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| Patent # | Description |
|---|---|
| US-5,574,751 |
Method for a soft-decision modulation system A soft-decision modulation system (10) has a transmitter (11) and a receiver (21). The transmitter encodes (68), modulates (72) and transmits (74-78) a data... |
| US-5,574,750 |
Methods and apparatus for detecting a cellular digital packet data
(CDPD) carrier Disclosed herein are methods and apparatus for detecting the presence of a CDPD carrier in a channel of a cellular system (although the invention is broadly... |
| US-5,574,749 |
Line interface apparatus and method for isolating data terminal
equipment from the line An improved isolation circuit for protecting data communication equipment from high voltages on a transmission line has two mixers. The first dual balanced mixer... |
| US-5,574,748 |
Spread spectrum communications system for network Spread spectrum chirps (i.e., wideband frequency packets) are propagated on a local area network in a hostile communications environment, such as a powerline or... |
| US-5,574,747 |
Spread spectrum adaptive power control system and method A system and method for adaptive power control of a spread spectrum transmitter of a mobile unit operating in a cellular-communications network having a... |
| US-5,574,746 |
Melting furnace for thermal treatment of special wastes containing heavy
metals and/or dioxin A melting furnace for thermal treatment of heavy metal-containing and/or dioxin-containing special wastes, including a clog preventing system including a... |
| US-5,574,745 |
Semiconductor devices incorporating P-type and N-type impurity induced
layer disordered material Novel semiconductor devices are monolithically defined with p-type and n-type wide bandgap material formed by impurity induced layer disordering of selected... |
| US-5,574,744 |
Optical coupler A substrate having a first surface and a second surface, the first surface having a vertical cavity surface emitting laser disposed therein and second surface... |
| US-5,574,743 |
Semiconductor diode laser having improved performance and method of
manufacturing same Semiconductor diode lasers are used inter alia in optical disc systems, laser printers, bar code readers, and glass fibre communication systems. Lasers having a... |
| US-5,574,742 |
Tapered beam expander waveguide integrated with a diode laser The present invention is directed to a semiconductor waveguiding structure which includes a) a first semiconductor waveguiding layer formed on a substrate, b) a... |
| US-5,574,741 |
Semiconductor laser with superlattice cladding layer A semiconductor laser device having a first conductivity type cladding layer, an active layer, and a second conductivity type cladding layer successively... |
| US-5,574,740 |
Deep blue microlaser A monolithic diode pumped solid-state laser (11) comprising as the laser host neodymium-doped yttrium orthovanadate (Nd:YVO.sub.4) (12, 52) or neodymium-doped... |
| US-5,574,739 |
Polarization-stable pulsed laser A pulsed laser includes a polarization section having a port, the polarization section being for receiving light at the port in a selected state of polarization... |
| US-5,574,738 |
Multi-gigahertz frequency-modulated vertical-cavity surface emitting
laser A GHz-range frequency-modulated laser based on manufacturable vertical cavity surface emitting lasers (VCSELs) and arrays. The present invention exploits a... |
| US-5,574,737 |
Modulator-demodulator device capable of detecting an unsynchronized
frame state based on hard and soft error values A modulator-demodulator device includes a transmitter side having an error control coding circuit for adding redundancy to a bit sequence to be transmitted from... |
| US-5,574,736 |
Data storage device and method of operation An improved storage device, such as a disk drive, for use in an array of drives. Each drive has logic and Exclusive Or calculation means. Data to be written is... |
| US-5,574,735 |
Error correction circuit which substitutes bits into data stream during
periods of data loss In an error correction circuit, when a data loss is detected, substitute data comprising all bits of "1" or "0" are generated during a data loss period and... |
| US-5,574,734 |
Test generation of sequential circuits using software transformations A process for generating a test set for a sequential integrated circuit that includes performing a transformation on a software model of the circuit to provide a... |
| US-5,574,733 |
Scan-based built-in self test (BIST) with automatic reseeding of pattern
generator A scan chain and method of generating non-successive pseudo-random test patterns for performing a built-in self test (BIST) on a circuit block in an integrated... |
| US-5,574,732 |
Test pattern generator A test pattern generator accompanying digital integrated circuits for successively generating a plurality of test patterns for a built-in self test. A plurality... |
| US-5,574,731 |
Set/reset scan flip-flops A set/reset scan flip-flop circuit normally inhibits set/reset operations in the scan mode, but allows a set/reset occurring in the last scan cycle to pass... |
| US-5,574,730 |
Bussed test access port interface and method for testing and controlling
system logic boards Apparatus and method that incorporate bussed test access port interface into a system control interface for testing and controlling system logic boards in a... |
| US-5,574,729 |
Redundancy circuit for repairing defective bits in semiconductor memory
device A semiconductor memory device includes a plurality of memory blocks, i main row or column select lines extending over the plurality of memory blocks, and a... |
| US-5,574,728 |
Methods of terminal registration In a data communication system (100) including infrastructure (101) arranged to communicate with a plurality of terminals (103) over a channel (109), a method of... |
| US-5,574,727 |
Cordless telephone system and communication method thereof The cordless telephone system according to the present invention comprises a synchronization inhibiting circuitry for inhibiting, when a calling station sends a... |
| US-5,574,726 |
Inter-repeater backplane An inter-repeater backplane that allows either synchronous or asynchronous data transmission between multiple repeaters integrated into a single hub and enables... |
| US-5,574,725 |
Communication method between a personal computer and communication module A personal communications system is described which includes components of software and hardware operating in conjunction with a personal computer. The user... |
| US-5,574,724 |
Adjustment of call bandwidth during a communication call Providing capability for increasing, decreasing, or changing types of bandwidth associated with a telecommunication call during the call and through out the call... |
| US-5,574,723 |
Remote provisioning of telephone channel unit using inband digital code
sequences transmitted over tandem link To remotely interrogate a telecommunications services channel unit resident in any office along a tandem network communication link, a control link establishment... |
| US-5,574,722 |
Protocol independent switch A data communications network providing for automatic reconfiguration of a hub concentrator or the like dependent on the protocol used by a device attached to... |
| US-5,574,721 |
Orthogonal code tracking system having phantom carrier signal An OCDMA communication system in which channel signals are bandwidth spread according to a PN code and each channel is identified by a selected one of a set of... |
| US-5,574,720 |
Traffic output suppression apparatus and method for preventing
congestion in asynchronous transfer mode network A traffic output suppression apparatus and a method for preventing congestion in an asynchronous transfer mode network. The apparatus includes an input cell... |
| US-5,574,719 |
Transmission system A wait-to-restore section corresponding to a first channel has a selector for switching an output side under the control of a mode setting section, and a timer... |
| US-5,574,718 |
Signal protection and monitoring system A redundancy switch (44) provides interfacing of network signals to spare network processors (46) in the event of a failure of a main network processor (42). A... |
| US-5,574,717 |
Line terminating equipment in SDH networks, using forward error
correcting codes In an optical transmission system applicable to a SDH network, communication between two line terminating equipments is performed in a form of a STM frame... |
| US-5,574,716 |
Optical disc protective storage device An optical disc accommodation or storage device permitting storage of an optical disc in a readily visible, neat and stable state, while also permitting the... |
| US-5,574,715 |
Optical recording medium An optical recording medium having a recording layer and a reflective layer closely stacked on a substrate, wherein recording is carried out by directing... |
| US-5,574,714 |
Amplifier with peak and bottom signal level shifting control A signal level adjusting unit adjusts levels of EFM signals, read from an optical disk, to given levels, and comprises a peak value detector, a peak value... |
| US-5,574,713 |
Method for controlling an optical recording device for improved
recording mark detection It is an object of the present invention to reduce a data error ratio in the mark edge recording method. In this invention, a corrected value of a record pulse... |
| US-5,574,712 |
Detector matrix for acquiring track data from multiple tracks A method of reading data from an optical disk comprises providing means for illuminating the required part of the disk and acquiring the optical image of a... |
| US-5,574,711 |
Device for driving trays in disk players A disk transport mechanism for moving disks into a disk-player transports disks between an eject position and a playback or storage position inside the... |
| US-5,574,710 |
Disc reproducing apparatus In a reproducing apparatus for an optical disc recorded at a constant linear velocity (CLV), so as to increase the reproducing access speed, a first clock... |
| US-5,574,709 |
Automatic gain control system and information reproduction apparatus
using it An AGC system controls the amplitude of a reproduction signal read out from a recording medium at a predetermined level by adjusting the gain of an AGC... |
| US-5,574,708 |
Optical disk apparatus performing data writing test An optical disk apparatus in which a write cache processing is executed, comprising a writing function for writing test data to a predetermined area of the... |
| US-5,574,707 |
Pulse width control apparatus for optical disk When the header portion of an optical disk is read, a recording pulse width for the optical disk is corrected. The recording pulse width is determined by the... |
| US-5,574,706 |
Focus offset optimization for reading optically recorded data During recording or reading of data in an optical record carrier such as a disc, focus is optimized by adding a focus offset signal to the focus servo error... |
| US-5,574,705 |
Vibration resistant disc selectable player A player for selecting and playing a disc (such as a CD) capable of accurately locating its moveable portion for selecting and playing the disc and accurately... |
| US-5,574,704 |
Header searching method and apparatus in a data recording medium On loading a CD-ROM, which is a data recording medium, onto a reproducing device, a time information of a sub-code is read out, and then, a time information of a... |
| US-5,574,703 |
Magneto-optical method and apparatus for recording/reproducing data To directly overwrite data on a magnito-optical recording medium formed of two exchange-coupled magnetic layers of a memory layer with a high coercive force and... |
| US-5,574,702 |
Magnetic head current control circuit for use in a magnetic head drive
device, and magnetic/magnetooptical... A magnetic head drive device includes a pair of auxiliary coils, a pair of switch elements respectively connected in series with the pair of auxiliary coils, and... |
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