CN201947424U - Novel wireless headset for teaching foreign languages - Google Patents
Novel wireless headset for teaching foreign languages Download PDFInfo
- Publication number
- CN201947424U CN201947424U CN2011200456232U CN201120045623U CN201947424U CN 201947424 U CN201947424 U CN 201947424U CN 2011200456232 U CN2011200456232 U CN 2011200456232U CN 201120045623 U CN201120045623 U CN 201120045623U CN 201947424 U CN201947424 U CN 201947424U
- Authority
- CN
- China
- Prior art keywords
- filter circuit
- circuit
- wireless headset
- audio
- active filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Circuit For Audible Band Transducer (AREA)
Abstract
The utility model discloses a novel wireless headset for teaching foreign languages, which comprises a power supply, a magnetic receiving antenna, an audio pre-amplification circuit, a passive filter circuit, an active filter circuit, an audio power amplification circuit and a loudspeaker, wherein an output end of the audio pre-amplification circuit is connected with an input end of the passive filter circuit; the output end of the passive filter circuit is connected with the input end of the active filter circuit; and the output end of the active filter circuit is connected with the audio power amplification circuit and the loudspeaker. The novel wireless headset has the advantages of reasonable structure and design, sensitive response, high harmonic filter rate, large capacity and high operation stability, and is more suitable for teaching the foreign languages.
Description
Technical field
The utility model relates to device therefor field in the foreign language teaching, especially a kind of novel foreign language teaching wireless headset.
Background technology
At present, a large amount of hearing wireless headsets that use in foreign language teaching, because the magnetic reception antenna is subjected to the interference of mixed and disorderly unwanted signal on every side, reception is relatively poor.
The utility model content
The utility model technical assignment is at above-mentioned technical deficiency, and a kind of novel foreign language teaching wireless headset is provided.
The technical scheme that the utility model technical solution problem is adopted is: novel foreign language teaching wireless headset, comprise power supply, magnetic reception antenna, audio frequency pre-amplification circuit, passive filter circuit, active filter circuit, audio power amplifying circuit and loud speaker, the output of this audio frequency pre-amplification circuit links to each other with the input of passive filter circuit, the output of passive filter circuit links to each other with the input of active filter circuit, and the output of active filter circuit then is connected with audio power amplifying circuit and loud speaker.
The beneficial effect that the utility model can bring is:
1, the comprehensive use of passive filter circuit and active filter circuit, make the utility model have that capacity is big, operation stability is high concurrently and be quick on the draw, characteristics that the harmonic filtration rate is high.
Description of drawings
Fig. 1, the utility model overall structure schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the utility model is done following detailed description:
As shown in Figure 1, the novel foreign language teaching wireless headset that the utility model is announced, comprise power supply, magnetic reception antenna, audio frequency pre-amplification circuit, passive filter circuit, active filter circuit, audio power amplifying circuit and loud speaker, the output of this audio frequency pre-amplification circuit links to each other with the input of passive filter circuit, the output of passive filter circuit links to each other with the input of active filter circuit, and the output of active filter circuit then is connected with audio power amplifying circuit and loud speaker.
During concrete the use, the field signal that changes around described magnetic reception antenna receives produces the correspondent voltage signal and amplifies through the audio frequency pre-amplification circuit, power supply signal after the amplification enters filter circuit for no reason at all, enter active filter circuit again, useless interference signal is filtered, have only the effective frequency signal to be output, be reduced into sound by loud speaker again to audio power amplifying circuit.Wherein power supply is used to audio power amplifying circuit and the power supply of audio frequency pre-amplification circuit.
The utility model reasonable in design, be quick on the draw, harmonic filtration rate height, capacity is big, operation stability is high, it is used to be more suitable for foreign language teaching.
Claims (1)
1. novel foreign language teaching wireless headset, it is characterized in that: comprise power supply, magnetic reception antenna, audio frequency pre-amplification circuit, passive filter circuit, active filter circuit, audio power amplifying circuit and loud speaker, the output of this audio frequency pre-amplification circuit links to each other with the input of passive filter circuit, the output of passive filter circuit links to each other with the input of active filter circuit, and the output of active filter circuit then is connected with audio power amplifying circuit and loud speaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200456232U CN201947424U (en) | 2011-02-19 | 2011-02-19 | Novel wireless headset for teaching foreign languages |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200456232U CN201947424U (en) | 2011-02-19 | 2011-02-19 | Novel wireless headset for teaching foreign languages |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201947424U true CN201947424U (en) | 2011-08-24 |
Family
ID=44474758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200456232U Expired - Fee Related CN201947424U (en) | 2011-02-19 | 2011-02-19 | Novel wireless headset for teaching foreign languages |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201947424U (en) |
-
2011
- 2011-02-19 CN CN2011200456232U patent/CN201947424U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203261475U (en) | Super-high pitch loudspeaker with improved high-frequency bandwidth and sensitivity | |
| CN201947424U (en) | Novel wireless headset for teaching foreign languages | |
| CN201854398U (en) | Wireless earphone for foreign language listening teaching | |
| CN201805492U (en) | A television device | |
| CN201717940U (en) | Mobile phone provided with hand-free music playing function | |
| CN104682892A (en) | Audio frequency amplifier used for computer speakers | |
| CN203225871U (en) | Simplified audio frequency amplification circuit | |
| CN202818578U (en) | Special active loudspeaker having noise reduction function for reception | |
| CN202103849U (en) | Hearing aid | |
| CN202918376U (en) | Mobile phone loudspeaker | |
| CN204069289U (en) | A kind of high frequency, intermediate frequency, low frequency distribution plate sound equipment | |
| CN201995116U (en) | Sound card control circuit | |
| CN204859493U (en) | Adopt head circuit of discrete component equipment | |
| CN203435136U (en) | Audio frequency amplifier integrated with USB power supply interface | |
| CN202160146U (en) | Audio power amplifier | |
| CN104618828A (en) | Mega bass circuit for in-ear headset | |
| CN203180854U (en) | High-fidelity power amplifier | |
| CN202721721U (en) | Mobile phone microphone control circuit | |
| CN203574611U (en) | Audio frequency amplifier used for computer speaker | |
| CN203015094U (en) | Audio frequency amplification circuit | |
| CN204707097U (en) | A kind of digital power amplifier based on customizable modular processor | |
| CN202998441U (en) | Sound box power amplification circuit and sound box | |
| CN206380082U (en) | Sound transducer based on Zigbee | |
| CN201336649Y (en) | Audio power amplifier | |
| CN202799084U (en) | Energy-saving high-fidelity circuit |
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: 20110824 Termination date: 20120219 |