CN101155216A - Voice separating device for reducing crosstalk phenomenon - Google Patents
Voice separating device for reducing crosstalk phenomenon Download PDFInfo
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- CN101155216A CN101155216A CNA2006101401372A CN200610140137A CN101155216A CN 101155216 A CN101155216 A CN 101155216A CN A2006101401372 A CNA2006101401372 A CN A2006101401372A CN 200610140137 A CN200610140137 A CN 200610140137A CN 101155216 A CN101155216 A CN 101155216A
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Abstract
The present invention provides a voice separating device which reduces crosstalk and connects between a telephone/switch and a network server provider with electricity. The voice separating device includes a low-pass filter, a phone connecting port, a line connecting port and a high frequency impedance matching circuit. The high frequency impendence matching circuit generates impedance matching by means of inducing high frequency noise on the phone connecting port, and makes the high frequency noise flow to the high frequency impedance matching circuit, so as to make the high frequency noise induced by the line connecting port on the phone connecting port to absorb by the high frequency impedance matching circuit, thus to reduce the crosstalk occurred on the phone connecting port side.
Description
Technical field
The present invention relates to a kind of voice separating device, particularly relate to a kind of voice separating device of reducing crosstalk phenomenon.
Background technology
In recent years because the fast development of internet (Internet), especially except general E-mail conveyance service is provided, also combine multimedia services miscellaneous such as voice, picture and dynamic image.And be accompanied by these services and what come is very huge data volume, more and more can't satisfy the speed of general modem data download in the user who is to use the online of general modem (modem) and rotary telephone network.
In order to allow the user can obtain more at a high speed ability from the internet data download, (the Internet Service Provider of Internet Service Provider such as telecommunication bureau for example, be called for short ISP) the various use digital subscriber lines of release (Digital Subscriber Line, abbreviation DSL) equipment of technology, modal is exactly ADSL (Asymmetric DigitalSubscriber Line Asymmetrical Digital Subscriber Line) equipment.The frequency range that the ADSL technology allows the user upload and download data is asymmetric.Frequency range from telecommunication bureau to user's computer terminal (download) comes highly more than user's computer terminal to the frequency range of telecommunication bureau's (uploading), and the data volume that makes the user receive is like this come manyly more than its data volume of sending.
In order to allow the user also can use phone in online, a voice separating device also can be installed by telecommunication bureau when the user holds the installation dsl device.Consult Fig. 1 and Fig. 2, this voice separating device (Splitter) 81 is electrically connected between an exchange line 82 and the one phone/switch 83, and see through a dsl device 84 and be electrically connected with a user computer (figure does not show) or user's internal network (scheming not show), this exchange line 82 is the telephone wire between general phone and the telecommunication bureau's (figure does not show), and telecommunication bureau sees through phone/switch 83 that this voice separating device 81 transmits signals to the user.
This voice separating device 81 has 812 and one circuit connectivity port (LinePort) 813, a low pass filter (Low Pass Filter) 811, one phone connectivity port (Phone Port), this phone connectivity port 812 has one first end (Phone-Tip) 8121 and one second end (Phone-Ring) 8122, and this circuit connectivity port 813 also has one first end (Line-Tip) 8131 and one second end (Line-Ring) 8132.
This low pass filter 811 has a first input end 8111, one second input 8112, one first output 8113 and one second output 8114, this first input end 8111 and second input 8112 are electrically connected to first end 8131 and second end 8132 of this circuit connectivity port 813 respectively, and this circuit connectivity port 813 is electrically connected this exchange line 82.First output 8113 of this low pass filter 811 and second output 8114 are electrically connected to first end 8121 and second end 8122 of this phone connectivity port 812 respectively, and this phone connectivity port 812 also is electrically connected to this phone/switch 83.
This voice separating device 81 only draw among Fig. 2 respectively in order to the phone connectivity port that is connected with this phone/switch 83 and exchange line 82 812 and circuit connectivity port 813, and do not demonstrate the circuit of this voice separating device 81 in order to be connected with dsl device.
The signal that telecommunication bureau will deliver to the signal of user's phone end and will be sent to user's computer terminal all is to see through this exchange line 82 to transmit, and utilize low-frequency band to transmit and to deliver to the signal of user's phone end, and utilize high frequency band to transmit the signal that to deliver to user's computer terminal.After this low pass filter 811 receives these signals, these signals are carried out low-pass filtering be sent to user's phone end with the signal with low-frequency band, this voice separating device 81 also sees through this dsl device 84 with the signal of other frequency bands and delivers to user's computer terminal.Similarly, the signal that user's phone end and computer terminal will be sent to telecommunication bureau also is to utilize corresponding frequency band to be sent to telecommunication bureau respectively, and therefore, the user can surf the Net and make a phone call simultaneously, can not interfere with each other.
But because if the phone connectivity port 812 of this voice separating device 81 and circuit connectivity port 813 are when resulting in because of factors such as environmental limitations that distance is too near to each other, will respond on this phone connectivity port 812 at the high-frequency noise that this circuit connectivity port 813 produces, and make this phone connectivity port 812 also can sternly give birth to high-frequency noise.And compare with the input impedance of importing from these phone/switch 83 ends, can't effectively eliminate this high-frequency noise because the input impedance of this phone connectivity port 812 and the level of impedance match of this high-frequency noise are relatively poor, therefore the high-frequency noise in these phone connectivity port 812 sensed generations will be sent to user's phone end through this phone/switch 83, and then the user will hear the noise of interference in microphone when using phone, this is so-called cross-talk (cross-talk) phenomenon, and therefore how lowering the cross-talk phenomenon is an important problem to promote communication quality.
Summary of the invention
The objective of the invention is is providing a kind of voice separating device of reducing crosstalk phenomenon.The voice separating device of reducing crosstalk phenomenon of the present invention is to be electrically connected between one a phone/switch and the Internet Service Provider, and comprises a low pass filter, a phone connectivity port, a circuit connectivity port and a high-frequency resistance match circuit.
This phone connectivity port is electrically connected with this phone/switch, and has first end of a phone connectivity port and second end of a phone connectivity port.This circuit connectivity port is electrically connected with this Internet Service Provider, and has first end of a circuit connectivity port and second end of a circuit connectivity port.
This low pass filter has a first input end, one second input, one first output and one second output, and the first input end of this low pass filter and this second input are electrically connected to first end of this circuit connectivity port and second end of circuit connectivity port respectively, and the signal that this Internet Service Provider is transmitted is carried out low-pass filtering filtered low frequency signal is sent to this phone connectivity port.
This high-frequency resistance match circuit comprises one first inductor, one second inductor, one resistor and one first capacitor, the two ends of this first inductor are electrically connected on respectively between first end of first output of this low pass filter and this phone connectivity port, and the two ends of this second inductor are electrically connected on respectively between second end of second output of this low pass filter and this phone connectivity port, this resistor and this first capacitors in series are between second end of first end of this phone connectivity port and phone connectivity port, the resistance value of each element by suitably adjusting this high-frequency resistance match circuit, make this high-frequency resistance match circuit can with the generating high frequency noise impedance matching of induction on this phone connectivity port, make this high-frequency noise can pass through this high-frequency resistance match circuit, this circuit connectivity port induction will be absorbed by this high-frequency resistance match circuit at the high-frequency noise of this phone connectivity port end, therefore can reduce the cross-talk phenomenon that phone connectivity port end is produced.
The voice separating device of reducing crosstalk phenomenon of the present invention, this high-frequency resistance match circuit also comprise one second capacitor and one the 3rd capacitor, and this second capacitor is in parallel with this first inductor, and the 3rd capacitor is in parallel with this second inductor.
The voice separating device of reducing crosstalk phenomenon of the present invention, the voice separating device of reducing crosstalk phenomenon is by first output at this low pass filter, first end of second output and this phone connectivity port, be electrically connected this high-frequency resistance match circuit between second end, and can with the generating high frequency noise impedance matching of this circuit connectivity port induction at this phone connectivity port end, make the high-frequency noise of this sensed generation can pass through this high-frequency resistance match circuit, can't be sent to user's phone end via this phone connectivity port, therefore the cross-talk phenomenon can be effectively reduced, therefore purpose of the present invention can be reached really.
Description of drawings
Fig. 1 is a schematic diagram, illustrate one in the past voice separating device and the annexation between an exchange line, one phone/switch and a dsl device;
Fig. 2 is a circuit block diagram of this voice separating device in the past;
Fig. 3 is a schematic diagram, and the annexation between voice separating device of the present invention and Internet Service Provider, one phone/switch and a dsl device is described;
Fig. 4 is a detailed circuit diagram of voice separating device of the present invention;
Fig. 5 is a simplified electrical circuit diagram, illustrates that voice separating device of the present invention comprises the example of a plurality of high-frequency resistance match circuits.
Embodiment
The present invention is described in detail below in conjunction with drawings and Examples.
Consult Fig. 3 and Fig. 4, the preferred embodiment of the voice separating device 1 of reducing crosstalk phenomenon of the present invention is electrically connected on one phone/switch 3 and for example between the Internet Service Provider 2 such as telecommunication bureau, be applicable to and isolate the signal that this Internet Service Provider 2 will be sent to this phone/switch 3, and see through a dsl device 4 and be electrically connected with a computer (figure does not show), this voice separating device 1 is to comprise a low pass filter 11, a phone connectivity port 12, a circuit connectivity port 13 and a high-frequency resistance match circuit 14.This phone connectivity port 12 has one first end (Phone-Tip) 121 and one second end (Phone-Ring) 122, and this circuit connectivity port 13 also has one first end (Line-Tip) 131 and one second end (Line-Ring) 132.This phone connectivity port 12 there is no different with the phone connectivity port 812 of this circuit connectivity port 13 and voice separating device in the past 81 (consulting Fig. 2) with circuit connectivity port 813.Line between this voice separating device 1 and this Internet Service Provider 2 is exchange line 82 (consulting Fig. 1) in the past.
This low pass filter 11 has a first input end 111, one second input 112, one first output 113 and one second output 114.The first input end 111 of this low pass filter 11 and this second input 112 are electrically connected to first end 131 and second end 132 of this circuit connectivity port 13 respectively.
This low pass filter 11 sees through this circuit connectivity port 13 and receives the signal that this Internet Service Provider 2 transmits, and this signal is carried out low-pass filtering and isolated the low frequency signal that this Internet Service Provider 2 will be sent to this user's phone end.
It should be noted that, because this low pass filter 11 is not the improved technical characterictic of the present invention, and by being known, and there are many embodiment to reach to isolate the function of the low-frequency band signal that will be sent to user's phone, therefore do not repeat them here at this field those of ordinary skill.
This high-frequency resistance match circuit 14 is electrically connected between this low pass filter 11 and this phone connectivity port 12, and has one first inductor 141, one second inductor 142, a resistor 146, one first capacitor 143, one second capacitor 144 and one the 3rd capacitor 145.
One end of this resistor 146 is electrically connected with first end 121 of this phone connectivity port 12, and the other end is electrically connected with an end of this first capacitor 143, and the other end of this first capacitor 143 is electrically connected with second end 122 of this phone connectivity port 12.The two ends of this first inductor 141 are electrically connected with first end 121 of this phone connectivity port 12 and first output 113 of this low pass filter 11 respectively, and the two ends of this second inductor 142 then are electrically connected on second end 122 of this phone connectivity port 12 and second output 114 of this low pass filter 11 respectively.The two ends of this second capacitor 144 are electrically connected with the two ends of this second inductor 142 respectively, and the two ends of the 3rd capacitor 145 are electrically connected with the two ends of this first inductor 141 respectively.
The position of this resistor 146 and this first capacitor 143 also can exchange, make an end of this resistor 146 be electrically connected second end 122 of this phone connectivity port 12, and the other end is electrically connected with an end of this first capacitor 143, and the other end of this first capacitor 143 is electrically connected with first end 121 of this phone connectivity port 12.
By first end 121 in this phone connectivity port 12, first output 113 of second end 122 and this low pass filter 11, be electrically connected this high-frequency resistance match circuit 14 between second output 114, and suitably adjust these first inductors 141, second inductor 142, this first capacitor 143, second capacitor 144, the resistance value of elements such as the 3rd capacitor 145 and this resistor 146, make these high-frequency resistance match circuit 14 integral body can be effectively and the generating high frequency noise impedance matching of these circuit connectivity port 13 inductions in this phone connectivity port 12, and make this high-frequency noise pass by the direction of this high-frequency resistance match circuit 14 and then past low pass filter 11, therefore when this circuit connectivity port 13 cause because of factors such as environmental limitations and this phone connectivity port 12 between distance too near, and make the high-frequency noise induction that is produced in this circuit connectivity port 13 on this phone connectivity port 12, when making these phone connectivity port 12 ends also produce high-frequency noise, the high-frequency noise of this sensed generation can produce impedance matching with this high-frequency resistance match circuit 14 effectively, and pass toward the direction of this high-frequency resistance match circuit 14, can't be sent to user's phone end via this phone connectivity port 12, therefore respond to the high-frequency noise that produces in this phone connectivity port 12 and will be able to be mated effectively and offset, and then can improve the cross-talk phenomenon that user's phone end is produced.
Consult Fig. 5, the voice separating device 1 of reducing crosstalk phenomenon of the present invention also can comprise a plurality of high-frequency resistance match circuits 14, and these high-frequency resistance match circuits 14 are to be connected electrically between this low pass filter 11 and this phone connectivity port 12 with the series connection form.Shown in Figure 5 promptly is the embodiment that voice separating device 1 of the present invention comprises plural high-frequency resistance match circuit 14.
In addition, not only can the arrange in pairs or groups modulator-demodulator of ADSL in the past of the voice separating device 1 of reducing crosstalk phenomenon of the present invention uses, also can arranging in pairs or groups, other utilize Digital Subscriber Line road technique (Digital Subscriber Line, abbreviation DSL) modulator-demodulator, integrated digital subscriber's line (Integrated Digital Subscriber Line for example, be called for short IDSL), HDSL High-Speed Digital Subscriber Line (High-bit-rate Digital SubscriberLine, be called for short HDSL), to line digital subscriber line (Single-pair DigitalSubscriber Line, be called for short SDSL) or Very High Speed Digital Subscriber Line (Veryhigh Data rate Subscriber Line is called for short VDSL).
Comprehensively above-mentioned, the voice separating device 1 of reducing crosstalk phenomenon of the present invention is by first output 113 at this low pass filter 11, first end 121 of second output 114 and this phone connectivity port 12, be electrically connected this high-frequency resistance match circuit 14 between second end 122, and can with the generating high frequency noise impedance matching of this circuit connectivity port 13 inductions at these phone connectivity port 12 ends, make the high-frequency noise of this sensed generation can pass through this high-frequency resistance match circuit 14, can't be sent to user's phone end via this phone connectivity port 12, therefore the cross-talk phenomenon can be effectively reduced, therefore purpose of the present invention can be reached really.
Claims (2)
1. the voice separating device of a reducing crosstalk phenomenon, be electrically connected between a phone/switch and the Internet Service Provider, this voice separating device comprises a phone connectivity port, a circuit connectivity port and a low pass filter, this phone connectivity port is electrically connected with this phone/switch, and have first end of a phone connectivity port and second end of a phone connectivity port, this circuit connectivity port is electrically connected with this Internet Service Provider, and have first end of a circuit connectivity port and second end of a circuit connectivity port, this low pass filter has a first input end, one second input, one first output and one second output, and the first input end of this low pass filter and second input are electrically connected to first end of this circuit connectivity port and second end of circuit connectivity port respectively, and the signal that this Internet Service Provider is transmitted is carried out low-pass filtering, it is characterized in that
The voice separating device of this reducing crosstalk phenomenon also comprises a high-frequency resistance match circuit, this high-frequency resistance match circuit comprises one first inductor, one second inductor, a resistor and one first capacitor, the two ends of this first inductor are electrically connected on respectively between first end of first output of this low pass filter and this phone connectivity port, and the two ends of this second inductor are electrically connected on respectively between second end of second output of this low pass filter and this phone connectivity port, and this resistor and this first capacitors in series are between second end of first end of this phone connectivity port and phone connectivity port.
2. the voice separating device of reducing crosstalk phenomenon according to claim 1, it is characterized in that, this high-frequency resistance match circuit also comprises one second capacitor and one the 3rd capacitor, this second capacitor is in parallel with this first inductor, and the 3rd capacitor is in parallel with this second inductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101401372A CN101155216A (en) | 2006-09-30 | 2006-09-30 | Voice separating device for reducing crosstalk phenomenon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101401372A CN101155216A (en) | 2006-09-30 | 2006-09-30 | Voice separating device for reducing crosstalk phenomenon |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101155216A true CN101155216A (en) | 2008-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006101401372A Pending CN101155216A (en) | 2006-09-30 | 2006-09-30 | Voice separating device for reducing crosstalk phenomenon |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101155216A (en) |
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2006
- 2006-09-30 CN CNA2006101401372A patent/CN101155216A/en active Pending
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Open date: 20080402 |