quantization than the propagation delay of one active element in the ring oscillator (13) by the use of linear combiner elements (71, 73, 75). The dual thermometer code (41), encoded post-latching into a binary code, forms the "fine" timing part of a binary word representation of the event time. The event (11) also latches the count states of a pair of lead-lag counters (150, 151) in a master-slave configuration counting ring oscillator periods. These counters change states respectively before and after the dual thermometer code turn-overs. Only one reading is chosen for recording as determined by the most significant bit of the fine code. The choice will always find an accurate and stable reading, and reject erroneous readings resulting from reading a counter in transition. The chosen counter reading, encoded to binary, forms the coarse timer (17) for the binary word representation of the event time. The coarse and fine binary words are butt-joinable to form the complete binary timing representation without further arithmetic processing.
摘要翻译：用于时间戳事件信号的电路，例如。过零点，使用粗细和定时器。精细定时器（15）是将锁相环形振荡器（13）的周期分为2N个子部分（39）的电路部分。通过锁定特定子部件的数字表示来定时事件信号。子部件的数字表示是N位双温度计代码（41），其唯一地标识每个子部分，其中每个相邻子部分仅差一位。通过使用线性组合器元件（71,73,75），子部件在时间量化中比在环形振荡器（13）中的一个有源元件的传播延迟更精细。编码后锁定成二进制码的双温度计代码（41）形成事件时间的二进制字表示的“精细”定时部分。事件（11）还在主从配置计数环形振荡器周期中锁存一对超前滞后计数器（150,151）的计数状态。这些计数器在双温度计代码转换之前和之后分别改变状态。只有一个读取被选择用于记录，由精细代码的最高有效位确定。选择将始终找到准确稳定的阅读，并拒绝在转换期间读取计数器导致的错误读数。编码为二进制的所选计数器读数形成事件时间的二进制字表示的粗定时器（17）。粗略和精细的二进制字是对接的，以形成完整的二进制定时表示，而无需进一步的算术处理。

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