CN214707524U - Power supply noise reduction circuit - Google Patents
Power supply noise reduction circuit Download PDFInfo
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- CN214707524U CN214707524U CN202121062943.9U CN202121062943U CN214707524U CN 214707524 U CN214707524 U CN 214707524U CN 202121062943 U CN202121062943 U CN 202121062943U CN 214707524 U CN214707524 U CN 214707524U
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Abstract
The utility model discloses a circuit of making an uproar falls in power, relate to the technical field of making an uproar falls in the power, including transformer T1, diode D1, zener diode D2, diode D3, resistance R1, resistance R2, the filter unit, first AC feedback network, second AC feedback network, third AC feedback network, transformer T1's primary coil is used for the electric power, the mains after transformer T1's secondary coil transform is by first AC feedback network, second AC feedback network, third AC feedback network makes an uproar fall step by step, carry out the high frequency filtering through the filter unit and supply power to electrical apparatus, first AC feedback network, second AC feedback network, third AC feedback network carries out the pulse absorption, so that the pulse interference amplitude reduces, improve noise interference.
Description
Technical Field
The utility model belongs to the technical field of the power noise reduction technique and specifically relates to a circuit of making an uproar falls in power is related to.
Background
When the electrical appliance is used, alternating current is generally required to be converted into direct current for use, and in order to achieve the purpose, a designer often uses a switching power supply in a circuit when the alternating current/direct current conversion is carried out, so that the pulse interference of a power supply for the electrical appliance is large, when the electrical appliance is a loudspeaker, a computer, a television and other equipment with a power amplification function, the pulse interference is large, the power amplification of the equipment can generate large noise, and the user experience feeling is low. Therefore, utility model people utility model relates to a circuit of making an uproar falls in power for after the power carries out interchange/direct current conversion, so that the pulse interference amplitude reduces, and then improves noise interference.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an it is not enough to overcome above-mentioned condition, aims at providing the technical scheme that can solve above-mentioned problem.
A power supply noise reduction circuit comprises a transformer T1, a diode D1, a voltage stabilizing diode D2, a diode D3, a resistor R1, a resistor R2, a filtering unit, a first alternating current feedback network, a second alternating current feedback network and a third alternating current feedback network; one end of a secondary coil of the transformer T1 is connected with the input end of the diode D1, the other end of the secondary coil of the transformer T1 is grounded, and the output end of the diode D1 is grounded through a resistor R1 and a voltage stabilizing diode D2; one end of the resistor R2 is connected with the output end of the diode D1, the other end of the resistor R2 is connected with the input end of the diode D3, and the output end of the diode D3 is grounded through a voltage stabilizing diode D2; the input end of the filtering unit is connected with the output end of the diode D1, and the output end of the filtering unit supplies power to the electrical appliance.
As a further aspect of the present invention: the first alternating current feedback network comprises a capacitor C7 and a resistor R7, one end of the capacitor C7 is connected with the input end of a diode D1, and the other end of the capacitor C7 is connected with the input end of a diode D3 through a resistor R7.
As a further aspect of the present invention: the second alternating current feedback network comprises a resistor R9, a capacitor C9 and a capacitor C10, one end of the capacitor C9 is connected with the output end of the diode D3 through a resistor R9, the other end of the capacitor C9 is grounded through a voltage stabilizing diode D2, one end of the capacitor C10 is connected with the output end of the diode D3, and the other end of the capacitor C10 is grounded through a voltage stabilizing diode D2.
As a further aspect of the present invention: the third alternating current feedback network comprises a point capacitor C8 and a resistor R8, one end of the resistor R8 is connected with the output end of the diode D1 through the capacitor C8, and the other end of the resistor R8 is grounded through a voltage stabilizing diode D2.
As a further aspect of the present invention: the filtering unit comprises a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, an inductor L1, an inductor L2 and an inductor L3; one end of the capacitor C1, the capacitor C2 and the capacitor C3 which are connected in parallel is connected with the output end of the diode D1, and the other end of the capacitor C1, the capacitor C2 and the capacitor C3 which are connected in parallel is grounded; one end of an inductor L2 is connected with the positive end of the electrical appliance, the other end of the inductor L2 is connected with the output end of a diode D1 through an inductor L1, one end of a capacitor C4 is connected with the output end of a diode D1 through an inductor L1, and the other end of the capacitor C4 is grounded.
Compared with the prior art, the beneficial effects of the utility model are that: the primary coil of the transformer T1 is used for obtaining electricity, the power supply converted by the secondary coil of the transformer T1 is subjected to noise reduction step by the first alternating current feedback network, the second alternating current feedback network and the third alternating current feedback network, power is supplied to an electric appliance after high-frequency filtering is carried out on the power supply by the filtering unit, and the first alternating current feedback network, the second alternating current feedback network and the third alternating current feedback network carry out pulse absorption so as to reduce the pulse interference amplitude and improve the noise interference; when the electrical appliance is a device with a power amplification function such as a loudspeaker, a computer, a television and the like, the power supply noise reduction circuit can absorb power supply pulse of the electrical appliance supplied by a power supply so as to reduce power supply pulse interference to the electrical appliance, avoid the electrical appliance from emitting larger noise, and achieve better experience feeling.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a circuit diagram of the present invention.
Fig. 3 is a schematic diagram of the framework of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be understood that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-3, in an embodiment of the present invention, a power supply noise reduction circuit includes a transformer T1, a diode D1, a zener diode D2, a diode D3, a resistor R1, a resistor R2, a filter unit, a first ac feedback network, a second ac feedback network, and a third ac feedback network. One end of the secondary coil of the transformer T1 is connected with the input end of the diode D1, the other end of the secondary coil of the transformer T1 is grounded, and the output end of the diode D1 is grounded through a resistor R1 and a voltage stabilizing diode D2. One end of the resistor R2 is connected with the output end of the diode D1, the other end of the resistor R2 is connected with the input end of the diode D3, and the output end of the diode D3 is grounded through the zener diode D2. The first alternating current feedback network comprises a capacitor C7 and a resistor R7, one end of the capacitor C7 is connected with the input end of a diode D1, and the other end of the capacitor C7 is connected with the input end of a diode D3 through a resistor R7. The second alternating current feedback network comprises a resistor R9, a capacitor C9 and a capacitor C10, one end of the capacitor C9 is connected with the output end of the diode D3 through a resistor R9, the other end of the capacitor C9 is grounded through a voltage stabilizing diode D2, one end of the capacitor C10 is connected with the output end of the diode D3, and the other end of the capacitor C10 is grounded through a voltage stabilizing diode D2. The third alternating current feedback network comprises a point capacitor C8 and a resistor R8, one end of the resistor R8 is connected with the output end of the diode D1 through the capacitor C8, and the other end of the resistor R8 is grounded through a voltage stabilizing diode D2. The input end of the filtering unit is connected with the output end of the diode D1, and the output end of the filtering unit supplies power to the electrical appliance. The primary coil of the transformer T1 is used for obtaining electricity, the power supply converted by the secondary coil of the transformer T1 is subjected to noise reduction step by the first alternating current feedback network, the second alternating current feedback network and the third alternating current feedback network, power is supplied to an electric appliance after high-frequency filtering is carried out on the power supply through the filtering unit, and the first alternating current feedback network, the second alternating current feedback network and the third alternating current feedback network carry out pulse absorption so that the pulse interference amplitude is reduced and the noise interference is improved. When the electrical appliance is a device with a power amplification function such as a loudspeaker, a computer, a television and the like, the power supply noise reduction circuit can absorb power supply pulse of the electrical appliance supplied by a power supply so as to reduce power supply pulse interference to the electrical appliance, avoid the electrical appliance from emitting larger noise, and achieve better experience feeling.
Preferably, the filtering unit includes a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, an inductor L1, an inductor L2, and an inductor L3. One end of the capacitor C1, the capacitor C2 and the capacitor C3 which are connected in parallel is connected with the output end of the diode D1, and the other end of the capacitor C1, the capacitor C2 and the capacitor C3 which are connected in parallel is grounded. One end of an inductor L2 is connected with the positive end of the electrical appliance, the other end of the inductor L2 is connected with the output end of a diode D1 through an inductor L1, one end of a capacitor C4 is connected with the output end of a diode D1 through an inductor L1, and the other end of the capacitor C4 is grounded. The plurality of capacitors are connected in parallel, so that the equivalent impedance of the capacitors is reduced, the service life of the capacitors is prolonged, the reliability of the filtering unit is improved, and the filtering effect is improved.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (5)
1. A power supply noise reduction circuit is characterized by comprising a transformer T1, a diode D1, a voltage stabilizing diode D2, a diode D3, a resistor R1, a resistor R2, a filtering unit, a first alternating current feedback network, a second alternating current feedback network and a third alternating current feedback network;
one end of a secondary coil of the transformer T1 is connected with the input end of the diode D1, the other end of the secondary coil of the transformer T1 is grounded, and the output end of the diode D1 is grounded through a resistor R1 and a voltage stabilizing diode D2;
one end of the resistor R2 is connected with the output end of the diode D1, the other end of the resistor R2 is connected with the input end of the diode D3, and the output end of the diode D3 is grounded through a voltage stabilizing diode D2;
the input end of the filtering unit is connected with the output end of the diode D1, and the output end of the filtering unit supplies power to the electrical appliance.
2. The power supply noise reduction circuit according to claim 1, wherein the first ac feedback network comprises a capacitor C7 and a resistor R7, one end of the capacitor C7 is connected to the input terminal of a diode D1, and the other end of the capacitor C7 is connected to the input terminal of a diode D3 through a resistor R7.
3. The power supply noise reduction circuit according to claim 1, wherein the second ac feedback network comprises a resistor R9, a capacitor C9, and a capacitor C10, one end of the capacitor C9 is connected to the output terminal of the diode D3 through the resistor R9, the other end of the capacitor C9 is connected to the ground through the zener diode D2, one end of the capacitor C10 is connected to the output terminal of the diode D3, and the other end of the capacitor C10 is connected to the ground through the zener diode D2.
4. The power supply noise reduction circuit according to claim 1, wherein the third ac feedback network comprises a point capacitor C8 and a resistor R8, one end of the resistor R8 is connected to the output end of the diode D1 through the capacitor C8, and the other end of the resistor R8 is grounded through a zener diode D2.
5. The power supply noise reduction circuit according to any one of claims 2 to 4, wherein the filter unit comprises a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, an inductor L1, an inductor L2, an inductor L3;
one end of the capacitor C1, the capacitor C2 and the capacitor C3 which are connected in parallel is connected with the output end of the diode D1, and the other end of the capacitor C1, the capacitor C2 and the capacitor C3 which are connected in parallel is grounded;
one end of an inductor L2 is connected with the positive end of the electrical appliance, the other end of the inductor L2 is connected with the output end of a diode D1 through an inductor L1, one end of a capacitor C4 is connected with the output end of a diode D1 through an inductor L1, and the other end of the capacitor C4 is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121062943.9U CN214707524U (en) | 2021-05-18 | 2021-05-18 | Power supply noise reduction circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121062943.9U CN214707524U (en) | 2021-05-18 | 2021-05-18 | Power supply noise reduction circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214707524U true CN214707524U (en) | 2021-11-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121062943.9U Active CN214707524U (en) | 2021-05-18 | 2021-05-18 | Power supply noise reduction circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214707524U (en) |
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2021
- 2021-05-18 CN CN202121062943.9U patent/CN214707524U/en active Active
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