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公开(公告)号：US10243614B1
公开(公告)日：2019-03-26
申请号：US15881512
申请日：2018-01-26
申请人： Kandou Labs, S.A.
发明人： Roger Ulrich , Armin Tajalli , Ali Hormati , Richard Simpson
摘要： Methods and systems are described for receiving, over a plurality of consecutive signaling intervals, a plurality of codewords, each codeword received as a plurality of symbols via wires of a multi-wire bus, the plurality of symbols received at a plurality of multi-input comparators (MICs), wherein each symbol is received by at least two MICs, generating, for each codeword, a corresponding linear combination of the received symbols, generating a plurality of composite skew measurement signals over the plurality of consecutive signaling intervals, each composite skew measurement signal based on samples of one or more linear combinations, and updating wire-specific skew values of the wires of the multi-wire bus, wherein one or more wire-specific skew values are updated according to composite skew measurement signals associated with linear combinations formed by at least two different MICs.
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公开(公告)号：US10193716B2
公开(公告)日：2019-01-29
申请号：US15582545
申请日：2017-04-28
申请人： Kandou Labs, S.A.
发明人： Ali Hormati , Richard Simpson
摘要： Methods and systems are described for generating two comparator outputs by comparing a received signal to a first threshold and a second threshold according to a sampling clock, the first and second thresholds determined by an estimated amount of inter-symbol interference on a multi-wire bus, selecting one of the two comparator outputs as a data decision, the selection based on at least one prior data decision, and selecting one of the two comparator outputs as a phase-error indication, the phase error indication selected in response to identification of a predetermined data decision pattern.
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公开(公告)号：US20170317675A1
公开(公告)日：2017-11-02
申请号：US15582550
申请日：2017-04-28
申请人： Kandou Labs, S.A.
发明人： Omid Talebi Amiri , Richard Simpson
CPC分类号： H03K19/0005 , H04B3/04
摘要： A driver for transmitting multi-level signals on a multi-wire bus is described that includes at least one current source connected to a transmission line, each current source selectively enabled to source current to the transmission line to drive a line voltage above a termination voltage of a termination voltage source connected to the transmission line via a termination impedance element, wherein each of the at least one current sources has an output impedance different than a characteristic impedance of the transmission line, and at least one current sink connected to the transmission line, each current sink selectively enabled to sink current from the transmission line to drive a line voltage below the termination voltage, each of the at least one current sinks having an output impedance different than the characteristic impedance of the transmission line.
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公开(公告)号：US09362962B2
公开(公告)日：2016-06-07
申请号：US14014082
申请日：2013-08-29
申请人： Kandou Labs, S.A.
CPC分类号： H04B1/06 , G06F13/385 , Y02D10/14 , Y02D10/151
摘要： In a high-impedance communications interface, driver energy consumption is proportional to the number of signal transitions. For signals having three or more distinct levels, it is possible for a signal driver to salvage energy from some downward signal transitions and reuse it on some subsequent upward signal transitions. To facilitate this energy-conserving behavior, communication is performed using group signaling over sets of wires using a vector signaling code, with the design and use of the vector signaling code insuring that energy availability is balanced with energy demand.
摘要翻译： 在高阻抗通信接口中，驱动器的能量消耗与信号转换的数量成正比。 对于具有三个或更多个不同等级的信号，信号驱动器可以从一些向下的信号转换中挽救能量并且在一些后续的向上信号转换上重用它。 为了促进这种节能行为，使用矢量信令代码，使用组合信令对集合信号进行通信，同时设计和使用矢量信令码，确保能量可用性与能量需求平衡。
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公开(公告)号：US20150063494A1
公开(公告)日：2015-03-05
申请号：US14014082
申请日：2013-08-29
申请人： Kandou Labs, S.A.
IPC分类号： H04B1/06
CPC分类号： H04B1/06 , G06F13/385 , Y02D10/14 , Y02D10/151
摘要： In a high-impedance communications interface, driver energy consumption is proportional to the number of signal transitions. For signals having three or more distinct levels, it is possible for a signal driver to salvage energy from some downward signal transitions and reuse it on some subsequent upward signal transitions. To facilitate this energy-conserving behavior, communication is performed using group signaling over sets of wires using a vector signaling code, with the design and use of the vector signaling code insuring that energy availability is balanced with energy demand.
摘要翻译： 在高阻抗通信接口中，驱动器的能量消耗与信号转换的数量成正比。 对于具有三个或更多个不同等级的信号，信号驱动器可以从一些向下的信号转换中挽救能量并且在一些后续的向上信号转换上重用它。 为了促进这种节能行为，使用矢量信令代码，使用组合信令对集合信号进行通信，同时设计和使用矢量信令码，确保能量可用性与能量需求平衡。
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公开(公告)号：US20140226734A1
公开(公告)日：2014-08-14
申请号：US14178051
申请日：2014-02-11
申请人： Kandou Labs, S.A.
发明人： John Fox , Brian Holden , Peter Hunt , John D. Keay , Amin Shokrollahi , Andrew Kevin John Stewart , Giuseppe Surace , Roger Ulrich , Richard Simpson
IPC分类号： H04B3/04
CPC分类号： H03K19/018521 , G06F13/4282 , H01L23/147 , H01L23/5384 , H01L2224/16 , H01L2924/15174 , H01L2924/15192 , H03K3/037 , H03K19/017509 , H04B1/40 , H04L67/12 , Y02D10/14 , Y02D10/151
摘要： Systems and methods are described for transmitting data over physical channels to provide a high bandwidth, low latency interface between integrated circuit chips with low power utilization. Communication is performed using group signaling over multiple wires using a vector signaling code, where each wire carries a low-swing signal that may take on more than two signal values.
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公开(公告)号：US11563554B2
公开(公告)日：2023-01-24
申请号：US17672410
申请日：2022-02-15
申请人： Kandou Labs, S.A.
发明人： Roger Ulrich , Armin Tajalli , Ali Hormati , Richard Simpson
摘要： Generating, during a first and second signaling interval, an aggregated data signal by forming a linear combination of wire signals received in parallel from wires of a multi-wire bus, wherein at least some of the wire signals undergo a signal level transition during the first and second signaling interval; measuring a signal skew characteristic of the aggregated data signal; and, generating wire-specific skew offset metrics, each wire-specific skew offset metric based on the signal skew characteristic.
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公开(公告)号：US20220173943A1
公开(公告)日：2022-06-02
申请号：US17517042
申请日：2021-11-02
申请人： Kandou Labs, S.A.
发明人： Ali Hormati , Richard Simpson
摘要： Methods and systems are described for generating two comparator outputs by comparing a received signal to a first threshold and a second threshold according to a sampling clock, the first and second thresholds determined by an estimated amount of inter-symbol interference on a multi-wire bus, selecting one of the two comparator outputs as a data decision, the selection based on at least one prior data decision, and selecting one of the two comparator outputs as a phase-error decision, the phase error decision selected in response to identification of a predetermined data decision pattern.
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公开(公告)号：US10785072B2
公开(公告)日：2020-09-22
申请号：US16261502
申请日：2019-01-29
申请人： Kandou Labs, S.A.
发明人： Ali Hormati , Richard Simpson
摘要： Methods and systems are described for generating two comparator outputs by comparing a received signal to a first threshold and a second threshold according to a sampling clock, the first and second thresholds determined by an estimated amount of inter-symbol interference on a multi-wire bus, selecting one of the two comparator outputs as a data decision, the selection based on at least one prior data decision, and selecting one of the two comparator outputs as a phase-error decision, the phase error decision selected in response to identification of a predetermined data decision pattern.
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公开(公告)号：US10560146B2
公开(公告)日：2020-02-11
申请号：US16363788
申请日：2019-03-25
申请人： Kandou Labs, S.A.
发明人： Roger Ulrich , Armin Tajalli , Ali Hormati , Richard Simpson
摘要： Methods and systems are described for receiving, over a plurality of consecutive signaling intervals, a plurality of codewords, each codeword received as a plurality of symbols via wires of a multi-wire bus, the plurality of symbols received at a plurality of multi-input comparators (MICs), wherein each symbol is received by at least two MICs, generating, for each codeword, a corresponding linear combination of the received symbols, generating a plurality of composite skew measurement signals over the plurality of consecutive signaling intervals, each composite skew measurement signal based on samples of one or more linear combinations, and updating wire-specific skew values of the wires of the multi-wire bus, wherein one or more wire-specific skew values are updated according to composite skew measurement signals associated with linear combinations formed by at least two different MICs.
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