# US 11,095,333 B2 · Systems and methods for die-to-die communication > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,095,333 B2 - Document ID: US11095333B2 - Status: Granted - Kind: B2 - Application number: 16/600,639 - Filed: 2019-10-14 - Published: 2020-02-06 - Granted: 2021-08-17 - Earliest claimed: 2016-06-28 - Assignees: Taiwan Semiconductor Manufacturing Company, Ltd. - Applicants: Taiwan Semiconductor Manufacturing Company Limited - Inventors: Huan-Neng Chen; Chewn-Pu Jou; Feng-Wei Kuo; Lan-Chou Cho; William Wu Shen - Web page: https://patentgrep.com/patent/US11095333B2 ## CPC - H04B 1/40: Circuits - H04B 1/0078: {with a common intermediate frequency amplifier for the different intermediate frequencies, e.g. when using switched intermediate frequency filters} - H04L 1/0061: {Error detection codes} - H04L 1/1854: {Scheduling and prioritising arrangements} - H04L 2027/0022: {using the carrier of the associated receiver of a transceiver} - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A transceiver disposed on a first die in a bidirectional differential die-to-die communication system is disclosed. The transceiver includes a transmission section configured to modulate a first data onto a carrier signal having a first frequency for transmission via a bidirectional differential transmission line; and a reception section configured to receive signals from the bidirectional differential transmission line, the reception section including a filter configured to pass frequencies within a first passband that includes a second frequency, the first frequency being outside of the first passband. According to some embodiments, the reception section is configured to receive, via the bidirectional differential transmission line, modulated data at the second frequency at a same time that the transmission section transmits the modulated data at the first frequency. ## Claims ### Claim 1 A transceiver disposed on a first die in a bidirectional differential die-to-die communication system, the transceiver comprising: a transmission section configured to modulate a first data onto a carrier signal having a first frequency for transmission via a bidirectional differential transmission line; and a reception section configured to receive signals from the bidirectional differential transmission line, the reception section including: a first filter configured to pass frequencies within a first passband that includes a second frequency, the first frequency being outside of the first passband; and a second filter configured to pass frequencies within a second passband that includes a third frequency, the first frequency and the second frequency both being outside of the second passband. ### Claim 2 (depends on 1) The transceiver of claim 1, wherein the reception section is configured to receive, via the bidirectional differential transmission line, modulated data at the second frequency at a same time that the transmission section transmits the modulated data at the first frequency. ### Claim 3 (depends on 2) The transceiver of claim 2, wherein the bidirectional differential transmission line is configured to carry the modulated data at the first and second frequencies simultaneously. ### Claim 4 (depends on 1) The transceiver of claim 1, wherein the first and second frequencies are radio frequencies, and the transceiver comprises a radio-frequency (RF) transceiver. ### Claim 5 (depends on 1) The transceiver of claim 1, wherein the bidirectional differential transmission line is configured to carry the modulated first data and a modulated second data simultaneously. ### Claim 6 (depends on 1) The transceiver of claim 1, wherein the modulated first data includes an error detection code or error correction code and payload data. ### Claim 7 (depends on 6) The transceiver of claim 6, wherein the modulated second data includes a resend request, a second transceiver being configured to (i) detect an error in received data based on the error detection code or error correction code, and (ii) transmit the resend request at a same time that the first transceiver transmits the payload data, the resend request being transmitted based on the second transceiver's detection of the error. ### Claim 8 (depends on 7) The transceiver of claim 7, wherein the transmission section of the first transceiver is configured to transmit, via the bidirectional differential transmission line, a timing signal modulated at a fourth frequency, and wherein a reception section of the second transceiver comprises: a third filter configured to pass frequencies within a fourth passband that includes the fourth frequency, the second transceiver being configured to receive and process the timing signal to determine a timing of the modulated first data. ### Claim 9 (depends on 8) The transceiver of claim 8, wherein the timing signal is a DQS data strobe signal, and the fourth frequency is a baseband frequency. ### Claim 10 A transceiver disposed on a first die in a bidirectional communication system, the transceiver comprising: a transmission section configured to modulate a first data onto a carrier signal having a first frequency for transmission via a bidirectional differential transmission line; and a reception section configured to receive signals from the bidirectional differential transmission line, the reception section including: a first filter configured to pass frequencies within a first passband that includes a second frequency, the first frequency being outside of the first passband; and a second filter configured to pass frequencies within a second passband that includes a third frequency, the first frequency and the second frequency both being outside of the second passband. ### Claim 11 (depends on 10) The transceiver of claim 10, wherein the reception section is configured to receive, via the bidirectional differential transmission line, modulated data at the second frequency at a same time that the transmission section transmits the modulated data at the first frequency. ### Claim 12 (depends on 11) The transceiver of claim 11, wherein the bidirectional differential transmission line is configured to carry the modulated data at the first and second frequencies simultaneously. ### Claim 13 (depends on 10) The transceiver of claim 10, wherein the first and second frequencies are radio frequencies, and the transceiver comprises a radio-frequency (RF) transceiver. ### Claim 14 (depends on 10) The transceiver of claim 10, wherein the bidirectional differential transmission line is configured to carry the modulated first data and a modulated second data simultaneously. ### Claim 15 (depends on 10) The transceiver of claim 10, wherein the modulated first data includes an error detection code or error correction code and payload data. ### Claim 16 (depends on 15) The transceiver of claim 15, wherein the modulated second data includes a resend request, a second transceiver being configured to (i) detect an error in received data based on the error detection code or error correction code, and (ii) transmit the resend request at a same time that the first transceiver transmits the payload data, the resend request being transmitted based on the second transceiver's detection of the error. ### Claim 17 (depends on 10) The transceiver of claim 10, wherein the transmission section of the first transceiver is configured to transmit, via the bidirectional differential transmission line, a timing signal modulated at a fourth frequency, and wherein a reception section of the second transceiver comprises: a third filter configured to pass frequencies within a fourth passband that includes the fourth frequency, the second transceiver being configured to receive and process the timing signal to determine a timing of the modulated first data. ### Claim 18 (depends on 17) The transceiver of claim 17, wherein the timing signal is a DQS data strobe signal, and the fourth frequency is a baseband frequency. ### Claim 19 A method for simultaneously and bidirectionally communicating data between a first transceiver and a second transceiver, the method comprising: modulating, using the first transceiver disposed on a first die, first data onto a carrier signal having a first frequency; transmitting, using the first transceiver, the modulated first data via a bidirectional differential transmission line; filtering signals received at the first transceiver via the bidirectional differential transmission line using a first filter, wherein the first filter is configured to pass frequencies within a first passband that includes a second frequency, the first frequency being outside of the first passband; modulating, using the second transceiver disposed on a second die, second data onto a carrier signal having the second frequency; transmitting, using the second transceiver, the modulated second data via the bidirectional differential transmission line; filtering signals received at the second transceiver via the bidirectional differential transmission line using a second filter, wherein the second filter is configured to pass frequencies within a second passband that includes the first frequency, the second frequency being outside of the second passband; and filtering signals received at the first transceiver via the bidirectional differential transmission line using a third filter, wherein the third filter is configured to pass frequencies within a third passband that includes a third frequency, the first frequency and the second frequency both being outside of the third passband. ### Claim 20 (depends on 19) The method of claim 19, further comprises: receiving the modulated first data at the second transceiver, the modulated first data passing through the second filter; and receiving the modulated second data at the first transceiver, the modulated second data passing through the first filter.