WO2015058403A1 - 铜线接口电路 - Google Patents
铜线接口电路 Download PDFInfo
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- WO2015058403A1 WO2015058403A1 PCT/CN2013/085953 CN2013085953W WO2015058403A1 WO 2015058403 A1 WO2015058403 A1 WO 2015058403A1 CN 2013085953 W CN2013085953 W CN 2013085953W WO 2015058403 A1 WO2015058403 A1 WO 2015058403A1
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- Prior art keywords
- impedance
- value
- sub
- pass filter
- much greater
- Prior art date
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 239000003990 capacitor Substances 0.000 claims description 63
- 230000000903 blocking effect Effects 0.000 claims description 45
- 238000012545 processing Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 230000009466 transformation Effects 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 abstract description 16
- 238000010586 diagram Methods 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 9
- 238000005070 sampling Methods 0.000 description 9
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
- H04B3/23—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/56—Modifications of input or output impedances, not otherwise provided for
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/03—Hybrid circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
- H04B3/21—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a set of bandfilters
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/387—A circuit being added at the output of an amplifier to adapt the output impedance of the amplifier
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/423—Amplifier output adaptation especially for transmission line coupling purposes, e.g. impedance adaptation
Definitions
- the present invention relates to communication technologies, and in particular, to a copper wire interface circuit. Background technique
- G.Fast Gigabit copper
- G.fast is an access technology for transmitting ultra-high-rate bandwidth over short-distance twisted-pair lines. .
- G.fast's high-band initial stage will use 106MHz and can be extended to 212MHz.
- the higher the frequency the higher the bandwidth G.fast can obtain.
- the higher the signal frequency the shorter the transmission distance, and the greater the cost and power consumption.
- G.fast does not use the FDD frequency division method similar to VDSL2 in the uplink and downlink rate division, but uses the TDD time division multiplexing method to allocate uplink and downlink traffic with different time windows.
- G.Fast technology compared to existing DSL technology, uses a wide range of signal frequencies to high frequencies, while making crosstalk between different ports in a bundle of cables much more severe than existing DSL technologies. Whether the termination impedance of a user port connected to the cable is matched or not will not only affect the crosstalk between other pairs, but also affect the transmission characteristics of other pairs in the cable. According to the definition of impedance matching, impedance matching refers to the specific matching relationship between load impedance, cable characteristic impedance and internal impedance of the signal during signal transmission. Therefore, the port impedance needs to be kept constant regardless of whether the port is in the transmit, receive, activate, or deactivate state.
- the user port is connected to the cable adopting the G.Fast technology through an interface circuit.
- the interface circuit adopts the feature of TDD time division multiplexing according to the G.Fast technology, when receiving the signal transmitted by the cable.
- the port When the port is in the deactivated state, the device related to the transmission of the interface circuit will stop working. Similarly, when the signal is sent to the cable, the device receiving the relevant circuit domain will stop working.
- the impedance characteristics of the device may change, resulting in a user port.
- the termination impedance cannot be matched, which causes the mutual crosstalk between the pairs to change, and the transmission characteristics at both ends of the pair change, resulting in a decrease in the transmission stability of the cable.
- Summary of the invention The embodiment of the invention provides a copper wire interface circuit, which can avoid the change of the transmission characteristics of the two ends of the pair and improve the transmission stability of the cable.
- a first aspect of the present invention provides a copper wire interface circuit comprising:
- One end of the current output type amplifier is connected to the port impedance component, and the other end of the current output type amplifier is connected to the transmitting end, the current output type amplifier is for amplifying a signal to be transmitted, and the output of the current output type amplifier has High impedance characteristics;
- the port impedance component is further connected to a high-pass filter, and the impedance of the port impedance component is impedance-converted by a high-pass filter for impedance matching with an equivalent impedance of the cable and the load; a port impedance component is connected, the other end of the high-pass filter is connected to the cable, and the high-pass filter is configured to filter a signal to be transmitted or a received signal, and perform impedance transformation on the port impedance component;
- the echo cancellation module is connected to the port impedance component, and the other end of the echo cancellation module is connected to the receiving end.
- the echo cancellation module is used for sampling processing of the received signal, and is also used for sending Signal cancellation processing.
- the port impedance component includes: a first impedance, a second impedance, and a third impedance
- One end of the first impedance is connected to one end of the second impedance, and the other end of the first impedance is connected to one end of the third impedance;
- One end of the second impedance is further connected to the current output type amplifier, and the other end of the second impedance is further connected to an input pin of the high pass filter;
- One end of the third impedance is further connected to the current output type amplifier, and the other end of the third impedance is further connected to another input pin of the high pass filter;
- the value of the first impedance is much larger than the value of the second impedance, and the value of the first impedance is much larger than the value of the third impedance, and the value of the second impedance is The third impedance is equal in value;
- the echo cancellation module includes: a fourth impedance, a fifth impedance, a sixth impedance, and a seventh impedance; one end of the fourth impedance is connected to one end of the fifth impedance, and the other end of the fourth impedance is One end of the second impedance is connected, and one end of the fourth impedance is further connected to the receiving end; one end of the fifth impedance is further connected to the receiving end, and the other end of the fifth impedance is opposite to the third end The other end of the impedance is connected; One end of the sixth impedance is connected to one end of the seventh impedance, the other end of the sixth impedance is connected to one end of the third impedance, and one end of the sixth impedance is further connected to the receiving end; One end of the seventh impedance is further connected to the receiving end, and the other end of the seventh impedance is connected to the other end of the second impedance;
- the fourth impedance is the same as the value of the sixth impedance
- the fifth impedance is the same as the seventh impedance
- the value of the fourth impedance is much larger than the value of the first impedance.
- the value of the fourth impedance is much larger than the value of the second impedance, and the value of the fourth impedance is much larger than the value of the third impedance, and the value of the fifth impedance is much larger than the value.
- the value of the first impedance, the value of the fifth impedance is much larger than the value of the second impedance, and the value of the fifth impedance is much larger than the value of the third impedance.
- the first impedance includes: a first sub-impedance, a second sub-impedance;
- the first sub-impedance is connected in series with the second sub-impedance, and a reference power source is connected between the first sub-impedance and the second sub-impedance;
- the value of the first sub-impedance is the same as the value of the second sub-impedance.
- the port impedance component includes: an eighth impedance, a ninth impedance;
- One end of the eighth impedance is connected to the current output type amplifier, and one end of the eighth impedance is further connected to one input pin of the high pass filter, and the other end of the eighth impedance is connected to the current output.
- An amplifier is connected, and one end of the eighth impedance is further connected to another input pin of the high pass filter;
- the ninth impedance is coupled between the two center taps of the transformer of the high pass filter
- the value of the eighth impedance is much larger than the value of the ninth impedance
- the echo cancellation module includes: a tenth impedance, an eleventh impedance, a twelfth impedance, and a thirteenth impedance;
- One end of the tenth impedance is connected to one end of the eleventh impedance, and the other end of the tenth impedance is connected to one input pin of the high-pass filter, and one end of the tenth impedance is further connected to the receiving end Connection
- One end of the eleventh impedance is further connected to the receiving end, and the other one of the eleventh impedance The end is connected to one end of the ninth impedance;
- One end of the twelfth impedance is connected to one end of the thirteenth impedance, and the other end of the twelfth impedance is connected to another input pin of the high pass filter, one end of the twelfth impedance Also connected to the receiving end;
- One end of the thirteenth impedance is further connected to the receiving end, and the other end of the seventh impedance is connected to the other end of the ninth impedance;
- the tenth impedance is the same as the value of the twelfth impedance, the eleventh impedance is the same as the thirteenth impedance, and the value of the tenth impedance is much larger than the eighth impedance.
- the value of the tenth impedance is much larger than the value of the ninth impedance, and the value of the eleventh impedance is much larger than the value of the eighth impedance, and the eleventh impedance is taken.
- the value is much larger than the value of the ninth impedance.
- the eighth impedance includes: a third sub-impedance, a fourth sub-impedance;
- the third sub-impedance is connected in series with the fourth sub-impedance, and a reference power source is connected between the third sub-impedance and the fourth sub-impedance;
- the value of the third sub-impedance is the same as the value of the fourth sub-impedance.
- the ninth impedance includes: a fifth sub-impedance, a sixth sub-impedance;
- the fifth sub-impedance is connected in series with the sixth sub-impedance, and a reference power source is connected between the fifth sub-impedance and the sixth sub-impedance;
- the value of the fifth sub-impedance is the same as the value of the sixth sub-impedance.
- the port impedance component includes: a fourteenth impedance, a fifteenth impedance, and a sixteenth impedance;
- One end of the fourteenth impedance is connected to one input pin of the high-pass filter, and one end of the fourteenth impedance is further connected to one end of the fifteenth impedance, and the other end of the fourteenth impedance Connected to another input pin of the high-pass filter, the other end of the fourteenth impedance is further connected to one end of the sixteenth impedance;
- the other end of the fifteenth impedance is connected to the current output type amplifier
- the other end of the sixteenth impedance is connected to the current output type amplifier;
- the value of the fourteenth impedance is much larger than the value of the fifteenth impedance, and the value of the fourteenth impedance is much larger than the value of the sixteenth impedance, the fifteenth impedance The value is equal to the value of the sixteenth impedance;
- the echo cancellation module includes: a seventeenth impedance, an eighteenth impedance, a nineteenth impedance, and a twentieth impedance;
- One end of the seventeenth impedance is connected to one end of the eighteenth impedance, and the other end of the seventeenth impedance is connected to the other end of the fifteenth impedance, and one end of the seventeenth impedance is further Receiver connection;
- the other end of the eighteenth impedance is connected to one end of the sixteenth impedance, and one end of the eighteenth impedance is further connected to the receiving end;
- One end of the nineteenth impedance is connected to one end of the twentieth impedance, and the other end of the nineteenth impedance is connected to the other end of the sixteenth impedance, and one end of the nineteenth impedance is further The receiving end is connected;
- the other end of the twentieth impedance is connected to one end of the fifteenth impedance, and a section of the twentieth impedance is further connected to the receiving end;
- the seventeenth impedance is the same as the nineteenth impedance, the eighteenth impedance is the same as the twentieth impedance, and the seventeenth impedance is much larger than the tenth
- the value of the four impedances the value of the seventeenth impedance is much larger than the value of the fifteenth impedance, and the value of the seventeenth impedance is much larger than the value of the sixteenth impedance.
- the value of the eighteenth impedance is much larger than the value of the fourteenth impedance, the value of the eighteenth impedance is much larger than the value of the fifteenth impedance, and the value of the eighteenth impedance is large.
- the value of the sixteenth impedance is much larger than the sixteenth impedance.
- the fourteenth impedance includes: a seventh sub-impedance, an eighth sub-impedance;
- the seventh sub-impedance is connected in series with the eighth sub-impedance, and a reference power source is connected between the seventh sub-impedance and the eighth sub-impedance;
- the value of the seventh sub-impedance is the same as the value of the eighth sub-impedance.
- the high-pass filter includes: a transformer, a DC blocking capacitor;
- the transformer has two input pins and two output pins, wherein one output pin is connected to one end of the cable and the equivalent impedance of the load, and the other output pin is connected to the line. The other end of the cable and the equivalent impedance of the load are connected;
- the blocking capacitor is connected between the first two taps of the transformer; or one end of the DC blocking capacitor is connected to one output pin of the transformer, and the other end of the DC blocking capacitor is connected to the line One end of the equivalent impedance of the cable and the load; or
- the DC blocking capacitor comprises: a first sub-capacitor that is separated by a straight, and a second sub-capacitor that is separated;
- One end of the blocking first sub-capacitor is connected to one output pin of the transformer, and the other end of the blocking first sub-capacitor is connected to one end of the cable and the equivalent impedance of the load;
- One end of the blocking second sub-capacitor is connected to another output pin of the transformer, and the other end of the blocking second sub-capacitor is connected to the other end of the cable and the equivalent impedance of the load.
- the secondary two taps of the transformer are connected;
- the second tap of the transformer is connected to a reference power supply; or the high pass filter further includes: a capacitor;
- the capacitor is connected between the two taps of the transformer.
- the ninth impedance is connected between the secondary two center taps of the transformer .
- the copper wire interface circuit provided in this embodiment is connected to the port impedance component through one end of the current output type amplifier, and the other end of the current output type amplifier is connected to the transmitting end, and the current output type amplifier is used for amplifying the signal to be transmitted, and outputting the current.
- the output of the amplifier has high impedance characteristics
- the port impedance component is also connected to the high-pass filter
- the port impedance component is impedance-transformed by the high-pass filter for impedance matching with the equivalent impedance of the cable and the load.
- One end of the high-pass filter is connected to the port impedance component, and the other end of the high-pass filter is connected to the cable.
- the high-pass filter filters the signal to be transmitted or the received signal, and performs impedance transformation on the port impedance component.
- One end of the echo cancellation module is connected to the port impedance component, and the other end of the echo cancellation module is connected to the receiving end, and the echo cancellation module is used for sampling processing of the received signal and cancellation processing of the signal to be transmitted. Therefore, when the component related to reception is turned off during transmission or the component related to transmission is turned off in order to reduce power consumption, since the output impedance of the current output type amplifier is high impedance, the port impedance is mainly composed of the port impedance component and Qualcomm. Filter composition.
- the output impedance of the current output amplifier is much higher than the impedance of the port impedance component when the current output amplifier is turned off.
- the state change of the current output amplifier has essentially no effect on the port impedance. Therefore, the specific matching relationship between the termination impedance of the user port and the characteristic impedance of the cable and the impedance within the source is unchanged. Further, the mutual crosstalk between the pairs is changed, and the transmission characteristics of the pair are avoided, and the transmission stability of the cable is improved.
- FIG. 1 is a schematic structural diagram of a copper wire interface circuit according to Embodiment 1 of the present invention
- FIG. 2 is a schematic structural diagram of a copper wire interface circuit according to Embodiment 2 of the present invention
- FIG. 3 is a second embodiment of the present invention.
- FIG. 4 is a schematic structural diagram of a copper wire interface circuit according to Embodiment 3 of the present invention
- FIG. 5 is another copper wire interface according to Embodiment 3 of the present invention
- FIG. 6 is a schematic structural diagram of a copper wire interface circuit according to Embodiment 4 of the present invention
- FIG. 7 is a schematic structural diagram of another copper wire interface circuit according to Embodiment 4 of the present invention.
- the copper wire interface circuit includes: a current output type amplifier 10, a port impedance component 11, a high pass filter 12, and an echo. Offset module 13.
- One end of the current output type amplifier 10 is connected to the port impedance component, the other end of the current output type amplifier 10 is connected to the transmitting end, and the current output type amplifier 10 is used to input the signal to be transmitted.
- the line amplification, the output of the current output type amplifier 10 has a high impedance characteristic.
- the port impedance component 11 is also coupled to the high pass filter 12, and the impedance of the port impedance component is impedance transformed by the high pass filter 12 for impedance matching with the equivalent impedance of the cable and the load.
- the high-pass filter 12 includes a transformer, and the primary-to-secondary ratio of the transformer is variable, it is necessary to set the value of the port impedance component according to the proportional relationship between the primary and secondary, in the copper wire.
- an impedance value obtained by the impedance conversion of the port impedance component through the high-pass filter 12 can be impedance matched with the equivalent impedance of the cable and the load. For example, assuming that the characteristic impedance of the twisted pair cable is Z0, the load impedance is also designed according to Z0.
- the port impedance component 11 should be designed in accordance with Z0/(n*n).
- the impedance of the port impedance component 11 Z0/(n*n) after transformer transformation is Z0.
- the equivalent impedance of the cable and the load is the comprehensive equivalent impedance of the cable and the load of a certain length.
- the characteristic impedance of the cable is Z0
- the load impedance is Z0
- the equivalent impedance of the cable and the load is also Z0.
- the high-pass filter 12-terminal is connected to the port impedance component 11, and the other end of the high-pass filter 12 is connected to a cable.
- the high-pass filter 12 filters the signal to be transmitted or received, and performs impedance transformation on the port impedance component 11.
- the echo canceling module 13 is connected to the port impedance component, and the other end of the echo canceling module 13 is connected to the receiving end.
- the echo canceling module 13 is used for sampling processing of the received signal, and is also used for canceling processing of the signal to be transmitted.
- the copper wire interface circuit provided in this embodiment is connected to the port impedance component through one end of the current output type amplifier, and the other end of the current output type amplifier is connected to the transmitting end, and the current output type amplifier is used for amplifying the signal to be transmitted, and outputting the current.
- the output of the amplifier has high impedance characteristics
- the port impedance component is also connected to the high-pass filter
- the port impedance component is impedance-transformed by the high-pass filter for impedance matching with the equivalent impedance of the cable and the load.
- One end of the high-pass filter is connected to the port impedance component, and the other end of the high-pass filter is connected to the cable.
- the high-pass filter filters the signal to be transmitted or the received signal, and performs impedance transformation on the port impedance component.
- One end of the echo cancellation module is connected to the port impedance component, and the other end of the echo cancellation module is connected to the receiving end, and the echo cancellation module is used for sampling processing of the received signal and cancellation processing of the signal to be transmitted.
- the components related to reception are turned off at the time of transmission or turned off at the time of reception.
- the port impedance is mainly composed of the port impedance component and the high pass filter.
- the state change of the current output amplifier has substantially no effect on the port impedance. Therefore, the specific matching relationship between the termination impedance of the user port and the characteristic impedance of the cable and the impedance within the source is unchanged. Further, the mutual crosstalk between the pairs is changed, and the transmission characteristics of the pair are avoided, and the transmission stability of the cable is improved.
- the copper wire interface circuit provided by the present invention, it can be implemented in a plurality of possible implementation manners. Various possible implementation manners are described below through specific embodiments.
- the port impedance component 11 includes: a first impedance 111, a second impedance 112, and a third impedance 113.
- One end of the first impedance 111 is connected to one end of the second impedance 112, and the other end of the first impedance 111 is connected to one end of the third impedance 113.
- One end of the second impedance 112 is also connected to the current output type amplifier 10, and the other end of the second impedance 112 is also connected to an input pin of the high pass filter 12.
- One end of the third impedance 113 is also connected to the current output type amplifier 10, and the other end of the third impedance 113 is also connected to the other input pin of the high pass filter 12.
- the value of the first impedance 111 is much larger than the value of the second impedance 112, and the value of the first impedance 111 is much larger than the value of the third impedance 113, the second impedance.
- the value of 112 is equal to the value of the third impedance 113.
- the concept of "far greater than” in the present embodiment and the following embodiments means that one value is at least three times larger than the other value, for example, the value of the first impedance 111 is at least greater than the second impedance.
- the value of 112 is 3 times. Therefore, as long as one value is ensured to be at least 3 times larger than the other value, the requirement of "far greater than” in the various embodiments of the present invention can be satisfied, and the specific multiple is set by the line designer according to experience, and is not given here. limit.
- the echo cancellation module 13 includes: a fourth impedance 131, a fifth impedance 132, a sixth impedance 133, and a seventh impedance 134.
- One end of the fourth impedance 131 is connected to one end of the fifth impedance 132, and the fourth The other end of the impedance 131 is connected to one end of the second impedance 112, and one end of the fourth impedance 131 is also connected to the receiving end.
- One end of the fifth impedance 132 is also connected to the receiving end, and the other end of the fifth impedance 132 is connected to the other end of the third impedance 113.
- One end of the sixth impedance 133 is connected to one end of the seventh impedance 134, the other end of the sixth impedance 133 is connected to one end of the third impedance 113, and one end of the sixth impedance 133 is also received. End connection.
- One end of the seventh impedance 134 is also connected to the receiving end, and the other end of the seventh impedance 134 is connected to the other end of the second impedance 112.
- the fourth impedance 131 is the same as the value of the sixth impedance 133, the fifth impedance 132 is the same as the seventh impedance 134, and the value of the fourth impedance 131 is much larger than the first
- the value of the impedance 111 the value of the fourth impedance 131 is much larger than the value of the second impedance 112, and the value of the fourth impedance 131 is much larger than the value of the third impedance 113.
- the value of the fifth impedance 132 is much larger than the value of the first impedance 111, the value of the fifth impedance 132 is much larger than the value of the second impedance 112, and the value of the fifth impedance 132 is large.
- the value of the third impedance 113 is much larger than the value of the third impedance 113.
- the high pass filter 12 includes: a transformer 121 and a DC blocking capacitor 122.
- the transformer 121 has two input pins and two output pins, wherein one output pin is connected to one end of the equivalent impedance of the cable and the load, and the other output pin is equivalent to the equivalent impedance of the cable and the load. Connected at one end.
- a DC blocking capacitor 122 is connected between the primary two taps of the transformer 121.
- one end of the DC blocking capacitor 122 is connected to one output pin of the transformer 121, and the other end of the DC blocking capacitor 122 is connected to one end of the cable and the equivalent impedance of the load.
- the DC blocking capacitor 122 includes: a first sub-capacitor that is separated by a straight and a second sub-capacitor.
- One end of the blocking first sub-capacitor is connected to one output pin of the transformer 121, and the other end of the blocking first sub-capacitor is connected to one end of the cable and the equivalent impedance 14 of the load.
- One end of the blocking second sub-capacitor is connected to the other output pin of the transformer 121, and the other end of the blocking second sub-capacitor is connected to the other end of the cable and the equivalent impedance 14 of the load.
- one possible implementation manner is that the secondary two taps of the transformer 121 are connected. or,
- the secondary two taps of the transformer 121 are connected to a reference power supply 123.
- the high pass filter 12 further includes: a capacitor.
- a capacitor is connected between the two taps of the transformer 121.
- the current output type amplifier 10 is used, and the output of the current output type amplifier 10 is a high impedance characteristic.
- the output of the current output type amplifier 10 is high impedance with respect to the port impedance component, and the current output type When the amplifier 10 is turned off, the output of the current output type amplifier 10 is also high impedance.
- the port impedance is mainly determined by the port impedance component and a high-pass filter composed of a transformer. The opening and closing of the current output amplifier 10 does not affect the port impedance; the first impedance 111, the second impedance 112, and the third impedance 113 are formed by the resistance network.
- the main impedance port impedance component 11 is transformed by a high-pass filter module composed of a transformer, and matched with the equivalent impedance 14 of the cable and the load; the second impedance 112 and the third impedance 113 are sampling resistors in the receiving direction; generally lowering The power consumption, the value of the first impedance 111 will be much larger than the second impedance 112 and the third impedance 113.
- FIG. 3 is a schematic structural diagram of another copper wire interface circuit according to Embodiment 2 of the present invention. It should be noted that, except for the copper shown in FIG. 3 on the first impedance 111. The line interface circuit has been improved, and other components are completely identical to those shown in FIG. 2 and will not be described again here.
- the first impedance 111 includes: a first sub-impedance l l la , a second sub-impedance l l lb o
- the first sub-impedance 111a is connected in series with the second sub-impedance 111b, and a reference power source 114 is connected between the first sub-impedance 111a and the second sub-impedance 111b.
- the value of the first sub-impedance 111a is the same as the value of the second sub-impedance 111b.
- the port impedance component 11 includes: an eighth impedance 115 and a ninth impedance 116.
- One end of the eighth impedance 115 is connected to the current output type amplifier 10, one end of the eighth impedance 115 is also connected to one input pin of the high pass filter 12, and the other end of the eighth impedance 115 is connected to the current output type amplifier 10, and the eighth One end of the impedance 115 is also connected to the other input pin of the high pass filter 12.
- a ninth impedance 116 is coupled between the two center taps of the transformer 121 in the high pass filter 12.
- the ninth impedance 116 is connected between the secondary two taps of the transformer 121.
- the value of the eighth impedance 115 is much larger than the value of the ninth impedance 116.
- the echo cancellation module 13 includes: a tenth impedance 135, an eleventh impedance 136, and a twelfth impedance
- One end of the tenth impedance 135 is connected to one end of the eleventh impedance 136, the other end of the tenth impedance 135 is connected to one input pin of the high-pass filter 12, and one end of the tenth impedance 135 is also connected to the receiving end.
- One end of the eleventh impedance 136 is also connected to the receiving end, and the other end of the eleventh impedance 136 is connected to one end of the ninth impedance 116.
- One end of the twelfth impedance 137 is connected to one end of the thirteenth impedance 138, the other end of the twelfth impedance 137 is connected to the other input pin of the high pass filter 12, and one end of the twelfth impedance 137 is also connected to the receiving end. .
- One end of the thirteenth impedance 138 is also connected to the receiving end, and the other end of the seventh impedance 134 is connected to the other end of the ninth impedance 116.
- the tenth impedance 135 is the same as the twelfth impedance 137, the eleventh impedance 136 is the same as the thirteenth impedance 138, and the value of the tenth impedance 135 is much larger than the value of the eighth impedance 115.
- the value of the tenth impedance 135 is much larger than the value of the ninth impedance 116, and the value of the eleventh impedance 136 is much larger than the value of the eighth impedance 115, the eleventh impedance.
- the value of 136 is much larger than the value of the ninth impedance 116.
- the high pass filter 12 includes: a transformer 121 and a DC blocking capacitor 122.
- the transformer 121 has two input pins and two output pins, wherein one output pin is connected to one end of the equivalent impedance of the cable and the load, and the other output pin is equivalent to the equivalent impedance of the cable and the load. Connected at one end.
- a DC blocking capacitor 122 is connected between the primary two taps of the transformer 121.
- one end of the DC blocking capacitor 122 is connected to one output pin of the transformer 121, and the other end of the DC blocking capacitor 122 is connected to one end of the cable and the equivalent impedance 14 of the load.
- the DC blocking capacitor 122 includes: a first vertical sub-capacitor, and a second sub-capacitor. One end of the blocking first sub-capacitor is connected to one output pin of the transformer 121, and the other end of the blocking first sub-capacitor is connected to one end of the cable and the equivalent impedance of the load.
- One end of the blocking second sub-capacitor is connected to the other output pin of the transformer 121, and the other end of the blocking second sub-capacitor is connected to the other end of the cable and the equivalent impedance of the load.
- one possible implementation is that the secondary two taps of the transformer 121 are connected. Or,
- the secondary two taps of the transformer 121 are connected to a reference power supply.
- the high pass filter 12 further includes: a capacitor.
- a capacitor is connected between the two taps of the transformer 121.
- the current output type amplifier 10 is used, and the output of the current output type amplifier 10 is a high impedance characteristic; the port impedance component 11 mainly composed of the eighth impedance 115 and the ninth impedance 116 of the resistance network is impedance-transformed by the transformer 121, and the line The equivalent impedance 14 of the cable and the load is matched; the ninth impedance 116 is the sampling resistance of the receiving direction; generally, to reduce the power consumption, the value of the eighth impedance 115 is much larger than the ninth impedance 116.
- the echo cancellation module 13 includes an impedance network tenth impedance 135, an eleventh impedance 136, a twelfth impedance 137 and a thirteenth impedance 138, wherein the tenth impedance 135, the eleventh impedance 136, the twelfth impedance 137, and the The thirteen impedance 138 samples the voltage across the ninth impedance 116 resistor and the secondary voltage of the transformer 121, respectively, to complete sampling of the received signal and cancellation of the signal in the transmit direction.
- the impedances of the tenth impedance 135 and the eleventh impedance 136 are much larger than the eighth impedance 115 and the ninth impedance 116.
- FIG. 5 is a schematic structural diagram of another copper wire interface circuit according to Embodiment 3 of the present invention. It should be noted that, except that the eighth impedance 115 and the ninth impedance 116 are in FIG. 5. The copper wire interface circuit shown is improved, and other components are completely identical to those shown in FIG. 4 and will not be described again here. As shown in FIG. 5, the eighth impedance 115 includes: a third sub-impedance 115a and a fourth sub-impedance 115b.
- the third sub-impedance 115a is connected in series with the fourth sub-impedance 115b, and a reference power source 114 is connected between the third sub-impedance 115a and the fourth sub-impedance 115b.
- the value of the third sub-impedance 115a is the same as the value of the fourth sub-impedance 115b.
- the eighth impedance 115 is an impedance
- the ninth impedance 116 includes: a fifth sub-impedance and a sixth sub-impedance.
- the fifth sub-impedance is connected in series with the sixth sub-impedance, and a reference power supply is connected between the fifth sub-impedance and the sixth sub-impedance.
- the value of the fifth sub-impedance is the same as the value of the sixth sub-impedance.
- the form of the sixth sub-impedance is similar to the splitting of the eighth impedance 115, which is not shown here.
- FIG. 6 is a schematic structural diagram of a copper wire interface circuit according to Embodiment 4 of the present invention.
- the port impedance component 11 includes: a fourteenth impedance 117, a fifteenth impedance 118, and a sixteenth impedance 119. .
- One end of the fourteenth impedance 117 is connected to one input pin of the high-pass filter 12, one end of the fourteenth impedance 117 is also connected to one end of the fifteenth impedance 118, and the other end of the fourteenth impedance 117 is connected to the high-pass filter 12 The other input pin is connected, and the other end of the fourteenth impedance 117 is also connected to one end of the sixteenth impedance 119.
- the other end of the fifteenth impedance 118 is connected to the current output type amplifier 10.
- the other end of the sixteenth impedance 119 is connected to the current output type amplifier 10.
- the value of the fourteenth impedance 117 is much larger than the value of the fifteenth impedance 118, and the value of the fourteenth impedance 117 is much larger than the value of the sixteenth impedance 119.
- the value of the fifteenth impedance 118 is equal to the value of the sixteenth impedance 119.
- the echo cancellation module 13 includes: a seventeenth impedance 139, an eighteenth impedance 1310, a nineteenth impedance 1311, and a twentieth impedance 1312.
- One end of the seventeenth impedance 139 is connected to one end of the eighteenth impedance 1310, and the other end of the seventeenth impedance 139 is connected to the other end of the fifteenth impedance 118, and one end of the seventeenth impedance 139 is also connected to the receiving end.
- the other end of the eighteenth impedance 1310 is connected to one end of the sixteenth impedance 119, and one end of the eighteenth impedance 1310 is also connected to the receiving end.
- One end of the nineteenth impedance 1311 is connected to one end of the twentieth impedance 1312, the other end of the nineteenth impedance 1311 is connected to the other end of the sixteenth impedance 119, and one end of the nineteenth impedance 1311 is also connected to the receiving end.
- the other end of the twentieth impedance 1312 is connected to one end of the fifteenth impedance 118, and a section of the twentieth impedance 1312 is also connected to the receiving end.
- the seventeenth impedance 139 and the nineteenth impedance 1311 are the same, the eighteenth impedance 1310 is the same as the twentieth impedance 1312, and the seventeenth impedance 139 is much larger than the fourteenth impedance 117.
- the value of the seventeenth impedance 139 is much larger than the value of the fifteenth impedance 118, and the value of the seventeenth impedance 139 is much larger than the value of the sixteenth impedance 119.
- the value of the eighteenth impedance 1310 is much larger than the value of the fourteenth impedance 117, and the value of the eighteenth impedance 1310 is much larger than the value of the fifteenth impedance 118, the tenth The value of the eight impedance 1310 is much larger than the value of the sixteenth impedance 119.
- the high pass filter 12 includes: a transformer 121 and a DC blocking capacitor 122.
- the transformer 121 has two input pins and two output pins, wherein one output pin is connected to one end of the cable and the equivalent impedance 14 of the load, and the other output pin has an equivalent impedance to the cable and the load 14 The other end of the connection.
- a DC blocking capacitor 122 is connected between the primary two taps of the transformer 121.
- one end of the DC blocking capacitor 122 is connected to one output pin of the transformer 121, and the other end of the DC blocking capacitor 122 is connected to one end of the cable and the equivalent impedance 14 of the load.
- the DC blocking capacitor 122 includes: a first sub-capacitor that is separated by a straight and a second sub-capacitor.
- One end of the first blocking sub-capacitor is connected to one output pin of the transformer, and the other end of the blocking first sub-capacitor is connected to one end of the cable and the equivalent impedance of the load.
- One end of the second sub-capacitor is connected to the other output pin of the transformer, and the other end of the second sub-capacitor is connected to the other end of the equivalent impedance of the cable and the load.
- one possible implementation is that the secondary two taps of the transformer 121 are connected. Or,
- the secondary two taps of the transformer 121 are connected to a reference power supply.
- the high pass filter 12 further includes: a capacitor.
- a capacitor is connected between the two taps of the transformer 121.
- the current output type amplifier 10 is used, and the output of the amplifier is a high impedance characteristic.
- the output of the current output type amplifier 10 is high impedance with respect to the port impedance component, and the current output type amplifier 10 is turned off.
- the output of the current output type amplifier 10 is also high impedance.
- the port impedance is mainly determined by the port impedance component and the high-pass filter consisting of a transformer, current
- the opening and closing of the output amplifier 10 does not affect the port impedance
- the port impedance component mainly composed of the fourteenth impedance 117 of the resistor network is impedance-converted by the transformer 121, and matches the equivalent impedance 14 of the cable and the load
- the five impedances 118 and the sixteenth impedances 119 are sampling resistors in the receiving direction; generally, to reduce power consumption, the value of the fourteenth impedance 117 is much larger than the fifteenth impedance 118 and the sixteenth impedance 119.
- the echo cancellation module 13 includes a seventeenth impedance 139, an eighteenth impedance 1310, a nineteenth impedance 1311 and a twentieth impedance 1312 of the impedance network, wherein the seventeenth impedance 139, the eighteenth impedance 1310, and the nineteenth impedance 1311 And the twentieth impedance 1312 samples the voltages on the two sides of the fifteenth impedance 118 and the sixteenth impedance 119, respectively, to complete sampling of the received signal and cancellation of the signal in the transmission direction.
- the impedance of the seventeenth impedance 139 and the eighteenth impedance 1310 is much larger than the fourteenth impedance 117, the fifteenth impedance 118, and the sixteenth impedance 119.
- FIG. 7 is a schematic structural diagram of another copper wire interface circuit according to Embodiment 4 of the present invention. It should be noted that, except for the fourteenth impedance 117, the copper shown in FIG. The line interface circuit has been improved, and other components are completely identical to those shown in FIG. 6 and will not be described again here. As shown in FIG. 7, the fourteenth impedance 117 includes: a seventh sub-impedance 1 17a and an eighth sub-impedance 117b.
- the seventh sub-impedance 117a is connected in series with the eighth sub-impedance 117b, and a reference power supply is connected between the seventh sub-impedance 1 17a and the eighth sub-impedance 1 17b.
- the value of the seventh sub-impedance 1 17a is the same as the value of the eighth sub-impedance 117b.
- the foregoing storage medium includes: a medium such as a ROM, a RAM, a magnetic disk, or an optical disk that can store program codes.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Telephone Function (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
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JP2016525884A JP6360169B2 (ja) | 2013-10-25 | 2013-10-25 | 銅線インターフェース回路 |
PCT/CN2013/085953 WO2015058403A1 (zh) | 2013-10-25 | 2013-10-25 | 铜线接口电路 |
KR1020167012928A KR101897526B1 (ko) | 2013-10-25 | 2013-10-25 | 구리 배선 인터페이스 회로 |
EP13896081.0A EP3048741B1 (en) | 2013-10-25 | 2013-10-25 | Copper wire interface circuit |
CN201380002108.8A CN104813592B (zh) | 2013-10-25 | 2013-10-25 | 铜线接口电路 |
US15/136,476 US9742463B2 (en) | 2013-10-25 | 2016-04-22 | Copper wire interface circuit |
Applications Claiming Priority (1)
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PCT/CN2013/085953 WO2015058403A1 (zh) | 2013-10-25 | 2013-10-25 | 铜线接口电路 |
Related Child Applications (1)
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US15/136,476 Continuation US9742463B2 (en) | 2013-10-25 | 2016-04-22 | Copper wire interface circuit |
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WO2015058403A1 true WO2015058403A1 (zh) | 2015-04-30 |
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US (1) | US9742463B2 (zh) |
EP (1) | EP3048741B1 (zh) |
JP (1) | JP6360169B2 (zh) |
KR (1) | KR101897526B1 (zh) |
CN (1) | CN104813592B (zh) |
WO (1) | WO2015058403A1 (zh) |
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WO2015196188A1 (en) * | 2014-06-20 | 2015-12-23 | Ikanos Communications, Inc. | Dual band analog front end for high speed data transmissions in dmt systems |
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EP1155507B1 (de) * | 1999-02-25 | 2002-08-28 | Infineon Technologies AG | Schaltung zur gemeinsamen übertragung von sprache und daten über eine telefonleitung |
JP2001007739A (ja) * | 1999-06-24 | 2001-01-12 | Nec Corp | 通信装置 |
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JP3607639B2 (ja) * | 2001-05-09 | 2005-01-05 | 日本電気通信システム株式会社 | 2線4線変換回路 |
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2013
- 2013-10-25 EP EP13896081.0A patent/EP3048741B1/en active Active
- 2013-10-25 JP JP2016525884A patent/JP6360169B2/ja active Active
- 2013-10-25 KR KR1020167012928A patent/KR101897526B1/ko active IP Right Grant
- 2013-10-25 CN CN201380002108.8A patent/CN104813592B/zh active Active
- 2013-10-25 WO PCT/CN2013/085953 patent/WO2015058403A1/zh active Application Filing
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2016
- 2016-04-22 US US15/136,476 patent/US9742463B2/en active Active
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WO1999050970A1 (en) * | 1998-03-31 | 1999-10-07 | Telefonaktiebolaget Lm Ericsson (Publ) | A method and an arrangement in an analog line interface circuit |
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Also Published As
Publication number | Publication date |
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CN104813592B (zh) | 2016-12-07 |
CN104813592A (zh) | 2015-07-29 |
EP3048741A4 (en) | 2016-10-05 |
US20160241302A1 (en) | 2016-08-18 |
KR20160072207A (ko) | 2016-06-22 |
KR101897526B1 (ko) | 2018-10-31 |
JP6360169B2 (ja) | 2018-07-18 |
EP3048741B1 (en) | 2018-09-12 |
EP3048741A1 (en) | 2016-07-27 |
JP2016534599A (ja) | 2016-11-04 |
US9742463B2 (en) | 2017-08-22 |
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