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Passive multi-input comparator for orthogonal codes on a multi-wire bus

專利號(hào)
US11159350B2
公開日期
2021-10-26
申請人
Kandou Labs, S.A.(CH Lausanne)
發(fā)明人
Armin Tajalli; Chen Cao; Kiarash Gharibdoust
IPC分類
H04L25/02
技術(shù)領(lǐng)域
sub0,sub,resistor,channel,odvs,wire,in,codeword,w0,enrz
地域: Lausanne

摘要

Methods and systems are described for receiving a plurality of signals via a plurality of wires of a multi-wire bus, the plurality of signals corresponding to symbols of a codeword of a vector signaling code, generating, using an interconnected resistor network connected to the plurality of wires of the multi-wire bus, a plurality of combinations of the symbols of the codeword of the vector signaling code on a plurality of output nodes, the plurality of output nodes including a plurality of pairs of sub-channel output nodes associated with respective sub-channels of a plurality of sub-channels, and generating a plurality of sub-channel outputs using a plurality of differential transistor pairs, each differential transistor pair of the plurality of differential transistor pairs connected to a respective pair of sub-channel output nodes of the plurality of pairs of sub-channel output nodes.

說明書

In embodiments where the circuit of FIG. 3 is incorporated to change the effective input series impedance, the number of switches closed in each instance of FIG. 3 may be the same across all instances and all subchannel receivers, except for instances where all switches are open, as in the case of fully disconnecting the pair of sub-channel output nodes associated with sub-channel Sub2 in the “l(fā)egacy” mode of operation as previously described.

Detection of other ODVS codes may be accomplished by adjustment of input resistor values to produce other input weighting ratios as described in [Holden]. In system environments where both true and compliment versions of input signals are available (as one example, from active CTLE stages having differential outputs) both non-inverted and inverted signal values may be resistively summed prior to active detection.

權(quán)利要求

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