CN2211142Y - Anti-interference telephone rosette - Google Patents
Anti-interference telephone rosette Download PDFInfo
- Publication number
- CN2211142Y CN2211142Y CN 94236784 CN94236784U CN2211142Y CN 2211142 Y CN2211142 Y CN 2211142Y CN 94236784 CN94236784 CN 94236784 CN 94236784 U CN94236784 U CN 94236784U CN 2211142 Y CN2211142 Y CN 2211142Y
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- interference
- box body
- utility
- model
- circuit
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- Expired - Fee Related
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- 239000003990 capacitor Substances 0.000 claims abstract description 14
- 230000000694 effects Effects 0.000 claims abstract description 9
- 229910000859 α-Fe Inorganic materials 0.000 claims description 8
- 239000000696 magnetic material Substances 0.000 claims description 5
- 238000001914 filtration Methods 0.000 abstract description 7
- 230000002265 prevention Effects 0.000 abstract 1
- 238000004804 winding Methods 0.000 description 6
- 230000004907 flux Effects 0.000 description 4
- 238000003491 array Methods 0.000 description 3
- 239000011324 bead Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000010892 electric spark Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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Abstract
The utility model relates to an anti-interference telephone junction box, which can filter high-frequency interference and peak interference. The utility model is composed of a box body and circuits installed in the box body, wherein, a passive filter circuit is installed in the box body; the passive filter circuit comprises two sets of coils wound on the same magnetic path; capacitors connected in parallel are arranged between the two sets of coils at one end; capacitors connected in parallel are also arranged between the two sets of coils at the other end. The utility model using a passive filtering device does not generate any additional signal, and has the advantages of low cost, and obvious effects of noise reduction and interference prevention. The utility model can be produced and sold as an independent product. The passive filtering device can also be installed in a telephone to be used, and the anti-interference effects are same.
Description
The utility model relates to a kind of phone terminal box, it be particularly related to a kind of can the filtering High-frequency Interference and the jamproof telephone connection box that disturbs of spike.
Before the utility model proposes, general telephone connection box is the jockey between a simple circuit and the telephone set, and portion is securing member and the electric conducting material that connects usefulness within it, does not have the anti-interference effect of any filtering.Yet, find in actual use, because High-frequency Interference that launch in industrial equipment, household electrical appliance, radio station and the normal use that influences telephone set from the spike serious interference of electric spark, high-frequency high-power Switching Power Supply, the lighter is with radio station broadcast and other back drop, and weight person can't use telephone set.
The purpose of this utility model be to provide a kind of can the filtering industrial equipment, the High-frequency Interference of household electrical appliance, radio station emission and the phone that disturbs from the spike of electric spark, high-frequency high-power Switching Power Supply be with anti-interference terminal box (filter circuit in the terminal box also is installed in the telephone set, and its anti-interference effect is identical).
The purpose of this utility model can realize by following technical measures.
This anti-interference telephone connection box, it comprises by the circuit of installing in box body and the box body and forming, and passive filter circuit is installed in box body.Passive filter circuit is two groups of coils on the same magnetic circuit, is parallel with electric capacity between an end of two groups of coils, is parallel with electric capacity between the other end of two groups of coils.
Described two groups of coils on same magnetic circuit are that the number of turn is identical, arrange symmetry, the inductance coil that inductance equates.The electric capacity at two inductance coil two ends can also be respectively to be formed by two capacitances in series, and the tie point of two electric capacity can also ground connection.Aforesaid magnetic circuit is made of high frequency magnetic materials such as ferrites.
In actual use, described passive filter circuit can also be installed in the telephone set, and anti-interference effect is identical.
Operation principle of the present utility model is: telephone wire is the circuit of balance transmission, and oversize because of cabling, and the branch's electric capacity between two lines is bigger, so the differential mode HF noise signal of Xing Chenging is very little on the line, and mainly is based on the common-mode noise interference.In this circuit, two inductance coils are on same magnetic circuit, and its number of turn is equal fully, arrange symmetry, and inductance equates that the magnetic flux that produces when they pass to same current equates in magnetic core.When useful signal passed through, because opposite by the electric current equal direction of two inductance, the magnetic flux of two winding generations was cancelled each other, influence very for a short time, and magnetic flux again can be unsaturated, in this case, two inductance are equivalent to noninductive resistance, and its resistance is equivalent to the D.C. resistance of copper cash.To common mode disturbances, the magnetic flux mutual superposition that inductance produces, the induction reactance of inductance is very big, and interference signal can not be passed through, and adds electric capacity high-frequency signal is equivalent to the short circuit effect, so the jamproof effect of this circuit is fine.The utility model is because the symmetry on the circuit, be regardless of into end with go out end, have identical result of use.
The utility model is compared with prior art has following advantage.
1. it is equipped with the passive filtering device on the basis of original terminal box, does not produce any additional signal.
2. change easy for installation, simple, can be forever, the reliable use.
3. cost is low, and the anti-interference effect of noise reduction is obvious, can be used as stand-alone product and produces and sells.
4. bidirectional filtering, the filtered band wide ranges is widely used.
Description of drawings of the present utility model.
Fig. 1. the structure chart of terminal box of the present utility model.
Fig. 2. the circuit diagram of an embodiment of the utility model passive filter.
Fig. 3. inductance coil coiling figure in the utility model.
Fig. 4. the circuit diagram of the utility model passive filter.
Embodiment of the present utility model.
Embodiment one.Referring to Figure of description 1, Fig. 3, Fig. 4.This anti-interference telephone connection box, it comprises by the circuit of installing in box body and the box body and forming, and passive filter circuit (2) is installed in box body (1); Lid (3) is arranged on box body (1), on box body (1) wall, have into and out of line hole (4).Passive filter circuit is to be parallel with capacitor C 1 between the end of two groups of coil L1, L2 on the same magnetic circuit, is parallel with capacitor C 2 between the other end of L1 and L2.
Above-mentioned two groups of coil L1 and L2 on same magnetic circuit is that the number of turn is identical, arranges symmetry, the inductance coil that inductance equates.Magnetic circuit is made of high frequency magnetic materials such as ferrites, is annular ferrite bead here, and two coil-winding directions are identical, and symmetric arrays is on the both sides of magnet ring.Inductance L 1=L2=40mH wherein, capacitor C 1=C2=0.01u/160V.
Embodiment two.Referring to Figure of description 1 and Fig. 2.
This anti-interference telephone connection box, it comprises by the circuit of installing in box body and the box body and forming, and passive filter circuit (2) is installed in box body (1); Lid (2) is arranged on box body (1), on box body (1) wall, have into and out of line hole (4) at box body.Passive filter circuit is that two groups of coil L1, L2(winding on the same magnetic circuit are with the winding of inductance among Fig. 3) an end between be parallel with the capacitor C 3 and the C4 of series connection, be parallel with the capacitor C 5 and the C6 of series connection between the other end of L1 and L2.
Above-mentioned two groups of coil L1 and L2 on same magnetic circuit is that the number of turn is identical, arranges symmetry, the inductance coil that inductance equates.Magnetic circuit is made of high frequency magnetic materials such as ferrites, is annular ferrite bead here, and two coil-winding directions are identical, and symmetric arrays is on the both sides of magnet ring.L1=L2=40mH wherein, C3=C4=C5=C6=0.02u/160V.
Embodiment three.Referring to Fig. 2.Passive filter is installed in the telephone set.Passive filter circuit is to be parallel with capacitor C 1 between the end of two groups of coil L1, L2 on the same magnetic circuit, is parallel with capacitor C 2 between the other end of L1 and L2.
Above-mentioned two groups of coil L1 and L2 on same magnetic circuit is that the number of turn is identical, arranges symmetry, the inductance coil that inductance equates.Magnetic circuit is made of high frequency magnetic materials such as ferrites, is annular ferrite bead here, and two coil-winding directions are identical, and symmetric arrays is on the both sides of magnet ring.L1=L2=40mH wherein, C1=C2=0.01u/160V.
Claims (5)
1, a kind of anti-interference telephone connection box, it comprises by the circuit of installing in box body and the box body and forming, it is characterized in that:
A., passive filter circuit (2) is installed in box body (1);
B. passive filter circuit is to be parallel with capacitor C 1 between the end of two groups of coil L1, L2 on the same magnetic circuit, is parallel with capacitor C 2 between the other end of L1 and L2.
2, a kind of anti-interference telephone connection box according to claim 1 is characterized in that wherein said two groups of coil L1 and L2 on same magnetic circuit is that the number of turn is identical, arranges symmetry, the inductance coil that inductance equates.
3, a kind of anti-interference telephone connection box according to claim 1 is characterized in that wherein said capacitor C 1 and C2 are in series by capacitor C 3 and C4 and C5, C6, and the tie point of capacitor C 3 and C4, C5 and C6 can also ground connection.
4, a kind of anti-interference telephone connection box according to claim 1 is characterized in that wherein said magnetic circuit is made of high frequency magnetic materials such as ferrites.
5, a kind of anti-interference telephone connection box according to claim 1 is characterized in that wherein said passive filter circuit can also be installed in the telephone set, and effect is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94236784 CN2211142Y (en) | 1994-07-05 | 1994-07-05 | Anti-interference telephone rosette |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94236784 CN2211142Y (en) | 1994-07-05 | 1994-07-05 | Anti-interference telephone rosette |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2211142Y true CN2211142Y (en) | 1995-10-25 |
Family
ID=33844667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94236784 Expired - Fee Related CN2211142Y (en) | 1994-07-05 | 1994-07-05 | Anti-interference telephone rosette |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2211142Y (en) |
-
1994
- 1994-07-05 CN CN 94236784 patent/CN2211142Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |