Intel Corporation

Chien-Chang Liu

Miaobin Gao

Yu-Li Hsueh

William H Wang

Hengju Cheng

Brian H Kim

Darren S Crews

Lee Xu

Graham Flower

Jesse Chin

Yousheng Wu

Guobin Liu

Xiaojie J Xu

Frank Wang

Simon Lee, Ii

Thiri Lwin

Heng-ju Cheng

Embodiments introduce redundant optical channels to significantly extend the lifetime of parallel optical transceivers. A plurality of transmitters, N, transmit on a plurality of optical channels, where N is an integer number of optical channels greater than 1. One or more redundant channels, M, are also provided. N+M multiple input shift registers provide multiple paths for signals from each of the transmitters to connect to N+M laser diodes. In the event up to M of the N+M laser diodes fail, the multiple input shift registers connect the N transmitters to functioning ones of the N+M laser diodes thus extending the life of the device. A corresponding scheme is also described for the receiver side.

Redundant channel implementation to extend optical transceiver lifetime and reliability

A stream of data may flow over a fiber or other medium without any accompanying clock signal. The receiving device may then be required to process this data synchronously. Embodiments describe clock and data recovery (CDR) circuits which may sample a data signal at a plurality of sampling points to partition a clock cycle into four phase regions P, P, P, and Pwhich may be represented on a phase plane being divided into four quadrants. A relative phase between a data signal transition edge and a clock phase may be represented by a phasor on the phase plane. The clock phase and frequency may be adjusted by determining the instantaneous location of the phasor and the direction of phasor rotation in the phase plane.

Phase/frequency detector and charge pump architecture for referenceless clock and data recovery (CDR) applications

In one embodiment, the present invention includes an apparatus having a voltage controlled oscillator (VCO) to generate a first clock signal having a frequency controlled by a bias current coupling ratio of first and second bias currents, and a control circuit coupled to the VCO to generate a first pair of control signals to adjust the bias current coupling ratio. Other embodiments are described and claimed.

Bang-bang architecture

An optical receiver circuit is disclosed. This receiver included in receiver optical sub-assembly (ROSA) adjusts bandwidth based on a voltage level detection at a receiver signal strength indication (RSSI) pin, or rate-adaptively adjusts the bandwidth of optical receiver circuit based on operation data rate.

Mechanism to select bandwidth in an optical receiver circuit

Growing community of inventors

Sunnyvale, CA, United States of America

Chien-Chang Liu