# US 12,771,399 B2 · Transceiver including bidirectional switching network circuit > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,771,399 B2 - Document ID: US12771399B2 - Status: Granted - Kind: B2 - Application number: 18/653,774 - Filed: 2024-05-02 - Published: 2025-07-03 - Granted: 2026-10-20 - Earliest claimed: 2023-12-27 - Assignees: SK hynix Inc.; Seoul National University R&Db Foundation - Applicants: SK hynix Inc.; Seoul National University R&DB Foundation - Inventors: Sanghyuk Seo; Suhwan Kim - Web page: https://patentgrep.com/patent/US12771399B2 ## CPC - H04B 1/44: Transmit/receive switching - H04B 1/405: with multiple discrete channels - H04B: TRANSMISSION ## Abstract A transceiver connected to a specific channel via a channel connection node, the transceiver includes a transmitter driving a first node and a second node based on an input data signal in a transmission mode, the first node connected to the channel connection node; a receiver receiving a specific channel signal from the channel connection node and providing an output data signal based on the channel signal and an input differentiation signal in a reception mode, the input differentiation signal being generated based on at least one first output differentiation signal; and a switch network circuit connected between the second node and the channel connection node. The switching network circuit has a first circuit in the transmission mode and a second circuit in the reception mode, and provides at least one second output differentiation signal by differentiating the channel. ## Claims ### Claim 1 A transceiver connected to a specific channel via a channel connection node, the transceiver comprising: a transmitter configured to drive a first node and a second node based on an input data signal in a transmission mode, the first node connected to the channel connection node; a receiver configured to receive a specific channel signal from the channel connection node and provide an output data signal based on the specific channel signal and an input differentiation signal in a reception mode, the input differentiation signal being generated based on at least one first output differentiation signal, the at least one first output differentiation signal being obtained by differentiating at least one other channel signal received from at least one other channel, the at least one other channel being connected to at least one other transceiver and different from the specific channel that conveys the specific channel signal; and a switching network circuit connected between the second node and the channel connection node, wherein the switching network circuit has a first circuit in the transmission mode, wherein, in the reception mode, the switching network circuit has a second circuit and provides at least one second output differentiation signal by differentiating the channel signal, and wherein each of the at least one first output differentiation signal indicates a time-derivative of a corresponding one of the at least one other channel signal, and each of the at least one second output differentiation signal indicates a time-derivative of the specific channel signal. ### Claim 2 (depends on 1) The transceiver of claim 1, wherein the transmitter includes: a driving circuit configured to drive the first node based on the input data signal; and an inverter circuit configured to drive the second node by inverting an inverted version of the input data signal. ### Claim 3 (depends on 1) The transceiver of claim 1, wherein the receiver includes: a signal receiving circuit configured to receive the channel signal; and a differentiation signal receiving circuit connected to an output node of the signal receiving circuit and configured to receive the input differentiation signal. ### Claim 4 (depends on 3) The transceiver of claim 3, wherein the channel signal and the input differentiation signal affect voltage of a signal at the output node of the signal receiving circuit in opposite directions when the receiver generates the output data signal. ### Claim 5 (depends on 3) The transceiver of claim 3, wherein the receiver further comprises a data output circuit which is connected to the output node of the signal receiving circuit and generates the output data signal. ### Claim 6 (depends on 3) The transceiver of claim 3, wherein the receiver further includes an equalization circuit connected to the output node of the signal receiving circuit. ### Claim 7 (depends on 6) The transceiver of claim 6, wherein the equalization circuit is a decision feedback equalization (DFE) circuit. ### Claim 8 (depends on 1) The transceiver of claim 1, wherein the first circuit of the switching network circuit has to an equivalent capacitor connected between the second node and the channel connection node in the transmission mode. ### Claim 9 (depends on 8) The transceiver of claim 8, wherein the first circuit includes a plurality of capacitors connected in parallel to each other between the second node and the channel connection node. ### Claim 10 (depends on 1) The transceiver of claim 1, wherein the at least one second output differentiation signal is a plurality of second output differentiation signals, and the second circuit of the switching network circuit includes a plurality of differentiator circuits commonly connected to the channel connection node and providing the plurality of second output differentiation signals, respectively. ### Claim 11 (depends on 1) The transceiver of claim 1, wherein the at least one other channel is a plurality of other channels, and the switching network circuit includes a plurality of sub-switching network circuits corresponding to the plurality of other channels, respectively. ### Claim 12 (depends on 11) The transceiver of claim 11, wherein the at least one second output differentiation signal is a plurality of second output differentiation signals, and the plurality of sub-switching network circuits generate the plurality of second output differentiation signals that indicate crosstalk noise components affecting the plurality of other channels, respectively. ### Claim 13 (depends on 11) The transceiver of claim 11, wherein the at least one second output differentiation signal is a plurality of second output differentiation signals, and a sub-switching network circuit among the plurality of sub-switching network circuit includes: a differentiator circuit to provide a corresponding one of the second output differentiation signals to a third node; a first switch connected between the second node and the third node; a second switch having one terminal connected to the third node; and a third switch providing a reference voltage to the differentiator circuit, wherein the first switch is turned on in the transmission mode, and the second switch and the third switch are turned on in the reception mode, and wherein the other terminal of the second switch provides the corresponding one of the second output differentiation signal output from the differentiation circuit in the reception mode. ### Claim 14 (depends on 1) The transceiver of claim 1, wherein the at least one first output differentiation signal is a plurality of first output differentiation signals, and the at least one other channel is a plurality of other channels, and wherein the plurality of first output differentiation signals indicate crosstalk noise components in the specific channel affected by the plurality of other channels, respectively. ### Claim 15 (depends on 14) The transceiver of claim 14, wherein the input differentiation signal is generated by summing the plurality of first output differentiation signals. ### Claim 16 (depends on 15) The transceiver of claim 15, wherein the at least one other channel signal is a plurality of other channel signals, and a plurality of other transceivers than the transceiver include a plurality of sub-switching network circuits, respectively, each of the sub-switching network circuits receiving a corresponding one of the other channel signals and differentiating the received channel signal to output a corresponding one of the first output differentiation signals. ### Claim 17 (depends on 1) The transceiver of claim 1, wherein the specific channel and the at least one other channel are System-in-Package (SiP) channels in High Bandwidth Memory (HBM). ### Claim 18 (depends on 1) The transceiver of claim 1, wherein each of the at least one first output differentiation signal is obtained using a differentiation circuit differentiating a corresponding one of the at least one other channel signal. ### Claim 19 (depends on 1) The transceiver of claim 1, wherein the first circuit of the switching network circuit in the transmission mode includes a plurality of capacitors connected in parallel to each other, and wherein the second circuit of the switching network circuit in the reception mode includes a plurality of differentiator circuits, each of the differentiator circuits is an RC differentiator.