CN105306636B - Method, circuit and system for improving power supply noise - Google Patents
Method, circuit and system for improving power supply noise Download PDFInfo
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- CN105306636B CN105306636B CN201510726566.7A CN201510726566A CN105306636B CN 105306636 B CN105306636 B CN 105306636B CN 201510726566 A CN201510726566 A CN 201510726566A CN 105306636 B CN105306636 B CN 105306636B
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Abstract
The invention discloses a method, a circuit and a system for improving power supply noise, and belongs to the technical field of wireless communication. The circuit comprises a voltage source output circuit, a first noise reduction circuit, a second noise reduction circuit, a third noise reduction circuit and a load circuit. And parameters of the voltage source output circuit, the first noise reduction circuit, the second noise reduction circuit, the third noise reduction circuit and the load circuit are obtained by classification processing and calculation according to the function processing tool. Therefore, the power supply noise is effectively inhibited by the least number of elements and reasonable value, the material cost of the product is saved, and the product performance and the user experience are improved. Therefore, the power supply noise is effectively inhibited by the least number of elements and reasonable value, the material cost of the product is saved, and the product performance and the user experience are improved.
Description
Technical Field
The present invention relates to the field of wireless communications technologies, and in particular, to a method, a circuit, and a system for improving power supply noise of a mobile terminal.
Background
With the wide development of mobile terminals such as mobile phones and the like, functional modules are increasing continuously, and the rapid development of the mobile terminals makes the stability of the direct-current power supply thereof gradually become the bottleneck of the development of the mobile communication field. How to achieve more and more high integration requirements with limited design space is a problem that needs to be solved currently, and the problem of power supply noise needs to be solved first. The existing methods for suppressing power supply noise include the following two methods:
firstly, an energy storage capacitor and a decoupling circuit are added at a direct-current voltage source end;
secondly, a decoupling capacitor is added at the load end, and the printed circuit is designed to be a laminated layer so as to achieve the effect of noise suppression.
However, the two prior art methods cannot accurately calculate the capacitance value and the capacitance number, so that the product cost is too high, and the noise suppression effect is not significant.
Therefore, it is desirable to provide a method, a circuit and a system for improving power noise of a mobile terminal, which avoid the above situation and improve user experience.
Disclosure of Invention
The invention mainly aims to provide a method, a circuit and a system for improving power supply noise of a mobile terminal, aiming at solving the problems of high cost and high significance caused by the fact that parameters and quantity of passive elements cannot be accurately calculated in the prior art.
In order to achieve the above object, the present invention provides a circuit for improving power supply noise, which includes a voltage source output circuit, a first noise reduction circuit, a second noise reduction circuit, a third noise reduction circuit, and a load circuit, where parameters of the voltage source output circuit, the first noise reduction circuit, the second noise reduction circuit, the third noise reduction circuit, and the load circuit are obtained by performing classification processing and calculation according to a function class processing tool, where the voltage source output circuit is configured to provide a voltage source signal, and the voltage source signal includes a useful power supply signal and power supply noise; the first end of the first noise reduction circuit is connected with the voltage source output circuit and used for receiving and processing low-frequency power supply noise; the first end of the second noise reduction circuit is connected with the second end of the first noise reduction circuit and used for receiving and processing high-frequency power supply noise; and the first end of the third noise reduction circuit is connected with the second end of the second noise reduction circuit and is used for receiving and processing low-frequency power supply noise which is not filtered by the first noise reduction circuit and high-frequency power supply noise which is not filtered by the second noise reduction circuit and receiving and processing noise of a load power supply. The load circuit is connected with the second end of the third noise reduction circuit and is used for receiving the useful power supply signal filtered by the first noise reduction circuit, the second noise reduction circuit and the third noise reduction circuit.
Optionally, the voltage source output circuit includes a first resistor, a first inductor, and a first capacitor, a first end of the first resistor is connected to the output end of the voltage source, a second end of the first resistor is connected to the first end of the first inductor, a second end of the first inductor is connected to the first end of the first capacitor, and a second end of the first capacitor is grounded.
Optionally, the first noise reduction circuit includes a plurality of first branches, each first branch includes a second resistor, a second inductor, and a second capacitor, a first end of the second resistor is connected to the voltage source output circuit, a second end of the second resistor is connected to a first end of the second inductor, a second end of the second inductor is connected to a first end of the second capacitor, and a second end of the second capacitor is grounded.
Optionally, the second noise reduction circuit includes a third resistor, a third inductor, and a third capacitor, a first end of the third resistor is connected to the first noise reduction circuit, a second end of the third resistor is connected to a first end of the third inductor, a second end of the third inductor is connected to a first end of the third capacitor, and a second end of the third capacitor is grounded.
Optionally, the third noise reduction circuit includes a plurality of second branches, each second branch includes a fourth resistor, a fourth inductor, and a fourth capacitor, a first end of the fourth resistor is connected to the second noise reduction circuit, a second end of the fourth resistor is connected to a first end of the fourth inductor, a second end of the fourth inductor is connected to a first end of the fourth capacitor, and a second end of the fourth capacitor is grounded.
Optionally, the load circuit includes a fifth resistor, a fifth inductor, and a fifth capacitor, a first end of the fifth resistor is connected to the third noise reduction circuit, a second end of the fifth resistor is connected to a first end of the fifth inductor, a second end of the fifth inductor is connected to a first end of the fifth capacitor, and a second end of the fifth capacitor is grounded.
In addition, to achieve the above object, the present invention also provides a method of improving power supply noise, the method including: inputting element parameters; judging whether the element parameters meet the preset power supply noise specification requirements or not; and when the element parameters meet the preset power supply noise specification requirement, obtaining circuit parameters, wherein the circuit parameters comprise element values and element quantity.
Optionally, before the determining whether the component parameter meets a preset power supply noise specification requirement, the method further includes: calling a formula of a function library, and calculating the element parameters; and outputting form and chart data corresponding to the classification processing result of the element parameters.
Optionally, the method further comprises: and inputting the circuit parameters into a circuit template to obtain a circuit for improving the power supply noise.
In addition, in order to achieve the above object, the present invention further provides a system for improving power supply noise, including a circuit for improving power supply noise, a voltage source, a circuit improving device and a load device, where the voltage source provides a voltage source for the circuit and is electrically connected to the load device through the circuit, a component parameter is input into the circuit improving device, and when the circuit improving device determines that the component parameter meets a preset power supply noise specification requirement, the circuit parameter is obtained, and the circuit parameter includes a component value and a component number.
According to the method, the circuit and the system for improving the power supply noise, parameters of the voltage source output circuit, the first noise reduction circuit, the second noise reduction circuit, the third noise reduction circuit and the load circuit are classified and calculated through the function processing tool, so that the power supply noise is effectively inhibited by the least number of elements and reasonable values, and the method, the circuit and the system have the effects of saving the product material cost and improving the product performance and the user experience.
Drawings
FIG. 1 is a system block diagram of an improved power supply noise implementation of various embodiments of the present invention;
FIG. 2 is a circuit diagram of the power supply noise reduction circuit according to the preferred embodiment of the present invention;
FIG. 3 is a circuit diagram of a voltage source output circuit according to a preferred embodiment of the present invention;
FIG. 4 is a circuit diagram of a first noise reduction circuit according to a preferred embodiment of the present invention;
FIG. 5 is a circuit diagram of a second noise reduction circuit according to a preferred embodiment of the present invention;
FIG. 6 is a circuit diagram of a third noise reduction circuit according to a preferred embodiment of the present invention;
FIG. 7 is a circuit diagram of a load circuit according to a preferred embodiment of the present invention;
FIG. 8 is a block diagram of an apparatus for improving power supply noise according to a preferred embodiment of the present invention;
fig. 9 is a flowchart illustrating a method for improving power supply noise according to a preferred embodiment of the invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
A mobile terminal implementing various embodiments of the present invention will now be described with reference to the accompanying drawings. In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for facilitating the explanation of the present invention, and have no specific meaning in themselves. Thus, "module" and "component" may be used in a mixture.
The mobile terminal may be implemented in various forms. For example, the terminal described in the present invention may include a mobile terminal such as a mobile phone, a smart phone, a notebook computer, a digital broadcast receiver, a PDA (personal digital assistant), a PAD (tablet computer), a PMP (portable multimedia player), a navigation device, and the like, and a stationary terminal such as a digital TV, a desktop computer, and the like. In the following, it is assumed that the terminal is a mobile terminal. However, it will be understood by those skilled in the art that the configuration according to the embodiment of the present invention can be applied to a fixed type terminal in addition to elements particularly used for moving purposes.
Fig. 1 is a block diagram of a system for improving power supply noise according to various embodiments of the present invention. The system for improving power supply noise includes a voltage source 100, a circuit 200 for improving power supply noise, a load device 300, and a circuit improving device 400.
The voltage source 100 provides a voltage source for the circuit 200 for improving power noise, and the voltage source 100 is electrically connected to the load device 300 through the circuit 200 for improving power noise. The power supply noise reduction circuit 200 receives and processes power supply noise generated by a voltage source to deliver a filtered utility power signal to the load device 300. The circuit improvement device 400 estimates the values of the components and the number of the components in the circuit 200 for improving the power supply noise, so that the circuit with the least number of components, the optimized power supply channel area and the smallest volume can realize the optimal noise reduction effect, maximally save the design space and maximally reduce the product cost.
Based on the above system for improving power supply noise, various embodiments of the method of the present invention are provided.
Fig. 2 is a circuit diagram for improving power supply noise according to the preferred embodiment of the present invention. The circuit 200 includes a voltage source output circuit 210, a first noise reduction circuit 220, a second noise reduction circuit 230, a third noise reduction circuit 240, and a load circuit 250. The parameters of the voltage source output circuit 210, the first noise reduction circuit 220, the second noise reduction circuit 230, the third noise reduction circuit 240 and the load circuit 250 in this embodiment are classified and calculated according to the function class processing tool.
The voltage source output circuit 210 receives a voltage source signal output by the voltage source 100, wherein the voltage source signal includes a useful power signal and power noise.
The first end of the first noise reduction circuit 220 is electrically connected to the voltage source output circuit 210 for receiving and processing the low frequency power noise in the power noise.
Specifically, the first noise reduction circuit 220 includes a plurality of passive components stacked on top of each other according to a predetermined or/and conventional circuit layout to filter low frequency power noise. In the present embodiment, the passive components include, but are not limited to, resistors, inductors, capacitors, passive filters, and the like.
The first terminal of the second noise reduction circuit 230 is connected to the second terminal of the first noise reduction circuit 220 to receive and process the high frequency power supply noise.
Specifically, the second noise reduction circuit 230 includes a plurality of loop elements stacked on top of each other according to a predetermined or/and usual circuit layout to filter the high frequency power noise. In the present embodiment, the passive components include, but are not limited to, circuit traces, circuit board materials, holes, and the like.
A first terminal of the third noise reduction circuit 240 is connected to a second terminal of the second noise reduction circuit 230 to receive and process low frequency power noise unfiltered by the first noise reduction circuit 220 and high frequency power noise unfiltered by the second noise reduction circuit 230 and to receive and process noise of the load power.
Specifically, the third noise reduction circuit 240 may filter both low-frequency power supply noise and high-frequency power supply noise, and may also filter noise of the load power supply, so as to further filter power supply noise of the voltage source that is not filtered by the first noise reduction circuit 220 and the second noise reduction circuit 230, and filter noise generated by the load power supply, thereby playing a role in effectively suppressing power supply noise.
A load circuit 250 is connected to a second terminal of the third noise reduction circuit 240 for receiving the desired power signal filtered out via the first noise reduction circuit 220, the second noise reduction circuit 230 and the third noise reduction circuit 240.
It can be understood by those skilled in the art that the number and values of the passive elements and the loop elements in the circuit 200 for improving power supply noise in the present embodiment are not particularly limited, and are determined according to the actual voltage source and the expected specification requirement.
In other embodiments, the values, the numbers and the building manners of the circuit elements in the voltage source output circuit 210, the first noise reduction circuit 220, the second noise reduction circuit 230, the third noise reduction circuit 240 and the load circuit 250 may be changed accordingly according to different parameters calculated by the function class processing tool.
Fig. 3 is a circuit diagram of a voltage source output circuit according to a preferred embodiment of the invention. In this embodiment, the voltage source output circuit 210 includes a first resistor R1, a first inductor L1, and a first capacitor C1. A first terminal of the first resistor R1 is connected to the output terminal of the voltage source 100, a second terminal of the first resistor R1 is connected to a first terminal of the first inductor L1, a second terminal of the first inductor L1 is connected to a first terminal of the first capacitor C1, and a second terminal of the first capacitor C1 is grounded.
Fig. 4 is a circuit diagram of a first noise reduction circuit according to a preferred embodiment of the invention. In this embodiment, the first noise reduction circuit 220 includes X first branches, each of which includes the second resistor R2, the second inductor L2, and the second capacitor C2. A first end of the second resistor R2 is used as an input end of the first noise reduction circuit 220 and is connected to the voltage source output circuit 210, a second end of the second resistor R2 is connected to a first end of the second inductor L2, a second end of the second inductor L2 is connected to a first end of the second capacitor C2, and a second end of the second capacitor C2 is grounded. The low frequency noise signal input from the voltage source 100 may be filtered through the above connection.
Fig. 5 is a circuit diagram of a second noise reduction circuit according to a preferred embodiment of the invention. In this embodiment, the second noise reduction circuit 230 includes a third resistor R3, a third inductor L3, and a third capacitor C3. A first terminal of the third resistor R3 is used as an input terminal of the second noise reduction circuit 230 and is connected to the first noise reduction circuit 220, a second terminal of the third resistor R3 is connected to a first terminal of a third inductor L3, a second terminal of the third inductor L3 is connected to a first terminal of a third capacitor C3, and a second terminal of the third capacitor C3 is grounded. The high frequency noise signal input from the voltage source 100 may be filtered through the above connection.
Fig. 6 is a circuit diagram of a third noise reduction circuit according to a preferred embodiment of the invention. In this embodiment, the third noise reduction circuit 240 includes Y second branches, each of which includes a fourth resistor R4, a fourth inductor L4, and a fourth capacitor C4. A first terminal of the fourth resistor R4 is used as an input terminal of the third noise reduction circuit 240 and is connected to the second noise reduction circuit 230, a second terminal of the fourth resistor R4 is connected to a first terminal of a fourth inductor L4, a second terminal of the fourth inductor L4 is connected to a first terminal of a fourth capacitor C4, and a second terminal of the fourth capacitor C4 is grounded. The high frequency noise signal and the low frequency noise signal inputted from the voltage source 100 and the noise signal sum generated from the load power source may be filtered through the above-mentioned connections.
Fig. 7 is a circuit diagram of a load circuit according to a preferred embodiment of the invention. In the present embodiment, the load circuit 250 includes a fifth resistor R5, a fifth inductor L5, and a fifth capacitor C5. A first terminal of the fifth resistor R5 is connected to the third noise reduction circuit 240 as an input terminal, a second terminal of the fifth resistor R5 is connected to a first terminal of a fifth inductor L5, a second terminal of the fifth inductor L5 is connected to a first terminal of a fifth capacitor C5, and a second terminal of the fifth capacitor C5 is grounded.
Fig. 8 is a block diagram of an apparatus for improving power supply noise according to a preferred embodiment of the present invention. The apparatus 400 comprises:
an input module 810 for inputting component parameters.
Specifically, a parametric design interactive interface is entered and a database is built that determines parameters that may be used in designing the circuit by using a common or special application of the stack and dc or/and voltage source schemes, such as: the wiring, material, punching position, parameters of passive element, etc. The passive element includes, but is not limited to, a resistor, an inductor, a capacitor, a passive filter, and the like. The parameters include values, quantities, and the like.
Further, the parameters are classified by the function class processing tool and stored in the position of the function library in the corresponding tool.
And entering a user input interface and inputting element parameters through the interface. The element parameters refer to the estimated parameters of any one or more elements in the system.
And the calling module 820 is used for calling the formula of the function library and calculating the element parameters.
Specifically, after the element parameters of the element are input, a function library in the tool is called, and the element parameters are calculated by using a suitable formula. The principle of function library calculation is to perform accurate analysis on the power supply loop and the passive elements according to the power supply network distribution theory, improve the power supply noise of the whole channel by the minimum power supply channel area and the minimum number of the passive elements, and meet the requirement of the optimal power supply noise, so that the cost and the risk are reduced to the maximum extent on the premise of effectively achieving the optimal performance.
Further, the compilation of the library of functions may be established using various programming languages or directly using any data processing software.
And a data output module 830, configured to output form and diagram data corresponding to the classification processing result of the component parameter.
Specifically, after the analysis is performed by the function library, the form and the chart data corresponding to the classification processing result of the element parameter are output.
The determining module 840 is configured to determine whether the component parameter meets a preset power supply noise specification requirement.
Specifically, whether the specification requirements of one or the combination of the alternating current loop impedance and the loop total power supply noise are met is judged according to the form and the chart data.
And a parameter obtaining module 850, configured to obtain a circuit parameter when the component parameter meets a preset power supply noise specification requirement, where the circuit parameter includes a component value and a component number.
Specifically, when the component parameters meet the preset power supply noise specification requirement, the parameter obtaining module 850 obtains parameter information of each component of the voltage source output circuit 210, the first noise reduction circuit 220, the second noise reduction circuit 230, the third noise reduction circuit 240, and the load circuit 250, so as to obtain the circuit parameters of the circuit 200.
And a circuit obtaining module 860, configured to input the circuit parameter into a circuit template to obtain a circuit for improving power supply noise.
Specifically, after the circuit parameters are obtained, the circuit parameters are input into the circuit templates of fig. 2-7, thereby obtaining a complete circuit capable of improving power supply noise.
Further, part of the passive element parameters in the circuit can be converted into the printed circuit path parameters through the interaction of the function library.
In other embodiments, the component parameter input through the input module 810 may also be a parameter of a voltage source, the voltage source parameter is calculated through the retrieving module 820 to obtain an estimated component parameter, the estimated component parameter is input through the input module 810, and the retrieving module 820 and the data output module 830 retrieve a formula to calculate corresponding form and diagram data. Therefore, the numerical values of all the elements obtained by calculation are more accurate.
The circuit for improving the power supply noise calculated by the device 400 for improving the power supply noise can reduce the volume of the circuit in a product to the greatest extent by the least number of elements, reasonable values and the smallest power supply path area, and has the effect of saving the cost of product materials. Meanwhile, more spaces are reserved for other parts, so that the overall performance of the product is improved, and the user experience is improved. For example, for a battery, increasing the separation distance between components helps to improve the stability of the battery; the sensitivity of the antenna is improved by the suppressed power supply noise of the isolation area of the antenna; the noise immunity of the camera is improved by the suppressed power supply noise of the isolation area of the camera.
Fig. 9 is a flowchart illustrating a method for improving power supply noise according to another preferred embodiment of the invention. The method comprises the following steps:
and S910, inputting element parameters.
Specifically, a parametric design interactive interface is entered and a database is built that determines parameters that may be used in designing the circuit by using a common or special application of the stack and dc or/and voltage source schemes, such as: the wiring, material, punching position, parameters of passive element, etc. The passive element includes, but is not limited to, a resistor, an inductor, a capacitor, a passive filter, and the like. The parameters include values, quantities, and the like.
Further, the parameters are classified by the function class processing tool and stored in the position of the function library in the corresponding tool.
And entering a user input interface and inputting element parameters through the interface. The element parameters refer to the estimated parameters of any one or more elements in the system.
Further, in other embodiments, S910 further includes, before the step of:
s901, inputting voltage source parameters;
s902, a formula of a function library is called, and the voltage source parameters are calculated to obtain estimated element parameters. Therefore, the numerical values of all the elements obtained by calculation are more accurate.
And S920, calling a formula of the function library, and calculating the element parameters.
Specifically, after the element parameters of the element are input, a function library in the tool is called, and the element parameters are calculated by using a suitable formula. The principle of function library calculation is to perform accurate analysis on the power supply loop and the passive elements according to the power supply network distribution theory, improve the power supply noise of the whole channel by the minimum power supply channel area and the minimum number of the passive elements, and meet the requirement of the optimal power supply noise, so that the cost and the risk are reduced to the maximum extent on the premise of effectively achieving the optimal performance.
Further, the compilation of the library of functions may be established using various programming languages or directly using any data processing software.
And S930, outputting form and chart data corresponding to the classification processing result of the element parameters.
Specifically, after the analysis is performed by the function library, the form and the chart data corresponding to the classification processing result of the element parameter are output.
And S940, judging whether the element parameters meet the preset power supply noise specification requirements.
Specifically, whether the specification requirements of one or the combination of the alternating current loop impedance and the loop total power supply noise are met is judged according to the form and the chart data. If yes, go to S950; if not, return to S910.
S950, obtaining circuit parameters, wherein the circuit parameters comprise element values and element numbers.
Specifically, when the component parameters meet the preset power supply noise specification requirement, the parameter information of each component of the voltage source output circuit 210, the first noise reduction circuit 220, the second noise reduction circuit 230, the third noise reduction circuit 240 and the load circuit 250 is obtained, so as to obtain the circuit parameters of the circuit 200.
And S960, inputting the circuit parameters into a circuit template to obtain a circuit for improving power supply noise.
Specifically, after the circuit parameters are obtained, the circuit parameters are input into the circuit templates of fig. 2-7, thereby obtaining a complete circuit capable of improving power supply noise.
Further, part of the passive element parameters in the circuit can be converted into the printed circuit path parameters through the interaction of the function library.
According to the method for improving the power supply noise, the calculated circuit for improving the power supply noise can reduce the size of the circuit in a product to the maximum extent with the least number of elements, reasonable values and the smallest power supply path area, and has the effect of saving the product material cost. Meanwhile, more spaces are reserved for other parts, so that the overall performance of the product is improved, and the user experience is improved.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (7)
1. A circuit for improving power supply noise is characterized by comprising a voltage source output circuit, a first noise reduction circuit, a second noise reduction circuit, a third noise reduction circuit and a load circuit, wherein the parameters of the voltage source output circuit, the first noise reduction circuit, the second noise reduction circuit, the third noise reduction circuit and the load circuit are classified and calculated according to a function class processing tool, wherein,
the voltage source output circuit is used for providing a voltage source signal, and the voltage source signal comprises a useful power source signal and power source noise;
the first end of the first noise reduction circuit is connected with the voltage source output circuit and is used for receiving and processing low-frequency power supply noise, the first noise reduction circuit comprises a plurality of passive elements for filtering the low-frequency power supply noise, and the passive elements are mutually overlapped according to a preset circuit layout;
the first end of the second noise reduction circuit is connected with the second end of the first noise reduction circuit and is used for receiving and processing high-frequency power supply noise, the second noise reduction circuit comprises a plurality of elements for filtering the high-frequency power supply noise, and the elements are mutually overlapped according to a preset circuit layout;
the first end of the third noise reduction circuit is connected with the second end of the second noise reduction circuit and is used for receiving and processing low-frequency power supply noise which is not filtered by the first noise reduction circuit and high-frequency power supply noise which is not filtered by the second noise reduction circuit and receiving and processing noise of a load power supply;
the load circuit is connected with the second end of the third noise reduction circuit and is used for receiving the useful power supply signal filtered by the first noise reduction circuit, the second noise reduction circuit and the third noise reduction circuit.
2. The circuit for improving power supply noise according to claim 1, wherein the voltage source output circuit comprises a first resistor, a first inductor and a first capacitor, a first end of the first resistor is connected to the output terminal of the voltage source, a second end of the first resistor is connected to a first end of the first inductor, a second end of the first inductor is connected to a first end of the first capacitor, and a second end of the first capacitor is connected to ground.
3. The circuit for improving power supply noise according to claim 1, wherein the first noise reduction circuit includes a plurality of first branches, each first branch includes a second resistor, a second inductor, and a second capacitor, a first end of the second resistor is connected to the voltage source output circuit, a second end of the second resistor is connected to a first end of the second inductor, a second end of the second inductor is connected to a first end of the second capacitor, and a second end of the second capacitor is grounded.
4. The circuit for improving power supply noise according to claim 1, wherein the second noise reduction circuit includes a third resistor, a third inductor and a third capacitor, a first end of the third resistor is connected to the first noise reduction circuit, a second end of the third resistor is connected to a first end of the third inductor, a second end of the third inductor is connected to a first end of the third capacitor, and a second end of the third capacitor is connected to ground.
5. The circuit for improving power supply noise according to claim 1, wherein the third noise reduction circuit comprises a plurality of second branches, each second branch comprises a fourth resistor, a fourth inductor and a fourth capacitor, a first end of the fourth resistor is connected to the second noise reduction circuit, a second end of the fourth resistor is connected to a first end of the fourth inductor, a second end of the fourth inductor is connected to a first end of the fourth capacitor, and a second end of the fourth capacitor is grounded.
6. The circuit for improving power supply noise according to claim 1, wherein the load circuit includes a fifth resistor, a fifth inductor and a fifth capacitor, a first terminal of the fifth resistor is connected to the third noise reduction circuit, a second terminal of the fifth resistor is connected to a first terminal of the fifth inductor, a second terminal of the fifth inductor is connected to a first terminal of the fifth capacitor, and a second terminal of the fifth capacitor is connected to ground.
7. A system for improving power supply noise, comprising the circuit for improving power supply noise according to any one of claims 1 to 6, further comprising a voltage source, a circuit improving device and a load device, wherein the voltage source provides a voltage source for the circuit and is electrically connected to the load device through the circuit, a component parameter is input into the circuit improving device, when the circuit improving device determines that the component parameter meets a preset power supply noise specification requirement, the circuit parameter is obtained, and the circuit parameter comprises a component value and a component number.
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| CN108458468A (en) * | 2018-06-19 | 2018-08-28 | 奥克斯空调股份有限公司 | A kind of denoising device and air conditioner |
| CN113194389A (en) * | 2021-04-29 | 2021-07-30 | 四川虹美智能科技有限公司 | Power supply noise reduction circuit and system |
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| CN204425197U (en) * | 2015-01-20 | 2015-06-24 | 杭州宽福科技有限公司 | For the electromagnetic interference denoising device of former limit sampling LED control system |
| CN204615632U (en) * | 2015-05-08 | 2015-09-02 | 无锡天和电子有限公司 | A kind of low noise DC/DC converter |
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| KR102028921B1 (en) * | 2013-02-07 | 2019-10-08 | 삼성전자주식회사 | Device for measuring integrated circuit current and method for measuring integrated circuit current using the device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103840645A (en) * | 2012-11-26 | 2014-06-04 | 西安威正电子科技有限公司 | Filter circuit for power supply noise sensitive device |
| CN203554280U (en) * | 2013-11-15 | 2014-04-16 | 京东方科技集团股份有限公司 | Power supply circuit, power supply system and display device |
| CN204392108U (en) * | 2015-01-09 | 2015-06-10 | 李志刚 | A kind of supply unit for pre-payment controller |
| CN204425197U (en) * | 2015-01-20 | 2015-06-24 | 杭州宽福科技有限公司 | For the electromagnetic interference denoising device of former limit sampling LED control system |
| CN204615632U (en) * | 2015-05-08 | 2015-09-02 | 无锡天和电子有限公司 | A kind of low noise DC/DC converter |
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