CN203057083U - High-accuracy negative feedback active audio machine - Google Patents
High-accuracy negative feedback active audio machine Download PDFInfo
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- CN203057083U CN203057083U CN 201320001572 CN201320001572U CN203057083U CN 203057083 U CN203057083 U CN 203057083U CN 201320001572 CN201320001572 CN 201320001572 CN 201320001572 U CN201320001572 U CN 201320001572U CN 203057083 U CN203057083 U CN 203057083U
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- operational amplifier
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Abstract
The utility model discloses a high-accuracy negative feedback active audio machine. The problems that in the prior art, an existing audio amplification circuit does not have a power supply circuit and a filter circuit, structure is complex, cost is high, and sound generating effect is not good are mainly solved. The high-accuracy negative feedback active audio machine comprises a series-connection negative feedback voltage-stabilized source circuit, an audio circuit connected with the series-connection negative feedback voltage-stabilized source circuit, and filter circuits connected on two ends of the audio circuit. According to the high-accuracy negative feedback active audio machine, the purpose of active audio amplification is achieved, anti-jamming capability is strong, size is small, and high practical value and high promotional value are achieved.
Description
Technical field
The utility model relates to a kind of audio set, specifically, relates to a kind of high accuracy negative feedback active audio frequency machine.
Background technology
Audio amplifier circuit is the circuit that will use in a lot of audio-visual devices, yet present audio-visual devices does not mostly have power circuit, need to connect in addition independent current source, and volume is bigger, and cost is higher, and voice effect is bad, is not easy to use.
The utility model content
The purpose of this utility model is to provide a kind of high accuracy negative feedback active audio frequency machine, mainly solve the audio amplifier circuit passing circuit that exists in the prior art, and volume is bigger, and voice effect is bad, the cost problem of higher.
To achieve these goals, the technical solution adopted in the utility model is as follows:
High accuracy negative feedback active audio frequency machine, comprise series connection negative feedback voltage-stabilized power supply circuit, also comprise all capacitor C 5 and inductance L 2 with the negative feedback voltage-stabilized power supply circuit parallel connection of connecting, be connected in the inductance L 1 between the output of the input of inductance L 2 and series connection negative feedback voltage-stabilized power supply circuit, the resistance R 7 of in-phase input end by linking to each other successively, the operational amplifier T1 that capacitor C 3 and resistance R 8 link to each other with the output of inductance L 1, the operational amplifier T2 that output links to each other with the output of operational amplifier T1 by loudspeaker U2, be connected in in-phase input end and the inductance L between the inverting input 3 of operational amplifier T2, the rectification circuit U1 that is formed by connecting by four diodes that links to each other with inductance L 3, equal inductance L 4 in parallel with rectification circuit U1, capacitor C 6 and capacitor C 7 are connected in the resistance R 12 between inductance L 4 and the capacitor C 6.
Specifically, described series connection negative feedback voltage-stabilized power supply circuit comprises triode Q1, the triode Q2 that collector electrode links to each other with the base stage of triode Q1, be connected in the resistance R 2 between the emitter of the emitter of triode Q1 and triode Q2, equal and resistance R 3 of linking to each other successively in parallel with resistance R 2, resistance R 4 and resistance R 5, described resistance R 4 is slide rheostat, two stiff end links to each other with resistance R 5 with resistance R 3 respectively, its sliding end links to each other with the base stage of triode Q2, the described resistance R 3 that links to each other successively, the two ends of resistance R 4 and resistance R 5 also are parallel with resistance R 6, and the input of described inductance L 1 links to each other with resistance R 6.
The inverting input of described operational amplifier T1 links to each other by resistance R 9 with output, the inverting input of described operational amplifier T2 links to each other by resistance R 11 with output, and the inverting input of the inverting input of described operational amplifier T1 and operational amplifier T2 links to each other with resistance R 10 by capacitor C 2.
Compared with prior art, the utlity model has following beneficial effect:
(1) the utility model is designed to one with power circuit, filter circuit and audio power amplifying 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 utility model is simple in structure, uses less components and parts to realize a kind of high accuracy negative feedback active audio frequency machine, 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 a kind of high accuracy negative feedback active audio frequency machine, comprise series connection negative feedback voltage-stabilized power supply circuit, also comprise all capacitor C 5 and inductance L 2 with the negative feedback voltage-stabilized power supply circuit parallel connection of connecting, be connected in the inductance L 1 between the output of the input of inductance L 2 and series connection negative feedback voltage-stabilized power supply circuit, the resistance R 7 of in-phase input end by linking to each other successively, the operational amplifier T1 that capacitor C 3 and resistance R 8 link to each other with the output of inductance L 1, the operational amplifier T2 that output links to each other with the output of operational amplifier T1 by loudspeaker U2, be connected in in-phase input end and the inductance L between the inverting input 3 of operational amplifier T2, the rectification circuit U1 that is formed by connecting by four diodes that links to each other with inductance L 3, equal inductance L 4 in parallel with rectification circuit U1, capacitor C 6 and capacitor C 7 are connected in the resistance R 12 between inductance L 4 and the capacitor C 6.
Specifically, described series connection negative feedback voltage-stabilized power supply circuit comprises triode Q1, the triode Q2 that collector electrode links to each other with the base stage of triode Q1, be connected in the resistance R 2 between the emitter of the emitter of triode Q1 and triode Q2, equal and resistance R 3 of linking to each other successively in parallel with resistance R 2, resistance R 4 and resistance R 5, described resistance R 4 is slide rheostat, two stiff end links to each other with resistance R 5 with resistance R 3 respectively, its sliding end links to each other with the base stage of triode Q2, the described resistance R 3 that links to each other successively, the two ends of resistance R 4 and resistance R 5 also are parallel with resistance R 6, and the input of described inductance L 1 links to each other with resistance R 6.
The inverting input of described operational amplifier T1 links to each other by resistance R 9 with output, the inverting input of described operational amplifier T2 links to each other by resistance R 11 with output, and the inverting input of the inverting input of described operational amplifier T1 and operational amplifier T2 links to each other with resistance R 10 by capacitor C 2.
According to above-described embodiment, just can realize the utility model well.
Claims (3)
1. high accuracy negative feedback active audio frequency machine, comprise series connection negative feedback voltage-stabilized power supply circuit, it is characterized in that, also comprise all capacitor C 5 and inductance L 2 with the negative feedback voltage-stabilized power supply circuit parallel connection of connecting, be connected in the inductance L 1 between the output of the input of inductance L 2 and series connection negative feedback voltage-stabilized power supply circuit, the resistance R 7 of in-phase input end by linking to each other successively, the operational amplifier T1 that capacitor C 3 and resistance R 8 link to each other with the output of inductance L 1, the operational amplifier T2 that output links to each other with the output of operational amplifier T1 by loudspeaker U2, be connected in in-phase input end and the inductance L between the inverting input 3 of operational amplifier T2, the rectification circuit U1 that is formed by connecting by four diodes that links to each other with inductance L 3, equal inductance L 4 in parallel with rectification circuit U1, capacitor C 6 and capacitor C 7 are connected in the resistance R 12 between inductance L 4 and the capacitor C 6.
2. high accuracy negative feedback active audio frequency machine according to claim 1, it is characterized in that, described series connection negative feedback voltage-stabilized power supply circuit comprises triode Q1, the triode Q2 that collector electrode links to each other with the base stage of triode Q1, be connected in the resistance R 2 between the emitter of the emitter of triode Q1 and triode Q2, equal and resistance R 3 of linking to each other successively in parallel with resistance R 2, resistance R 4 and resistance R 5, described resistance R 4 is slide rheostat, two stiff end links to each other with resistance R 5 with resistance R 3 respectively, its sliding end links to each other with the base stage of triode Q2, the described resistance R 3 that links to each other successively, the two ends of resistance R 4 and resistance R 5 also are parallel with resistance R 6, and the input of described inductance L 1 links to each other with resistance R 6.
3. high accuracy negative feedback active audio frequency machine according to claim 2, it is characterized in that, the inverting input of described operational amplifier T1 links to each other by resistance R 9 with output, the inverting input of described operational amplifier T2 links to each other by resistance R 11 with output, and the inverting input of the inverting input of described operational amplifier T1 and operational amplifier T2 links to each other with resistance R 10 by capacitor C 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320001572 CN203057083U (en) | 2013-01-05 | 2013-01-05 | High-accuracy negative feedback active audio machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320001572 CN203057083U (en) | 2013-01-05 | 2013-01-05 | High-accuracy negative feedback active audio machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203057083U true CN203057083U (en) | 2013-07-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320001572 Expired - Fee Related CN203057083U (en) | 2013-01-05 | 2013-01-05 | High-accuracy negative feedback active audio machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203057083U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106627481A (en) * | 2017-01-18 | 2017-05-10 | 无锡猎吧网络科技有限公司 | Vehicle identification system intelligent control part |
-
2013
- 2013-01-05 CN CN 201320001572 patent/CN203057083U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106627481A (en) * | 2017-01-18 | 2017-05-10 | 无锡猎吧网络科技有限公司 | Vehicle identification system intelligent control part |
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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 |