Abstract: A servo positioned carriage and actuator assembly in which the support structure for the carriage is located at least partially within the central portion of the motor. In one embodiment, the assembly includes a motor, a guide rail and a carriage that travels along the guide rail. The motor has a coil of electrically conductive windings and a magnet or magnets adjacent to the coil. The inside perimeter of the coil defines the central portion of the motor. The guide rail extends axially through the central portion of the motor.

Abstract: An apparatus for and a method of multi-dimensional constraint optimization in a storage system configuration. In accordance with the primary aspect of the present invention, the objective function for a storage system is determined the workload units are selected and their standards are determined, and the storage devices are selected and their characteristics are determined. These selections and determinations are then used by a constraint based solver through constraint integer optimization to generate an assignment plan for the workload units to the storage devices.

Abstract: A method of operating a ferroelectric liquid crystal-based spatial light modulator in a non-DC-Balanced mode to delay the onset of pixel sticking. The method includes providing a spatial light modulator including a transparent electrode, a pixellated electrode, and a ferroelectric liquid crystal layer sandwiched between the transparent electrode and the pixellated electrode. The spatial light modulator is illuminated with a light source for an illumination time. A portion of the pixellated electrode is set to a high drive signal voltage level during a first portion of illumination time, and set to a low drive signal voltage level during a second portion of the illumination time. The transparent electrode is maintained at a first voltage potential between the high drive signal voltage level and the low drive signal voltage level during the first and second portions of illumination time. The spatial light modulator is then darkened for a darkened time.

Abstract: An inkjet printing device is arranged to employ a first set of multiple nozzle drop generators activated by a first address signal and a second set of multiple nozzle drop generators activated by a second address signal. The multiple nozzles of each drop generator of the first set are arranged in a predetermined geometric pattern, each of which encompasses at least one nozzle of a drop generator of the second set. The ink ejectors of one drop generator of the first drop generator set are arranged in subgroups, one subgroup of which shares a switched power return with one subgroup of ink ejectors of one drop generator of the second drop generator set.

Abstract: The present disclosure relates to an upgradable storage system. The storage system comprises a memory device compartment that is adapted to receive memory devices in a stacked orientation, and at least one memory device disposed within the memory device compartment. Typically, each of the memory devices has electrical contacts disposed on top and bottom surfaces of the memory devices with which the memory devices electrically connect to each other. In a preferred arrangement, each memory device comprises an ARS device.

Abstract: A system and method provide information from a tape cartridge in two axes of the tape cartridge. A memory device is attached to the tape cartridge. At least one data transmitting antenna is provided in communication with the memory device. The data transmitting antenna is mounted to the tape cartridge at an angle to effectively transmit data to two axes of the tape cartridge. The data is transmitted using magnetic fields. Power is supplied to the memory device and the data transmitting antenna using magnetic fields.

Abstract: A method and system for capturing analog video data and previewing still video images of the captured analog video data without converting the analog video data into digital image data. The system takes analog video data and converts the data into raw digitized video data. The raw digitized video data is stored in a memory until the data is selected for previewing. Once selected, the raw digitized video data is reconverted into analog video data that presents a still image of the desired data. The system is also able to discard unnecessary portions of the raw digitized video data and store only necessary portions of the raw digitized video data. Preferably, the video capture, preview, and storage technique is used in video printing. When used in video printing, the raw digitized video data is converted into digital image data using a software decoding process.

Abstract: An improved method for operating a storage system based on a SCSI communication protocol. In general, the storage system has a data storage medium for storing information and a controller for receiving and generating messages on a communication bus executing a SCSI communication protocol. The controller responds to first and second classes of messages, each message including data specifying the source device that sent the message and a destination device to receive information generated by the message. The first class of messages includes read/write requests directed to a mode page in the storage system, and the second class of messages includes read/write requests specifying an address in the storage system at which data is to be read or written. In a storage system according to the present invention, a virtual mode page is provided for each possible device on the communication bus. The virtual page includes a region of the storage medium reserved for that device.

Abstract: Printhead and printer arrangements that provide digital delay between firing signals for a common firing interval. The delay achieves a controlled, staggered generation of firing signals that reduces EMI and instantaneous power supply draw and reduces or eliminates certain shielding requirements. Various arrangements are provided, including the use of edge triggered digital delay elements, staggered firing signal generation from firing signal control logic and the use of analog delay elements.

Abstract: A preferred data storage system includes a memory storage device that incorporates a storage medium and electron beam emitters which are configured to electrically communicate with the storage medium. The storage medium and the emitters are configured to move relative to each other so that each emitter may provide a beam of electrons within a respective coverage area of the storage medium. Each coverage area includes at least one storage area which is configurable in at least two structural states, which represent information stored in the storage areas. A data recovery system also is provided which is communicatively coupled with the memory storage device. The data recovery system is configured to determine whether a first emitter of the memory storage device has failed and to recover information stored in at least one of the storage areas of the first emitter with a second emitter of the memory storage device. Computer readable media and methods also are provided.

Abstract: Method and apparatus for recovering a timing reference signal in an optical storage subsystem. The timing reference signal is recovered by passing it through a zonal bandpass filter coupled to a hard limiter, which feeds a phase locked loop that produces the reference signal.

Abstract: I/O activity of a data storage system is characterized by collecting system traces generated during the I/O activity, grouping records in the system traces according to stores, identifying I/O activity in streams corresponding to the stores, and processing the groups of records to characterize I/O activity for the streams. The stores represent units of storage such as logical drives, single data storage devices and groups of data storage devices in the data storage system. Characterizations of the I/O activity may be used to re-allocate data across the data storage system.

Abstract: There is disclosed in interface circuit that nodes on a bus to be galvanically isolated while still having a wired-AND functionality. Once nodes are galvanically isolated, a transceiver can be placed in the bus structure and allow for wire-less communication across the bus without adding additional delays or routing complexity.

Abstract: An apparatus and method for mounting a tape drive head to a carriage that supports the head on the actuator. The method includes the steps of providing an inside corner on either the head or the carriage, providing a mating outside corner on the other of the head or the carriage, drawing the outside corner into the inside corner, and fastening the head to the carriage. The apparatus includes an inside corner on either the head or the carriage, a mating outside corner on the other of the head or the carriage, and a fastener that secures the head to the carriage. The inside and outside corners are configured to fit together when the head is fastened to the carriage. Preferably, the fastener is configured to pull the outside corner into the inside corner as the head is fastened to the carriage. This may be achieved, for example, by angling the fastener toward the inside corner.

Abstract: A method and apparatus for an electrophotographic color printer. The method of developing a color image onto a photoconductor includes providing a single base charge to the photoconductor and then using a cascade of developer potentials for the toners in the process such that earlier applied toners are at higher electrical potentials than are later applied toners. Consequently, the latter applied toners will not tend to migrate to the previously developed sections. Additionally, the method includes applying color toners in the sequential order of black, cyan, magenta (or magenta, cyan), and yellow. In this manner, any contamination of previously applied toner by later applied toner will be less evident. An apparatus for performing this cascading color printing method is also disclosed. The invention further includes an apparatus for performing four-beam laser scanning of a photoconductor using a single rotatable, polygonal-sided mirror and as few as one laser.

Abstract: An operational amplifier includes transistors for providing a controlled current path. At least one of the transistors is in an isolated well in a substrate. Offset of the operational amplifier is corrected by applying a back gate bias voltage to at least one isolated well and changing impedance of the transistors. The proper back gate bias voltage and transistor impedance are determined by incrementally adjusting the back gate bias voltage and then incrementally adjusting the transistor impedance. Calibration values are stored in register memory. Such calibration may be performed by an auto offset calibration process.

Abstract: The present invention provides a new crossbar switch which is implemented by a first plurality of chips. Each chip is completely programmable to couple to every node in the system, e.g., from one node to about one thousand nodes (corresponding to present-day technology limits of about one thousand I/O pins) although conventional systems typically support no more than 32 nodes. The crossbar switch can be implemented to support only one node, then one chip can be used to route all 64 bits in parallel for 64 bit microprocessors. A second plurality of chips in parallel provides the redundancy necessary for a high availability system.

Abstract: A double-pass projection display system with separate polarizers and analyzers. One embodiment of the invention includes an input polarizer, a color separation/recombination device, and a number of image producing sections. The input polarizer receives unpolarized white light and polarizes this light. The color separation/recombination device receives the polarized white light and separates this light into a number of component color bands. The color separation/recombination device then supplies a component color band to each image producing sections. Each section includes a spatial light modulator and an output analyzer. The spatial light modulator modulates the color band that the image producing section receives from the color separation/recombination device. The output analyzer then (1) discards the light, in the modulated band, that has a first polarization state, and (2) directs the light, in the modulated band, that has a second polarization state to the color separation/recombination device.