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公开(公告)号：GB2339653B
公开(公告)日：2003-06-04
申请号：GB9815136
申请日：1998-07-14
Applicant: IBM
Inventor： CRUMMEY THOMAS , FERGUSSON RICHARD JOHN , KERIGAN SHAUN , LANE PHILIP
Abstract: An isochronous output data stream format in which a single n bit word is transmitted as m multiple synchronous data streams where the length of the word transmitted in each data stream is n/m, the output data stream containing multiple isochronous different data rate data streams and one or more asynchronous data stream or streams. One bit from each of the m multiple synchronous data streams are combined and transmitted as a single signal at one of 2 analog levels. Data which is it desired to have a lower error rate than other data is transmitted in the synchronous data stream corresponding to the most significant bit associated with the 2 analog levels. Calibration data is transmitted in the synchronous data stream corresponding to the most significant bit associated with the 2 analog levels, the calibration data also being transmitted distributed over each of the m synchronous data streams.
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公开(公告)号：GB2339654A
公开(公告)日：2000-02-02
申请号：GB9815138
申请日：1998-07-14
Applicant: IBM
Inventor： CREANEY STEPHEN , FERGUSSON RICHARD JOHN , HEATH STUART , KERIGAN SHAUN , LANE PHILIP , STEVENS ANDREW , SELVIAH DAVID
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公开(公告)号：GB2366677A
公开(公告)日：2002-03-13
申请号：GB0022130
申请日：2000-09-09
Applicant: IBM
Inventor： FERGUSSON RICHARD JOHN
IPC: H04B10/54 , H04B10/155 , H04L27/20
Abstract: An optical amplitude modulator for modulating signals for transmission by a fibre optic link. The modulator comprises of a plurality of optical transmitters, whereby each transmitter is driven by an electronic circuit. Generally, each optical transmitter provides a light output, and the light outputs of the plurality of optical transmitters are combined optically for transmission as an optical output signal. Additionally, each of the plurality of optical transmitters has an associated optical filter, whereby each filter has a different level of opaqueness. Each filter, filters light output from the associated optical transmitter. In a way a multi-level optical output is achieved.
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公开(公告)号：GB2339655A
公开(公告)日：2000-02-02
申请号：GB9815132
申请日：1998-07-14
Applicant: IBM
Inventor： CRUMMEY THOMAS , FERGUSSON RICHARD JOHN , KERIGAN SHAUN , LANE PHILIP
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Patent Agency Ranking
公开(公告)号：GB2366677B
公开(公告)日：2004-05-19
申请号：GB0022130
申请日：2000-09-09
Applicant: IBM
Inventor： FERGUSSON RICHARD JOHN
IPC: H04B10/54 , H04B10/155 , H04L27/20
Abstract: An optical amplitude modulator for modulating signals for transmission by a fibre optic link. The modulator comprises of a plurality of optical transmitters, whereby each transmitter is driven by an electronic circuit. Generally, each optical transmitter provides a light output, and the light outputs of the plurality of optical transmitters are combined optically for transmission as an optical output signal. Additionally, each of the plurality of optical transmitters has an associated optical filter, whereby each filter has a different level of opaqueness. Each filter, filters light output from the associated optical transmitter.
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公开(公告)号：GB2366678B
公开(公告)日：2004-04-21
申请号：GB0022133
申请日：2000-09-09
Applicant: IBM
Inventor： FERGUSSON RICHARD JOHN , CRUMMEY TOM
IPC: H04B10/69 , H04L25/06 , H04L25/26 , H04B10/158 , H04L27/22
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公开(公告)号：GB2339655B
公开(公告)日：2003-09-10
申请号：GB9815132
申请日：1998-07-14
Applicant: IBM
Inventor： CRUMMEY THOMAS , FERGUSSON RICHARD JOHN , KERIGAN SHAUN , LANE PHILIP
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公开(公告)号：GB2366678A
公开(公告)日：2002-03-13
申请号：GB0022133
申请日：2000-09-09
Applicant: IBM
Inventor： FERGUSSON RICHARD JOHN , CRUMMEY TOM
IPC: H04B10/69 , H04L25/06 , H04L25/26 , H04B10/158 , H04L27/22
Abstract: An optical amplitude demodulator for demodulating signals received from a fibre optic link. The demodulator comprises a plurality of optical sensors for detecting optical output from the fibre optic link, whereby each of the optical sensors has a different detection threshold. Generally, the plurality of optical sensors produce a plurality of digital outputs corresponding to the optical output level detected. A priority encoder encodes the digital outputs into a multi-bit digital signal. Additionally, each of the plurality of optical sensors has an associated optical filter, whereby each of the filters has a different level of opaqueness. Each filter filters received optical output prior to detection by the associated optical sensor. For use with multi-level optical signals.
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公开(公告)号：GB2339653A
公开(公告)日：2000-02-02
申请号：GB9815136
申请日：1998-07-14
Applicant: IBM
Inventor： CRUMMEY THOMAS , FERGUSSON RICHARD JOHN , KERIGAN SHAUN , LANE PHILIP
Abstract: An isochronous output data stream format in which a single n bit word is transmitted as m multiple synchronous data streams where the length of the word transmitted in each data stream is n/m, the output data stream containing multiple isochronous different data rate data streams and one or more asynchronous data stream or streams. One bit from each of the m multiple synchronous data streams are combined and transmitted as a single signal at one of 2 analog levels. Data which is it desired to have a lower error rate than other data is transmitted in the synchronous data stream corresponding to the most significant bit associated with the 2 analog levels. Calibration data is transmitted in the synchronous data stream corresponding to the most significant bit associated with the 2 analog levels, the calibration data also being transmitted distributed over each of the m synchronous data streams.
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