CN1897612A - Filter circuit for separating voice signal and data signal - Google Patents
Filter circuit for separating voice signal and data signal Download PDFInfo
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- CN1897612A CN1897612A CN 200510085826 CN200510085826A CN1897612A CN 1897612 A CN1897612 A CN 1897612A CN 200510085826 CN200510085826 CN 200510085826 CN 200510085826 A CN200510085826 A CN 200510085826A CN 1897612 A CN1897612 A CN 1897612A
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- 230000001681 protective effect Effects 0.000 claims description 5
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- 238000010586 diagram Methods 0.000 description 8
- 101150012579 ADSL gene Proteins 0.000 description 4
- 102100020775 Adenylosuccinate lyase Human genes 0.000 description 4
- 108700040193 Adenylosuccinate lyases Proteins 0.000 description 4
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Abstract
A filter circuit for separating a voice signal and a data signal, which is provided between an access telephone line and a subscriber terminal device, mainly comprising: the first inductor, the first capacitor, the third inductor and the fifth inductor are sequentially connected in series between the TIP end of the telephone line and the first end of the user terminal equipment; the second inductor, the second capacitor, the fourth inductor and the sixth inductor are sequentially connected in series between the RING end of the telephone line and the second end of the user terminal equipment; a seventh inductor; and four triacs connected with the seventh inductor, wherein each triac is provided with a trigger circuit consisting of two reversely connected voltage-regulator tubes and a resistor. The circuit provided by the invention can stabilize the input impedance input to the user terminal equipment, filter out the high impedance in the input impedance, separate the voice signal from the data signal in the telephone line of the telephone company, and has the advantages of simple circuit and low cost.
Description
Technical field
The present invention relates to a kind of filter circuit, relate in particular between a kind of telephone wire and subscriber terminal equipment (as telephone set) that is arranged on telephone operator, be used for the filter circuit of isolating speech signals and data-signal.
Background technology
Now a lot of telecommunications companies (or telephone operator) can adopt telephone wire that data, services (as ADSL) and voice service are provided simultaneously, for example, the user can see through ADSL signal and the voice signal that same telephone wire receives ISP (the Internet service providers), in online, can carry out voice service (as make a phone call etc.), in view of data-signal and voice signal are defeated same phone line, and the frequency of voice signal generally is between (20HZ-4KHZ), the ADSL signal is between (25KHZ-1104KHZ), for avoiding two kinds of signals the cross talk effects quality of signals occurring, therefore need a kind of filter circuit to be used for complete isolating speech signals and data-signal with a kind of interface.
Summary of the invention
The technical problem to be solved in the present invention is, provides a kind of influence that can effectively reduce the ADSL network interface, the filter circuit of separable voice signal and data-signal.
For solving above-mentioned technical problem, the technical solution adopted in the present invention is: a kind of filter circuit that is used for isolating speech signals and data-signal is provided, and it is arranged on and inserts between telephone wire and the subscriber terminal equipment, and it comprises,
First inductance, first electric capacity, the 3rd inductance and the 5th inductance that between the TIP of telephone wire end and subscriber terminal equipment first end, are connected in series successively;
Second inductance, second electric capacity, the 4th inductance and the 6th inductance that between the RING of telephone wire end and subscriber terminal equipment second end, are connected in series successively;
The 7th inductance;
Described first inductance is connected first end of first triode ac switch with the node of first electric capacity, first end of described the 7th inductance of second termination of this first triode ac switch, and between first end of the trigger end of first triode ac switch and described the 7th inductance, be serially connected with by first voltage-stabiliser tube, the circuits for triggering that second voltage-stabiliser tube and the 3rd resistance are formed, wherein, one end of triggering termination the 3rd resistance of first triode ac switch, the anode of another termination first voltage-stabiliser tube of the 3rd resistance, the negative electrode of this first voltage-stabiliser tube connects the negative electrode of second voltage-stabiliser tube, and the anode of this second voltage-stabiliser tube connects first end of the 7th inductance;
The 3rd end that is connected second triode ac switch at described second inductance with the node of second electric capacity, the 3rd end of described the 7th inductance of second termination of this second triode ac switch, and between the 3rd end of the trigger end of second triode ac switch and described the 7th inductance, be serially connected with by the 3rd voltage-stabiliser tube, the circuits for triggering that the 4th voltage-stabiliser tube and the 4th resistance are formed, wherein, one end of triggering termination the 4th resistance of second triode ac switch, the anode of another termination the 3rd voltage-stabiliser tube of the 4th resistance, the negative electrode of the 3rd voltage-stabiliser tube connects the negative electrode of the 4th voltage-stabiliser tube, and the anode of the 4th voltage-stabiliser tube connects the 3rd end of the 7th inductance;
Second end of described the 7th inductance connects first end of the 3rd triode ac switch, first end of the second termination subscriber terminal equipment of the 3rd triode ac switch, and between first end of the trigger end of the 3rd triode ac switch and subscriber terminal equipment, be serially connected with by the 5th voltage-stabiliser tube, the circuits for triggering that the 6th voltage-stabiliser tube and the 7th resistance are formed, wherein, one end of triggering termination the 7th resistance of the 3rd triode ac switch, the anode of another termination the 5th voltage-stabiliser tube of the 7th resistance, the negative electrode of the 5th voltage-stabiliser tube connects the negative electrode of the 6th voltage-stabiliser tube, and the anode of the 6th voltage-stabiliser tube connects first end of subscriber terminal equipment;
The 4th end of described the 7th inductance connects first end of the 4th triode ac switch, second end of the second termination subscriber terminal equipment of the 4th triode ac switch, and between second end of the trigger end of the 4th triode ac switch and subscriber terminal equipment, be serially connected with by the 7th voltage-stabiliser tube, the circuits for triggering that the 8th voltage-stabiliser tube and the 8th resistance are formed, wherein, one end of triggering termination the 8th resistance of the 4th triode ac switch, the anode of another termination the 7th voltage-stabiliser tube of the 8th resistance, the negative electrode of the 7th voltage-stabiliser tube connects the negative electrode of the 8th voltage-stabiliser tube, and the anode of the 8th voltage-stabiliser tube connects second end of subscriber terminal equipment;
Be parallel with first resistance at the two ends of described first inductance, be parallel with second resistance at the two ends of described second inductance, between first end of the 7th inductance and second end, be connected with the 5th resistance, between the 3rd end of the 7th inductance and the 4th end, be connected with the 6th inductance, and between the node of the node of the 3rd inductance and the 5th inductance and the 4th inductance and the 6th inductance, be connected with the 3rd electric capacity.
Wherein, between the TIP of first end of described first inductance and telephone wire end, be in series with first thermo-fuse, between the RING of first end of described second inductance and telephone wire end, be in series with second thermo-fuse, and between the node of the node of first thermo-fuse and first inductance and second thermo-fuse and second inductance, be connected with a gas discharge tube.
Wherein, between second end of second end of described the 3rd triode ac switch and the 4th triode ac switch, be connected with a protective circuit of forming by the 9th resistance, the 9th voltage-stabiliser tube and diode; second end of one termination the 3rd triode ac switch of described the 9th resistance; the anode of another termination the 9th voltage-stabiliser tube of the 9th resistance; the negative electrode of the 9th voltage-stabiliser tube connects the negative electrode of diode, and the anode of this diode connects second end of the 4th triode ac switch.
Wherein, second end of described the 4th triode ac switch connects an end of one the 5th electric capacity, and the other end of the 5th electric capacity connects the 3rd end of subscriber terminal equipment.
Wherein, described the 7th inductance is for being total to the choking coil inductance.
Wherein, described first resistance is identical with the resistance of second resistance, the 3rd resistance and the 4th resistance, the 5th resistance and the 6th resistance, the 7th resistance and the 8th resistance, and first electric capacity is identical with the capacitive reactance of second electric capacity.
Beneficial effect of the present invention is: the present invention is owing to adopted the filter circuit of common choking coil inductance, electric capacity and the controlled composition of a plurality of three terminal bidirectionals; protective circuit, thermo-fuse and gas discharge tube etc. can be equipped with and; make circuit provided by the present invention can stablize the input impedance that is input to subscriber terminal equipment; filter high impedance wherein; to separate from voice signal in the telephone wire of telephone operator and data-signal, and have the advantage that circuit is simple, cost is low.
Description of drawings
Fig. 1 is the schematic diagram of the first embodiment of the present invention;
Fig. 2 is the schematic diagram of the second embodiment of the present invention;
Fig. 3 is the schematic diagram of the third embodiment of the present invention;
Fig. 4 is the schematic diagram of the fourth embodiment of the present invention.
Embodiment
As shown in Figure 1, be the schematic diagram of first embodiment of a kind of filter circuit that is used for isolating speech signals and data-signal of the present invention.It is arranged between the telephone wire and subscriber terminal equipment (as telephone set) in the communication system, can be used to separate telephone signal and data-signal.It can carry out high impedance filtering and enter voice terminal device to suppress it to signal frequency (20HZ-4KHZ) high-frequency signal in addition that enters speech ciphering equipments such as subscriber phone, reach the purpose of voice signal and data separating.
In this embodiment, it mainly adopts a choking coil inductance and an electric capacity altogether, and cooperates a plurality of triode ac switchs to carry out filtering work, specifically, comprising:
Second inductance L 2, second capacitor C 2, the 4th inductance L 4 and the 6th inductance L 6 that between the RING of telephone wire end and subscriber terminal equipment second end (identifying with 5 among the figure), are connected in series successively;
The 7th inductance L 7, it has four ends (joint) for having the choking coil inductance altogether;
Described first inductance L 1 is connected first end of the first triode ac switch T1 with the node of first capacitor C 1, first end of described the 7th inductance L 7 of second termination of this first triode ac switch T2, and between first end of the trigger end of the first triode ac switch T1 and described the 7th inductance L 7, be serially connected with by the first voltage-stabiliser tube D1, the circuits for triggering that the second voltage-stabiliser tube D2 and the 3rd resistance R 3 are formed, wherein, one end of triggering termination the 3rd resistance R 3 of the first triode ac switch D1, the anode of another termination first voltage-stabiliser tube D1 of the 3rd resistance R 3, the negative electrode of this first voltage-stabiliser tube D1 connects the negative electrode of the second voltage-stabiliser tube D2, and the anode of this second voltage-stabiliser tube D2 connects first end of the 7th inductance L 7;
The 3rd end that is connected the second triode ac switch T2 in described second inductance L 2 with the node of second capacitor C 2, the 3rd end of described the 7th inductance L 7 of second termination of this second triode ac switch T2, and between the 3rd end of the trigger end of the second triode ac switch T2 and described the 7th inductance L 7, be serially connected with by the 3rd voltage-stabiliser tube D3, the circuits for triggering that the 4th voltage-stabiliser tube D4 and the 4th resistance R 4 are formed, wherein, one end of triggering termination the 4th resistance R 4 of the second triode ac switch T2, the anode of another termination the 3rd voltage-stabiliser tube D3 of the 4th resistance R 4, the negative electrode of the 3rd voltage-stabiliser tube D3 connects the negative electrode of the 4th voltage-stabiliser tube D4, and the anode of the 4th voltage-stabiliser tube D4 connects the 3rd end of the 7th inductance L 7;
Second end of described the 7th inductance L 7 connects first end of the 3rd triode ac switch T3, first end of the second termination subscriber terminal equipment of the 3rd triode ac switch T3 (identifying with 2 among the figure), and between first end of the trigger end of the 3rd triode ac switch T3 and subscriber terminal equipment, be serially connected with by the 5th voltage-stabiliser tube D5, the circuits for triggering that the 6th voltage-stabiliser tube D6 and the 7th resistance R 7 are formed, wherein, one end of triggering termination the 7th resistance R 7 of the 3rd triode ac switch T3, the anode of another termination the 5th voltage-stabiliser tube D5 of the 7th resistance R 7, the negative electrode of the 5th voltage-stabiliser tube D5 connects the negative electrode of the 6th voltage-stabiliser tube D6, and the anode of the 6th voltage-stabiliser tube D6 connects first end of subscriber terminal equipment;
The 4th end of described the 7th inductance L 7 connects first end of the 4th triode ac switch T4, second end of the second termination subscriber terminal equipment of the 4th triode ac switch T4 (identifying with 5 among the figure), and between second end of the trigger end of the 4th triode ac switch T4 and subscriber terminal equipment, be serially connected with by the 7th voltage-stabiliser tube D7, the circuits for triggering that the 8th voltage-stabiliser tube D8 and the 8th resistance R 8 are formed, wherein, one end of triggering termination the 8th resistance R 8 of the 4th triode ac switch T4, the anode of another termination the 7th voltage-stabiliser tube D7 of the 8th resistance R 8, the negative electrode of the 7th voltage-stabiliser tube D7 connects the negative electrode of the 8th voltage-stabiliser tube D8, and the anode of the 8th voltage-stabiliser tube D8 connects second end of subscriber terminal equipment;
Be parallel with first resistance R 1 at the two ends of described first inductance L 1, be parallel with second resistance R 2 at the two ends of described second inductance L 2, between first end of the 7th inductance L 7 and second end, be connected with the 5th resistance R 5, between the 3rd end of the 7th inductance L 7 and the 4th end, be connected with the 6th inductance R6, and between the node of the node of the 3rd inductance L 3 and the 5th inductance L 5 and the 4th inductance L 4 and the 6th inductance L 6, be connected with the 3rd capacitor C 3.
As shown in Figure 2, be the schematic diagram of the second embodiment of the present invention.Therefrom as can be seen, the difference of itself and the first embodiment maximum is, increases by one the 5th capacitor C 5 after the 4th triode ac switch T4.Promptly second end of the 4th triode ac switch T4 connects an end of the 5th capacitor C 5, and the other end of the 5th capacitor C 5 connects the 3rd end (identifying with 4 among the figure) of subscriber terminal equipment.
As shown in Figure 3, be the schematic diagram of the third embodiment of the present invention.Therefrom as can be seen, the difference of the maximum of itself and first embodiment is, has increased at least one thermo-fuse and a gas discharge tube.Between the TIP of first end of described first inductance L 1 and telephone wire end, be in series with the first thermo-fuse F1, between the RING of first end of described second inductance L 2 and telephone wire end, be in series with the second thermo-fuse F2, and between the node of the node of the first thermo-fuse F1 and first inductance L 1 and the second thermo-fuse F2 and second inductance L 2, be connected with a gas discharge tube S1.In this enforcement, also can only increase thermo-fuse F1 or only increase thermo-fuse F2.
And between second end of second end of described the 3rd triode ac switch T3 and the 4th triode ac switch T4, be connected with a protective circuit of forming by the 9th resistance R 9, the 9th voltage-stabiliser tube D9 and diode D10; second end of one termination the 3rd triode ac switch T3 of described the 9th resistance R 9; the anode of another termination the 9th voltage-stabiliser tube D9 of the 9th resistance R 9; the negative electrode of the 9th voltage-stabiliser tube D9 connects the negative electrode of diode D10, and the anode of this diode D10 connects second end of the 4th triode ac switch T4.
As shown in Figure 4, be the schematic diagram of the fourth embodiment of the present invention.Therefrom as can be seen, the difference of itself and the 3rd embodiment maximum is, increases by one the 5th capacitor C 5 after the 4th triode ac switch T4.Promptly second end of the 4th triode ac switch T4 connects an end of the 5th capacitor C 5, and the other end of the 5th capacitor C 5 connects the 3rd end (identifying with 4 among the figure) of subscriber terminal equipment.
In the above-described embodiment, described first resistance R 1 is identical with the resistance of second resistance R 2, the 3rd resistance R 3 and the 4th resistance R 4, the 5th resistance R 5 and the 6th resistance R 6, the 7th resistance R 7 and the 8th resistance R 8, and first capacitor C 1 is identical with the capacitive reactance of second capacitor C 2.And four triode ac switchs (T1, T2, T3 and T4) can be selected identical or similar elements for use.
The present invention is owing to adopted the filter circuit of common choking coil inductance, electric capacity and the controlled composition of a plurality of three terminal bidirectionals; protective circuit, thermo-fuse and gas discharge tube etc. can be equipped with and; make circuit provided by the present invention can stablize the input impedance that is input to subscriber terminal equipment; filter high impedance wherein; to separate from voice signal in the telephone wire of telephone operator and data-signal, and have the advantage that circuit is simple, cost is low.
Claims (6)
1, a kind of filter circuit that is used for isolating speech signals and data-signal, it is arranged on and inserts between telephone wire and the subscriber terminal equipment, it is characterized in that comprising:
First inductance, first electric capacity, the 3rd inductance and the 5th inductance that between the TIP of telephone wire end and subscriber terminal equipment first end, are connected in series successively;
Second inductance, second electric capacity, the 4th inductance and the 6th inductance that between the RING of telephone wire end and subscriber terminal equipment second end, are connected in series successively;
The 7th inductance;
Described first inductance is connected first end of first triode ac switch with the node of first electric capacity, first end of described the 7th inductance of second termination of this first triode ac switch, and between first end of the trigger end of first triode ac switch and described the 7th inductance, be serially connected with by first voltage-stabiliser tube, the circuits for triggering that second voltage-stabiliser tube and the 3rd resistance are formed, wherein, one end of triggering termination the 3rd resistance of first triode ac switch, the anode of another termination first voltage-stabiliser tube of the 3rd resistance, the negative electrode of this first voltage-stabiliser tube connects the negative electrode of second voltage-stabiliser tube, and the anode of this second voltage-stabiliser tube connects first end of the 7th inductance;
The 3rd end that is connected second triode ac switch at described second inductance with the node of second electric capacity, the 3rd end of described the 7th inductance of second termination of this second triode ac switch, and between the 3rd end of the trigger end of second triode ac switch and described the 7th inductance, be serially connected with by the 3rd voltage-stabiliser tube, the circuits for triggering that the 4th voltage-stabiliser tube and the 4th resistance are formed, wherein, one end of triggering termination the 4th resistance of second triode ac switch, the anode of another termination the 3rd voltage-stabiliser tube of the 4th resistance, the negative electrode of the 3rd voltage-stabiliser tube connects the negative electrode of the 4th voltage-stabiliser tube, and the anode of the 4th voltage-stabiliser tube connects the 3rd end of the 7th inductance;
Second end of described the 7th inductance connects first end of the 3rd triode ac switch, first end of the second termination subscriber terminal equipment of the 3rd triode ac switch, and between first end of the trigger end of the 3rd triode ac switch and subscriber terminal equipment, be serially connected with by the 5th voltage-stabiliser tube, the circuits for triggering that the 6th voltage-stabiliser tube and the 7th resistance are formed, wherein, one end of triggering termination the 7th resistance of the 3rd triode ac switch, the anode of another termination the 5th voltage-stabiliser tube of the 7th resistance, the negative electrode of the 5th voltage-stabiliser tube connects the negative electrode of the 6th voltage-stabiliser tube, and the anode of the 6th voltage-stabiliser tube connects first end of subscriber terminal equipment;
The 4th end of described the 7th inductance connects first end of the 4th triode ac switch, second end of the second termination subscriber terminal equipment of the 4th triode ac switch, and between second end of the trigger end of the 4th triode ac switch and subscriber terminal equipment, be serially connected with by the 7th voltage-stabiliser tube, the circuits for triggering that the 8th voltage-stabiliser tube and the 8th resistance are formed, wherein, one end of triggering termination the 8th resistance of the 4th triode ac switch, the anode of another termination the 7th voltage-stabiliser tube of the 8th resistance, the negative electrode of the 7th voltage-stabiliser tube connects the negative electrode of the 8th voltage-stabiliser tube, and the anode of the 8th voltage-stabiliser tube connects second end of subscriber terminal equipment;
Be parallel with first resistance at the two ends of described first inductance, be parallel with second resistance at the two ends of described second inductance, between first end of the 7th inductance and second end, be connected with the 5th resistance, between the 3rd end of the 7th inductance and the 4th end, be connected with the 6th inductance, and between the node of the node of the 3rd inductance and the 5th inductance and the 4th inductance and the 6th inductance, be connected with the 3rd electric capacity.
2, the filter circuit that is used for isolating speech signals and data-signal as claimed in claim 1, it is characterized in that, between the TIP of first end of described first inductance and telephone wire end, be in series with first thermo-fuse, between the RING of first end of described second inductance and telephone wire end, be in series with second thermo-fuse, and between the node of the node of first thermo-fuse and first inductance and second thermo-fuse and second inductance, be connected with a gas discharge tube.
3; the filter circuit that is used for isolating speech signals and data-signal as claimed in claim 2; it is characterized in that; between second end of second end of described the 3rd triode ac switch and the 4th triode ac switch, be connected with one by the 9th resistance; the protective circuit that the 9th voltage-stabiliser tube and diode are formed; second end of one termination the 3rd triode ac switch of described the 9th resistance; the anode of another termination the 9th voltage-stabiliser tube of the 9th resistance; the negative electrode of the 9th voltage-stabiliser tube connects the negative electrode of diode, and the anode of this diode connects second end of the 4th triode ac switch.
4, as each described filter circuit that is used for isolating speech signals and data-signal of claim 1 to 3, it is characterized in that, second end of described the 4th triode ac switch connects an end of one the 5th electric capacity, and the other end of the 5th electric capacity connects the 3rd end of subscriber terminal equipment.
5, the filter circuit that is used for isolating speech signals and data-signal as claimed in claim 4 is characterized in that, described the 7th inductance is for being total to the choking coil inductance.
6, the filter circuit that is used for isolating speech signals and data-signal as claimed in claim 5, it is characterized in that, described first resistance is identical with the resistance of second resistance, the 3rd resistance and the 4th resistance, the 5th resistance and the 6th resistance, the 7th resistance and the 8th resistance, and first electric capacity is identical with the capacitive reactance of second electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510085826 CN1897612A (en) | 2005-07-15 | 2005-07-15 | Filter circuit for separating voice signal and data signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510085826 CN1897612A (en) | 2005-07-15 | 2005-07-15 | Filter circuit for separating voice signal and data signal |
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| Publication Number | Publication Date |
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| CN1897612A true CN1897612A (en) | 2007-01-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510085826 Pending CN1897612A (en) | 2005-07-15 | 2005-07-15 | Filter circuit for separating voice signal and data signal |
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| CN (1) | CN1897612A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102148498A (en) * | 2010-02-09 | 2011-08-10 | 华为技术有限公司 | Digital subscriber line (DSL) protection circuit |
-
2005
- 2005-07-15 CN CN 200510085826 patent/CN1897612A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102148498A (en) * | 2010-02-09 | 2011-08-10 | 华为技术有限公司 | Digital subscriber line (DSL) protection circuit |
| US8625246B2 (en) | 2010-02-09 | 2014-01-07 | Huawei Technologies Co., Ltd. | DSL protection circuit |
| CN102148498B (en) * | 2010-02-09 | 2014-02-26 | 华为技术有限公司 | Digital subscriber line (DSL) protection circuit |
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