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    • 2. 发明授权
    • Analog channel for mixed-signal-VLSI tester
    • US5748124A
    • 1998-05-05
    • US762395
    • 1996-12-09
    • Daniel RosenthalKannan KonathRobert WhyteEric NortonStuart Robert Pearce
    • Daniel RosenthalKannan KonathRobert WhyteEric NortonStuart Robert Pearce
    • G01R31/316G01R31/3167G01R31/317G06F3/05G06F11/22H03M1/10
    • G01R31/3167G01R31/31716
    • Mixed-signal tester architecture and methods are provided which minimize transfer of data, offer parallel data post-processing within the analog channels, and allow flexible synchronization. Multiple analog channels each have a source digital signal processor (DSP), a digital source sequencer, digital source instrumentation, analog source instrumentation, analog measure instrumentation, digital measure instrumentation, a digital pin multiplexer, a digital measure sequencer, DSP-addressable multi-bank capture memory, a capture digital signal processor, and an inter-DSP feedback path for communication between the source DSP and the capture DSP. Each analog channel can be arranged in a feedback loop through either its analog and/or digital instrumentation using the inter-DSP feedback path. DUT response is processed in the channel, the result is used to define parameters for a subsequent test cycle, and a signal corresponding to these parameters is generated and applied to the DUT. This loop-back of the result of a test cycle within the analog channel to define the next test cycle speeds up the test process. The source DSP can synthesize signals in real time and apply these to the DUT through analog or digital source instrumentation, and can synthesize source sequencer memory addresses (pointers to waveform-data stored in memory which represent waveforms or waveform segments) in real time and apply these signals to the DUT through analog or digital source instrumentation. DUT response is written to capture-memory in the channel which is directly addressable by the capture DSP, avoiding transfer of data before processing and further speeding the test process. Multi-bank capture memory controlled by the capture DSP allows data representing DUT response to be written into one bank while previously-written data in another bank is processed. This interleaving of data capture and data processing allows simultaneous capture and processing, further speeding the test process.
    • 3. 发明申请
    • Hard disk drive (HDD) electrical over voltage stress (EOS) systems and methods
    • 硬盘驱动器(HDD)电气过压应力(EOS)系统和方法
    • US20050009378A1
    • 2005-01-13
    • US10913604
    • 2004-08-05
    • James ChloupekRobert Whyte
    • James ChloupekRobert Whyte
    • H02H9/04H02H11/00H02B1/056
    • H02H11/007H02H9/04
    • The present invention relates to a hard disk drive system having overvoltage protection circuits for various types of overvoltage conditions. For example, the system comprises one or more hard disk drive integrated circuit chips residing on a board and a hard disk drive power plug receptacle residing on the board having two different value power supply ports associated therewith. The receptacle is operable to receive a power plug therein, wherein when the power plug is inserted therein in a proper orientation the two different value voltages are properly supplied to the one or more hard disk drive integrated circuit chips, and wherein when the power plug is inserted therein in an improper orientation the two different value voltages are switched with respect to their intended values. The system comprises a reverse power plug orientation protection circuit coupled between the hard disk drive power plug receptacle and at least one of the one or more hard disk drive integrated circuit chips. The protection circuit is operable to detect an improper orientation of the power plug when inserted into the hard disk drive power plug receptacle and reduce a larger of the two different voltage values, thereby preventing an electrical over voltage stress of the at least one hard disk drive integrated circuit chip.
    • 本发明涉及具有用于各种过电压条件的过电压保护电路的硬盘驱动系统。 例如,系统包括位于板上的一个或多个硬盘驱动器集成电路芯片和驻留在板上的硬盘驱动器电源插头插座,其具有与其相关联的两个不同值的电源端口。 所述插座可操作以在其中接收电源插头,其中当所述电源插头以正确方向插入其中时,将两个不同的电压值适当地提供给所述一个或多个硬盘驱动器集成电路芯片,并且其中当所述电源插头 以不适当的方向插入其中,两个不同的值电压相对于其预期值被切换。 该系统包括耦合在硬盘驱动器电源插头插座和一个或多个硬盘驱动器集成电路芯片中的至少一个之间的反向电源插头取向保护电路。 保护电路可操作以检测插入到硬盘驱动器电源插座中时电源插头的不正确方向,并减小两个不同电压值中较大的一个,从而防止至少一个硬盘驱动器的过电压应力 集成电路芯片。
    • 5. 发明授权
    • Analog channel for mixed-signal-VLSI tester
    • US5646521A
    • 1997-07-08
    • US510397
    • 1995-08-01
    • Daniel RosenthalKannan KonathRobert WhyteEric NortonStuart Robert Pearce
    • Daniel RosenthalKannan KonathRobert WhyteEric NortonStuart Robert Pearce
    • G01R31/316G01R31/3167G01R31/317G06F3/05G06F11/22G01R31/28
    • G01R31/3167G01R31/31716
    • Mixed-signal tester architecture and methods are provided which minimize transfer of data, offer parallel data post-processing within the analog channels, and allow flexible synchronization. Multiple analog channels each have a source digital signal processor (DSP), a digital source sequencer, digital source instrumentation, analog source instrumentation, analog measure instrumentation, digital measure instrumentation, a digital pin multiplexer, a digital measure sequencer, DSP-addressable multi-bank capture memory, a capture digital signal processor, and an inter-DSP feedback path for communication between the source DSP and the capture DSP. Each analog channel can be arranged in a feedback loop through either its analog and/or digital instrumentation using the inter-DSP feedback path. DUT response is processed in the channel, the result is used to define parameters for a subsequent test cycle, and a signal corresponding to these parameters is generated and applied to the DUT. This loop-back of the result of a test cycle within the analog channel to define the next test cycle speeds up the test process. The source DSP can synthesize signals in real time and apply these to the DUT through analog or digital source instrumentation, and can synthesize source sequencer memory addresses (pointers to waveform-data stored in memory which represent waveforms or waveform segments) in real time and apply these signals to the DUT through analog or digital source instrumentation. DUT response is written to capture-memory in the channel which is directly addressable by the capture DSP, avoiding transfer of data before processing and further speeding the test process. Multi-bank capture memory controlled by the capture DSP allows data representing DUT response to be written into one bank while previously-written data in another bank is processed. This interleaving of data capture and data processing allows simultaneous capture and processing, further speeding the test process.