Filter and electronic equipment

Abstract

The utility model relates to a filter and electronic equipment. The filter comprises a first pin used for being connected with power input, a second pin used for providing power output, and a third pin used for being connected with an interference signal generation module. The filtering unit corresponds to the interference signal generation module; wherein the filtering unit comprises a first diode, a second diode and a resonance circuit; the first end of the resonance circuit is connected with the cathode of the first diode and the anode of the second diode, the anode of the first diode forms the first end of the filtering unit and is connected with the first pin, and the cathode of the second diode forms the second end of the filtering unit and is connected with the second pin. The second end of the resonance circuit forms the third end of the filtering unit and is connected with the third pin. According to the utility model, interference signals can be converted, so that the energy conversion efficiency of power supply input is improved while power supply input filtering is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuits, and more particularly to a filter and electronic equipment. Background Art

[0002] A filter is usually set up in the power input to filter the power input to prevent interference signals in the power input from entering the working circuit along with the power input. However, it is rarely considered that when the power input is connected to the working circuit, the working circuit will also generate interference signals. This interference signal will also be transmitted along with the power input to the power input end of the working circuit, affecting the working circuit. Utility Model Content

[0003] The technical problem to be solved by the present invention is to provide a filter and an electronic device in view of the above-mentioned technical defects of the prior art.

[0004] The technical solution adopted by the present invention to solve its technical problems is: constructing a filter, including: a first pin for connecting a power input, a second pin for providing a power output, and a third pin for connecting an interference signal generating module; and a filtering unit corresponding to the interference signal generating module; wherein the filtering unit includes a first diode, a second diode and a resonant circuit; the first end of the resonant circuit is connected to the cathode of the first diode and the anode of the second diode, the anode of the first diode forms the first end of the filtering unit and is connected to the first pin, the cathode of the second diode forms the second end of the filtering unit and is connected to the second pin, and the second end of the resonant circuit forms the third end of the filtering unit and is connected to the third pin.

[0005] Preferably, in the filter described in the embodiment of the present utility model, the first diode and the second diode are high-frequency diodes.

[0006] Preferably, in the filter described in the embodiment of the present utility model, the resonant circuit includes a resonant inductor and a resonant capacitor;

[0007] The resonant inductor is connected in series with the resonant capacitor, and a first end of the series connection of the resonant inductor and the resonant capacitor forms a third end of the filter, and a second end of the series connection of the resonant inductor and the resonant capacitor is connected to the cathode of the first diode and the anode of the second diode.

[0008] Preferably, in the filter described in the embodiment of the present invention, the third pin includes multiple pins for connecting one-to-one with several different interference signal generating modules, and the filtering unit includes multiple filtering units corresponding one-to-one to the several different interference signal generating modules.

[0009] Preferably, in the filter described in the embodiment of the present utility model, the plurality of filter units include a plurality of first filter units connected in parallel with each other; wherein,

[0010] The first ends of all the first filter units are connected to each other and then to the first pin, and the second ends of all the first filter units are connected to each other and then to the second pin.

[0011] Preferably, in the filter described in the embodiment of the present utility model, the plurality of filtering units include a plurality of second filtering units connected in cascade; wherein,

[0012] The first end of each second filtering unit is connected to the first pin or the second end of the upper second filtering unit, and the second end of the second filtering unit is connected to the first end of the lower second filtering unit or the second pin.

[0013] Preferably, in the filter described in the embodiment of the present utility model, the filter further comprises a fourth pin, and the second end of the second filtering unit is connected to the first end of the lower-stage second filtering unit and then connected to the fourth pin.

[0014] Preferably, in the filter described in the embodiment of the present invention, the resonant frequency of the resonant circuit in the filtering unit is the same as the interference frequency of the interference signal generating module corresponding to the filtering unit.

[0015] Preferably, in the filter described in the embodiment of the present utility model, the resonant inductor includes an inductor with an inductance value of 230uH, and the resonant capacitor includes a capacitor with a capacitance value of 47nF.

[0016] The utility model also provides an electronic device, comprising the filter as described above.

[0017] Preferably, in the electronic device described in the embodiment of the present utility model, when there are multiple third pins, one of the third pins is used to connect the first end of the power supply in the interference signal generating module, and another one of the third pins is used to connect the second end of the power supply in the interference signal generating module.

[0018] A filter and electronic equipment implementing the present invention have the following beneficial effects: by converting interference signals, the power input can be filtered while improving the energy conversion efficiency of the power input. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0020] Figure 1 This is a circuit diagram of an embodiment of a filter of the present utility model;

[0021] Figure 2 This is a circuit diagram of another embodiment of a filter of the utility model;

[0022] Figure 3 This is a circuit diagram of another embodiment of a filter of the present invention;

[0023] Figure 4 This is a circuit diagram of another embodiment of a filter of the present invention;

[0024] Figure 5 This is a partial circuit schematic diagram of an embodiment of an electronic device of the present utility model;

[0025] Figure 6 This is a partial circuit schematic diagram of another embodiment of an electronic device of the present utility model. DETAILED DESCRIPTION

[0026] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings.

[0027] like Figure 1 As shown, in a first embodiment of a filter of the present invention, the filter includes: a first pin 110 for connecting to a power input, a second pin 120 for providing a power output, and a third pin 130 for connecting to an interference signal generating module; and a filter unit corresponding to the interference signal generating module; wherein the filter unit includes a first diode, a second diode, and a resonant circuit 140; the first end of the resonant circuit 140 is connected to the cathode of the first diode and the anode of the second diode, the anode of the first diode forms the first end of the filter unit and is connected to the first pin 110, the cathode of the second diode forms the second end of the filter unit and is connected to the second pin 120, and the second end of the resonant circuit 140 forms the third end of the filter unit and is connected to the third pin 130. Specifically, when the filter is in operation, the power input is connected through the first pin 110 of the filter, the power output is provided through the second pin 120 of the filter, and the third pin 130 of the filter is used to connect to the interference signal generating module. The interference signal generating module can be understood as the circuit portion in the circuit that generates interference signals or interferes with the power input. The filter is provided with a filtering unit corresponding to the interference signal generating module, and is used to filter the interference signal generated by the interference signal generating module. The filtering unit includes a first diode, a second diode and a resonant circuit 140. Figure 1As shown, in a specific embodiment, the first diode includes a diode D1, and the second diode includes a diode D2. In the filter unit, the power input is input to the first end of the filter unit, i.e., the anode of the first diode, through the first pin 110, and then input to the anode of the second diode through the cathode of the first diode, and finally through the cathode of the second diode, i.e., the second end of the filter unit, and then through the second pin 120 of the filter to provide a power output. The interference signal generated by the interference signal generation module enters the resonant circuit 140 through the third pin 130 of the filter and the second end of the filter unit. After being processed by the resonant circuit 140, filtering and energy conversion are achieved. The generated harmonic signal is rectified by the second diode and outputs a DC voltage at the second end of the filter unit. The power output of the second pin 120 of the filter is enhanced by the DC voltage. Through this process, the interference signal can be converted while filtering the interference signal, and energy conversion is performed by the interference signal to improve the output efficiency of the power output.

[0028] In one embodiment, the resonant frequency of the resonant circuit 140 in the filter unit is the same as the interference frequency of the interference signal generating module corresponding to the filter unit. That is, by setting the resonant frequency of the resonant circuit 140 in the filter unit, the filter unit is able to just perform energy conversion on the interference frequency of the interference signal generating module to achieve the filtering effect. It is understood that the sameness can be approximately the same, that is, when the deviation between the resonant frequency of the resonant circuit 140 and the interference frequency of the interference signal generating module is within a preset range, it can be determined that the resonant frequency of the resonant circuit 140 is the same as the interference frequency of the interference signal generating module corresponding to the filter unit.

[0029] In one embodiment, both the first diode and the second diode are high-frequency diodes. That is, the first diode is used to prevent the resonant output of the resonant circuit 140 from affecting the power input, and the second diode can effectively realize energy conversion of the resonant output of the resonant circuit 140.

[0030] In one embodiment, the resonant circuit 140 includes a resonant inductor and a resonant capacitor; the resonant inductor and the resonant capacitor are connected in series, and the first end of the resonant inductor and the resonant capacitor after being connected in series forms the third end of the filter, and the second end of the resonant inductor and the resonant capacitor after being connected in series is connected to the cathode of the first diode and the anode of the second diode. Specifically, the resonant circuit 140 includes but is not limited to the resonant inductor and the resonant capacitor connected in series. In a specific embodiment, the resonant inductor may include an inductor L1, and the resonant capacitor includes a capacitor C1. After the resonant inductor and the resonant capacitor are connected in series, one end is connected to the anode of the second diode, and the other end forms the third end of the filter for connecting to the third pin 130 of the filter. It can be understood that the values ​​of the resonant inductor and the resonant capacitor can be selected according to the interference frequency of the interference signal generating module. In a specific embodiment, the resonant inductor includes but is not limited to selecting an inductor with an inductance of 230uH, and the resonant capacitor includes but is not limited to selecting a capacitor with a capacitance of 47nF.

[0031] like Figures 2 to 4 As shown, in one embodiment, the third pin 130 includes a plurality of pins for being connected one by one with several different interference signal generating modules, and the filtering unit includes a plurality of filtering units corresponding one by one with several different interference signal generating modules. That is, in the filter, there are multiple filtering units, and the third pin 130 of the filter can be multiple, and the third end of each filtering unit forms a corresponding connection relationship with the third pin 130 of the filter. And the third pin 130 of each filter can be used to connect an interference signal generating module, so as to realize the filtering of the interference signal of the corresponding interference signal generating module by the corresponding filtering unit. In one embodiment, considering that the interference frequencies of several different interference signal generating modules are the same or different, it is possible to set the interference signal generating modules that generate the same or similar interference frequencies to be connected to the same filtering unit at the same time, or it is also possible to set different interference signal generating modules to be connected to the corresponding filtering units respectively according to the physical position of the interference signal generating module, without considering the corresponding interference frequency.

[0032] In one embodiment, if Figure 2 As shown, the multiple filter units include multiple first filter units connected in parallel; wherein the first ends of all the first filter units are connected to each other and then to the first pin 110 of the filter, and the second ends of all the first filter units are connected to each other and then to the second pin 120 of the filter. Specifically, when the filter includes multiple filter units, the first ends of some or all of the filter units are connected to each other and then to the first pin 110 of the filter, and the second ends of some or all of the filter units are connected to each other and then to the third pin 130 of the filter. Simply put, these filter units are connected in parallel.

[0033] In one embodiment, if Figure 3 or Figure 4 As shown, the multiple filtering units include multiple second filtering units connected in cascade; wherein the first end of each second filtering unit is connected to the first pin 110 of the filter or the second end of the upper second filtering unit, and the second end of the second filtering unit is connected to the first end of the lower second filtering unit or the second pin 120 of the filter. Specifically, when the filter includes multiple filtering units, the first end of one of the filtering units is connected to the first pin 110 of the filter, the second end of the filtering unit is connected to the first end of the lower filtering unit, and the second end of the lower filtering unit is further connected to the first end of another lower filtering unit until the last filtering unit, and the second end of the last filtering unit is connected to the second pin 120 of the filter. Simply put, some or all of the filtering units form a cascade relationship.

[0034] In one embodiment, within the filter, filter units may be connected in parallel and in series simultaneously. That is, it is understood that the filter may include multiple first filter units or multiple second filter units. The first filter units and the second filter units may be the same or different.

[0035] Optional, such as Figure 4 As shown, the filter further includes a fourth pin 150. The second end of the second filter unit is connected to the first end of the lower-stage second filter unit and then connected to the fourth pin 150. Specifically, the fourth pin 150 can be configured to connect to a corresponding power input or serve as a power output. In one embodiment, there can be multiple fourth pins 150. That is, when two or more second filter units are connected in series, each series node is connected to a corresponding fourth pin.

[0036] In addition, the electronic device of the present invention may be provided with the above filter, and the power input of the electronic device may be filtered by the filter.

[0037] Optional, such as Figure 5 and Figure 6 As shown, in an electronic device, when the filter includes multiple third pins 130, one of the third pins 130 is used to connect to the first end of the power supply in the interference signal generating module, and another of the third pins 130 is used to connect to the second end of the power supply 200 in the interference signal generating module. When there are multiple third pins 130, one of the third pins 130 can be connected to the first end of the power supply 200 in the interference signal generating module, and another can be connected to the second end of the power supply 200 in the interference signal generating module, so that the interference signal of the same interference signal generating module can be filtered by two filtering units respectively.

[0038] It can be understood that the above embodiments only express the preferred implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can be made, all of which fall within the scope of protection of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should fall within the scope of coverage of the claims of the present invention.

Claims

1. A filter, characterized in that: include: A first pin for connecting to a power input, a second pin for providing a power output, and a third pin for connecting to an interference signal generating module; and a filtering unit corresponding to the interference signal generating module; wherein, The filtering unit includes a first diode, a second diode and a resonant circuit; The first end of the resonant circuit is connected to the cathode of the first diode and the anode of the second diode, the anode of the first diode forms the first end of the filter unit and is connected to the first pin, the cathode of the second diode forms the second end of the filter unit and is connected to the second pin, and the second end of the resonant circuit forms the third end of the filter unit and is connected to the third pin.

2. The filter according to claim 1, wherein The first diode and the second diode are high-frequency diodes.

3. The filter according to claim 1, wherein The resonant circuit includes a resonant inductor and a resonant capacitor; The resonant inductor is connected in series with the resonant capacitor, and a first end of the series connection of the resonant inductor and the resonant capacitor forms a third end of the filter, and a second end of the series connection of the resonant inductor and the resonant capacitor is connected to the cathode of the first diode and the anode of the second diode.

4. The filter according to claim 1, wherein The third pin includes a plurality of pins for one-to-one connection with a plurality of different interference signal generating modules, and the filtering unit includes a plurality of filtering units corresponding one-to-one to the plurality of different interference signal generating modules.

5. The filter according to claim 4, characterized in that The plurality of filtering units include a plurality of first filtering units connected in parallel with each other; wherein, The first ends of all the first filter units are connected to each other and then to the first pin, and the second ends of all the first filter units are connected to each other and then to the second pin.

6. The filter according to claim 4, characterized in that The plurality of filtering units include a plurality of second filtering units connected in cascade; wherein, The first end of each second filtering unit is connected to the first pin or the second end of the upper second filtering unit, and the second end of the second filtering unit is connected to the first end of the lower second filtering unit or the second pin.

7. The filter according to claim 6, characterized in that The filter further includes a fourth pin; The second end of the second filtering unit is connected to the first end of the second filtering unit at the next stage and then connected to the fourth pin.

8. The filter according to claim 1, wherein The resonant frequency of the resonant circuit in the filtering unit is the same as the interference frequency of the interference signal generating module corresponding to the filtering unit.

9. An electronic device, characterized in that: Comprising the filter according to any one of claims 1 to 8.

10. The electronic device according to claim 9, characterized in that When there are multiple third pins, one of the third pins is used to connect to the first end of the power supply in the interference signal generating module, and another of the third pins is used to connect to the second end of the power supply in the interference signal generating module.

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