Akros Silicon, Inc.

Ams Ag

Other

Agere Systems Inc.

Akras Silicon Inc.

Sajol Christopher Ghoshal

John R Camagna

Philip John Crawley

David Edward Bliss

Timothy Alan Dhuyvetter

Michael W Altmann

Gregory E Beers

Randall Findley

Sina Afshari

Francois Crepin

J Francois Crepin

A method for calibrating a color space transformation according comprises driving of a light source at a first ambient temperature T. The light source it is tuned to emit light with a number N of combinations of at least two correlated color temperatures and at least two intensities. Furthermore, the method includes receiving first red coordinates, first green coordinates and first blue coordinates measurements in the RGB color space. First x-coordinates, first y-coordinates and first z-coordinates are received from measurements in the XYZ color space. 3&#xd7;N matrices RGB_and XYZ_are constructed based on the received coordinates. A 3&#xd7;3 conversion matrix C is generated to fulfil the relation XYZ_=C*RGB_

Method for calibrating a color space transformation, method for color space transformation and color control system

A sensor arrangement for controlling room lighting comprises a light sensor and a controller. The light sensor is arranged for both detecting an ambient light level and for detecting a remote signal to be emitted by a remote control unit. A detection signal is providing at a sensor terminal and is indicative of the ambient light level and indicative of the remote signal. The controller comprises an input terminal connected to the sensor terminal and comprises a controller means to generate a control signal depending on the detection signal to control a light source to be connected at an output terminal.

Sensor arrangement for controlling room lighting, sensor network for controlling room lighting and method for controlling room lighting

In a network device, a connector module comprises a network connector coupled to the connector module in a configuration that transfers power and communication signals and an application connector that comprises serial media independent interface (SMII) pins and power pins. A Power-over-Ethernet (PoE) circuit is coupled between the network connector and the application connector.

Ethernet module

Embodiments of the present invention provide a power source equipment (PSE) network device operable to provide a network signal that may include both power and data. This PSE network device includes a network connector and an integrated circuit. The network connector physically couples the PSE network device to the network. The integrated circuit further includes a power feed circuit. This power feed circuit is operable to combine and pass the received data signals and power signal as a single network signal. A PSE controller electrically couples to the integrated circuit but is not necessarily part of the integrated circuit. The PSE controller is operable to govern the production and distribution of the power portion of the network signal.

Solid state transformer-less method to feed high bandwidth data and power signals from a network attached power sourcing device

A network device comprises an Ethernet physical layer (PHY) comprising an isolation, protection, and electromagnetic interference suppression barrier operative for isolated power and data transfer.

Isolated ethernet physical layer (PHY)

An open collector/open drain interface, such as IC interface between two or more integrated circuit devices, employs isolation techniques to provide electrical isolation of a digital signal for transmission of the signal between the devices. Uni-directional isolator channels are utilized to transmit bidirectional digital signals, and a selection of an isolator channel operating in an intended transmission direction is performed by direction control logic. Edge detection logic is utilized to determine changes in edges of a digital signal, thus determining a transmitting device and a transmission direction. The direction state is held in a direction state register. This state is held until the appropriate edge is detected on the transmit side, returning the isolator to the idle state. In the idle state neither side of the isolator is in a driven state. During transmission, the digital signal is transmitted through an isolator channel and sent to a receiving device.

Open collector / open drain integrated bidirectional digital isolator

A signal isolator comprises an isolation barrier, a transmitter, a differentiator, and a recovery circuit. The transmitter is coupled to a first side of the isolation barrier and is configured to receive and convert an information signal to a differential signal that encodes information in the information signal in a single transition edge. The differentiator is coupled to a second side that is isolated from the first side of the isolation harrier and differentiates the differential signal. The recovery circuit is coupled to the differentiator and operates to recover an output information signal based on the information in the single transition edge.

Digital isolator with communication across an isolation barrier

Embodiments disclosed herein describe a network interface device including a first powered device controller coupled to first and second power supply lines. A second powered device controller coupled to third and fourth input power supply lines. A dc-dc converter coupled to receive a single signal representing a sum of power signals output by the first and second powered device controllers.

Power signal merging for network interface devices

An interface between USB devices employs isolation techniques to provide electrical isolation of a USB signal for transmission of the USB signal between the devices. Unidirectional isolator channels are utilized to transmit the USB signals, and a selection of an isolator channel operating in an intended direction is performed by either direction control logic or a USB hub function. Logic may be employed to detect a device attempting to initiate a USB signal. The logic operates to enable a transmitter on a receiving side and isolate the USB signal through an isolator channel operating in a transmission direction.

USB integrated bidirectional digital isolator channel across an interface between two USB devices

A power converter comprises a direct current (DC)-DC converter configured to receive an input voltage in a primary domain, a transformer coupled to and driven by the DC-DC converter and supplying an output voltage in a secondary domain, and a transmission path configured to pass a digital feedback signal through an isolation barrier from the secondary domain to the primary domain.

DC-DC converter with communication across an isolation pathway

A powered device on a network is isolated by communicating operating power and data to a powered device from a network line, referencing the network line to a line reference, and referencing the powered device to a device reference that can be different from the line reference. The powered device is isolated from the network line with an isolation boundary positioned between distributed power and the powered device at a digital port coupled to the powered device.

Power over Ethernet with isolation

A semiconductor device comprises an integrated circuit formed on a substrate with a signal interface and at least one isolator capacitor. The integrated circuit comprises a plurality of interleaved inter-metal dielectric layers and interlayer dielectrics formed on the substrate, a thick passivation layer formed on the plurality of the interleaved inter-metal dielectric layers and interlayer dielectrics, and a thick metal layer formed on the thick passivation layer. The thick passivation layer has a thickness selected to be greater than the isolation thickness whereby testing for defects is eliminated. The one or more isolator capacitors comprise the thick metal layer and a metal layer in the plurality of interleaved inter-metal dielectric layers and interlayer dielectrics separated by the thick passivation layer as an insulator.

Capacitor structure in a semiconductor device

An active clamp device electrically couples first and second nodes in respective first and second supply domains referenced to ground potentials that can be different. The active clamp device comprises first and second active devices controlled by signals respectively referenced to the first and second supply domains that create a short-circuit or low impedance connection between the first and second nodes in normal operation and drive impedance between the first and second nodes high in response to a transient event.

Growing community of inventors

Austin, TX, United States of America

Sajol Christopher Ghoshal