CN205544914U - Low -cost filter circuit - Google Patents
Low -cost filter circuit Download PDFInfo
- Publication number
- CN205544914U CN205544914U CN201521109233.1U CN201521109233U CN205544914U CN 205544914 U CN205544914 U CN 205544914U CN 201521109233 U CN201521109233 U CN 201521109233U CN 205544914 U CN205544914 U CN 205544914U
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- China
- Prior art keywords
- branch road
- resistance
- lead
- connects
- road
- Prior art date
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- Expired - Fee Related
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Abstract
The utility model discloses a low -cost filter circuit, including transformer, an output terminal and the 2nd output terminal, transformer secondary coil's end connecting terminal of the same name connects an output terminal through the first branch road that is equipped with the diode, secondary coil's synonym end connecting terminal connects the 2nd output terminal through the second branch road that is equipped with first resistance, it has third branch road, fourth branch road, the 5th branch road to connect in parallel in proper order between first branch road, second branch road, the third props up and is equipped with first electric capacity on the road, the fourth props up and is equipped with second resistance and third resistance on the road, the 5th is equipped with second electric capacity on the road, the ground point is still connected through the 6th branch road to the second branch road, the tie point of the 6th branch road and second branch road lies in between first resistance and the 2nd output terminal. The utility model discloses low -cost filter circuit, it can be detached the AC component among the rectification output voltage, lets the direct current pass through, restricts the ripple of exporting at certain within range.
Description
Technical field
This utility model relates to low cost filter circuit.
Background technology
Filter circuit is usually used in filtering off the ripple in rectifier output voltage.
Utility model content
The purpose of this utility model is to provide a kind of low cost filter circuit, and the alternating component in rectifier output voltage can be removed by it, allows direct current pass through, is limited in certain scope by the ripple of output.
For achieving the above object, the technical solution of the utility model is a kind of low cost filter circuit of design, including transformator, the first lead-out terminal and the second lead-out terminal；
Described transformator includes primary coil and secondary coil；
Described primary coil is used for accessing signal source；
The Same Name of Ends of described secondary coil connects terminal and connects the first lead-out terminal by the first branch road；Described first branch road is provided with diode, and the positive pole of this diode is connected terminal and connects with the Same Name of Ends of secondary coil；
The different name end of described secondary coil connects terminal and connects the second lead-out terminal by the second branch road；Described second branch road is provided with the first resistance；
The 3rd branch road, the 4th branch road, the 5th branch road it is parallel with successively between described first branch road, the second branch road；
The junction point of described 3rd branch road, the 4th branch road, the 5th branch road and the first branch road is between diode cathode and the first lead-out terminal；
The junction point of described 3rd branch road, the 4th branch road and the second branch road is between the different name end and the first resistance of secondary coil；
The junction point of described 5th branch road and the second branch road is between the first resistance and the second lead-out terminal；
Described 3rd branch road is provided with the first electric capacity, and this first electric capacity is electrochemical capacitor, and the positive pole of electrochemical capacitor is connected with diode cathode；
Described 4th branch road is provided with the second resistance and the 3rd resistance；
Described 5th branch road is provided with the second electric capacity；
Described second branch road connects earth point also by the 6th branch road；The junction point of described 6th branch road and the second branch road is between the first resistance and the second lead-out terminal.
Preferably, the two ends of described first diode are also parallel with the 3rd electric capacity.
Advantage of the present utility model and having the beneficial effects that: provide a kind of low cost filter circuit, the alternating component in rectifier output voltage can be removed by it, allows direct current pass through, is limited in certain scope by the ripple of output.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present utility model.
Detailed description of the invention
Below in conjunction with the accompanying drawings and embodiment, detailed description of the invention of the present utility model is further described.Following example are only used for clearly illustrating the technical solution of the utility model, and can not limit protection domain of the present utility model with this.
The technical scheme that this utility model is embodied as is:
As it is shown in figure 1, a kind of low cost filter circuit, including transformator T1, the first lead-out terminal OUT+ and the second lead-out terminal OUT-；
Described transformator T1 includes primary coil L1 and secondary coil L2；
Described primary coil L1 is used for accessing signal source；
The Same Name of Ends of described secondary coil L2 connects terminal and connects the first lead-out terminal OUT+ by the first branch road；Described first branch road is provided with diode D1, and the positive pole of this diode D1 is connected terminal and connects with the Same Name of Ends of secondary coil L2；
The different name end of described secondary coil L2 connects terminal and connects the second lead-out terminal OUT-by the second branch road；Described second branch road is provided with the first resistance R5；
The 3rd branch road, the 4th branch road, the 5th branch road it is parallel with successively between described first branch road, the second branch road；
The junction point of described 3rd branch road, the 4th branch road, the 5th branch road and the first branch road is between diode D1 negative pole and the first lead-out terminal OUT+；
The junction point of described 3rd branch road, the 4th branch road and the second branch road is between the different name end and the first resistance R5 of secondary coil L2；
The junction point of described 5th branch road and the second branch road is between the first resistance R5 and the second lead-out terminal OUT-；
Described 3rd branch road is provided with the first electric capacity E2, and this first electric capacity E2 is electrochemical capacitor, and the positive pole of electrochemical capacitor is connected with diode D1 negative pole；
Described 4th branch road is provided with the second resistance R3 and the 3rd resistance R7；
Described 5th branch road is provided with the second electric capacity C4；
Described second branch road connects earth point also by the 6th branch road；The junction point of described 6th branch road and the second branch road is between the first resistance R5 and the second lead-out terminal OUT-.
The two ends of described first diode D1 are also parallel with the 3rd electric capacity C8.
The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; on the premise of without departing from this utility model know-why; can also make some improvements and modifications, these improvements and modifications also should be regarded as protection domain of the present utility model.
Claims (2)
1. low cost filter circuit, it is characterised in that include transformator, the first lead-out terminal and the second lead-out terminal；
Described transformator includes primary coil and secondary coil；
The Same Name of Ends of described secondary coil connects terminal and connects the first lead-out terminal by the first branch road；Described first branch road is provided with diode, and the positive pole of this diode is connected terminal and connects with the Same Name of Ends of secondary coil；
The different name end of described secondary coil connects terminal and connects the second lead-out terminal by the second branch road；Described second branch road is provided with the first resistance；
The 3rd branch road, the 4th branch road, the 5th branch road it is parallel with successively between described first branch road, the second branch road；
The junction point of described 3rd branch road, the 4th branch road, the 5th branch road and the first branch road is between diode cathode and the first lead-out terminal；
The junction point of described 3rd branch road, the 4th branch road and the second branch road is between the different name end and the first resistance of secondary coil；
The junction point of described 5th branch road and the second branch road is between the first resistance and the second lead-out terminal；
Described 3rd branch road is provided with the first electric capacity, and this first electric capacity is electrochemical capacitor, and the positive pole of electrochemical capacitor is connected with diode cathode；
Described 4th branch road is provided with the second resistance and the 3rd resistance；
Described 5th branch road is provided with the second electric capacity；
Described second branch road connects earth point also by the 6th branch road；The junction point of described 6th branch road and the second branch road is between the first resistance and the second lead-out terminal.
Low cost filter circuit the most according to claim 1, it is characterised in that the two ends of described diode are also parallel with the 3rd electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521109233.1U CN205544914U (en) | 2015-12-29 | 2015-12-29 | Low -cost filter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521109233.1U CN205544914U (en) | 2015-12-29 | 2015-12-29 | Low -cost filter circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205544914U true CN205544914U (en) | 2016-08-31 |
Family
ID=56762040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521109233.1U Expired - Fee Related CN205544914U (en) | 2015-12-29 | 2015-12-29 | Low -cost filter circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205544914U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109891731A (en) * | 2016-10-26 | 2019-06-14 | 三菱电机株式会社 | Power conversion device |
-
2015
- 2015-12-29 CN CN201521109233.1U patent/CN205544914U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109891731A (en) * | 2016-10-26 | 2019-06-14 | 三菱电机株式会社 | Power conversion device |
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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: 20160831 Termination date: 20191229 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |