CN203233498U - Distributor circuit with input terminal having filtering capacity - Google Patents
Distributor circuit with input terminal having filtering capacity Download PDFInfo
- Publication number
- CN203233498U CN203233498U CN 201320298376 CN201320298376U CN203233498U CN 203233498 U CN203233498 U CN 203233498U CN 201320298376 CN201320298376 CN 201320298376 CN 201320298376 U CN201320298376 U CN 201320298376U CN 203233498 U CN203233498 U CN 203233498U
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- Prior art keywords
- inductance
- filter
- electric capacity
- input
- capacitor
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Abstract
Disclosed in the utility model is a distributor circuit with an input terminal having a filtering capacity. The distributor circuit is composed of a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first inductor, a second inductor, a filter inductor and a resistor. The provided distributor circuit has the following characteristics: the filter inductor is used to filter a low-frequency signal without influencing a high-frequency signal; and because the low-frequency signal in a non-television signal is filtered, the television image can be ensured not to be influenced by clutters.
Description
Technical field
The utility model includes the cable TV system equipment technical field, and particularly a kind of input has the allotter circuit of filter capacity.
Background technology
Connect inductance between the input of the allotter circuit of prior art, the benefit of this design is simple in structure, but shortcoming is to lack filter function, cause the low frequency signal of non-TV signal also to be reached output, influence the result of broadcast of TV, if input increases the filtering facility, filter the low frequency signal of non-TV signal, just can address this problem.
The utility model content
(1) technical problem that will solve
The purpose of this utility model will overcome above-mentioned shortcoming exactly, aims to provide the allotter circuit that a kind of input has filter capacity.
(2) technical scheme
For achieving the above object, input of the present utility model has the allotter circuit of filter capacity, by first electric capacity, second electric capacity, the 3rd electric capacity, the 4th electric capacity, first inductance, second inductance, filter inductance and resistance are formed, described first electric capacity, one end is as input, the other end connects described first inductance, one end, the described first inductance other end ground connection, be connected in the middle of described first inductance with in the middle of described second inductance, and described the 4th electric capacity of connecting between its junction and the ground wire, described second electric capacity, one end is as first output, the other end connects described second inductance, one end, described the 3rd electric capacity one end is as second output, the other end connects the other end of described second inductance, and described filter inductance is connected between input and the ground wire, and described resistance is in parallel with described second inductance.
Further, described second electric capacity is identical with the capacitance of described the 3rd electric capacity.
(3) beneficial effect
Compared with prior art, the technical solution of the utility model has the following advantages: overcome the defective that input in the prior art lacks filter capacity, guaranteed that television image is not influenced by clutter.
Description of drawings
Fig. 1 has the circuit theory schematic diagram of the allotter circuit of filter capacity for the utility model input.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.Following examples are used for explanation the utility model, but are not used for limiting scope of the present utility model.
As shown in Figure 1, input of the present utility model has the allotter circuit of filter capacity, by first capacitor C 1, second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4, first inductance L 1, second inductance L 2, filter inductance T and resistance R are formed, described first capacitor C, 1 one ends are as input, the other end connects described first inductance L, 1 one ends, described first inductance L, 1 other end ground connection, be connected in the middle of described first inductance L 1 with in the middle of described second inductance L 2, and described the 4th capacitor C 4 of connecting between its junction and the ground wire, described second capacitor C, 2 one ends are as first output, the other end connects described second inductance L, 2 one ends, described the 3rd capacitor C 3 one ends are as second output, the other end connects the other end of described second inductance L 2, described filter inductance T is connected between input and the ground wire, and described resistance R is in parallel with described second inductance L 2.
Described second capacitor C 2 is identical with the capacitance of described the 3rd capacitor C 3, guarantees that output has identical filter capacity, and the signal frequency of output is consistent.
Input of the present utility model has the allotter circuit of filter capacity, overcome the defective that input in the prior art lacks filter capacity, utilize filter inductance low frequency signal can be filtered out, and the impregnable characteristics of high-frequency signal, filter out the low frequency signal of non-TV signal, guarantee that television image is not influenced by clutter.
In sum, above-mentioned execution mode is not to be restricted execution mode of the present utility model, and the modification that all those skilled in the art carry out on the basis of flesh and blood of the present utility model or equivalent deformation are all at technology category of the present utility model.
Claims (2)
1. allotter circuit that input has filter capacity, it is characterized in that: by first electric capacity, second electric capacity, the 3rd electric capacity, the 4th electric capacity, first inductance, second inductance, filter inductance and resistance are formed, described first electric capacity, one end is as input, the other end connects described first inductance, one end, the described first inductance other end ground connection, be connected in the middle of described first inductance with in the middle of described second inductance, and described the 4th electric capacity of connecting between its junction and the ground wire, described second electric capacity, one end is as first output, the other end connects described second inductance, one end, described the 3rd electric capacity one end is as second output, the other end connects the other end of described second inductance, described filter inductance is connected between input and the ground wire, and described resistance is in parallel with described second inductance.
2. input as claimed in claim 1 has the allotter circuit of filter capacity, it is characterized in that: described second electric capacity is identical with the capacitance of described the 3rd electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320298376 CN203233498U (en) | 2013-05-28 | 2013-05-28 | Distributor circuit with input terminal having filtering capacity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320298376 CN203233498U (en) | 2013-05-28 | 2013-05-28 | Distributor circuit with input terminal having filtering capacity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203233498U true CN203233498U (en) | 2013-10-09 |
Family
ID=49289599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320298376 Expired - Fee Related CN203233498U (en) | 2013-05-28 | 2013-05-28 | Distributor circuit with input terminal having filtering capacity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203233498U (en) |
-
2013
- 2013-05-28 CN CN 201320298376 patent/CN203233498U/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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131009 Termination date: 20200528 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |