Omron Management Center of America, Inc.

Blaze Network Products, Inc.

Kenneth Herrity

Eric B Grann

As taught herein, a floating current source outputs a load biasing current from a source terminal into an external load which may have a variable resistance, and sinks the load biasing current from the load into a sink terminal. Advantageously, the floating current source includes a single-transistor current sink having a bias control that sets the magnitude of the load biasing current desired, and further includes a single-transistor current source that self-biases from the float voltage developed on the external load to an operating point at which the single-transistor current source sources the desired magnitude of load biasing current. One or more AC shunts within the self-biasing network prevent any AC fluctuations present or impressed on the source terminal of the floating current source from changing the operating point of the single-transistor current source, thereby imparting a high effective impedance to the single-transistor current source.

Method and apparatus for a floating current source

A video transport system is provided for transporting as 8B/10B coded video stream across a 64B/66B coded link, wherein forward error correction is provided without the overhead of the prior art. The system also provides a system with the ability to recover 64B/66B Encoded blocks that have corrupt Sync bits.

Method and apparatus for transporting an 8B/10B coded video stream across a 64B/66B coded link

According to one aspect of the teachings herein, a system includes first and second modules that respectively anchor host-side and device-side ends of an intermediate transport link that interconnects a USB host to a USB device. The system detects when the host activates an isochronous endpoint in the device for an isochronous IN data transaction, and the second module autonomously generates data requests for the device and forwards the isochronous data output from the device towards the first module. In turn, the first module buffers the data and provides it to the host in response to host's data requests. However, the first module blocks host requests from propagating to the device and it NACKs host requests until forwarded data is available from the second module. Such operation remains transparent to the host and device, while avoiding USB timing violations, even for extended intermediate transport links.

Method and apparatus for USB signaling via intermediate transports

This invention uses fiber characteristics combined with knowledge of the 8b10b code to discover and compensate for skew between parallel data streams, caused by chromatic dispersion, in a WDM system allowing the receiver to recover both the data and timing of the data streams as they were originally launched. This skew discovery and compensation does not require the insertion or deletion of any control symbols to/from the original 8b10b streams, and does not require the use of a training or sample sequence.

Skew discovery and compensation for WDM fiber communications systems using 8b10b encoding

A low profile optical wavelength division multiplexer and/or demultiplexer is provided which is carried in a pluggable module and adapted for detachable connection to a host device. The device includes a three strata optical subassembly including a substrate, a molded plastic coupling module and an optical block either connected to or integrally formed with the molded coupling module. The device can be used with either horizontally or vertically pluggable modules. The device has one embodiment capable of mounting in a GBIC compliant module.

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Milpitas, CA, United States of America

Kenneth Herrity