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US20080056727 Optical transmitter and drive method of same  
An optical transmitter for performing optical phase modulation according to a data signal and further applying optical intensity modulation in synchronization with clock signals and transmitting...
US20070122159 PASSIVE OPTICAL NETWORK MEDIA ACCESS CONTROLLER ASSISTED CLOCK RECOVERY  
A system, method, and computer readable medium for passive optical network media access controller assisted clock recovery which enables an optical receiver to recover a clock phase of an incoming...
US20130121705 METHOD FOR DISTRIBUTING TIME WITHIN SYNCHRONOUS ETHERNET AND SONET/SDH DOMAINS  
The embodiments of the present invention pertaining to a method for distributing time between a first and a second Synchronous Ethernet “SyncE” domain, said first and second domains being...
US20060165418 Optical signal switching network using method of sub-harmonic embedded clock transmission  
An optical signal switching network having a transmitter and a receiver, wherein the transmitter includes a data generator for generating a data signal and a clock signal having the same frequency...
US20150188695 Method and Apparatus for Synchronizing Clocks Underwater Using Light and Sound  
Methods and systems for synchronizing clocks used in underwater devices is described. All clocks have some drift due to frequency accuracy and this disclosure provides a method for periodically...
US20070019966 Optical transceiver module and control method thereof  
An optical transceiver module for transmitting an optical signal includes a receiver, a clock data recovery circuit and a controller. The receiver receives the optical signal and converts the...
US20140270802 QUANTUM SYNCHRONIZATION FOR CLASSICAL DISTRIBUTED SYSTEMS  
A quantum mechanical synchronization system for a classical distributed computing system. Einstein-Podolsky-Rosen links are established providing entangled photons to provide the quantum...
US20080170859 System and method for multi-rate, high-sensitivity clock and data recovery with adjustable decision threshold, RF input, and optical-to-electrical conversion  
The present invention provides a system and method for multi-rate, high-sensitivity CDR, including a variable/adjustable decision threshold, RF input clock recovery, and OE conversion feature. The...
US20070133999 Low emission signal generator and distribution system  
A low emission signal manipulating circuit for reducing emission of a given signal. This is accomplished by manupulating the signal and recovering the original signal. The inventive device...
US20070127930 Skew correction system eliminating phase ambiguity by using reference multiplication  
A system for generating a local clock signal, the system including: a skew correction circuit for receiving first and second periodic signals that have associated skews, wherein the skew...
US20090003835 Optical clock recovery apparatus and method and birefringent medium  
An optical clock signal recovery apparatus includes a mode-locked semiconductor laser that generates an optical pulse train polarized in a first direction. Optical components of the apparatus...
US20100098433 SYNCHRONIZATION TRANSPORT OVER PASSIVE OPTICAL NETWORKS  
One embodiment provides an Ethernet Passive Optical Network (EPON) system for clock transport. The system includes a reference clock configured to generate a frequency-reference signal, an optical...
US20080080870 System for extracting a clock signal from optical signal including plural clock frequencies and a method therefor  
In a clock signal extraction system, an optical modulator modulates an input optical signal having its clock frequency equal to a first or second frequency with a modulation electrical signal...
US20080131139 Optical data link stably operable for duplicated reset  
The preset invention provides an optical data link that prevents the internal I2C bus system from being hung up. The data link provides a CPU able to receive a reset signal and an IC (PHY) to...
US20140270805 Asymmetry Correction for Precise Clock Synchronization Over Optical Fiber  
A clock at a first network element that is connected to a second network element over an optical fiber link is aligned in time/phase using packet protocols such as PTP. The invention discloses how...
US20050271390 Optical clock extraction circuit  
An optical clock extraction circuit that can be fabricated at low cost and suppress jitter is achieved. The optical clock extraction circuit extracts an optical clock signal phase-locked to a...
US20100086313 Optical Signal Phase Regenerator for Formats of Differential Modulation with Phase Changes  
The invention relates to a device for regenerating the phase of an optically modulated signal with phase changes and based on two and three replicas, wherein the replicas refer to the number of...
US20100046959 Phase Lock Loop Control For Digital Communication Systems  
An optical receiver includes an optical detector that is positioned to detect an optical data signal received from an optical channel generates a received electrical data signal at an output. An...
US20080124092 Burst mode clock and data recovery circuit and method  
Burst mode clock and data recovery (BCDR) circuit and method capable of fast data recovery of passive optical network (PON) traffic. An over-sampled data stream is generated from an input burst...
US20070230966 Single interface with automatic rate detection and selection for multiple optical communication standards  
An optical communication interface for insertion into an optical network is capable of automatically recovering an embedded clock from a received optical signal across multiple communication...
US20060280055 Laser power control and device status monitoring for video/graphic applications  
Signals, such as the +5V signal, the HPD signal, and LOS output from DDC, CEC, or HDMI signals are dynamically monitored, whereby a stand-by mode is entered in the absence of signal activity in...
US20070127929 Signal regeneration device, optical receiver, and signal processing method  
A signal regeneration device which makes an extracted clock signal highly accurate while maintaining superior receiving sensitivity. To this end, a device of the present invention is configured to...
US20080085124 Clock generation with minimum number of crystals in a multimedia system  
An apparatus comprising a first circuit and a second circuit. The first circuit may be configured to present a transport stream having (i) audio/video data, (ii) video presentation time stamps,...
US20050141898 System for all-optical clock recovery  
Provided is a system for all-optical clock recovery that can reduce a pattern effect and timing jitter of an optical clock. The system includes an optical signal controller that controls the...
US20070166047 OPTO-ELECTRIC PHASE-LOCKED LOOP FOR RECOVERING THE CLOCK SIGNAL IN A DIGITAL OPTICAL TRANSMISSION SYSTEM  
A phase-locked loop for a differential recovery of the clock signal wherein an extracted data signal (DS) is conveyed via a phase delay element and thence to a phase comparator. In the phase...
US20150110501 DIRECT-COUPLED DRIVER FOR MACH-ZEHNDER OPTICAL MODULATORS  
An optical modulator device directly-coupled to a driver circuit device. The optical modulator device can include a transmission line electrically coupled to an internal VDD, a first electrode...
US20090154937 APPARATUS FOR RESTORING CLOCK SIGNAL BY USING CIRCULATOR  
Provided is an apparatus and method for restoring clock signals by using a circulator in an optical transmission system. The apparatus includes a circulator, which allows one of N types of input...
US20090097854 OPTICAL SIGNAL PROCESSING APPARATUS  
An O/E conversion element converts an input NRZ optical signal into an electric signal. A clock recovery circuit recovers a clock signal from the electric signal obtained by the O/E conversion...
US20070133998 Network with sourceless clients  
A first node receives a first phase modulated optical signal at a first wavelength from a master node. The first node also transmits a first amplitude modulated optical signal to the master node...
US20090148155 OPTIMIZED CDR APPLICATION FOR VARIABLE DATA RATE SIGNALS IN SFPs FOR JITTER REDUCTION  
Systems and methods for conditioning an optical signal are provided for applications which require management of both low and high-data-rates. Upon receipt of a data signal, a determination is...
US20080118246 Encoding and decoding architecture and method for pipelining encoded data or pipelining with a look-ahead strategy  
An encoding and/or decoding communication system comprises a framer interface, an encoder, a multiplexer, an output driver, and a clock multiplier unit (CMU). The encoder includes an input latch...
US20090324245 OPTICAL TRIGGERED SELF-TIMED CLOCK GENERATION  
A self-timed clock circuit and method of generating a self-timed clock circuit. The circuit includes means for charging a circuit node in response to an external reset signal; means for...
US20070264026 Method and apparatus for controlling phase of a clock signal  
A method and corresponding apparatus are disclosed for controlling the phase of a second clock signal from (i) a first clock signal of different frequency and (ii) a synchronization signal. One...
US20060280506 Clock extracting apparatus  
A clock extracting apparatus is provided. In the clock apparatus, two frequency components are made to have an equal magnitude by adjusting a temperature and current applied to an FP LD, and a...
US20090297165 Optical transmitting apparatus and optical communication system  
A waveform converting unit gives a change to a clock signal as a periodic voltage fluctuation that drives a pulse carver unit carrying out shaping into an RZ waveform. The pulse carver unit...
US20080205901 METHOD AND APPARATUS FOR DWDM LINE CARD  
A system and method for multiple-channel line card. The system includes a first photonic integrated device configured to receive a first optical signal and output a first plurality of electrical...
US20110008055 Combined Burst Mode Level and Clock Recovery  
An apparatus comprising an optical receiver configured to receive an optical signal, and a combined level and clock recovery circuit coupled to the optical receiver and configured to update a...
US20060083518 Fiber optic connection for digital displays  
A digital graphics connection such as a DVI connection uses an optical fiber for transmissions representing a clock signal and parallel pixel data channels. In one embodiment, a DVI cable includes...
US20090196619 Systems and Methods for Optical Carrier Recovery  
In one embodiment a system and method pertain to generating a pump from a received optical signal, inputting the generated pump into a phase-sensitive oscillator, and amplifying a carrier...
US20120294625 COMMUNICATION SYSTEM AND METHOD  
A communication system comprising an emitter of weak light pulses, a detector which is capable of detecting single photons, and a source of a clock signal, wherein said emitter and detector are...
US20050129411 Apparatus and method for optimizing bias voltage of electro-optic modulator and optical transmitting system using the same  
Provided are an apparatus for optimizing bias voltage of an electro-optic modulator, a method therefor, and an optical transmission system using the method. The present research provides a bias...
US20080138082 APPARATUS AND METHOD FOR GENERATING OPTICAL RETURN-TO-ZERO SIGNAL  
Provided are an apparatus and method for generating an optical return-to-zero (RZ) signal using an electronic integrated circuit that generates an electric RZ signal. The apparatus for generating...
US20090016738 COMPACT ALL-OPTICAL CLOCK RECOVERY DEVICE  
A clock recovery device adapted to recover at least one clock signal from an optical input signal. The input signal includes at least one data signal. The clock recovery device-includes a first...
US20150003842 CLOCK RECOVERY CIRCUIT, OPTICAL RECEIVER, AND PASSIVE OPTICAL NETWORK DEVICE  
The present invention discloses a clock recovery circuit, an optical receiver, and a passive optical network device. In the clock recovery circuit provided by the embodiment of the present...
US20100166434 SUBSCRIBER LINE INTERFACE CIRCUITRY WITH INTEGRATED SERIAL INTERFACES  
Methods and apparatus for communicating include communicating frames of data at a frequency f1 serially from a first device to a second device using a first unidirectional data line. The frames...
US20090060525 ALL-OPTICAL POLARIZATION-INDEPENDENT CLOCK RECOVERY  
Simultaneous recovery of several different clock signals is based on coupling an optical input signal into an optical resonator matched with at least four spectral peaks of the input signal. The...
US20070134000 Polarization division multiplexed optical transmission system  
Provided is a polarization division multiplexed optical transmission system including a transmitter and a receiver. The transmitter includes a first light source generating an optical signal...
US20170180070 Method and Apparatus for Determining Propagation Delay in a Communications Network  
A method and apparatus for determining propagation delay of a first path and or of a second path which connect a first transceiver unit associated with a first clock to a second transceiver unit...
US20170078082 MULTIMEDIA SIGNAL TRANSMISSION DEVICE AND TRANSMISSION METHOD THEREOF  
A multimedia signal transmission device includes: a clock signal detector for detecting a clock signal from a signal source and generating a clock index which specifies a frequency of the clock...
US20170012726 OPTICAL TRANSMISSION APPARATUS AND OPTICAL RECEPTION APPARATUS  
An optical transmission apparatus that accommodates client signals in a line signal, includes: an OPUn mapper unit that receives and maps the client signals; and a mapping control unit that...

Matches 1 - 50 out of 59 1 2 >