Microsemi Frequency and Time Corporation Patent applications |
Patent application number | Title | Published |
20140361768 | CHIP-SCALE ATOMIC GYROSCOPE - Apparatuses and methods for sensing rotations are provided. One embodiment of the apparatus includes a cell containing alkali and active nuclear magnetic resonance (NMR) isotope(s) atoms, a magnet providing a first magnetic field, a light source, and optics which circularly polarize light to generate a pump beam for optically pumping the alkali atoms and, together with a second magnetic field orthogonal to the first magnetic field or a modulation of the light, causing the alkali and the NMR isotope atoms to precess about the first magnetic field. The apparatus further includes a partial reflector opposite the light source and configured to, in conjunction with a first linear polarizer, generate a reflected linearly-polarized probe beam from a portion of the pump beam, and one or more polarizing beam splitters configured to split light of the probe beam incident thereon into orthogonally polarized components that are detected and used to determine rotations. | 12-11-2014 |
20140269672 | DISTRIBUTED TWO-STEP CLOCK - The present invention generally relates to methods and apparatus for precision time transfer wherein the inherent packet delay variation and possible asymmetry introduced in networks is avoided or mitigated. In one embodiment, the timing functions of a master device may be placed closer to a slave device using a Remote Time-Stamp Generator, located in the network between the master and the slave, and whose time reference serves as a proxy for the time reference of the master. Time-of-traversal of packets at the remote time-stamp generator may be used as proxies for the time-of-departure and the time-of-arrival of certain messages at the master. Such proxy times may be used to synchronize the slave with the master, particularly if the master and the Remote Time-Stamp Generator are both synchronized with a Global Navigation Satellite System (GNSS) source. | 09-18-2014 |
20140241244 | DISTRIBUTION OF LOCATION INFORMATION - In one aspect, a method of determining a geographical location of a base station is provided. The base station is within a coverage area of a master base station and requests geographical location information from the master base station through a first Precision Time Protocol (PTP) management message. The base station receives the geographical location information from the master base station through a second PTP management message. In addition, the base station determines the geographical location of the base station from the geographical location information included in the second PTP management message. | 08-28-2014 |