CN203057467U - Low noise vocal apparatus - Google Patents
Low noise vocal apparatus Download PDFInfo
- Publication number
- CN203057467U CN203057467U CN 201320001066 CN201320001066U CN203057467U CN 203057467 U CN203057467 U CN 203057467U CN 201320001066 CN201320001066 CN 201320001066 CN 201320001066 U CN201320001066 U CN 201320001066U CN 203057467 U CN203057467 U CN 203057467U
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- China
- Prior art keywords
- operational amplifier
- capacitor
- resistance
- low noise
- inverting input
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Abstract
The utility model discloses a low noise vocal apparatus, and mainly solves problems of complex structure and high cost for reducing noises of a vocal apparatus in the prior art. The low noise vocal apparatus 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 a resistor R3 respectively connected with an input terminal and an output terminal of the capacitor C4, an inductor L connected with the operational amplifier T1 through a resistor R5, an inductor L2 and a capacitor C3, a rectifier bridge U2 connected with the inductor L, and an audio frequency amplification circuit connected with the rectifier bridge, wherein the resistor R5, the inductor L2 and the capacitor C3 are connected in parallel between an output terminal and the inverting input terminal of the operational amplifier T1. Through the above scheme, the low noise vocal apparatus is provided with good anti-interference capability, is low in cost, small in size, and has very high practical value and popularization value.
Description
Technical field
The utility model relates to a kind of acoustic generator, specifically, relates to a kind of low noise acoustic generator.
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 a kind of low noise acoustic generator, 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:
The low noise acoustic generator, 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, by output and the resistance R between the inverting input 5 that is parallel to operational amplifier T1, the inductance L that inductance L 2 and capacitor C 3 link to each other with operational amplifier T1, the rectifier bridge U2 that links to each other with inductance L, in-phase input end is by inductance L 1 all in parallel with rectifier bridge, the operational amplifier T2 that capacitor C 9 and capacitor C 10 link to each other with rectifier bridge, the operational amplifier T3 that output links to each other with the output of operational amplifier T2 by loudspeaker U1.
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 in-phase input end of described operational amplifier T2 links to each other with the input of capacitor C 10 by resistance R 7, capacitor C 6, the resistance R 6 that links to each other successively.
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.
As shown in Figure 1, the utility model discloses a kind of low noise acoustic generator, 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, by output and the resistance R between the inverting input 5 that is parallel to operational amplifier T1, the inductance L that inductance L 2 and capacitor C 3 link to each other with operational amplifier T1, the rectifier bridge U2 that links to each other with inductance L, in-phase input end is by inductance L 1 all in parallel with rectifier bridge, the operational amplifier T2 that capacitor C 9 and capacitor C 10 link to each other with rectifier bridge, the operational amplifier T3 that output links to each other with the output of operational amplifier T2 by loudspeaker U1.
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 in-phase input end of described operational amplifier T2 links to each other with the input of capacitor C 10 by resistance R 7, capacitor C 6, the resistance R 6 that links to each other successively.
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 (4)
1. low noise acoustic generator, 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, by output and the resistance R between the inverting input 5 that is parallel to operational amplifier T1, the inductance L that inductance L 2 and capacitor C 3 link to each other with operational amplifier T1, the rectifier bridge U2 that links to each other with inductance L, in-phase input end is by inductance L 1 all in parallel with rectifier bridge, the operational amplifier T2 that capacitor C 9 and capacitor C 10 link to each other with rectifier bridge, the operational amplifier T3 that output links to each other with the output of operational amplifier T2 by loudspeaker U1.
2. low noise acoustic generator 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. low noise acoustic generator according to claim 2 is characterized in that, the in-phase input end of described operational amplifier T2 links to each other with the input of capacitor C 10 by resistance R 7, capacitor C 6, the resistance R 6 that links to each other successively.
4. low noise acoustic generator according to claim 3, 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 201320001066 CN203057467U (en) | 2013-01-05 | 2013-01-05 | Low noise vocal apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320001066 CN203057467U (en) | 2013-01-05 | 2013-01-05 | Low noise vocal apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203057467U true CN203057467U (en) | 2013-07-10 |
Family
ID=48740380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320001066 Expired - Fee Related CN203057467U (en) | 2013-01-05 | 2013-01-05 | Low noise vocal apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203057467U (en) |
-
2013
- 2013-01-05 CN CN 201320001066 patent/CN203057467U/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 |