CN203289634U - Anti-interference type loudspeaking circuit - Google Patents
Anti-interference type loudspeaking circuit Download PDFInfo
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- CN203289634U CN203289634U CN2013203554151U CN201320355415U CN203289634U CN 203289634 U CN203289634 U CN 203289634U CN 2013203554151 U CN2013203554151 U CN 2013203554151U CN 201320355415 U CN201320355415 U CN 201320355415U CN 203289634 U CN203289634 U CN 203289634U
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- operational amplifier
- resistance
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Abstract
The utility model discloses an anti-interference type loudspeaking circuit. The anti-interference type loudspeaking circuit mainly solves the problems that a loudspeaker existing in the prior art is not high in cost performance, and does not facilitate being used in some low-cost and miniature devices, and comprises an audio signal acquisition circuit; an operational amplifier T1 of which the inverted input end is connected with the output end of the audio signal acquisition circuit via a resistor R4, and the output end is connected with the output end of the audio signal acquisition circuit via a diode D1; a filter circuit connected with the inverted input end of the operational amplifier T1; and a signal amplification circuit of which the input end is connected with the filter circuit, wherein the output end and the inverted input end of the operational amplifier T1 are connected via a diode D2. By the above scheme, the anti-interference type loudspeaking circuit of the utility model achieves the purposes of being higher in cost performance and smaller in overall volume, and being suitable for being used in the low-cost and miniature devices, and has very high practical value and popularization value.
Description
Technical field
The utility model relates to a kind of loudspeaker circuit, specifically, relates to a kind of anti-interference type loudspeaker circuit.
Background technology
As everyone knows, loud speaker is device very important in the communication technology, in order to improve the audio of loud speaker, often need to connect in addition comparatively complicated filter, in the time of can causing like this use, overall volume is larger, 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 anti-interference type loudspeaker circuit, mainly solves the loud speaker cost performance that exists in prior art not high, is unfavorable for the problem of some mini-plant uses cheaply.
To achieve these goals, the technical solution adopted in the utility model is as follows:
the anti-interference type loudspeaker circuit, it comprises the audio signal sample circuit, inverting input is connected with the output of audio signal sample circuit by resistance R 4, and the operational amplifier T1 that output is connected with the output of audio signal sample circuit by diode D1, and the filter circuit that is connected with the inverting input of operational amplifier T1, the signal amplification circuit that input is connected with filter circuit, the output of described operational amplifier T1 is connected by diode D2 with inverting input, described filter circuit comprises the resistance R 8 that in-phase input end passes through to be connected successively, resistance R 6, capacitor C 2, the operational amplifier T2 that resistance R 5 is connected with the inverting input of operational amplifier T1, be connected in in-phase input end and the capacitor C between ground 4 of operational amplifier T2, one end is connected between capacitor C 2 and resistance R 6, the resistance R 7 of other end ground connection, one end is connected between resistance R 6 and resistance R 8, the other end is connected in the capacitor C 3 of the output of operational amplifier T2, described signal amplification circuit is connected with the output of operational amplifier T2.
Specifically, described audio signal sample circuit comprises triode Q1, the triode Q2 that base stage is connected with the collector electrode of triode Q1, between the collector electrode that is connected in triode Q2 and ground and capacitor C 1 and the resistance R 3 of mutually connecting, be connected in the base stage of triode Q1 and the buzzing sheet U between ground, described resistance R 4 one ends are connected with the collector electrode of triode Q2, the other end is connected with the inverting input of operational amplifier T1, and described diode D1 one end is connected with the collector electrode of triode Q2, the other end is connected with the output of operational amplifier T1.
Further, the base stage of described triode Q1 is connected with pull-up resistor R1, and the base stage of described triode Q2 is connected with pull-up resistor R2.
As preferably, described signal amplification circuit comprises operational amplifier T3, one end is connected with the inverting input of operational amplifier T3, the other end passes through respectively Schottky diode D4 and mutual resistance R 9, the Schottky diode D3 and the resistance R 10 that the output of operational amplifier T2 is connected that connects, and is connected in inverting input and the resistance R between output 11 of operational amplifier T3.
Compared with prior art, the utlity model has following beneficial effect:
(1) the utility model is designed to one with audio signal sample circuit, filter circuit, detecting circuit, signal amplification circuit, and according to actual conditions, has selected the components and parts that cost is minimum, effect is best to carry out circuit design, 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, and cost performance is higher, is fit to large-scale promotion application.
(3) in the utility model, adopt and both to have had circuit that high pass filter function also has the low-pass filtering function as filter circuit, circuit structure is very ingenious, and anti-interference effect is fairly obvious, realistic 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
not high in order to solve the loud speaker cost performance that exists in prior art, the problem that is unfavorable for some mini-plant uses cheaply, as shown in Figure 1, the utility model discloses a kind of anti-interference type loudspeaker circuit, it comprises the audio signal sample circuit, inverting input is connected with the output of audio signal sample circuit by resistance R 4, and the operational amplifier T1 that output is connected with the output of audio signal sample circuit by diode D1, and the filter circuit that is connected with the inverting input of operational amplifier T1, the signal amplification circuit that input is connected with filter circuit, the output of described operational amplifier T1 is connected by diode D2 with inverting input, described filter circuit comprises the resistance R 8 that in-phase input end passes through to be connected successively, resistance R 6, capacitor C 2, the operational amplifier T2 that resistance R 5 is connected with the inverting input of operational amplifier T1, be connected in in-phase input end and the capacitor C between ground 4 of operational amplifier T2, one end is connected between capacitor C 2 and resistance R 6, the resistance R 7 of other end ground connection, one end is connected between resistance R 6 and resistance R 8, the other end is connected in the capacitor C 3 of the output of operational amplifier T2, described signal amplification circuit is connected with the output of operational amplifier T2.Wherein, resistance R 4, diode D1, diode D2, operational amplifier T1 have formed detecting circuit.
Specifically, described audio signal sample circuit comprises triode Q1, the triode Q2 that base stage is connected with the collector electrode of triode Q1, between the collector electrode that is connected in triode Q2 and ground and capacitor C 1 and the resistance R 3 of mutually connecting, be connected in the base stage of triode Q1 and the buzzing sheet U between ground, described resistance R 4 one ends are connected with the collector electrode of triode Q2, the other end is connected with the inverting input of operational amplifier T1, and described diode D1 one end is connected with the collector electrode of triode Q2, the other end is connected with the output of operational amplifier T1.
Further, the base stage of described triode Q1 is connected with pull-up resistor R1, and the base stage of described triode Q2 is connected with pull-up resistor R2.
As preferably, described signal amplification circuit comprises operational amplifier T3, one end is connected with the inverting input of operational amplifier T3, the other end passes through respectively Schottky diode D4 and mutual resistance R 9, the Schottky diode D3 and the resistance R 10 that the output of operational amplifier T2 is connected that connects, and is connected in inverting input and the resistance R between output 11 of operational amplifier T3.
On the basis of foregoing circuit, the present embodiment also is connected with part auxiliary element and line, is used for guaranteeing the normal operation of circuit, and the use of these auxiliary elements and line belongs to the circuit application custom of industry universal, does not repeat them here.
, according to above-described embodiment, just can realize well the utility model.
Claims (4)
1. anti-interference type loudspeaker circuit, it is characterized in that, comprise the audio signal sample circuit, inverting input is connected with the output of audio signal sample circuit by resistance R 4, and the operational amplifier T1 that output is connected with the output of audio signal sample circuit by diode D1, and the filter circuit that is connected with the inverting input of operational amplifier T1, the signal amplification circuit that input is connected with filter circuit, the output of described operational amplifier T1 is connected by diode D2 with inverting input, described filter circuit comprises the resistance R 8 that in-phase input end passes through to be connected successively, resistance R 6, capacitor C 2, the operational amplifier T2 that resistance R 5 is connected with the inverting input of operational amplifier T1, be connected in in-phase input end and the capacitor C between ground 4 of operational amplifier T2, one end is connected between capacitor C 2 and resistance R 6, the resistance R 7 of other end ground connection, one end is connected between resistance R 6 and resistance R 8, the other end is connected in the capacitor C 3 of the output of operational amplifier T2, described signal amplification circuit is connected with the output of operational amplifier T2.
2. anti-interference type loudspeaker circuit according to claim 1, it is characterized in that, described audio signal sample circuit comprises triode Q1, the triode Q2 that base stage is connected with the collector electrode of triode Q1, be connected between the collector electrode and ground of triode Q2, and capacitor C 1 and the resistance R 3 of mutually connecting, be connected in the base stage of triode Q1 and the buzzing sheet U between ground, described resistance R 4 one ends are connected with the collector electrode of triode Q2, the other end is connected with the inverting input of operational amplifier T1, described diode D1 one end is connected with the collector electrode of triode Q2, the other end is connected with the output of operational amplifier T1.
3. anti-interference type loudspeaker circuit according to claim 2, is characterized in that, the base stage of described triode Q1 is connected with pull-up resistor R1, and the base stage of described triode Q2 is connected with pull-up resistor R2.
4. anti-interference type loudspeaker circuit according to claim 3, it is characterized in that, described signal amplification circuit comprises operational amplifier T3, one end is connected with the inverting input of operational amplifier T3, the other end passes through respectively Schottky diode D4 and mutual resistance R 9, the Schottky diode D3 and the resistance R 10 that the output of operational amplifier T2 is connected that connects, and is connected in inverting input and the resistance R between output 11 of operational amplifier T3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203554151U CN203289634U (en) | 2013-06-20 | 2013-06-20 | Anti-interference type loudspeaking circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203554151U CN203289634U (en) | 2013-06-20 | 2013-06-20 | Anti-interference type loudspeaking circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203289634U true CN203289634U (en) | 2013-11-13 |
Family
ID=49545973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203554151U Expired - Lifetime CN203289634U (en) | 2013-06-20 | 2013-06-20 | Anti-interference type loudspeaking circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203289634U (en) |
-
2013
- 2013-06-20 CN CN2013203554151U patent/CN203289634U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CHENGDU BOST INFORMATION TECHNOLOGY CO., LTD. Free format text: FORMER NAME: CHENGDU BOOST TECHNOLOGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 610000, Sichuan, Chengdu province Wuhou District Wu Qing Road (Wuhou hi tech Innovation Center incubator) Patentee after: CHENGDU BOOST INFORMATION TECHNOLOGY Co.,Ltd. Address before: 610000, Sichuan, Chengdu province Wuhou District Wu Qing Road (Wuhou hi tech Innovation Center incubator) Patentee before: CHENGDU BOOST TECHNOLOGY Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131113 |