Patent application number | Description | Published |
20090237285 | DIGITAL TO ANALOG CONVERTER SPUR CANCELLATION - A device includes an upsampling digital-analog converter (DAC) and logic to add a DC offset to a signal input to the DAC, the logic adapted to set the DC signal to cancel a DAC output spur. | 09-24-2009 |
20090237767 | PREDISTORTION USING FPGA - Predistortion logic for an optical communications laser or optical modulator, includes predistortion logic embodied in a field programmable gate array (FPGA). A first analog to digital converter (ADC) provides a representation of an RF signal at an input of the FPGA. A digital to analog converter provides a representation of an output of the FPGA to a laser or modulator. | 09-24-2009 |
20090256655 | Anti-Parallel Pi Pin Attenuator Structure with Improved CSO Performance - An RF attenuator circuit includes an anti-parallel PI structure having an input shunt arm comprising a single PIN diode, and an output shunt arm comprising a single PIN diode configured to have opposite polarity of the PIN diode of the input shunt arm. | 10-15-2009 |
20090263141 | DUAL USE OF TEST POINT POWER MONITOR - A channel alignment system in an optical communication network includes logic to sample power of a quadrature amplitude modulation (QAM) channel at a component downstream from a QAM modulator. The system determines if the sampled channel power has a sufficient level. The system signals power control logic of the QAM modulator to adjust a gain of the sampled channel. | 10-22-2009 |
20110267670 | BIAS POINT CONTROL CIRCUIT FOR EXTERNALLY MODULATED TRANSMITTER - Methods and apparatuses for controlling a bias point voltage for an external optical modulator are provided. A control loop is used to adjust a bias signal applied to an external modulator by determining unwanted signals at a predetermined frequency received by an optical receiver of the control loop and accounting for these unwanted signals when determining the bias point voltage. | 11-03-2011 |
20120213515 | SERVICE GROUP AGGREGATION - Methods and systems for aggregating service groups are provided. A chain of fiber nodes in a DOCSIS system is formed to aggregate the service groups served by the fiber nodes to form a super-service group. Multiple channels of a multiplexed data stream are used to transmit the signals from the super-service group. By creating a chain of fiber nodes and using multiple channels to transmit the signals from the super-service group, a DOCSIS system can be more efficiently reconfigured to segment a super-service group once the system has become exhausted. | 08-23-2012 |
20120308237 | MITIGATING NOISE AND OBI IN RFOG NETWORKS - A bi-directional optical transceiver includes multiple single mode optical ports and a multi-mode optical port. A multi-mode optical combiner combines single mode optical signals received at the single mode optical ports into a multi-mode optical signal at the multi-mode optical port. Each single mode optical signal has a distinct optical mode that does not interfere with the optical mode of the other single mode optical signals. A photo detector detects a total optical power of the plurality of single mode optical signals in the multi-mode optical signal. An amplifier is coupled to receive an output of the photo detector. | 12-06-2012 |
20130004173 | OVERLAY SYSTEM WITH DIGITAL OPTICAL TRANSMITTER FOR DIGITIZED NARROWCAST SIGNALS - Methods and apparatuses are provided to modify existing overlay system architectures in a cost effective manner to meet the growing demand for narrowcast services and to position the existing overlay systems for additional future modifications. The implementations of the improved overlay system of this disclosure re-digitize narrowcast analog signals after they have been QAM modulated and upconverted to RF frequencies and replace the analog narrowcast transmitters with digital narrowcast transmitters. In the fiber nodes, the received narrowcast signals are converted back to analog signals and combined with analog broadcast signals for transmission to the service groups. | 01-03-2013 |
20130071120 | DIGITIZER FOR USE IN AN OVERLAY SYSTEM WITH DIGITAL OPTICAL TRANSMITTER FOR DIGITIZED NARROWCAST SIGNALS - Methods and apparatuses are provided to digitize an analog multi-channel RF narrowcast signal in an overlay system by dividing the signal into a plurality of subband signals and digitizing each subband signal using practical A/D converters. | 03-21-2013 |
20130090537 | BLOOD GLUCOSE SENSOR - A method to measure glucose within the blood of a tissue test area includes illuminating the tissue test area using a single mode light source at a point of incidence, with at least some of the light penetrating tissue at the point of incidence; calibrating the light source by adjusting a distance between the point of incidence and an axicon lens; collecting returning radiation from the tissue test area at a point offset from the point of incidence; removing tissue fluorescence using edge filters; removing additional tissue fluorescence by shifting the excitation wavelength of the single mode light source; heating the test area; and analyzing a returned Raman signal to determine the glucose within the blood. | 04-11-2013 |
20130301659 | FLOW CONTROL IN A NETWORK DEVICE - “A process of scheduling stream packets for output from a multiplexing network device involves prioritizing the output of packets first according to stream priority, and within a particular priority, by stream ID.” | 11-14-2013 |
20130308654 | FLOW CONTROL IN A NETWORK DEVICE - A network device includes output rate control logic having variable bandwidth and a response time constant that increases according to an amount of time that an input rate of data to the network device is evaluated by the control logic. | 11-21-2013 |
20140128742 | CANCER TISSUE DETECTION AND DIAGNOSIS USING LASER FLUORESCENCE - A laser diagnostic system includes multiple lasers providing incident light on a sample, the light modulated and cooperatively phased to stimulate red emissions from the sample; and a detector coupled to a spectrum analyzer, to detect both the incident light and the red emissions from the sample, and to provide a signal indicating detection of a pathology in the sample. | 05-08-2014 |
20140205176 | OPTICAL PLATELET COUNTER METHOD - Platelets or blood cells are detected in a fluid sample by adjusting a focal depth of a microscope through a range of values, the microscope having a mounted sample and an objective lens adapted with one or both of (a) a spherical aberration correction unmatched to a utilized cover plate for the sample, or (2) a numerical aperture unmatched to a utilized illumination source for the sample. Images are recorded at different specific focal depths and in multiple z planes of a fluid bearing the platelets, where the position of platelets may overlap on different of the multiple z planes that are recorded, the images recorded through the cover plate, thus causing the generation of a specific light-dark pattern indicative of platelets at particular positions and at multiple depths in the fluid media. The images are analyzed for the specific light-dark pattern. | 07-24-2014 |
20140333035 | GASKET PRESSURE SENSOR - A system to measure forces on a gasket includes a gasket formed with an inner ring, an outer ring, and a winding disposed between the inner and outer rings, and at least one force sensor positioned perpendicular to the outer ring. | 11-13-2014 |
20140348511 | Mitigating Noise and OBI in RFoG Networks - A bi-directional optical transceiver includes multiple single mode optical ports and a multi-mode optical port. A multi-mode optical combiner combines single mode optical signals received at the single mode optical ports into a multi-mode optical signal at the multi-mode optical port. Each single mode optical signal has a distinct optical mode that does not interfere with the optical mode of the other single mode optical signals. A photo detector detects a total optical power of the plurality of single mode optical signals in the multi-mode optical signal. An amplifier is coupled to receive an output of the photo detector. | 11-27-2014 |
20150043918 | Double Capacity Pluggable Optics - The methods, systems, and apparatuses described in this disclosure enable the use of pluggable optics such that two outgoing connections or two incoming connections can support the use of dual transmitter optics and/or dual receiver optics. The forward and/or reverse capacity of an optical network can be doubled using two transmitters and/or receivers operating in parallel. In embodiments, forward and/or reverse capacity of an optical network can be doubled using a double capacity transmitter or receiver that is operable to combine two or more electrical signals into a single optical signal. A pluggable can support two transmitting or two receiving optical links, and can also support a double capacity transmitting or receiving optical link. | 02-12-2015 |
20150049822 | PILOT TONE FOR AMPLIFIER BIAS POINT - Methods and systems for using a signal to generate a pilot tone to modulate the bias point of an amplifier that amplifies the signal. | 02-19-2015 |
20150050023 | Frequency Sub-Band Coding of Digital Signals - A transmitter, using frequency sub-band coding, can output a plurality of narrowcast and/or broadcast signals to a plurality of sub-groups or nodes along a single optical link. The transmitter can output the plurality of signals as multiple slices of spectrum, wherein each slice of spectrum is designated for a particular sub-group or node. The transmitter can further instruct each receiver or node as to which slice of spectrum to use and at which frequency to output the associated signal information to its intended subscribers. Thus, a single transmitter can feed narrowcast information to multiple nodes or receivers along a single optical link. In embodiments, channels can be monitored and manipulated on a channel-by-channel basis, and channels delivered using different network solutions can be combined. | 02-19-2015 |
20150050025 | Digitized Broadcast Signals - Methods, systems, and computer-readable media can facilitate digitizing a broadcast transmission and transporting the digitized broadcast transmission along with one or more digitized narrowcast transmissions to a subscriber. In embodiments, a digitized broadcast transmission and one or more digitized narrowcast transmissions can be separately demodulated and the transmissions can be combined at one or more receiving nodes. In embodiments, a digitized broadcast transmission can be combined with one or more digitized narrowcast transmissions. Lossless compression and de-compression techniques can be used to optimally transport digitized broadcast and narrowcast signals. | 02-19-2015 |
20150052572 | R-CCAP WITH AM STAR ARCHITECTURE - A remote node system with an amplitude modulation (AM) star architecture is formed between a remote node and a plurality of field nodes split from the remote CCAP node. In embodiments, an R-CCAP node can be combined with amplitude modulation (AM) optics in a star architecture for building low power nodes, supporting set top box (STB) out of band (OOB) signals, and increasing system bandwidth (BW). The remote node can be implemented in media content delivery networks, such as a hybrid fiber-coax HFC network or evolving radio frequency over glass (RFoG) networks. | 02-19-2015 |
20150052573 | FIBER-OPTIC NODE WITH FORWARD DATA CONTENT DRIVEN POWER CONSUMPTION - Methods and systems for modulating an amplifier power supply to efficiently attain amplified RF output power with much lower power dissipation than existing amplifiers. | 02-19-2015 |