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1. 发明申请

US20080112696A1 METHODS AND APPARATUS TO LOCK A PHASE LOCK LOOP TO A MOTOR 有权
标题翻译：将相位锁定环锁定到电机的方法和装置
公开(公告)号：US20080112696A1
公开(公告)日：2008-05-15
申请号：US11697520
申请日：2007-04-06
申请人： Liyong Chen , Irfan Azam Chaudhry , Steven Chacko
发明人： Liyong Chen , Irfan Azam Chaudhry , Steven Chacko
IPC分类号： H02P7/285
CPC分类号： G11B19/28
摘要： Methods and apparatus to lock a phase lock loop to a spindle motor are disclosed. An example controller comprises a counter to determine a period of an operating signal received from a motor, an oscillator to generate a control signal based on an input signal, and an initializer to generate the input value based on the period, wherein the input value causes the oscillator to generate the control signal having the same phase as the operating signal.
摘要翻译：公开了将锁相环锁定到主轴电机的方法和装置。示例性控制器包括：计数器，用于确定从电动机接收的操作信号的周期;基于输入信号产生控制信号的振荡器;以及初始化器，用于基于所述周期生成所述输入值，其中所述输入值导致该振荡器产生具有与操作信号相同相位的控制信号。

2. 发明授权

US07960936B2 Methods and apparatus to lock a phase lock loop to a motor 有权
标题翻译：将锁相环锁定到电机的方法和装置
公开(公告)号：US07960936B2
公开(公告)日：2011-06-14
申请号：US11697520
申请日：2007-04-06
申请人： Liyong Chen , Irfan A. Chaudhry , Steven Chacko
发明人： Liyong Chen , Irfan A. Chaudhry , Steven Chacko
IPC分类号： G05B11/36
CPC分类号： G11B19/28
摘要： Methods and apparatus to lock a phase lock loop to a spindle motor are disclosed. An example controller comprises a counter to determine a period of an operating signal received from a motor, an oscillator to generate a control signal based on an input signal, and an initializer to generate the input value based on the period, wherein the input value causes the oscillator to generate the control signal having the same phase as the operating signal.
摘要翻译：公开了将锁相环锁定到主轴电机的方法和装置。示例性控制器包括：计数器，用于确定从电动机接收的操作信号的周期;基于输入信号产生控制信号的振荡器;以及初始化器，用于基于所述周期生成所述输入值，其中所述输入值导致该振荡器产生具有与操作信号相同相位的控制信号。

3. 发明授权

US06452398B1 Method and apparatus for measuring D.C. and A.C. voltages using non-contacting sensors 失效
标题翻译：使用非接触传感器测量直流电压和交流电压的方法和装置
公开(公告)号：US06452398B1
公开(公告)日：2002-09-17
申请号：US09707781
申请日：2000-11-08
申请人： Joel Libove , Steven Chacko , Jerome Singer
发明人： Joel Libove , Steven Chacko , Jerome Singer
IPC分类号： G01R1506
CPC分类号： G01R15/16
摘要： An apparatus for performing non-contacting measurements of the voltage of a conductor includes a conducting membrane coupled to a transducer. The membrane is driven with an A.C. reference voltage, creating alternating attractive and repulsive electrostatic forces caused by the difference in potential between the membrane and the conductor. The transducer generates a signal having the same frequencies as the forces on the membrane, and the amplitudes of the A.C. components are proportional to the unknown voltage on the conductor. By dividing the amplitude of the A.C. components, an accurate determination of the unknown voltage is calculated A plurality of membranes and transducers may be arrayed to provide an image of multiple voltage readings. In addition, it is also possible to measure A.C. and D.C. voltage on the center conductor of an insulated wire without the need to pierce the insulation.
摘要翻译：用于执行导体的电压的非接触测量的装置包括耦合到换能器的导电膜。膜以A.C.参考电压驱动，产生由膜和导体之间的电位差引起的交替吸引和排斥的静电力。传感器产生的信号具有与膜上的力相同的频率，而交流分量的幅度与导体上的未知电压成比例。通过除去交流分量的振幅，计算未知电压的精确确定。可以排列多个膜和换能器以提供多个电压读数的图像。此外，还可以测量绝缘电线中心导体上的直流电压和直流电压，而不需要刺穿绝缘体。

4. 发明授权

US08437169B2 Fast response circuits and methods for FRAM power loss protection 有权
标题翻译：快速响应电路和FRAM掉电保护方法
公开(公告)号：US08437169B2
公开(公告)日：2013-05-07
申请号：US12973362
申请日：2010-12-20
申请人： Degang Xia , Steven Chacko , Richard Lawrence Duncan , Chuan Ni
发明人： Degang Xia , Steven Chacko , Richard Lawrence Duncan , Chuan Ni
IPC分类号： G11C11/22
CPC分类号： G11C11/22
摘要： A circuit to protect data on an FRAM during a read operation includes an FRAM voltage regulator having an output to supply an FRAM operating voltage to the FRAM. A voltage monitor monitors a supply voltage for the FRAM to generate a voltage fault signal if the supply voltage falls below a predetermined value. And a circuit responsive to the voltage fault signal maintains the FRAM operating voltage above a voltage required to assure data integrity of the FRAM for a sufficient time required to perform an FRAM read operation.
摘要翻译：在读取操作期间保护FRAM上的数据的电路包括具有向FRAM提供FRAM工作电压的输出的FRAM稳压器。如果电源电压低于预定值，则电压监视器监视FRAM的电源电压以产生电压故障信号。并且响应于电压故障信号的电路将FRAM操作电压保持在所需的电压以保证FRAM的数据完整性足以执行FRAM读取操作所需的足够的时间。

5. 发明申请

US20120155144A1 FAST RESPONSE CIRCUITS AND METHODS FOR FRAM POWER LOSS PROTECTION 有权
标题翻译：快速响应电路和框架电力损失保护方法
公开(公告)号：US20120155144A1
公开(公告)日：2012-06-21
申请号：US12973362
申请日：2010-12-20
申请人： Degang Xia , Steven Chacko , Richard Lawrence Duncan , Chuan Ni
发明人： Degang Xia , Steven Chacko , Richard Lawrence Duncan , Chuan Ni
IPC分类号： G11C11/22
CPC分类号： G11C11/22
摘要： A circuit to protect data on an FRAM during a read operation includes an FRAM voltage regulator having an output to supply an FRAM operating voltage to the FRAM. A voltage monitor monitors a supply voltage for the FRAM to generate a voltage fault signal if the supply voltage falls below a predetermined value. And a circuit responsive to the voltage fault signal maintains the FRAM operating voltage above a voltage required to assure data integrity of the FRAM for a sufficient time required to perform an FRAM read operation.
摘要翻译：在读取操作期间保护FRAM上的数据的电路包括具有向FRAM提供FRAM工作电压的输出的FRAM稳压器。如果电源电压低于预定值，则电压监视器监视FRAM的电源电压以产生电压故障信号。并且响应于电压故障信号的电路将FRAM操作电压保持在所需的电压以保证FRAM的数据完整性足以执行FRAM读取操作所需的足够的时间。

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