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1. 发明授权

US09342054B2 Apparatus and method of keeping time of day over an industrial temperature range 有权
标题翻译：在工业温度范围内保持时间的装置和方法
公开(公告)号：US09342054B2
公开(公告)日：2016-05-17
申请号：US13431143
申请日：2012-03-27
申请人： Bertram John White , Nathan Theodore Hackett
发明人： Bertram John White , Nathan Theodore Hackett
IPC分类号： G04G3/04
CPC分类号： G04G3/04
摘要： Various embodiments of the invention relate generally to real-time clock circuit, and more particularly to systems, devices and methods of integrating two oscillators in one real-time clock circuit to generate accurate time of day over an industrial temperature range. A primary oscillator is employed to generate a first high precision clock while having a higher frequency and consuming more power; a secondary oscillator is employed to generate a second clock that has a low frequency and consumes less power, but may not meet the time accuracy requirement. When the real-time clock is provided with sufficient power (MSN mode), time of day is constantly tracked by the primary oscillator, but when the real-time clock is powered by a battery (SLEEP mode), time of day is tracked by the secondary oscillator while the primary oscillator is switched on at an update frequency to compensate errors in the time of day.
摘要翻译：本发明的各种实施例一般涉及实时时钟电路，更具体地涉及将两个振荡器集成在一个实时时钟电路中以在工业温度范围内产生准确时间的系统，设备和方法。采用主振荡器产生第一高精度时钟，同时具有更高的频率并消耗更多的功率; 采用二次振荡器来产生具有低频率并且消耗较少功率但可能不满足时间精度要求的第二时钟。当实时时钟提供足够的功率（MSN模式）时，主时钟始终跟踪时钟，但是当实时时钟由电池供电（休眠模式）时，时间会被跟踪主振荡器以更新频率接通，以补偿一天中的错误。

2. 发明授权

US6163118A Method and apparatus for controlling a motor in a mass storage device 有权
标题翻译：用于控制大容量存储装置中的电动机的方法和装置
公开(公告)号：US6163118A
公开(公告)日：2000-12-19
申请号：US197243
申请日：1998-11-20
申请人： Hao Chen , Gregory Swize , Bertram John White
发明人： Hao Chen , Gregory Swize , Bertram John White
IPC分类号： H02P6/16 , G11B19/20 , G11B19/28 , H02P27/02 , H02K23/00
CPC分类号： G11B19/28
摘要： A method of detecting phase error between a phase current and a driving voltage includes generating a signal indicative of the phase current. The method includes identifying a time interval during which the signal indicative of the phase current is generally symmetric about a midpoint of the time interval when the phase error is approximately zero. The method further includes determining the extent to which the signal indicative of the phase current is symmetric about the midpoint of the time interval. Finally, in response to determining the extent to which the signal indicative of the phase current is symmetric, the method includes generating phase error information.
摘要翻译：检测相电流和驱动电压之间的相位误差的方法包括产生表示相电流的信号。该方法包括识别当相位误差近似为零时，指示相电流的信号大致对称于时间间隔的中点的时间间隔。该方法还包括确定指示相电流的信号在时间间隔的中点对称的程度。最后，响应于确定指示相电流的信号的对称程度，该方法包括产生相位误差信息。

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