CN203027449U - Interference-resisting sounding device - Google Patents
Interference-resisting sounding device Download PDFInfo
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- CN203027449U CN203027449U CN 201220647943 CN201220647943U CN203027449U CN 203027449 U CN203027449 U CN 203027449U CN 201220647943 CN201220647943 CN 201220647943 CN 201220647943 U CN201220647943 U CN 201220647943U CN 203027449 U CN203027449 U CN 203027449U
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- inductance
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- interference
- filter circuit
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Abstract
The utility model discloses an interference-resisting sounding device which is mainly used for solving the problems in the prior art that a sounding device is complicated in structure and high in cost. The interference-resisting sounding device comprises a low-pass filtering circuit, an audio power amplifying circuit, a TT type filtering circuit and a loudspeaker U1, wherein an input terminal of the audio power amplifying circuit is connected with the low-pass filtering circuit, an input terminal of the TT type filtering circuit is connected with the audio power amplifying circuit, and an input terminal of the loudspeaker U1 is connected with the TT type filtering circuit. Through the scheme, the interference-resisting sounding device achieves the aims of better interference resistance, low cost and small size and has high practical and promotional values.
Description
Technical field
The utility model relates to a kind of pronunciation device, specifically, relates to a kind of anti-interference type pronunciation device.
Background technology
Pronunciation device is to need the device that uses in a lot of audio-visual devices, existing pronunciation device is in order to realize that anti-interference function often needs to increase a lot of anti-interference equipments, thereby volume is larger, and cost is higher, filter effect is general, is unfavorable for some mini-plant uses cheaply.
The utility model content
The purpose of this utility model is to provide a kind of anti-interference type pronunciation device, mainly solves the pronunciation device complex structure that exists in prior art, the problem that cost is higher.
To achieve these goals, the technical solution adopted in the utility model is as follows:
The anti-interference type pronunciation device comprises low-pass filter circuit, the audio power amplifying circuit that input is connected with low-pass filter circuit, the TT type filter circuit that input is connected with audio power amplifying circuit, the loudspeaker U1 that input is connected with TT type filter circuit.
Specifically, described low-pass filter circuit comprises inductance L parallel with one another 1 and capacitor C 1, the inductance L that input is connected with the input of inductance L 1; The operational amplifier T that described audio power amplifying circuit comprises that in-phase input end passes through that inductance L 4 is connected with the input of capacitor C 1, the resistance R 2 of inverting input by series connection mutually and diode D1 are connected with the output of capacitor C 1, be connected in output and the inductance L between ground 3 of operational amplifier T, be connected in the diode D2 between the output of inductance L 3 and operational amplifier T, be connected in inverting input and the inductance L between ground 2 of operational amplifier T; Described TT type filter circuit comprises all capacitor C 3, capacitor C 2 and the resistance R 3 that is in parallel with diode D2, is connected in the inductance L 5 between the input of capacitor C 3 and capacitor C 2, and described loudspeaker U1 is connected between the input and ground of resistance R 3.
Compared with prior art, the utlity model has following beneficial effect:
(1) the utility model is designed to one with TT type filter circuit, low-pass filter circuit, audio power amplifying circuit, and has selected the components and parts that cost is minimum, effect is best to carry out circuit design according to actual conditions, accords with the demands of the market.
(2) the utility model is simple in structure, uses less components and parts to realize anti-interference function, and with low cost, volume is small and exquisite, is fit to large-scale promotion application.
(3) the utility model adopts low-pass filter circuit and TT type filter circuit to carry out double-smoothing, has greatly improved filter effect, has higher anti-noise function, meets people's demand.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples, and execution mode of the present utility model includes but not limited to the following example.
Embodiment
As shown in Figure 1, the utility model discloses a kind of anti-interference type pronunciation device, comprise low-pass filter circuit, the audio power amplifying circuit that input is connected with low-pass filter circuit, the TT type filter circuit that input is connected with audio power amplifying circuit, the loudspeaker U1 that input is connected with TT type filter circuit.
Specifically, described low-pass filter circuit comprises inductance L parallel with one another 1 and capacitor C 1, the inductance L that input is connected with the input of inductance L 1; The operational amplifier T that described audio power amplifying circuit comprises that in-phase input end passes through that inductance L 4 is connected with the input of capacitor C 1, the resistance R 2 of inverting input by series connection mutually and diode D1 are connected with the output of capacitor C 1, be connected in output and the inductance L between ground 3 of operational amplifier T, be connected in the diode D2 between the output of inductance L 3 and operational amplifier T, be connected in inverting input and the inductance L between ground 2 of operational amplifier T; Described TT type filter circuit comprises all capacitor C 3, capacitor C 2 and the resistance R 3 that is in parallel with diode D2, is connected in the inductance L 5 between the input of capacitor C 3 and capacitor C 2, and described loudspeaker U1 is connected between the input and ground of resistance R 3.
According to above-described embodiment, just can realize well the utility model.
Claims (4)
1. anti-interference type pronunciation device, it is characterized in that, comprise low-pass filter circuit, the audio power amplifying circuit that input is connected with low-pass filter circuit, the TT type filter circuit that input is connected with audio power amplifying circuit, the loudspeaker U1 that input is connected with TT type filter circuit.
2. anti-interference type pronunciation device according to claim 1, is characterized in that, described low-pass filter circuit comprises inductance L parallel with one another 1 and capacitor C 1, the inductance L that input is connected with the input of inductance L 1.
3. anti-interference type pronunciation device according to claim 2, it is characterized in that, the operational amplifier T that described audio power amplifying circuit comprises that in-phase input end passes through that inductance L 4 is connected with the input of capacitor C 1, the resistance R 2 of inverting input by series connection mutually and diode D1 are connected with the output of capacitor C 1, be connected in output and the inductance L between ground 3 of operational amplifier T, be connected in the diode D2 between the output of inductance L 3 and operational amplifier T, be connected in inverting input and the inductance L between ground 2 of operational amplifier T.
4. anti-interference type pronunciation device according to claim 3, it is characterized in that, described TT type filter circuit comprises all capacitor C 3, capacitor C 2 and the resistance R 3 that is in parallel with diode D2, be connected in the inductance L 5 between the input of capacitor C 3 and capacitor C 2, described loudspeaker U1 is connected between the input and ground of resistance R 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220647943 CN203027449U (en) | 2012-11-30 | 2012-11-30 | Interference-resisting sounding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220647943 CN203027449U (en) | 2012-11-30 | 2012-11-30 | Interference-resisting sounding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203027449U true CN203027449U (en) | 2013-06-26 |
Family
ID=48651390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220647943 Expired - Fee Related CN203027449U (en) | 2012-11-30 | 2012-11-30 | Interference-resisting sounding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203027449U (en) |
-
2012
- 2012-11-30 CN CN 201220647943 patent/CN203027449U/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: 20130626 Termination date: 20131130 |