CN214154458U - Current amplifying circuit - Google Patents
Current amplifying circuit Download PDFInfo
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- CN214154458U CN214154458U CN202022946612.3U CN202022946612U CN214154458U CN 214154458 U CN214154458 U CN 214154458U CN 202022946612 U CN202022946612 U CN 202022946612U CN 214154458 U CN214154458 U CN 214154458U
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- 230000003321 amplification Effects 0.000 claims abstract description 17
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 17
- 230000003014 reinforcing effect Effects 0.000 abstract description 2
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- 238000012986 modification Methods 0.000 description 2
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Abstract
The utility model discloses a current amplification circuit, including fifth bipolar transistor, sixth bipolar transistor, seventh bipolar transistor, eighth bipolar transistor, ninth bipolar transistor, tenth bipolar transistor, eleventh bipolar transistor, twelfth bipolar transistor and thirteenth bipolar transistor; the base electrode of the sixth bipolar transistor is used as the input end of the current amplifying circuit; and the collector of the sixth bipolar transistor is connected with the base of the eighth bipolar transistor, the collector of the eighth bipolar transistor is connected with the base of the fifth bipolar transistor, and the emitter of the fifth bipolar transistor is connected to the output end of the current amplifying circuit. The utility model discloses a current amplification circuit adopts discrete difference input circuit final stage to push away and smooths the output circuit structure, adopts this kind of structure can be to reinforcing to loudspeaker control power, and the performance is relatively higher to big dynamic audio frequency simultaneously, but wide application in stereo set power amplifier technical field.
Description
Technical Field
The utility model relates to a stereo set power amplifier technical field especially relates to a current amplification circuit.
Background
The sound equipment refers to a whole set of equipment capable of restoring and playing audio signals, and comprises a sound box main machine box body, a subwoofer box body and the like, wherein a power amplifier in the sound equipment amplifies the audio signals and then emits sound back by the sound box body, so that the sound of the sound box body is increased. Because the amplifier is nonlinear, if the maximum (that is, the linear frequency range is as wide as possible) audio distortion is avoided as a key parameter of the amplifier, the amplifying circuit with good performance has strong loudspeaker control force on the loudspeaker, the loudspeaker can be better pushed, and the pushing capability of the existing amplifier on the loudspeaker is still insufficient.
SUMMERY OF THE UTILITY MODEL
In order to solve the above technical problem, the present invention provides a current amplifying circuit.
The utility model adopts the technical proposal that:
a current amplification circuit comprises a fifth bipolar transistor, a sixth bipolar transistor, a seventh bipolar transistor, an eighth bipolar transistor, a ninth bipolar transistor, a tenth bipolar transistor, an eleventh bipolar transistor, a twelfth bipolar transistor and a thirteenth bipolar transistor;
the base electrode of the sixth bipolar transistor is connected with the base electrode of the tenth bipolar transistor and is used as the input end of the current amplification circuit;
the emitter of the sixth bipolar transistor is connected with the emitter of the seventh bipolar transistor and is connected to a second bias voltage; an emitter of the tenth bipolar transistor is connected to an emitter of the eleventh bipolar transistor and to a first bias voltage; the base electrode of the seventh bipolar transistor is connected with the base electrode of the eleventh bipolar transistor and is connected to the output end of the current amplifying circuit;
a collector of the sixth bipolar transistor is connected with a base of the eighth bipolar transistor, a collector of the eighth bipolar transistor is connected with a base of the fifth bipolar transistor, and an emitter of the fifth bipolar transistor is connected to an output end of the current amplifying circuit; a collector of the tenth bipolar transistor is connected with a base of the twelfth bipolar transistor, a collector of the twelfth bipolar transistor is connected with a base of the thirteenth bipolar transistor, and an emitter of the thirteenth bipolar transistor is connected with an output end of the current amplifying circuit;
and the collector of the ninth bipolar transistor is connected with the collector of the eighth bipolar transistor, and the emitter of the ninth bipolar transistor is connected with the collector of the twelfth bipolar transistor.
Further, the circuit amplification circuit further comprises a first bipolar transistor, a second bipolar transistor, a third bipolar transistor, a fourth bipolar transistor, a fourteenth bipolar transistor, a fifteenth bipolar transistor, a sixteenth bipolar transistor and a seventeenth bipolar transistor;
the first bipolar transistor, the second bipolar transistor, the third bipolar transistor and the fourth bipolar transistor are connected in parallel, a base electrode of the first bipolar transistor is connected with an emitter electrode of the fifth bipolar transistor after the first bipolar transistor, the second bipolar transistor, the third bipolar transistor and the fourth bipolar transistor are connected in parallel, a collector electrode of the first bipolar transistor is connected to a first bias voltage after the first bipolar transistor is connected in parallel, and the emitter electrode of the first bipolar transistor is connected to the output end of the current amplification circuit after the first bipolar transistor and the second bipolar transistor are connected in parallel;
the fourteenth bipolar transistor, the fifteenth bipolar transistor, the sixteenth bipolar transistor and the seventeenth bipolar transistor are connected in parallel, a base electrode of the fourteenth bipolar transistor after the parallel connection is connected with an emitter electrode of the thirteenth bipolar transistor, a collector electrode of the thirteenth bipolar transistor after the parallel connection is connected to a second bias voltage, and the emitter electrode of the thirteenth bipolar transistor after the parallel connection is connected to an output end of the current amplification circuit.
Furthermore, the input end of the current amplifying circuit, the output end of the current amplifying circuit, the first bias voltage and the second bias voltage are all provided with filter circuits.
Further, the output end of the current amplification circuit is connected with an output stage circuit, and the output stage circuit comprises a plurality of chips of which the models are TDA 7293.
Further, the output stage circuit comprises three chips with the model number of TDA 7293.
The utility model has the advantages that: the utility model discloses a current amplification circuit adopts discrete difference input circuit final stage to push away and smooths the output circuit structure, adopts this kind of structure can be to reinforcing to loudspeaker control power, and the performance is relatively higher to big dynamic audio frequency simultaneously.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is an electronic circuit diagram of a current amplifying circuit according to an embodiment of the present invention;
fig. 2 is an electronic circuit diagram of an output stage circuit according to an embodiment of the present invention.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
As shown in fig. 1, the present embodiment provides a current amplification circuit including a fifth bipolar transistor Q5, a sixth bipolar transistor Q6, a seventh bipolar transistor Q7, an eighth bipolar transistor Q8, a ninth bipolar transistor Q9, a tenth bipolar transistor Q10, an eleventh bipolar transistor Q11, a twelfth bipolar transistor Q12, and a thirteenth bipolar transistor Q13;
the base of the sixth bipolar transistor Q6 is connected with the base of the tenth bipolar transistor Q10 and is used as the input end of the current amplifying circuit;
the emitter of the sixth bipolar transistor Q6 is connected to the emitter of the seventh bipolar transistor Q7 and is connected to the second bias voltage; the emitter of the tenth bipolar transistor Q10 is connected to the emitter of the eleventh bipolar transistor Q11 and is connected to the first bias voltage; the base of the seventh bipolar transistor Q7 is connected with the base of the eleventh bipolar transistor Q11 and is connected with the output end of the current amplifying circuit;
the collector of the sixth bipolar transistor Q6 is connected with the base of the eighth bipolar transistor Q8, the collector of the eighth bipolar transistor Q8 is connected with the base of the fifth bipolar transistor Q5, and the emitter of the fifth bipolar transistor Q5 is connected with the output end of the current amplifying circuit; the collector of the tenth bipolar transistor Q10 is connected with the base of the twelfth bipolar transistor Q12, the collector of the twelfth bipolar transistor Q12 is connected with the base of the thirteenth bipolar transistor Q13, and the emitter of the thirteenth bipolar transistor Q13 is connected to the output terminal of the current amplifying circuit;
the collector of the ninth bipolar transistor Q9 is connected to the collector of the eighth bipolar transistor Q8, and the emitter of the ninth bipolar transistor Q9 is connected to the collector of the twelfth bipolar transistor Q12.
In the embodiment, a structure of a final stage push output circuit of a discrete differential input circuit is adopted, which can obtain a large output range and keep linearity as much as possible within the range of required playing of sound so as to reduce distortion. In addition, the circuit structure can be used for hanging a large load, so that the control force on the loudspeaker is strong, and the large dynamic audio expression is relatively high. In the circuit of this embodiment, the sixth bipolar transistor Q6, the seventh bipolar transistor Q7, the tenth bipolar transistor Q10, and the eleventh bipolar transistor Q11 are used as differential inputs of the amplifier circuit, and the eighth bipolar transistor Q8, the fifth bipolar transistor Q5, the twelfth bipolar transistor Q12, and the thirteenth bipolar transistor Q13 are used as a combined two-stage amplifier, so that the gain can be increased.
Referring to fig. 1, as a further alternative embodiment, the circuit amplifying circuit further includes a first bipolar transistor Q1, a second bipolar transistor Q2, a third bipolar transistor Q3, a fourth bipolar transistor Q4, a fourteenth bipolar transistor Q14, a fifteenth bipolar transistor Q15, a sixteenth bipolar transistor Q16 and a seventeenth bipolar transistor Q17;
the first bipolar transistor Q1, the second bipolar transistor Q2, the third bipolar transistor Q3 and the fourth bipolar transistor Q4 are connected in parallel, the base electrodes of the parallel connected transistors are connected with the emitter electrode of the fifth bipolar transistor Q5, the collector electrodes of the parallel connected transistors are connected to a first bias voltage, and the emitter electrodes of the parallel connected transistors are connected to the output end of the current amplifying circuit;
and the fourteenth bipolar transistor Q14, the fifteenth bipolar transistor Q15, the sixteenth bipolar transistor Q16 and the seventeenth bipolar transistor Q17 are connected in parallel, the base electrodes of the parallel connected transistors are connected with the emitter electrode of the thirteenth bipolar transistor Q13, the collector electrodes of the parallel connected transistors are connected to the second bias voltage, and the emitter electrodes of the parallel connected transistors are connected to the output end of the current amplifying circuit.
The output end of the circuit is connected with a plurality of transistors in parallel, so that the output current is increased, the control force on the loudspeaker is increased, and the sound effect is greatly improved.
Referring to fig. 1, as a further alternative embodiment, a filter circuit is disposed on the input terminal of the current amplifying circuit, the output terminal of the current amplifying circuit, the first bias voltage, and the second bias voltage.
By adding a filter circuit in the circuit, interference signals from external voltage are reduced, and noise transfer between stages (input stage, amplification stage and output stage) in the circuit is reduced.
Referring to fig. 2, as a further alternative embodiment, the output end of the current amplifying circuit is connected with an output stage circuit, and the output stage circuit includes a plurality of chips with model number TDA 7293. The output stage circuit comprises three chips with the model number of TDA 7293.
TDA7293 is a product of European Italian electronics company, is an upgraded and updated product of TDA7294, adopts a high-power field effect tube for output, and meets the requirements of a fever partner on beautiful tone and high power. Some finished power amplifiers are internally provided with TDA7293 integrated blocks, have extremely high performance indexes, and have output power of 100W within the range of 20 Hz-20 kHz pause rate when the power supply voltage is +/-40 v and the load is 8 omega, but the harmonic distortion is only 0.005 percent, and the power amplifiers are in class A and class B amplification states. Three master-slave parallel working modes are adopted to enhance the control strength of the loudspeaker.
While the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention as defined by the appended claims.
Claims (5)
1. A current amplification circuit is characterized by comprising a fifth bipolar transistor, a sixth bipolar transistor, a seventh bipolar transistor, an eighth bipolar transistor, a ninth bipolar transistor, a tenth bipolar transistor, an eleventh bipolar transistor, a twelfth bipolar transistor and a thirteenth bipolar transistor;
the base electrode of the sixth bipolar transistor is connected with the base electrode of the tenth bipolar transistor and is used as the input end of the current amplification circuit;
the emitter of the sixth bipolar transistor is connected with the emitter of the seventh bipolar transistor and is connected to a second bias voltage; an emitter of the tenth bipolar transistor is connected to an emitter of the eleventh bipolar transistor and to a first bias voltage; the base electrode of the seventh bipolar transistor is connected with the base electrode of the eleventh bipolar transistor and is connected to the output end of the current amplifying circuit;
a collector of the sixth bipolar transistor is connected with a base of the eighth bipolar transistor, a collector of the eighth bipolar transistor is connected with a base of the fifth bipolar transistor, and an emitter of the fifth bipolar transistor is connected to an output end of the current amplifying circuit; a collector of the tenth bipolar transistor is connected with a base of the twelfth bipolar transistor, a collector of the twelfth bipolar transistor is connected with a base of the thirteenth bipolar transistor, and an emitter of the thirteenth bipolar transistor is connected with an output end of the current amplifying circuit;
and the collector of the ninth bipolar transistor is connected with the collector of the eighth bipolar transistor, and the emitter of the ninth bipolar transistor is connected with the collector of the twelfth bipolar transistor.
2. The current amplifying circuit according to claim 1, wherein the circuit amplifying circuit further comprises a first bipolar transistor, a second bipolar transistor, a third bipolar transistor, a fourth bipolar transistor, a fourteenth bipolar transistor, a fifteenth bipolar transistor, a sixteenth bipolar transistor and a seventeenth bipolar transistor;
the first bipolar transistor, the second bipolar transistor, the third bipolar transistor and the fourth bipolar transistor are connected in parallel, a base electrode of the first bipolar transistor is connected with an emitter electrode of the fifth bipolar transistor after the first bipolar transistor, the second bipolar transistor, the third bipolar transistor and the fourth bipolar transistor are connected in parallel, a collector electrode of the first bipolar transistor is connected to a first bias voltage after the first bipolar transistor is connected in parallel, and the emitter electrode of the first bipolar transistor is connected to the output end of the current amplification circuit after the first bipolar transistor and the second bipolar transistor are connected in parallel;
the fourteenth bipolar transistor, the fifteenth bipolar transistor, the sixteenth bipolar transistor and the seventeenth bipolar transistor are connected in parallel, a base electrode of the fourteenth bipolar transistor after the parallel connection is connected with an emitter electrode of the thirteenth bipolar transistor, a collector electrode of the thirteenth bipolar transistor after the parallel connection is connected to a second bias voltage, and the emitter electrode of the thirteenth bipolar transistor after the parallel connection is connected to an output end of the current amplification circuit.
3. The current amplifier circuit according to claim 1, wherein a filter circuit is disposed at the input terminal of the current amplifier circuit, the output terminal of the current amplifier circuit, the first bias voltage and the second bias voltage.
4. The current amplifying circuit according to claim 1, wherein an output stage circuit is connected to an output terminal of the current amplifying circuit, and the output stage circuit comprises a plurality of chips with model number TDA 7293.
5. The current amplifying circuit according to claim 4, wherein the output stage circuit comprises three chips of type TDA 7293.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022946612.3U CN214154458U (en) | 2020-12-10 | 2020-12-10 | Current amplifying circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022946612.3U CN214154458U (en) | 2020-12-10 | 2020-12-10 | Current amplifying circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214154458U true CN214154458U (en) | 2021-09-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022946612.3U Expired - Fee Related CN214154458U (en) | 2020-12-10 | 2020-12-10 | Current amplifying circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214154458U (en) |
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2020
- 2020-12-10 CN CN202022946612.3U patent/CN214154458U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210907 |