CN203057472U - Dual-noise reduction sounding device - Google Patents
Dual-noise reduction sounding device Download PDFInfo
- Publication number
- CN203057472U CN203057472U CN 201320001071 CN201320001071U CN203057472U CN 203057472 U CN203057472 U CN 203057472U CN 201320001071 CN201320001071 CN 201320001071 CN 201320001071 U CN201320001071 U CN 201320001071U CN 203057472 U CN203057472 U CN 203057472U
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- capacitor
- operational amplifier
- resistance
- noise reduction
- inverting input
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Abstract
The utility model discloses a dual-noise reduction sounding device, and mainly solves problems of complex structure and high cost in the prior art for reducing noises of an audio frequency device. The dual-noise reduction sounding device comprises an operational amplifier T1 with a non-inverting input terminal connected with a resistor R1 and a capacitor C1, a capacitor C4 connected with an inverting input terminal of the operational amplifier T1, a resistor R2 and resistor R3 respectively connected with an input terminal and an output terminal of the capacitor C4, a resistor R5, an inductor L2 and a capacitor C3 all connected between an output terminal and the inverting input terminal of the operational amplifier T1, a capacitor C9, a resistor R11 and a capacitor C10 all connected in parallel with the capacitor C3, an inductor L1 connected between input terminals of the capacitor C9 and the capacitor C10, an audio frequency amplifying circuit connected with the inductor L1, and a filter circuit connected with the audio frequency amplifying circuit. Through employing the scheme, the dual-noise reduction sounding device obtains purposes of good anti-interference capability and low cost, and has very high practical value and promotion value.
Description
Technical field
The utility model relates to a kind of pronunciation device, specifically, relates to dual noise reduction pronunciation device.
Background technology
The audio frequency device is device indispensable in the audio frequency apparatus, in order to improve the audio of audio frequency device, often needs to connect in addition filter, and overall volume is bigger in the time of can causing use like this, and cost is higher, is unfavorable for some mini-plant uses cheaply.
The utility model content
The purpose of this utility model is to provide dual noise reduction pronunciation device, mainly solves the audio frequency device complex structure that exists in the prior art, the cost problem of higher.
To achieve these goals, the technical solution adopted in the utility model is as follows:
Dual noise reduction pronunciation device, it is characterized in that, comprise that in-phase input end is connected with the operational amplifier T1 of resistance R 1 and capacitor C 1, the capacitor C 4 that links to each other with the inverting input of operational amplifier T1, be connected to resistance R 2 and the resistance R 3 of input and the output of capacitor C 4, all be connected in output and the resistance R between the inverting input 5 of operational amplifier T1, inductance L 2 and capacitor C 3, equal capacitor C 9 in parallel with capacitor C 3, resistance R 11 and capacitor C 10, be connected in the inductance L 1 between the input of capacitor C 9 and capacitor C 10, the resistance R 7 of in-phase input end by linking to each other successively, the operational amplifier T2 that capacitor C 6 and resistance R 6 link to each other with the input of resistance R 11, the operational amplifier T3 that output links to each other with the output of operational amplifier T2 by loudspeaker U1, all be connected in in-phase input end and the inductance L between the reverse input end 3 and the capacitor C 11 of operational amplifier T3, also be connected with inductance L 4 between the in-phase input end of described inductance L 3 and operational amplifier T3.
Specifically, also be connected with resistance R 4 between the inverting input of described resistance R 5 and operational amplifier T1, also be connected with capacitor C 2 between the output of the output of resistance R 5 and inductance L 2.
The output of described operational amplifier T2 links to each other by resistance R 8 with inverting input, the output of operational amplifier T3 links to each other by resistance R 10 with inverting input, and the inverting input of operational amplifier T2 and operational amplifier T3 links to each other with resistance R 9 by capacitor C 7.
Compared with prior art, the utlity model has following beneficial effect:
(1) the utility model is designed to one with audio frequency front end circuit, filter circuit, voicefrequency circuit, and has selected for use 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 low noise circuit has improved the antijamming capability when using greatly as the audio frequency front end circuit in the utility model, has improved audio.
(3) the utility model is simple in structure, uses less components and parts to realize decrease of noise functions, and with low cost, volume is small and exquisite, is fit to large-scale promotion application.
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 dual noise reduction pronunciation device, it is characterized in that, comprise that in-phase input end is connected with the operational amplifier T1 of resistance R 1 and capacitor C 1, the capacitor C 4 that links to each other with the inverting input of operational amplifier T1, be connected to resistance R 2 and the resistance R 3 of input and the output of capacitor C 4, all be connected in output and the resistance R between the inverting input 5 of operational amplifier T1, inductance L 2 and capacitor C 3, equal capacitor C 9 in parallel with capacitor C 3, resistance R 11 and capacitor C 10, be connected in the inductance L 1 between the input of capacitor C 9 and capacitor C 10, the resistance R 7 of in-phase input end by linking to each other successively, the operational amplifier T2 that capacitor C 6 and resistance R 6 link to each other with the input of resistance R 11, the operational amplifier T3 that output links to each other with the output of operational amplifier T2 by loudspeaker U1, all be connected in in-phase input end and the inductance L between the reverse input end 3 and the capacitor C 11 of operational amplifier T3, also be connected with inductance L 4 between the in-phase input end of described inductance L 3 and operational amplifier T3.
Specifically, also be connected with resistance R 4 between the inverting input of described resistance R 5 and operational amplifier T1, also be connected with capacitor C 2 between the output of the output of resistance R 5 and inductance L 2.
The output of described operational amplifier T2 links to each other by resistance R 8 with inverting input, the output of operational amplifier T3 links to each other by resistance R 10 with inverting input, and the inverting input of operational amplifier T2 and operational amplifier T3 links to each other with resistance R 9 by capacitor C 7.
According to above-described embodiment, just can realize the utility model well.
Claims (3)
1. dual noise reduction pronunciation device, it is characterized in that, comprise that in-phase input end is connected with the operational amplifier T1 of resistance R 1 and capacitor C 1, the capacitor C 4 that links to each other with the inverting input of operational amplifier T1, be connected to resistance R 2 and the resistance R 3 of input and the output of capacitor C 4, all be connected in output and the resistance R between the inverting input 5 of operational amplifier T1, inductance L 2 and capacitor C 3, equal capacitor C 9 in parallel with capacitor C 3, resistance R 11 and capacitor C 10, be connected in the inductance L 1 between the input of capacitor C 9 and capacitor C 10, the resistance R 7 of in-phase input end by linking to each other successively, the operational amplifier T2 that capacitor C 6 and resistance R 6 link to each other with the input of resistance R 11, the operational amplifier T3 that output links to each other with the output of operational amplifier T2 by loudspeaker U1, all be connected in in-phase input end and the inductance L between the reverse input end 3 and the capacitor C 11 of operational amplifier T3, also be connected with inductance L 4 between the in-phase input end of described inductance L 3 and operational amplifier T3.
2. dual noise reduction pronunciation device according to claim 1 is characterized in that, also is connected with resistance R 4 between the inverting input of described resistance R 5 and operational amplifier T1, also is connected with capacitor C 2 between the output of the output of resistance R 5 and inductance L 2.
3. dual noise reduction pronunciation device according to claim 2, it is characterized in that, the output of described operational amplifier T2 links to each other by resistance R 8 with inverting input, the output of operational amplifier T3 links to each other by resistance R 10 with inverting input, and the inverting input of operational amplifier T2 and operational amplifier T3 links to each other with resistance R 9 by capacitor C 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320001071 CN203057472U (en) | 2013-01-05 | 2013-01-05 | Dual-noise reduction sounding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320001071 CN203057472U (en) | 2013-01-05 | 2013-01-05 | Dual-noise reduction sounding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203057472U true CN203057472U (en) | 2013-07-10 |
Family
ID=48740385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320001071 Expired - Fee Related CN203057472U (en) | 2013-01-05 | 2013-01-05 | Dual-noise reduction sounding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203057472U (en) |
-
2013
- 2013-01-05 CN CN 201320001071 patent/CN203057472U/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: 20130710 Termination date: 20140105 |