CN219553401U - Transformer frequency response correction circuit - Google Patents
Transformer frequency response correction circuit Download PDFInfo
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- CN219553401U CN219553401U CN202320651438.0U CN202320651438U CN219553401U CN 219553401 U CN219553401 U CN 219553401U CN 202320651438 U CN202320651438 U CN 202320651438U CN 219553401 U CN219553401 U CN 219553401U
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- amplifier
- audio signal
- resistor
- frequency response
- correction circuit
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Abstract
The utility model provides a transformer frequency response correction circuit which comprises an audio signal input end, an audio signal output end, a buffer amplifier unit and a frequency response correction circuit, wherein the buffer amplifier unit is electrically connected with the audio signal input end, the frequency response correction circuit is electrically connected with the buffer amplifier unit, the frequency response correction circuit is electrically connected with an output amplifier unit, and the output amplifier unit is electrically connected with an output transformer. The utility model can correct the frequency response of the compensation transformer to be straight, thereby improving the performance of the audio equipment.
Description
Technical Field
The utility model relates to the technical field of frequency response correction, in particular to a transformer frequency response correction circuit.
Background
Occasionally, there are applications in the audio circuit that require a transformer for output, but the frequency response of the transformer itself is not flat, which can cause the output frequency response of the audio device to be uneven, thereby affecting the performance of the audio device.
Disclosure of Invention
In view of the above, the present utility model provides a transformer frequency response correction circuit.
In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides a transformer frequency response correction circuit, includes audio signal input, audio signal output, buffer amplifier unit and frequency response correction circuit, the buffer amplifier unit with audio signal input electric connection, frequency response correction circuit and buffer amplifier electric connection, frequency response correction circuit electric connection has output amplifier unit, output amplifier unit electric connection has output transformer.
IN the present utility model, preferably, the buffer amplifier unit includes a first amplifier and a second amplifier, the audio signal input terminal includes an audio signal forward input terminal in+ and an audio signal reverse input terminal IN-, the input terminal of the first amplifier is connected to the audio signal forward input terminal in+, and the input terminal of the second amplifier is connected to the audio signal reverse input terminal IN-.
In the present utility model, preferably, the output amplifier unit includes a third amplifier and a fourth amplifier, and an output terminal of the third amplifier and an output terminal of the fourth amplifier are connected to the audio signal output terminal through an output transformer.
In the present utility model, preferably, the frequency response correction circuit includes a first resistor, a second resistor, and a third resistor connected in series between the first amplifier and the third amplifier, and a fourth resistor, a fifth resistor, and a sixth resistor connected in series between the second amplifier and the fourth amplifier, wherein the first resistor is connected to the fourth resistor through a first capacitor and a seventh resistor, the second resistor is connected to the fifth resistor through a second capacitor and an eighth resistor, and the third resistor is connected to the sixth resistor through a third capacitor.
In the present utility model, preferably, the audio signal output terminal includes an audio signal first output port out+ and an audio signal second output port OUT-.
The utility model has the advantages and positive effects that: the audio signal is input from the audio signal forward input end and the audio signal reverse input end, and after the audio signal is amplified by the first amplifier and the second amplifier in the buffer amplifier, the driving capability is improved, and the current and the voltage are amplified by setting the gains of the first amplifier and the second amplifier A2. The first resistor, the eighth resistor, the first capacitor and the third capacitor form a passive filter circuit, the frequency response characteristic of the output transformer is corrected and compensated in a targeted mode, then a third amplifier and a fourth amplifier are respectively input, the third amplifier and the fourth amplifier further amplify current to improve driving capacity and reduce output impedance of the circuit, the third amplifier and the fourth amplifier push-pull drive N1 windings of the output transformer, N2 windings and N3 windings of the output transformer obtain signals consistent with N1 through induction, and the N2 windings and the N3 windings are connected with a load through an audio signal output end. Through the mutual cooperation among the audio signal input end, the audio signal output end, the buffer amplifier unit and the frequency response correction circuit, the frequency response of the compensation transformer can be corrected to be straight, so that the performance of the audio equipment is improved.
Drawings
The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:
fig. 1 is a schematic diagram of a transformer frequency response correction circuit according to the present utility model.
In the figure: a1, a first amplifier; a2, a second amplifier; in+, audio signal positive input; IN-, audio signal inverting input; a3, a third amplifier; a4, a fourth amplifier; TR1, an output transformer; r1, a first resistor; r2, a second resistor; r3, a third resistor; r4, a fourth resistor; r5, a fifth resistor; r6, a sixth resistor; r7, a seventh resistor; r8, eighth resistor; c1, a first capacitor; c2, a second capacitor; c3, a third capacitor; out+, frequency signal first output port; OUT-, audio signal second output port.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1, the present utility model provides a transformer frequency response correction circuit, which includes an audio signal input end, an audio signal output end, a buffer amplifier unit and a frequency response correction circuit, wherein the buffer amplifier unit is electrically connected with the audio signal input end, the frequency response correction circuit is electrically connected with the buffer amplifier unit, the frequency response correction circuit is electrically connected with an output amplifier unit, and the output amplifier unit is electrically connected with an output transformer TR1.
IN this embodiment, further, the buffer amplifier unit includes a first amplifier A1 and a second amplifier A2, the audio signal input terminal includes an audio signal forward input terminal in+ and an audio signal reverse input terminal IN-, the input terminal of the first amplifier A1 is connected to the audio signal forward input terminal in+, and the input terminal of the second amplifier A2 is connected to the audio signal reverse input terminal IN-.
In this embodiment, further, the output amplifier unit includes a third amplifier A3 and a fourth amplifier A4, and the output terminal of the third amplifier A3 and the output terminal of the fourth amplifier A4 are connected to the audio signal output terminal through an output transformer TR1.
In this embodiment, the frequency response correction circuit further includes a first resistor R1, a second resistor R2, a third resistor R3 connected in series between the first amplifier A1 and the third amplifier A3, and a fourth resistor R4, a fifth resistor R5, and a sixth resistor R6 connected in series between the second amplifier A2 and the fourth amplifier A4, where the first resistor R1 is connected to the fourth resistor R4 through a first capacitor C1 and a seventh resistor R7, the second resistor R2 is connected to the fifth resistor R5 through a second capacitor C2 and an eighth resistor R8, and the third resistor R3 is connected to the sixth resistor R6 through a third capacitor C3.
In this embodiment, further, the audio signal output terminal includes an audio signal first output port out+ and an audio signal second output port OUT-.
The working principle and working process of the utility model are as follows: the audio signal input end comprises an audio signal forward input end IN+ and an audio signal reverse input end IN-, the audio signal output end comprises an audio signal first output port OUT+ and an audio signal second output port OUT-, and the audio signal is input from the audio signal forward input end IN+ and the audio signal reverse input end IN-and respectively amplified by a first amplifier A1 and a second amplifier A2 IN the buffer amplifier, so that the driving capability is improved, and the current and the voltage can be amplified by setting the gains of the first amplifier A1 and the second amplifier A2 according to the product gain requirement. The first resistor R1 to the eighth resistor R8, the first capacitor C1 to the third capacitor C3 form a passive filter circuit, the passive filter circuit is used for carrying OUT targeted correction and compensation on the frequency response characteristic of the output transformer, then the passive filter circuit is respectively input into the third amplifier A3 and the fourth amplifier A4, the third amplifier A3 and the fourth amplifier A4 further amplify currents to improve driving capability and reduce output impedance of the circuit, the third amplifier A3 and the fourth amplifier A4 push-pull drive the N1 winding of the output transformer TR1, and the N2 winding and the N3 winding of the output transformer TR1 obtain signals consistent with the N1 through induction and are connected with loads through a first output port OUT+ of an audio signal and a second output port OUT-port of the audio signal. The first to fourth amplifiers A1 to A4 are configured as amplifiers capable of realizing an amplifying function, the first amplifier A1 and the second amplifier A2 are identical in structure, and the third amplifier A3 and the fourth amplifier A4 are identical in structure. The utility model provides a circuit capable of correcting the frequency response of a transformer, which can correct the frequency response of a compensation transformer to be straight through the mutual matching among an audio signal input end, an audio signal output end, a buffer amplifier unit and a frequency response correction circuit, thereby improving the performance of audio equipment.
The foregoing describes the embodiments of the present utility model in detail, but the description is only a preferred embodiment of the present utility model and should not be construed as limiting the scope of the utility model. All equivalent changes and modifications within the scope of the present utility model are intended to be covered by this patent.
Claims (5)
1. The utility model provides a transformer frequency response correction circuit which characterized in that includes audio signal input, audio signal output, buffer amplifier unit and frequency response correction circuit, buffer amplifier unit with audio signal input electric connection, frequency response correction circuit with buffer amplifier unit electric connection, frequency response correction circuit electric connection has output amplifier unit, output amplifier unit electric connection has output transformer.
2. A transformer frequency response correction circuit according to claim 1, characterized IN that the buffer amplifier unit comprises a first amplifier and a second amplifier, the audio signal input comprising an audio signal forward input in+ and an audio signal reverse input IN-, the input of the first amplifier being connected to the audio signal forward input in+, the input of the second amplifier being connected to the audio signal reverse input IN ".
3. The transformer frequency response correction circuit according to claim 2, wherein the output amplifier unit includes a third amplifier and a fourth amplifier, and the output terminal of the third amplifier and the output terminal of the fourth amplifier are connected to the audio signal output terminal through the output transformer.
4. A transformer frequency response correction circuit according to claim 3, wherein the frequency response correction circuit comprises a first resistor, a second resistor, a third resistor connected in series between the first amplifier and the third amplifier, and a fourth resistor, a fifth resistor, and a sixth resistor connected in series between the second amplifier and the fourth amplifier, the first resistor being connected to the fourth resistor through a first capacitor, a seventh resistor, the second resistor being connected to the fifth resistor through a second capacitor, an eighth resistor, and the third resistor being connected to the sixth resistor through a third capacitor.
5. The transformer frequency response correction circuit of claim 1, wherein the audio signal output comprises an audio signal first output port out+ and an audio signal second output port OUT-.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320651438.0U CN219553401U (en) | 2023-03-28 | 2023-03-28 | Transformer frequency response correction circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320651438.0U CN219553401U (en) | 2023-03-28 | 2023-03-28 | Transformer frequency response correction circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219553401U true CN219553401U (en) | 2023-08-18 |
Family
ID=87729317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320651438.0U Active CN219553401U (en) | 2023-03-28 | 2023-03-28 | Transformer frequency response correction circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219553401U (en) |
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2023
- 2023-03-28 CN CN202320651438.0U patent/CN219553401U/en active Active
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