Sigma Designs Patent Applications

HIGH-PERFORMANCE ZERO-CROSSING DETECTOR

Granted: May 1, 2014
Application Number: 20140118028
A zero-crossing detection circuit includes a comparator and circuitry. The comparator produces an output signal that is indicative of zero-crossing events in an input Alternating Current (AC) waveform. The circuitry may be configured to feed the comparator with first and second rails voltages, and to progressively increase the rails voltages during time intervals derived from the input AC waveform, so as to feed the comparator with target values of the rails voltages in time-proximity to…

NODE REPAIR IN A MESH NETWORK

Granted: April 10, 2014
Application Number: 20140098658
In embodiments of the present invention improved capabilities are described for sensing a change in a network topology using a discovery node in a mesh network; transmitting an explore frame, based at least in part on the sensed change, from the discovery node to a destination node using an intermediate node; receiving a response to the explore frame from the destination node; determining at least one functional network route from the discovery node to the destination node based at least…

System For Coupling A Power Line Communication Device To A Power Line Network

Granted: December 5, 2013
Application Number: 20130320775
Coupling circuit for coupling a power line communication device to a power line network, including a first network port coupled between a network phase line and a first network line, a second network port coupled between a network neutral line and a second network line, a third network port coupled between a network ground line and a third network line, a first differential modem port including a first terminal and a second terminal, a second differential modem port including a third…

METHOD FOR UNIQUELY ADDRESSING A GROUP OF NETWORK UNITS IN A SUB-NETWORK

Granted: August 22, 2013
Application Number: 20130219482
In embodiments of the present disclosure improved capabilities are described for delivering a command to a group of computing devices, comprising sending a message from a controller to a first of a plurality of computing devices, wherein the plurality of computing devices are on the same network, and where the message includes a plurality of bit-wise addresses and a command. The message is then broadcast from the first of the plurality of computing devices to the remaining of the…

MULTICAST TRANSMISSIONS

Granted: August 15, 2013
Application Number: 20130208719
A method for multicast transmissions between a source node and a client node includes the source node generating a multicast stream identifier to uniquely identify the multicast stream, and the source node establishing a path between the source node and the client node for a specified the multicast stream, each node in the path using unicast routing tables in order to identify a next node on the path during path establishment, and the source node transmitting messages of the specified…

SYSTEM FOR COUPLING A POWER LINE COMMUNICATION DEVICE TO A POWER LINE NETWORK

Granted: December 13, 2012
Application Number: 20120313764
Coupling circuit for coupling a power line communication device to a power line network, including a first network port, a second network port, a third network port, a first modem port, a second modem port, a third modem port, a fourth modem port, a first transformer, a second transformer, a third transformer and at least two capacitors, the first transformer including a first network side winding including two terminals, a first modem side transmitter winding including two terminals, a…

POWER LINE COMMUNICATIONS METHOD AND APPARATUS

Granted: July 12, 2012
Application Number: 20120177132
Method for communication channel coordination between nodes, each node including at least one of a transmitter and a receiver, for transmitting and receiving signals over residential electrical cables. The residential electrical cables include at least one active wire, one neutral wire and one ground wire, at least two of the wires forming wire pairs. The method includes the procedures of, for a given one of the receiver, examining the transmitter in each one of the nodes which…

POWER LINE COMMUNICATIONS METHOD AND APPARATUS

Granted: June 28, 2012
Application Number: 20120161543
System, for transmitting and receiving signals over residential electrical cables includes at least one active wire, one neutral wire and one ground wire. The system includes at least two power line modems, each one of the two power line modems including a processor, transmitters and at least one receiver, transmitters and the receiver being coupled with the processor, for respectively transmitting and receiving the signals. At least two of the wires form at least one receive wire pair…

POWER LINE COMMUNICATIONS METHOD AND APPARATUS

Granted: June 28, 2012
Application Number: 20120163435
Apparatus, for transmitting and receiving signals over residential electrical cables, includes a processor, at least one transmitter and at least one receiver. The transmitter and the receiver are coupled with the processor, for respectively transmitting and receiving the signals. The apparatus is coupled with an electrical cable including at least one active wire, one neutral wire and one ground wire. At least two of the wires form receive wire pairs wherein at least two of the wires…

METHODS AND SYSTEMS FOR MONITORING QUALITY OF A VIDEO/AUDIO PLAYBACK DEVICE

Granted: May 5, 2011
Application Number: 20110107152
A computer-implemented method, executable software product, and system for performing a test of an audio/video playback device are described. The audio/video playback device includes at least one main processor, interfaces, and additional processors. The main processor(s) communicate with the additional processors through the interfaces. The method, software product, and system include monitoring at least part of the interfaces for communications between the main processor(s) and the…

DIGITAL AUTOMATIC GAIN CONTROL WITH PARALLEL/SERIAL INTERFACE FOR MULTIPLE ANTENNA ULTRA WIDEBAND OFDM SYSTEM

Granted: March 8, 2007
Application Number: 20070053451
The invention enables automatic gain control in ultra wideband applications over multiple channels and frequency bands.