CN104079858B - Reverse signal transmission mixing arrangement - Google Patents
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- CN104079858B CN104079858B CN201410332125.4A CN201410332125A CN104079858B CN 104079858 B CN104079858 B CN 104079858B CN 201410332125 A CN201410332125 A CN 201410332125A CN 104079858 B CN104079858 B CN 104079858B
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Abstract
The invention discloses a kind of reverse signal transmission mixing arrangement, in this device, reverse signal is input on primary coil common mode input, the transmission channel of forward signal and reverse signal is connected on a primary coil differential input end, secondary coil difference output end is connected to forward signal receiving system, entering of input resistant matching unit is connected respectively on primary coil differential input end to differential input end, enter and be connected on primary coil common mode input to common mode input, go out and be connected respectively on secondary coil difference output end to differential input end, go out and be connected on secondary coil common mode input to common mode input, reverse signal is added on forward signal transmission channel by the present invention, reduce the impact of reverse signal for forward signal receiving system simultaneously, ensure the quality of reception of forward signal.
Description
Technical field
The present invention relates to a kind of bidirectional signal transmission system, particularly relate to reverse signal transmission mixing arrangement.
Background technology
Along with multimedia audio-video transmitting high speed degree, high stability, the demand of long distance constantly increases, especially the transmission range requirement that monitoring field reaches hundreds of rice is laid, the design problem of coffret becomes and becomes increasingly complex, and becomes an urgent demand of docking port design with the Signal transmissions that minimum passage realizes high-performance high stability low cost.Two-way multimedia signal can be transmitted and control signal will enrich the function of multimedia transmission greatly with minimum passage simultaneously, reduce the cost of channel routing, the various multimedia transmission standards of prior art, such as VGA, DVI, HDMI, DisplayPort, SDI etc., some does not define the function of two-way signaling transmission, although some supports two-way signaling transmission, but need to realize by increasing independently passage, even if achieve the transmission of two-way signaling on a passage, but because long distance passage has very large decay for signal, the interference each other of forward and reverse signal reduces the susceptibility of signal receiving end, shorten transmission range, reverse signal transmission plan of the present invention can solve the mutual interference problem between forward and reverse signal very well, for two-way signaling transmission provides a kind of solution of low-cost and high-performance.
Summary of the invention
Technical problem to be solved by this invention is, the invention provides a kind of reverse signal transmission mixing arrangement, ensureing, under the condition not affecting forward signal reception, reverse signal to be added in same transmission channel, thus realizing mutual glitch-free two-way signaling transmission.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is:
As a kind of reverse signal transmission mixing arrangement of the present invention, comprise
Transformer unit, reverse signal sends filter unit, forward differential signal accepts filter unit, input resistant matching unit and output impedance matching unit, the reverse signal that this reverse signal dispensing device sends sends filter unit through selectable reverse signal and is input on the common mode input of transformer unit primary coil, forward and reverse signal transmission channel are connected on one of them differential input end of transformer unit primary coil, for keeping impedance matching property, at the input termination input resistant matching unit of transformer unit, the forward differential signal that two difference output ends of transformer secondary coil export is connected to forward signal receiving system through the selectable forward differential signal unit that accepts filter, simultaneously at the output termination output impedance matching unit of transformer unit, high pass or the low pass bandwidth of filter unit are adjustable, if realized at chip internal, it is then register switch regulating and controlling bandwidth.
The invention has the beneficial effects as follows:
The present invention transmits mixing arrangement by reverse signal, in forward signal passage side, forward is mixed with reverse signal, at forward signal receiving terminal once using reverse signal as common-mode signal filtering, ensure the normal reception not affecting forward signal, simultaneously by a channel transfer forward and reverse two-way signaling.
Accompanying drawing explanation
Fig. 1 is the application implementation system module figure of reverse signal of the present invention transmission mixing arrangement.
Fig. 2 is a kind of execution mode of reverse signal of the present invention transmission mixing arrangement.
Fig. 3 is the another kind of execution mode of reverse signal of the present invention transmission mixing arrangement.
Fig. 4 is a kind of embodiment of input resistant matching unit in reverse signal of the present invention transmission mixing arrangement.
Fig. 5 is the another kind of embodiment of input resistant matching unit in reverse signal of the present invention transmission mixing arrangement.
Fig. 6 is a kind of embodiment of output impedance matching unit in reverse signal of the present invention transmission mixing arrangement.
Fig. 7 is the another kind of embodiment of output impedance matching unit in reverse signal of the present invention transmission mixing arrangement.
Fig. 8 is a kind of embodiment of low-pass filter unit in reverse signal of the present invention transmission mixing arrangement.
Fig. 9 is the another kind of embodiment of low-pass filter unit in reverse signal of the present invention transmission mixing arrangement.
Figure 10 is a kind of embodiment of high pass filter unit in reverse signal of the present invention transmission mixing arrangement.
Figure 11 is the another kind of embodiment of high pass filter unit in reverse signal of the present invention transmission mixing arrangement.
In figure:
10: bidirectional signal transmission system 100: forward signal dispensing device
101: reverse signal receiving system 102: transmission channel
103: reverse signal transmission mixing arrangement 104: reverse signal dispensing device
105: forward signal receiving system 111: reverse signal sends low-pass filter unit
112: forward signal receives high pass filter unit 121: input resistant matching unit
122: output impedance matching unit
Embodiment
Below in conjunction with the drawings and specific embodiments, reverse signal transmission mixing arrangement of the present invention is described in further detail:
As shown in Figure 1, reverse signal transmission mixing arrangement of the present invention is a part for reverse signal transmission mixing arrangement, bidirectional signal transmission system 10, comprise forward signal dispensing device 100, reverse signal receiving system 101, transmission channel 102, reverse signal transmission mixing arrangement 103, reverse signal dispensing device 104, forward signal receiving system 105.The forward signal that forward signal dispensing device 100 sends transmits mixing arrangement 103 through transmission channel 102 to reverse signal, output to forward signal receiving system 105 by reverse signal transmission mixing arrangement 103 again to receive, the reverse signal that reverse signal dispensing device 104 sends simultaneously inputs to reverse signal transmission mixing arrangement 103, transmit mixing arrangement 103 by reverse signal again to mix with forward signal, receive to reverse signal receiving system 101 through transmission channel 102.Reverse signal transmission mixing arrangement 103 is exported to the target signal filter of forward signal receiving system 105 reverse signal and is only retained forward signal, ensure that the normal reception of forward signal receiving system 105.
A kind of embodiment of reverse signal transmission mixing arrangement 103 as shown in Figure 2, comprise transformer unit 110, reverse signal sends low-pass filter unit 111, and forward signal receives high pass filter unit 112, input resistant matching unit 121, output impedance matching unit 122.This scheme is applicable to the situation of reverse signal frequency lower than forward signal.The reverse signal that reverse signal dispensing device 104 sends is input to the input 501 that reverse signal sends low-pass filter unit 111, the output 502 that reverse signal sends low-pass filter unit 111 is connected on the primary coil common mode input 205 of transformer unit 110, the transmission channel 102 of forward signal and reverse signal is connected on one of them primary coil differential input end 201 of transformer unit 110, the secondary coil difference output end 203 and 204 of transformer unit 110 is connected respectively to two forward signals as the output of forward differential signal and receives on the input 505 of high pass filter unit 112, the output 506 of two forward signal reception high pass filter unit 112 is connected to forward signal receiving system 105.For keeping impedance matching property, increase input resistant matching unit 121 and output impedance matching unit 122 respectively at the input of transformer unit 110 and output.Input resistant matching unit 121 enter the primary coil differential input end 201 and 202 being connected respectively to transformer unit 110 to differential input end 211,212, enter the primary coil common mode input 205 being connected to transformer unit 110 to common mode input 213.Output impedance matching unit 122 go out the secondary coil difference output end 203 and 204 being connected respectively to transformer unit 110 to differential input end 214,215, go out the secondary coil common mode input 206 being connected to transformer unit 110 to common mode input 216.Reverse signal only can be coupled on the primary coil differential input end 201 and 202 of transformer unit 110 as common-mode signal, be cancelled completely at secondary coil difference output end 203 and 204 reverse signal, only remaining forward differential signal, achieves the elimination of reverse signal to forward signal disturbing.Reverse signal sends the radio-frequency component in low-pass filter unit 111 filtering reverse signal simultaneously, reduce the impact on forward signal, forward signal receives reverse signal low-frequency component residual in high pass filter unit 112 filtering forward differential signal, further suppress the interference of reverse signal to forward signal.
The embodiment of reverse signal transmission mixing arrangement 103 as shown in Figure 3, comprises transformer unit 110, reverse signal sends high pass filter unit 113, forward signal receives low-pass filter unit 114, input resistant matching unit 121 and output impedance matching unit 122.This execution mode is applicable to the situation of reverse signal frequency higher than forward signal.The reverse signal that reverse signal dispensing device 104 sends is input to the input 505 that reverse signal sends high pass filter unit 113, the output 506 that reverse signal sends high pass filter unit 113 is connected on the primary coil common mode input 205 of transformer unit 110, the transmission channel 102 of forward signal and reverse signal is connected on one of them primary coil differential input end 201 of transformer unit 110, the secondary coil difference output end 203 and 204 of transformer unit 110 is connected respectively to two forward signals as the output of forward differential signal and receives on the input 501 of low-pass filter units 114, the output 502 of two forward signal reception low-pass filter units 114 is connected to forward signal receiving system 105.For keeping impedance matching property, increase input resistant matching unit 121 and output impedance matching unit 122 respectively at the input of transformer unit 110 and output.Input resistant matching unit 121 enter the primary coil differential input end 201 and 202 being connected respectively to transformer unit 110 to differential input end 211,212, enter the primary coil common mode input 205 being connected to transformer unit 110 to common mode input 213.Output impedance matching unit 122 go out the secondary coil difference output end 203 and 204 being connected respectively to transformer unit 110 to differential input end 214,215, go out the secondary coil common mode input 206 being connected to transformer unit 110 to common mode input 216.Reverse signal only can be coupled on the primary coil differential input end 201 and 202 of transformer unit 110 as common-mode signal, be cancelled completely at secondary coil difference output end 203 and 204 reverse signal, only remaining forward differential signal, achieves the elimination of reverse signal to forward signal disturbing.Reverse signal sends the low-frequency component in high pass filter unit 113 filtering reverse signal simultaneously, reduce the impact on forward signal, forward signal receives reverse signal radio-frequency component residual in low-pass filter unit 114 filtering forward differential signal, further suppress the interference of reverse signal to forward signal.
According to embody rule demand, can select only to add reverse signal transmitting filter 111 or 113, or only add forward signal receiving filter 112 or 114, or remove both sides filter, only retain transformer unit 110.
According to embody rule demand, different input/output terminal connected modes can be selected.
A kind of embodiment of input resistant matching unit 121 as shown in Figure 4, comprise two input connecting resistances 1201,1202, input common mode electrical level 220.Input connecting resistance 1201,1202 be connected respectively to input resistant matching unit 121 entering to differential input end 211,212 and input common mode electrical level 220 between, input common mode electrical level 220 can be power supply, or other any levels.
The another kind of embodiment of input resistant matching unit 121 as shown in Figure 5, comprises input connecting resistance 1203,1204,1205.Input connecting resistance 1203,1204 is connected respectively to entering to differential input end 211,212 and entering between common mode input 213 of input resistant matching unit 121.Another input connecting resistance 1205 is connected between differential input end 212 and ground, as the build-out resistor of transmission channel 102 impedance.Input connecting resistance 1203 and input connecting resistance 1204 can reduce inside transformer inductance to reverse signal attenuation in high frequency, are suitable for the application that reverse signal frequency is higher.
The embodiment of output impedance matching unit 122 as shown in Figure 6, comprise output connecting resistance 1301,1302, output common mode level 221.What output connecting resistance 1301,1302 was connected respectively to output impedance matching unit 122 goes out between differential input end 214,215 and output common mode level 221, output common mode level 221 can be power supply, or other any levels.
The embodiment of output impedance matching unit 122 as shown in Figure 7, comprises output connecting resistance 1303, output common mode level 222.Output connecting resistance 1303 is connected to going out as difference termination impedance between differential input end 214,215 of output impedance matching unit 122, and output common mode level 222 is connected to out to common mode input 216, provides common-mode voltage.Output common mode level 222 can be power supply, or other any levels.
Reverse signal sends a kind of embodiment of low-pass filter unit 111 and forward signal reception low-pass filter unit 114 as shown in Figure 8, comprises electric capacity 2410, some resistance 1401, some switches 3401.Some groups of switches 3401 are in parallel with the unit that resistance 1401 is composed in series, be connected between input 501 and output 502, electric capacity 2410 is connected between output 502 and ground, and the low pass filter that common composition bandwidth is adjustable, the adjustment of bandwidth is realized by the break-make controlling some switches 3401.If need to reduce low-pass filtering bandwidth, then increasing parallel resistance realization by disconnecting more Multi-Switch 3401, if instead need to improve filtering bandwidth, then reducing parallel resistance by closed more Multi-Switch 3401 and realizing.By the resistance of the different impedance of switch, the bandwidth of low-pass filtering also can be adjusted.
Reverse signal sends the concrete real mode of another kind of low-pass filter unit 111 and forward signal reception low-pass filter unit 114 as shown in Figure 9, comprises electric capacity 2412, some resistance 1402, some switches 3402.The units in series that some groups of switches 3402 compose in parallel with resistance 1402, be connected between input 501 and output 502, electric capacity 2412 is connected between output 502 and ground, and the low pass filter that common composition bandwidth is adjustable, the adjustment of bandwidth is realized by the break-make controlling some switches 3402.If need to reduce low-pass filtering bandwidth, then increasing series resistance realization by disconnecting more Multi-Switch 3402, if instead need to improve filtering bandwidth, then reducing series resistance by closed more Multi-Switch 3402 and realizing.By the resistance of the different impedance of switch, the bandwidth of low-pass filtering also can be adjusted.
Forward signal receives concrete a kind of execution mode of high pass filter unit 112 and reverse signal transmission high pass filter unit 113 as shown in Figure 10, comprises electric capacity 2413, some resistance 1403, some switches 3403, some resistance 1404, some switches 3404.Some groups of switches 3403 formed unit of connecting with resistance 1403 is connected between power supply and output 506, some groups of switches 3404 formed unit of connecting with resistance 1404 is connected between output 506 and ground, electric capacity 2413 is connected between input 505 and output 506, the high pass filter that common composition bandwidth is adjustable, the adjustment of bandwidth is realized by the break-make controlling some switches 3403 and switch 3404.If need to reduce high-pass filtering bandwidth, then increasing parallel resistance realization by disconnecting more Multi-Switch 3403 and switch 3404, if instead need to improve high-pass filtering bandwidth, then reducing parallel resistance by closed more Multi-Switch 3403 and switch 3404 and realizing.Adjust the effect that parallel resistance can also reach adjustment common mode output voltage in addition.By the circuit accessible site of switch control rule resistance on circuit boards, realize Automated condtrol, technique effect is obviously strengthened.
Forward signal receives the another kind of embodiment of high pass filter unit 112 and reverse signal transmission high pass filter unit 113 as shown in Figure 11, comprises electric capacity 2414, some resistance 1405, some switches 3405, some resistance 1406, some switches 3406.Some groups of switch 3405 formed unit in parallel with resistance 1405 are connected between power supply and output 506, some groups of switch 3406 formed unit in parallel with resistance 1406 are connected between output 506 and ground, electric capacity 2414 is connected between input 505 and output 506, the high pass filter that common composition bandwidth is adjustable, the adjustment of bandwidth is realized by the break-make controlling some switches 3405 and switch 3406.If need to reduce high-pass filtering bandwidth, then increasing series resistance realization by disconnecting more Multi-Switch 3405 and switch 3406, if instead need to improve high-pass filtering bandwidth, then reducing series resistance by closed more Multi-Switch 3405 and switch 3406 and realizing.Adjust the effect that series resistance can also reach adjustment common mode output voltage in addition.
Above-mentioned reverse signal sends low-pass filter unit 111 and reverse signal transmission high pass filter unit 113 can be integrated in a chip with reverse signal dispensing device 104, adjusts filtering bandwidth by register control switch; Forward signal receives high pass filter unit 112 and forward signal reception low-pass filter unit 114 can be integrated in a chip with forward signal receiving system 105, adjusts filtering bandwidth by register control switch.
The implementation step of reverse signal transmission mixing arrangement of the present invention is: first, the reverse signal that reverse signal dispensing device sends is mixed with forward signal by signal mixer unit, and the input being sent to reverse receiving system through a transmission channel receives; Secondly, the forward signal that forward signal dispensing device sends to signal mixer unit, then outputs to forward signal receiving system by signal mixer unit through same transmission channel, receives; In addition, signal mixer unit is reverse signal in the output filtering to forward signal receiving device, ensures the reception of forward signal.This reverse signal transmission mixing arrangement is ensureing, under the condition not affecting forward signal reception, to provide the scheme realizing reverse signal transmission in a transmission channel.
The above is only preferred embodiment of the present invention; not any pro forma restriction is made to the present invention; the protection range of request of the present invention is when being as the criterion with the content described in claims; every above embodiment is done according to technical spirit of the present invention all simple change, equivalent replace or decompose merge, within the scope of request protection all still belonging to technical solution of the present invention.
Claims (17)
1. a reverse signal transmission mixing arrangement, receive the forward signal inputted by transmission channel (102), and output to forward signal receiving system (105), reverse signal transmission mixing arrangement (103) receives the reverse signal of input simultaneously, and output to transmission channel (102), transmission channel (102) transmits forward and reverse signal simultaneously, reverse signal transmission mixing arrangement (103) comprises transformer unit (110), input resistant matching unit (121) and output impedance matching unit (122), it is characterized in that:
The primary coil of described transformer unit (110) has primary coil common mode input (205) and two primary coil differential input ends (201, 202), transmission channel (102) is connected on primary coil differential input end (201), forward signal is input to primary coil differential input end (201) through transmission channel (102), reverse signal is input on primary coil common mode input (205), and output to transmission channel (102) by primary coil differential input end (201), the secondary coil of transformer unit (110) has secondary coil common mode input (206) and secondary coil difference output end (203, 204), secondary coil difference output end (203, 204) forward signal receiving system (105) is connected to as the output of forward differential signal,
Described input resistant matching unit (121) includes and enters to differential input end (211,212) to common mode input (213) and two, enter and be connected respectively on primary coil differential input end (201,202) to differential input end (211,212), enter and be connected on primary coil common mode input (205) to common mode input (213)
Described output impedance matching unit (122) comprises and goes out to differential input end (214,215) to common mode input (216) and two, go out and be connected respectively on secondary coil difference output end (203,204) to differential input end (214,215), go out and be connected on secondary coil common mode input (206) to common mode input (216).
2. reverse signal transmission mixing arrangement according to claim 1, is characterized in that: reverse signal sends low-pass filter unit (111) through reverse signal and is input on the common mode input (205) of described primary coil again.
3. reverse signal transmission mixing arrangement according to claim 1, is characterized in that: reverse signal sends high pass filter unit (113) through reverse signal and is input on described primary coil common mode input (205) again.
4. reverse signal transmission mixing arrangement according to claim 1, is characterized in that: described secondary coil difference output end (203,204) exports as forward differential signal and exports to forward signal receiving system (105) again through forward signal reception low-pass filter unit (114).
5. reverse signal transmission mixing arrangement according to claim 1, is characterized in that: described secondary coil difference output end (203,204) exports as forward differential signal and exports to forward signal receiving system (105) again through forward signal reception high pass filter unit (112).
6. the reverse signal transmission mixing arrangement according to any one in claim 1 to 5, it is characterized in that: described input resistant matching unit (121) comprises input connecting resistance (1201), input connecting resistance (1202), input common mode electrical level (220), input connecting resistance (1201) and input connecting resistance (1202) are connected respectively to entering between differential input end (211,212) and input common mode electrical level (220) of input resistant matching unit (121), and input common mode electrical level (220) can be any level.
7. the reverse signal transmission mixing arrangement according to any one in claim 1 to 5, it is characterized in that: described input resistant matching unit (121) comprises input connecting resistance (1203), input connecting resistance (1204), input connecting resistance (1205), what input connecting resistance (1203) and input connecting resistance (1204) were connected respectively to input resistant matching unit (121) enters to differential input end (211, 212) and enter between common mode input (213), input connecting resistance (1205) is connected to between differential input end (212) and ground, as the build-out resistor of transmission channel (102) impedance.
8. the reverse signal transmission mixing arrangement according to any one in claim 1 to 5, it is characterized in that: described output impedance matching unit (122) also comprises output connecting resistance (1301), output connecting resistance (1302), output common mode level (221), what output connecting resistance (1301) and output connecting resistance (1302) were connected respectively to output impedance matching unit (122) goes out to differential input end (214, 215) and between output common mode level (221), output common mode level (221) can be any level.
9. the reverse signal transmission mixing arrangement according to any one in claim 1 to 5, it is characterized in that: described output impedance matching unit (122) also comprises output connecting resistance (1303), output common mode level (222), what output connecting resistance (1303) was connected to output impedance matching unit (122) goes out to differential input end (214, 215) as difference termination impedance between, output common mode level (222) is connected to common mode input (216), common-mode voltage is provided, output common mode level (222) can be any level.
10. the reverse signal transmission mixing arrangement according to claim 2 or 4, it is characterized in that: described reverse signal sends low-pass filter unit (111) and forward signal reception low-pass filter unit (114) comprises electric capacity (2410) respectively, some resistance (1401) and some switches (3401), switch (3401) and resistance (1401) are composed in series unit, be connected between input (501) and output (502) after the unit parallel connection of some groups, electric capacity (2410) is connected between output (502) and ground, the low pass filter that common composition bandwidth is adjustable, the adjustment of bandwidth is realized by the break-make controlling some switches (3401), when needs reduce low-pass filtering bandwidth, then increase parallel resistance realization by disconnecting more Multi-Switch (3401), when needs improve filtering bandwidth, then reduce parallel resistance by closed more Multi-Switch (3401) to realize.
11. according to claim 2 or 4 reverse signal transmission mixing arrangement, it is characterized in that: described reverse signal sends low-pass filter unit (111) and forward signal reception low-pass filter unit (114) comprises electric capacity (2412) respectively, some resistance (1402), some switches (3402), the units in series that some groups of switches (3402) compose in parallel with resistance (1402), be connected between input (501) and output (502), electric capacity (2412) is connected between output (502) and ground, the low pass filter that common composition bandwidth is adjustable, the adjustment of bandwidth is realized by the break-make controlling some switches (3402), when needs reduce low-pass filtering bandwidth, then increase series resistance realization by disconnecting more Multi-Switch (3402), when needs improve filtering bandwidth, then reduce series resistance by closed more Multi-Switch (3402) to realize.
12. Signal transmissions mixing arrangements according to claim 3 or 5, it is characterized in that: described reverse signal sends high pass filter unit (113) and forward signal reception high pass filter unit (112) comprises electric capacity (2413) respectively, some resistance (1403), some switches (3403), some resistance (1404), some switches (3404), some groups of switches (3403) formed unit of connecting with resistance (1403) is connected between power supply and output (506), some groups of switches (3404) formed unit of connecting with resistance (1404) is connected between output (506) and ground, electric capacity (2413) is connected between input (505) and output (506), the high pass filter that common composition bandwidth is adjustable, the adjustment of bandwidth is realized by the break-make controlling some switches (3403) and switch (3404), when needs reduce high-pass filtering bandwidth, then increase parallel resistance realization by disconnecting more Multi-Switch (3403) and switch (3404), when needs improve high-pass filtering bandwidth, then reduce parallel resistance by closed more Multi-Switch (3403) and switch (3404) to realize, adjustment parallel resistance reaches the effect of adjustment common mode output voltage.
13. according to claim 3 or 5 reverse signal transmission mixing arrangement, it is characterized in that: described reverse signal sends high pass filter unit (113) and forward signal reception high pass filter unit (112) comprises electric capacity (2414) respectively, some resistance (1405), some switches (3405), some resistance (11406) and some switches (3406), some groups of switch (3405) formed unit in parallel with resistance (1405) are connected between power supply and output (506), some groups of switch (3406) formed unit in parallel with resistance (1406) are connected between output (506) and ground, electric capacity (2414) is connected between input (505) and output (506), the high pass filter that common composition bandwidth is adjustable, the adjustment of bandwidth is realized by the break-make controlling some switches (3405) and switch (3406), when needs reduce high-pass filtering bandwidth, then increase series resistance realization by disconnecting more Multi-Switch (3405) and switch (3406), when needs improve high-pass filtering bandwidth, then reduce series resistance by closed more Multi-Switch (3405) and switch (3406) to realize, adjustment series resistance reaches the effect of adjustment common mode output voltage.
14. according to claim 2 or 4 reverse signal transmission mixing arrangement, it is characterized in that: described reverse signal sends low-pass filter unit (111) and forward signal receives low-pass filter unit (114), use active low-pass filter to realize.
15. according to claim 3 or 5 reverse signal transmission mixing arrangement, it is characterized in that: described reverse signal sends high pass filter unit (113) and forward signal receives high pass filter unit (112), use active high-pass filter to realize.
16. according to any one in claim 1 to 5 reverse signal transmission mixing arrangement, it is characterized in that: described reverse signal sends low-pass filter unit (111) and reverse signal sends high pass filter unit (113), be integrated in a chip with reverse signal dispensing device (104) with selecting a property, adjust filtering bandwidth by register control switch.
17. according to any one in claim 1 to 5 reverse signal transmission mixing arrangement, it is characterized in that: described forward signal receive low-pass filter unit (114) and forward signal receive in high pass filter unit (112) select one and forward signal receiving system (105) be integrated in a chip, adjust filtering bandwidth by register control switch.
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| US10484044B1 (en) * | 2018-05-01 | 2019-11-19 | Huawei Technologies Co., Ltd. | Differential termination modulation for back-channel communication |
| CN117411458A (en) * | 2022-09-30 | 2024-01-16 | ***通信有限公司研究院 | Attenuator with adjustable input impedance |
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| CN101047383A (en) * | 2007-03-20 | 2007-10-03 | 湖南大学 | Current controlled full-balance differential current transmitter |
| CN101694156A (en) * | 2009-10-20 | 2010-04-14 | 电子科技大学 | Dipole acoustic small-signal processing unit |
| CN103187938A (en) * | 2011-12-27 | 2013-07-03 | 国民技术股份有限公司 | Difference simulation front end device for low-frequency signal detection and transmission system |
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| JP4856916B2 (en) * | 2005-09-12 | 2012-01-18 | オンセミコンダクター・トレーディング・リミテッド | Magnetic sensor signal detection circuit |
| CN103023445B (en) * | 2010-05-10 | 2015-09-09 | 国民技术股份有限公司 | A kind ofly to detect and the difference analogue fore device of transmission system for low frequency signal |
| CN103023584B (en) * | 2010-05-10 | 2015-08-12 | 国民技术股份有限公司 | A kind ofly to detect and the analog front-end device of transmission system for low frequency signal |
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| CN101047383A (en) * | 2007-03-20 | 2007-10-03 | 湖南大学 | Current controlled full-balance differential current transmitter |
| CN101694156A (en) * | 2009-10-20 | 2010-04-14 | 电子科技大学 | Dipole acoustic small-signal processing unit |
| CN103187938A (en) * | 2011-12-27 | 2013-07-03 | 国民技术股份有限公司 | Difference simulation front end device for low-frequency signal detection and transmission system |
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