CN202058470U - IPOD player capable of eliminating electromagnetic signal interference - Google Patents
IPOD player capable of eliminating electromagnetic signal interference Download PDFInfo
- Publication number
- CN202058470U CN202058470U CN2011201684113U CN201120168411U CN202058470U CN 202058470 U CN202058470 U CN 202058470U CN 2011201684113 U CN2011201684113 U CN 2011201684113U CN 201120168411 U CN201120168411 U CN 201120168411U CN 202058470 U CN202058470 U CN 202058470U
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- resistance
- electromagnetic signal
- electric capacity
- ipod
- power amplifier
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- Expired - Fee Related
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Abstract
The utility model relates to an IPOD player capable of eliminating electromagnetic signal interference, comprising an IPOD interface power amplifier circuit. The IPOD player capable of eliminating the electromagnetic signal interference is characterized in that a multi-level filter circuit is arranged in front of the power amplifier circuit and comprises four capacitors, four resistors and an operational amplifier integrated package ST4558. The IPOD player capable of eliminating electromagnetic signal interference can ensure that 10-22kHz audio signals can smoothly pass through, the electromagnetic signal interference is eliminated, effective signal amplification is ensured, and a real HI-FI (High Fidelity) power amplifier requirement is satisfied.
Description
[technical field]
The structure of adorning electric assembly in the utility model relates to links, and refers to a kind of IPOD player that can eliminate the electromagnetic signal interference especially.
[background technology]
At present the player of band ipod interface is more and more, but when ipod works, if having other electrical appliances for example mobile phone can be subjected to its electromagnetic interference working, send ear-piercing squeak; In the prior art,, use some wave filters usually,, useful signal has artificially been eliminated, make player can not reach the effect of high-fidelity though be improved in order to eliminate this interference.
[summary of the invention]
The purpose of this utility model is to provide a kind of can eliminate the IPOD player that electromagnetic signal is disturbed.
The technical scheme that its technical matters that solves the utility model adopts is: a kind of IPOD player that can eliminate the electromagnetic signal interference, include IPOD interface power amplifier, and it is characterized in that; Multistage filtering circuit is arranged before described power amplifier, and this multistage filtering circuit comprises 4 electric capacity, 4 resistance and an amplifier integrated package ST4558; First end is connected with IPOD interface power amplifier and is connected with an end of the 2nd resistance simultaneously after the 1st electric capacity and the 1st resistance parallel connection; One end of another termination the 2nd electric capacity of the 2nd resistance and the 2nd pin of amplifier integrated package ST4558, the 3rd pin of another termination amplifier integrated package ST4558 of the 2nd electric capacity; First end is connected with IPOD interface power amplifier and is connected with an end of the 4th resistance simultaneously after the 3rd electric capacity and the 3rd resistance parallel connection; One end of another termination the 4th electric capacity of the 4th resistance and the 6th pin of amplifier integrated package ST4558, the 5th pin of another termination amplifier integrated package ST4558 of the 4th electric capacity; Second end after the 1st electric capacity and the 1st resistance parallel connection and the 3rd electric capacity are connected with second end after the 3rd resistance parallel connection.
The beneficial effects of the utility model are: described multistage filtering circuit can make the sound signal direct motion of 10-22KHZ pass through, and eliminates electromagnetic signal and disturb, and has guaranteed that effective signal amplifies, thereby has reached real HI-FI power amplifier requirement.
[description of drawings]
The utility model will be further described below in conjunction with accompanying drawing.
Fig. 1 is the electrical schematic diagram of the utility model example;
Fig. 2 is low-pass filtering figure of the present utility model;
Fig. 3 is the figure that makes an uproar that removes of the present utility model.
[embodiment]
Referring to accompanying drawing 1, the utility model is a kind of can eliminate the IPOD player that electromagnetic signal is disturbed, and includes IPOD interface power amplifier, it is characterized in that; Multistage filtering circuit is arranged before described power amplifier, and this multistage filtering circuit comprises 4 capacitor C B201, CB200, CB205, CB204,4 resistance R 296, R295, R301, R299 and amplifier integrated package ST4558; The 1st capacitor C B201 is connected with IPOD interface power amplifier with the 1st resistance R 296 backs in parallel first end and is connected with an end of the 2nd resistance R 295 simultaneously; The end of another termination the 2nd capacitor C B200 of the 2nd resistance R 295 and the 2nd pin of integrated package 4558, the 3rd pin of another termination amplifier integrated package ST4558 of the 2nd capacitor C B200; The 3rd capacitor C B205 is connected with IPOD interface power amplifier with the 3rd resistance R 301 backs in parallel first end and is connected with an end of the 4th resistance R 299 simultaneously; The end of another termination the 4th capacitor C B204 of the 4th resistance R 299 and the 6th pin of integrated package 4558, the 5th pin of another termination amplifier integrated package ST4558 of the 4th capacitor C B204; Second end after the 1st capacitor C B201 and 296 parallel connections of the 1st resistance R and the 3rd capacitor C B205 are connected with second end after 301 parallel connections of the 3rd resistance R.
Claims (1)
1. can eliminate the IPOD player that electromagnetic signal is disturbed for one kind, include IPOD interface power amplifier, it is characterized in that; Multistage filtering circuit is arranged before described power amplifier, and this multistage filtering circuit comprises 4 electric capacity (CB201, CB200, CB205, CB204), 4 resistance (R296, R295, R301, R299) and an amplifier integrated package ST4558; The 1st electric capacity (CB201) is connected with IPOD interface power amplifier with the 1st resistance (R296) back in parallel first end and is connected with an end of the 2nd resistance (R295) simultaneously; One end of another termination the 2nd electric capacity (CB200) of the 2nd resistance (R295) and the 2nd pin of amplifier integrated package ST4558, the 3rd pin of another termination integrated package 4558 of the 2nd electric capacity (CB200); The 3rd electric capacity (CB205) is connected with IPOD interface power amplifier with the 3rd resistance (R301) back in parallel first end and is connected with an end of the 4th resistance (R299) simultaneously; One end of another termination the 4th electric capacity (CB204) of the 4th resistance (R299) and the 6th pin of amplifier integrated package ST4558, the 5th pin of another termination amplifier integrated package ST4558 of the 4th electric capacity (CB204); Second end after the 1st electric capacity (CB201) and the 1st resistance (R296) parallel connection and the 3rd electric capacity (CB205) are connected with second end after the 3rd resistance (R301) parallel connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201684113U CN202058470U (en) | 2011-05-24 | 2011-05-24 | IPOD player capable of eliminating electromagnetic signal interference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201684113U CN202058470U (en) | 2011-05-24 | 2011-05-24 | IPOD player capable of eliminating electromagnetic signal interference |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202058470U true CN202058470U (en) | 2011-11-30 |
Family
ID=45018438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201684113U Expired - Fee Related CN202058470U (en) | 2011-05-24 | 2011-05-24 | IPOD player capable of eliminating electromagnetic signal interference |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202058470U (en) |
-
2011
- 2011-05-24 CN CN2011201684113U patent/CN202058470U/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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111130 Termination date: 20120524 |