# US 9,882,702 B2 · Asymmetric full duplex communication including device power communication > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,882,702 B2 - Document ID: US9882702B2 - Status: Granted - Kind: B2 - Application number: 13/946,505 - Filed: 2013-07-19 - Published: 2013-11-14 - Granted: 2018-01-30 - Earliest claimed: 2009-04-30 - Assignees: Eqcologic NV - Applicants: Eqcologic N.V. - Inventors: Bram Devuyst; Maarten Kuijk - Web page: https://patentgrep.com/patent/US9882702B2 ## CPC - H04B 3/548: {the power on the line being DC (arrangements for feeding power H04L12/10; extracting feeding power from signals H04L25/02)} - H04L 5/1407: {Artificial lines or their setting} - H04L 5/1461: {Suppression of signals in the return path, i.e. bidirectional control circuits} - H04L 25/028: {Arrangements specific to the transmitter end} - H04L 25/0292: {Arrangements specific to the receiver end} - H04L 25/0298: {Arrangement for terminating transmission lines} - H04L 47/10: Flow control; Congestion control - H04L 5/14: Two-way operation using the same type of signal, i.e. duplex - H04L 5/1423: {for simultaneous baseband signals} - H04L 12/5602: {Bandwidth control in ATM Networks, e.g. leaky bucket} - H04L 25/0272: {Arrangements for coupling to multiple lines, e.g. for differential transmission} - H04L 25/03878: {Line equalisers; line build-out devices} - H04L 47/22: Traffic shaping - H04L 47/30: in combination with information about buffer occupancy at either end or at transit nodes - H04L 47/35: by embedding flow control information in regular packets, e.g. piggybacking - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract An active transceiver circuit for transmission of a low bitrate data signal over and reception of a high bitrate data signal from a single ended transmission medium is provided. The active transceiver circuit includes an input port for receiving a low bitrate input data signal, an output port for delivering a high bitrate output data signal, a differential input/output port for launching a low bitrate data signal into the single ended transmission medium and for receiving a high bitrate data signal from the single ended transmission medium, a first and second single ended output driver adapted for each delivering, on their respective output nodes, the shaped low bitrate input data signal, and a high bitrate receiver for receiving the signals at output nodes of the first and second single ended output drivers, and for generating a high bitrate output data signal on the output port. ## Claims ### Claim 1 A communication system comprising: at least one transceiver circuit; and a single-ended transmission medium including an inner conductor and a conductive shield layer, the inner conductor being coupled to the transceiver circuit by means of a first transmission line, and the conductive shield layer of the transmission medium being coupled to the transceiver circuit by means of a second transmission line, wherein a first impedance is coupled to the first transmission line for device power communication, the first impedance comprising at least one ferrite bead, the communication system being adapted for allowing DC current for the device power communication, and the first transmission line comprises an AC coupling capacitor, wherein the first impedance is connected with a first lead to the first transmission line between the AC coupling capacitor and the connection to the inner conductor of the single-ended transmission medium and is connected with a second lead directly to a power supply. ### Claim 2 (depends on 1) The communication system according to claim 1, the first impedance being coupled between a power supply node and the first transmission line, the communication system further comprising a decoupling capacitor coupled between the power supply node and ground. ### Claim 3 (depends on 1) The communication system according to claim 1, wherein the first impedance comprises the at least one ferrite bead coupled in series with an inductor. ### Claim 4 (depends on 1) The communication system according to claim 1, wherein a second impedance is coupled to the second transmission line. ### Claim 5 (depends on 4) The communication system according to claim 4, wherein the second impedance comprises at least one ferrite bead. ### Claim 6 (depends on 5) The communication system according to claim 5, wherein the second impedance has the same constitution and value as the first impedance. ### Claim 7 (depends on 4) The communication system according to claim 4, the second transmission line comprising an AC coupling capacitor and a termination resistor, wherein the second impedance is connected with a first lead to the second transmission line between the AC coupling capacitor and the termination resistor. ### Claim 8 (depends on 7) The communication system according to claim 7, wherein the second impedance is connected with a second lead to a node, and wherein the termination resistor is terminated to said node. ### Claim 9 (depends on 8) The communication system according to claim 8, wherein the second impedance is connected with the second lead to ground. ### Claim 10 (depends on 1) The communication system according to claim 1, wherein the single-ended transmission medium is adapted for utilizing a common path for both transmission and reception. ### Claim 11 (depends on 1) The communication system according to claim 1, wherein the second transmission line includes an AC coupling capacitor and a termination resistor, wherein a second impedance is connected with a first lead to the second transmission line between the AC coupling capacitor and the termination resistor and is connected with a second lead to ground. ### Claim 12 A communication system comprising: at least one transceiver circuit; and a single-ended transmission medium including an inner conductor and a conductive shield layer, the inner conductor being coupled to the transceiver circuit by means of a first transmission line, and the conductive shield layer of the transmission medium being coupled to the transceiver circuit by means of a second transmission line, wherein a first impedance is coupled to the first transmission line for device power communication, the communication system being adapted for allowing DC current for the device power communication, and wherein the first impedance comprises four ferrite beads connected as twice a series of two ferrite beads, these series connections being coupled in parallel, and this parallel coupling being connected in series to an inductance. ### Claim 13 A communication system comprising: at least one transceiver circuit; and a single-ended transmission medium including an inner conductor and a conductive shield layer, the inner conductor being coupled to the transceiver circuit by means of a first transmission line, and the conductive shield layer of the transmission medium being coupled to the transceiver circuit by means of a second transmission line, wherein a first impedance is coupled to the first transmission line for device power communication, the first impedance comprising at least one ferrite bead, the communication system being adapted for allowing DC current for the device power communication, the first transmission line comprises an AC coupling capacitor, wherein the first impedance is connected to the first transmission line between the AC coupling capacitor and the connection to the inner conductor of the single-ended transmission medium, and wherein the second transmission line includes an AC coupling capacitor and a termination resistor, wherein a second impedance is connected with a first lead to the second transmission line between the AC coupling capacitor and the termination resistor and is connected with a second lead to ground. ### Claim 14 (depends on 13) The communication system according to claim 13, the first impedance being coupled between a power supply node and the first transmission line, the communication system further comprising a decoupling capacitor coupled between the power supply node and ground. ### Claim 15 (depends on 13) The communication system according to claim 13, wherein the first impedance comprises the at least one ferrite bead coupled in series with an inductor. ### Claim 16 (depends on 13) The communication system according to claim 13, wherein the second impedance comprises at least one ferrite bead. ### Claim 17 (depends on 16) The communication system according to claim 16, wherein the second impedance has the same constitution and value as the first impedance. ### Claim 18 (depends on 13) The communication system according to claim 13, wherein the second impedance is connected with a second lead to a node, and wherein the termination resistor is terminated to said node. ### Claim 19 (depends on 13) The communication system according to claim 13, wherein the single ended transmission medium is adapted for utilizing a common path for both transmission and reception.