CN203057475U - Sounding circuit with filtering function - Google Patents
Sounding circuit with filtering function Download PDFInfo
- Publication number
- CN203057475U CN203057475U CN 201320001963 CN201320001963U CN203057475U CN 203057475 U CN203057475 U CN 203057475U CN 201320001963 CN201320001963 CN 201320001963 CN 201320001963 U CN201320001963 U CN 201320001963U CN 203057475 U CN203057475 U CN 203057475U
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- operational amplifier
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- inductance
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Abstract
The utility model discloses a sounding circuit with filtering function, and mainly solves problems of a loudspeaker in the prior art that structure is complex, cost is high and loudspeaking effect is poor. The sounding circuit with the filtering function comprises a current transformer L, a rectifier bridge U1 with an input terminal connected with the current transformer L and formed by four mutually connected diodes, a T filtering circuit with an input terminal connected with the rectifier bridge U1, an operational amplifier T1 with a non-inverting input terminal connected with an output terminal of the T filtering circuit, an operational amplifier T2 with an output terminal connected with an output terminal of the operational amplifier T1 through a horn U2, and a low pass filtering circuit connected with a non-inverting input terminal of the operational amplifier T2. Through employing the above scheme, the sounding circuit with the filtering function obtains purposes of good anti-interference capability and soundspeaking effect, low cost and small size, and has very high practical value and promotion value.
Description
Technical field
The utility model relates to a kind of pronunciation circuit, specifically, relates to a kind of pronunciation circuit with filter function.
Background technology
Loudspeaker arrangement is to need the device that uses in a lot of audio-visual devices, existing loudspeaker arrangement often needs to increase a lot of anti-interference equipments in order to realize anti-interference function, thereby volume is bigger, cost is higher, be unfavorable for some mini-plant uses cheaply, and the output of traditional one-way voice is broken down easily, and voice effect is undesirable.
The utility model content
The purpose of this utility model is to provide a kind of pronunciation circuit with filter function, mainly solves the loudspeaker arrangement complex structure that exists in the prior art, and cost is higher, the problem that voice effect is undesirable.
To achieve these goals, the technical solution adopted in the utility model is as follows:
Pronunciation circuit with filter function, comprise current transformer L, the rectifier bridge U1 that is constituted by four interconnective diodes that input links to each other with current transformer L, the T type filter circuit that input links to each other with rectifier bridge U1, also comprise the operational amplifier T1 that in-phase input end links to each other with the output of T type filter circuit, the operational amplifier T2 that output links to each other with the output of operational amplifier T1 by loudspeaker U2, the low-pass filter circuit that links to each other with the in-phase input end of operational amplifier T2.
Specifically, described T type filter circuit comprises the inductance L 1 that is in parallel with rectifier bridge U1, and all electrochemical capacitor C1 and the capacitor C 2 that is in parallel with inductance L 1 is connected in the resistance R 1 between inductance L 1 and the electrochemical capacitor C1.
The input of described capacitor C 2 also is connected with variable resistor R2, and the output of this variable resistor R2 links to each other with the in-phase input end of resistance R 3 with operational amplifier T1 by the capacitor C 3 that links to each other successively.
Link to each other by resistance R 4 between the output of described operational amplifier T1 and the inverting input; Link to each other by resistance R 6 between the inverting input of described operational amplifier T2 and the output.
Described low-pass filter circuit comprises in-phase input end and the inductance L between the ground 3 and the capacitor C 4 that all is connected in operational amplifier T2, also is connected with inductance L 2 between the input of the in-phase input end of described operational amplifier T2 and inductance L 3.
Compared with prior art, the utlity model has following beneficial effect:
(1) the utility model adopts the both-end operational amplifier to carry out dual raising one's voice, and has adopted double-smoothing simultaneously, and loud-speaking effect is even more ideal.
(2) the utility model is designed to one with rectification circuit, filter circuit, 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.
(3) 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.
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 pronunciation circuit with filter function, comprise current transformer L, the rectifier bridge U1 that is constituted by four interconnective diodes that input links to each other with current transformer L, the T type filter circuit that input links to each other with rectifier bridge U1, also comprise the operational amplifier T1 that in-phase input end links to each other with the output of T type filter circuit, the operational amplifier T2 that output links to each other with the output of operational amplifier T1 by loudspeaker U2, the low-pass filter circuit that links to each other with the in-phase input end of operational amplifier T2.
Specifically, described T type filter circuit comprises the inductance L 1 that is in parallel with rectifier bridge U1, and all electrochemical capacitor C1 and the capacitor C 2 that is in parallel with inductance L 1 is connected in the resistance R 1 between inductance L 1 and the electrochemical capacitor C1.
The input of described capacitor C 2 also is connected with variable resistor R2, and the output of this variable resistor R2 links to each other with the in-phase input end of resistance R 3 with operational amplifier T1 by the capacitor C 3 that links to each other successively.
Link to each other by resistance R 4 between the output of described operational amplifier T1 and the inverting input; Link to each other by resistance R 6 between the inverting input of described operational amplifier T2 and the output.
Described low-pass filter circuit comprises in-phase input end and the inductance L between the ground 3 and the capacitor C 4 that all is connected in operational amplifier T2, also is connected with inductance L 2 between the input of the in-phase input end of described operational amplifier T2 and inductance L 3.
According to above-described embodiment, just can realize the utility model well.
Claims (5)
1. the pronunciation circuit that has filter function, comprise current transformer L, the rectifier bridge U1 that is constituted by four interconnective diodes that input links to each other with current transformer L, the T type filter circuit that input links to each other with rectifier bridge U1, it is characterized in that, also comprise the operational amplifier T1 that in-phase input end links to each other with the output of T type filter circuit, the operational amplifier T2 that output links to each other with the output of operational amplifier T1 by loudspeaker U2, the low-pass filter circuit that links to each other with the in-phase input end of operational amplifier T2.
2. the pronunciation circuit with filter function according to claim 1, it is characterized in that, described T type filter circuit comprises the inductance L 1 that is in parallel with rectifier bridge U1, and all electrochemical capacitor C1 and the capacitor C 2 that is in parallel with inductance L 1 is connected in the resistance R 1 between inductance L 1 and the electrochemical capacitor C1.
3. the pronunciation circuit with filter function according to claim 2, it is characterized in that, the input of described capacitor C 2 also is connected with variable resistor R2, and the output of this variable resistor R2 links to each other with the in-phase input end of resistance R 3 with operational amplifier T1 by the capacitor C 3 that links to each other successively.
4. the pronunciation circuit with filter function according to claim 3 is characterized in that, links to each other by resistance R 4 between the output of described operational amplifier T1 and the inverting input; Link to each other by resistance R 6 between the inverting input of described operational amplifier T2 and the output.
5. the pronunciation circuit with filter function according to claim 4, it is characterized in that, described low-pass filter circuit comprises in-phase input end and the inductance L between the ground 3 and the capacitor C 4 that all is connected in operational amplifier T2, also is connected with inductance L 2 between the input of the in-phase input end of described operational amplifier T2 and inductance L 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320001963 CN203057475U (en) | 2013-01-05 | 2013-01-05 | Sounding circuit with filtering function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320001963 CN203057475U (en) | 2013-01-05 | 2013-01-05 | Sounding circuit with filtering function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203057475U true CN203057475U (en) | 2013-07-10 |
Family
ID=48740388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320001963 Expired - Fee Related CN203057475U (en) | 2013-01-05 | 2013-01-05 | Sounding circuit with filtering function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203057475U (en) |
-
2013
- 2013-01-05 CN CN 201320001963 patent/CN203057475U/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 |