Abstract:
A servo control system micro-electromechanical systems (MEMS)-based motion control system (and method therefor), includes a motion generator having an inherent stiffness component.
Abstract:
A method and systems for optimizing Asymmetric Digital Subscriber Line (ADSL) connections in DSL Access Multiplexor (DSLAM) that marries benefits of G.dmt and G.lite standards, using a flexible method implemented on a programmable Digital Signal Processor (DSP) and a Network Processor (NP) is disclosed. It provides a means to support full G.dmt rates for any of the attached users as long as less than half the users are actively moving data through the DSLAM, but by only using half the digital signal processing hardware and half the power consumption for the line drivers. The invention allows doubling the number of,ADSL ports available over a conventional scheme given about 20% more power is under 50% with only half the respective connections, all those G.dmt rates possible on their exceeds 50%, gradually active G.lite rates based on either based on a tiered tariff structure, until ultimately, when the utilization reaches 100%, all subscribers will be forced back to a maximum rate afforded by G.lite. Only as utilization drops back off, will active subscribers be brought back up to G.dmt's maximum transmission rates. Once the utilization drops below 50% again, then all active subscribers will be able to utilize G.dmt's maximum transmission rates. budget. When the utilization subscribers active on their users experience the maximum wire. However, when utilization subscribers start to experience a fixed policy or one that is based on a tiered tariff structure, until ultimately, when the utilization reaches 100%, all subscribers will be forced back to a maximum rate afforded by G.lite. Only as utilization drops back off, will active subscribers be brought back up to G.dmt's maximum transmission rates. Once the utilization drops below 50% again, then all active subscribers will be able to utilize G.dmt's maximum transmission rates.
Abstract:
PROBLEM TO BE SOLVED: To provide a fully synchronous servo channel for a data tape drive.SOLUTION: A fully synchronous servo channel for a data tape drive is provided by including: initial acquisition of synchronous servo channel parameters; generation of a timing basis for signal interpolation; generation of a tape velocity estimate and a y-position estimate; and an optimum detection of longitudinal position (LPOS) symbols.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for an equalizer calculation in a media system using a data set separator sequence. SOLUTION: An equalizer coefficient generator receives a DSS (data set separator)sequence and a DSS readback sequence being a function of channel processing of the DSS sequence by a read channel. The generator generates a coefficient cyclic equalizer vector as a function of the DSS sequence and DSS readback sequence. Furthermore, the generator generates an error signal as a function for comparing the DSS sequence with the DSS readback sequence based on the coefficient cyclic equalizer vector in equalization. An unacceptable error signal shows the need of adjusting the coefficient cyclic equalizer vector so as to obtain acceptable comparison of the DSS sequence with the DSS readback sequence based on the coefficient cyclic equalizer vector in equalization. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
Apparatus for detecting data in a sensor signal generated by a read sensor in a local probe data storage device comprises a differentiation for subtracting a value of the sensor signal from the succeeding value of the sensor signal to generate a ternary difference signal ; and a convertor connected to the differentiator for converting the difference signal into a binary output signal indicative of the detected data. A local probe data storage device comprising such apparatus is also described.
Abstract:
PROBLEM TO BE SOLVED: To provide a fully synchronous servo channel for a data tape drive. SOLUTION: The fully synchronous servo channel for a data tape drive includes the initial acquisition of synchronous servo channel parameters, generation of a timing basis for signal interpolation, generation of a tape velocity estimate and a y-position estimate, and optimum detection of longitudinal position (LPOS) symbols. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a probe, for scanning across a substrate in which simple and accurate operation can be made, and a data storage device equipped with the probe. SOLUTION: The data storage device includes a storage medium for storing the data in a form of a mark and at least one probe for scanning across the storage medium. The probe includes, a spring cantilever (31) mechanically fixed to the probe holding structure during operation of the probe, a chip (32) equipped with a tip of a nanoscale, and an actuator for positioning the chip (32) in longitudinal direction. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
A servo control system micro-electromechanical systems (MEMS)-based motion control system (and method therefor), includes a motion generator having an inherent stiffness component.
Abstract:
PROBLEM TO BE SOLVED: To efficiently identify a channel dibit response based on a DSS sequence. SOLUTION: A dibit response estimation generator receives a DSS sequence and a DSS read-back sequence, which is a function of channel processing of the DSS sequence by a read channel. The generator generates a cyclic dibit response vector as the functions of the DSS sequence and DSS read-back sequence. Further, the generator generates an error signal as the function of comparison of the DSS read-back sequence and filtering of the DSS sequence based on the cyclic dibit response vector. An unacceptable error signal indicates a need to adjust the cyclic dibit response vector so as to yield acceptable comparison of the DSS read-back sequence with the filtering of the DSS sequence based on the cyclic dibit response vector. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a device, a system, and a method for detecting asymmetrical maximum likelihood. SOLUTION: In an initialization module, a plurality of branch metrics and a plurality of path memories are initialized. In a coefficient module, a plurality of coefficients are calculated. In the calculation module, a first and second designated likelihood functions are calculated. In a selection module, a third designated branch metric is calculated as the maximum value among the first and the second designated likelihood functions. In the path metric module, the third designated path memory is calculated from a first and second designated path memory. In a result module, a data output value is identified from one or more path memories. COPYRIGHT: (C)2006,JPO&NCIPI