Abstract:
A peripheral resource controller such as a caching disk array controller is provided for controlling the transfer of data between a host bus and a peripheral resource, such as an array of hard disk drives. The peripheral resource controller includes a bus interface controller for providing an interface between the host bus and a local bus of the peripheral controller. The bus interface controller further includes a peripheral bus interface which accommodates accesses to a peripheral bus and a DMA controller for controlling direct memory access operations between a local memory of the peripheral controller and a system memory of the host computer. A DMA transfer list memory is coupled to the peripheral bus for storing DMA transfer information. The DMA controller fetches host and local address as well as block size information from the DMA transfer list memory to thereby effectuate DMA operations. In one specific implementation, a local processor of the peripheral controller loads the DMA transfer information into the DMA transfer list memory by causing the execution of one or more memory write cycles on the local bus. A local bus interface of the bus interface controller responds as a target and routes the data to a peripheral bus interface. The peripheral bus interface, which functions as a master of the peripheral bus, responsively effectuates corresponding cycles on the peripheral bus to write the DMA transfer information into the DMA transfer list memory.
Abstract:
In a system for data exchanges without physical contact between a generally mobile portable set and a terminal or a population of generally fixed terminals, it is sought to make a modular set comprising a portable object (notably a memory card) that can be inserted either into a transceiver device, or in an ISO reader for by example, by saving on an interface management system and by reducing the power consumption of the set to the minimum. The transceiver device is without any microprocessor, and the portable object houses means for the management notably of the transmission/reception protocol of the portable set and of the ISO 7816-3 protocol.
Abstract:
A digital data storage system which does not require the use of moving, mechanical components, and which utilizes semiconductor memory elements. In one embodiment, the digital data storage system includes a ROM, a system control microcomputer, a digital signal processor (DSP), and a D/A converter. In operation, the DSP is responsive to control signals generated by the system control microcomputer for reading out digital data, e.g., digital audio data, stored in the ROM, and decoding the read-out digital data. The D/A converter functions to convert the decoded read-out digital data into an analog output signal, e.g., an analog audio signal, and to supply the analog output signal to an output terminal. The digital data storage system of this embodiment is a playback-only system. In another embodiment, the digital data storage system includes all of the elements of the above-described embodiment, and further includes an A/D converter and an EEPROM, to facilitate the recording of digital data. In operation, during a record mode of operation, the A/D converter functions to convert an input analog signal, e.g., an analog audio signal, into an input digital data signal, and the DSP functions, in response to the control signals, to write the input digital data signal into the EEPROM. The digital data storage device of this embodiment functions as a record/playback system.
Abstract:
Disclosed are self-contained high electrical charge density entities, generated in electrical discharge production. Apparatus for isolating the high charge density entities, selecting them and manipulating them by various guide techniques are disclosed. Utilizing such apparatus, the paths followed by the entities may be switched, or selectively varied in length, for example, whereby the entities may be extensively manipulated. Additional devices are disclosed for the manipulation and exploitation of these entities, including their use with a camera and also in an oscilloscope, as well as their use in generating RF radiation. A flat panel display is disclosed which is operated by these charge entities, up to the point of their generating electrons to strike a phosphor screen.
Abstract:
Disclosed are self-contained high electrical charge density entities, generated in electrical discharge production. Apparatus for isolating the high charge density entities, selecting them and manipulating them by various guide techniques are disclosed. Utilizing such apparatus, the paths followed by the entities may be switched, or selectively varied in length, for example, whereby the entities may be extensively manipulated. Additional devices are disclosed for the manipulation and exploitation of these entities, including their use with a camera and also in an oscilloscope, as well as their use in generating RF radiation. A flat panel display is disclosed which is operated by these high charge entities, up to the point of their generating electrons to strike a phosphor screen.
Abstract:
Disclosed are high electrical charge density entities, generated in electrical discharge production. Apparatus for isolating the high charge density entities, selecting them and manipulating them by various guide techniques are disclosed. Utilizing such apparatus, the paths followed by the entities may be switched, or selectively varied in length, for example, whereby the entities may be extensively manipulated. Additional devices are disclosed for the manipulation and exploitation of these entities, including their use with a camera and also in an oscilloscope.
Abstract:
Control of a plurality of relay drivers by smart control devices and the continuous status monitoring of a plurality of switches and associated smart sensors, wherein each smart control device and each smart sensor is connected at a separate single point on a single-wire bus, are affected by a smart control and sensor device multiplex system. The system employs a microcomputer and a driver and receiver circuit for developing a particular offset square wave pulse train which is placed on the bus to provide power and control voltage signals to the plurality of smart control devices and smart sensors. The smart control devices contain circuits that respond to the wave form in a manner that causes each smart control device to drive an associated relay driver after a chosen number of polling cycles. Current signals are sent over the bus back to the driver and receiver indicative of the status of the smart control device. The smart sensors contain cirucits that respond to the waveform in a manner that causes each smart sensor to send current signals back over the single wire bus to the driver and receiver circuit and then on to the microcomputer during designated repetitive and sequential time slots. The driver and receiver circuit receives, interprets and converts the current signals from the smart control devices and the smart sensor into voltage signals used by the microcomputer for establishing a history of the status of the bus, the control devices, the sensors and the switches. The microcomputer supplies continuous and updated information to a display system indicative of the status of each control device and each sensor and its assoicated switch.
Abstract:
In a color cathode ray tube, a vacuum envelope is provided with a plurality of necks and a plurality of funnels for coupling the respective neck to a single panel. A plurality of electron gun assemblies are received in the neck, respectively and a plurality of deflection yokes are mounted around the funnels, respectively. A screen is formed on the inner surface of the faceplate of the panel and is defined by a plurality of continuous segment regions each of which is scanned with electron beams from the corresponding electron gun assembly and deflected by corresponding deflection yoke. A shadow mask is received in the panel and is faced to the screen. The shadow mask has a plurality of effective row and column regions corresponding to the segment regions and a noneffective region for surrounding and partitioning the respective segment regions.
Abstract:
An electron beam generating system provides a high degree of steadiness of the beam current and comprises a heated cathode, an auxiliary electrode lying at a more negative potential than the cathode, and a transpierced anode. A diaphragm surrounding the beam and connected to a precision resistor is further provided at that side of the auxiliary electrode facing away from the cathode. A portion of the beam current influenced by the control electrode is blanked out by the diaphragm. The precision resistor is connected as an actual value generator to a regulator which is connected to a reference voltage, the output of the regulator influencing the potential of the control electrode over a final control element for the purpose of maintaining the beam current measured by the diaphragm constant.
Abstract:
A tube for irradiation equipment for limiting an emergent beam, with a baseplate, possessing a central aperture, intended for attaching to the equipment, as well as four carrier plates, each of which possesses a limiting edge and a sliding edge located at right angles thereto. The carrier plates are located parallel to the baseplate, the limiting edge of each carrier plate resting against the sliding edge of the adjacent carrier plate and each of the two mutually opposite pairs of carrier plates being displaceable, parallel to the direction of its sliding edges and symmetrically to the center of the transmission aperture, for the purpose of continuously varying the transmission aperture defined by the limiting edges, during which displacement each of the displaced carrier plates carries with it the carrier plate, resting against the limiting edge of the former plate, parallel to the direction of the limiting edge of the latter plate.