An apparatus is provided for detecting the loss of an input clock signal for a phase-locked loop (PLL). The apparatus includes a time delay circuit, a first frequency divider and a digital logic circuit. The time delay circuit receives the input clock signal and outputs a first time-delayed clock signal. The first frequency divider receives an input signal from an internal clock of the PLL and outputs a clock signal having the same frequency or a lower frequency than that of the time-delayed clo...

A receiver correlator structure for an ultra wide bandwidth communication system includes an antenna, a mixer, a bandpass filter, and a convertor. The receiver receives, via the antenna, an ultra wide bandwidth signal comprising a sequence of wavelets of particular shapes and positions, and transmits the received ultra wide bandwidth signal to the mixer. The mixer also receives and mixes with the received ultra wide bandwidth signal a local ultra wide bandwidth signal comprising a sequence of wa...

A code detector which may rapidly obtain initial code synchronization by generating different phases of a pseudo noise (PN) codes by a plurality of PN code generators. Also, the code detector implements multipliers in the code detector to perform simple and rapid multiplying operations of the output of the PN code generators.

The invention pertains to optical fiber transmission systems, and is particularly relevant to transmission of large volumes of data over long distances at high rates. An improved apparatus and method for measuring dispersion in a fiber span is disclosed. In particular, the invention teaches a highly accurate technique for measuring the fiber dispersion at a single wavelength. Transmitter and receiver structure and data processing algorithms are disclosed. An improved apparatus and method for mea...

A method for resolving address contention and prioritization of access to resources within a shared memory system includes dynamically creating ordered lists of requests for each contested resource. A new request is added to the lists only after a conflict is recognized. Since the resource conflict does not always exist, there is no impact to a request for an uncontested resources.

A computer architecture and programming model for high speed processing over broadband networks are provided. The architecture employs a consistent modular structure, a common computing module and uniform software cells. The common computing module includes a control processor, a plurality of processing units, a plurality of local memories from which the processing units process programs, a direct memory access controller and a shared main memory. A synchronized system and method for the coordin...

Many conventional lock-free data structures exploit techniques that are possible only because state-of-the-art 64-bit processors are still running 32-bit operating systems and applications. As software catches up to hardware, "64-bit-clean" lock-free data structures, which cannot use such techniques, are needed. We present several 64-bit-clean lock-free implementations: including load-linked/store conditional variables of arbitrary size, a FIFO queue, and a freelist. In addition to being portabl...

A mechanical take down device in a circular, particularly double cylinder knitting machine. The device includes two circular parts, one being full and solid and fitting into the other part, while the fabric passes between them. One of the parts has a screw-threaded surface and the neighboring surface of the other part is circular in shape and its slant equals that of the screw-threaded surface. One of the parts does not rotate, while the other rotates and is coupled with the needle cylinder.

An x-ray diagnostics installation having a primary radiation diaphragm disposed in the beam path of an x-ray tube includes a control unit for the primary radiation diaphragm having an operator-manipulable setting element and associated circuitry which cause the primary radiation diaphragm to move in directions corresponding to the direction of movement of the setting element. Rotary motion of the setting element causes rotation of the primary radiation diaphragm, and pivoting of the setting elem...

A handbag is disclosed having an enclosure which defines a major compartment for receiving and retaining articles, a credit card holder for holding at least one credit card, a minor compartment defined within the major compartment for reception of the credit card holder, and a connecting member for attaching the credit card holder with respect to the minor compartment in a manner which permits insertion of the credit card holder into the minor compartment and withdrawal of the credit card holder...