CN217824908U - Filter circuit - Google Patents
Filter circuit Download PDFInfo
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- CN217824908U CN217824908U CN202220998029.3U CN202220998029U CN217824908U CN 217824908 U CN217824908 U CN 217824908U CN 202220998029 U CN202220998029 U CN 202220998029U CN 217824908 U CN217824908 U CN 217824908U
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Abstract
The embodiment of the utility model discloses filter circuit. The filter circuit includes: the inductor comprises a first inductor module, a second inductor module and a capacitor module; the first inductance module comprises a first inductance module and a second inductance module, the first end of the first inductance module is used as an input end, the second end of the first inductance module is used as an output end, and the third end and the fourth end of the first inductance module are respectively and electrically connected with the first end and the second end of the second inductance module; the second inductance module comprises a third inductance sub-module and a fourth inductance sub-module, one end of the third inductance sub-module is electrically connected with the third end of the second inductance sub-module, the other end of the third inductance sub-module is grounded, one end of the fourth inductance sub-module is electrically connected with the fourth end of the second inductance sub-module, and the other end of the fourth inductance sub-module is grounded; the capacitive module includes a first capacitive sub-module and a second capacitive sub-module. The embodiment of the utility model provides a filter circuit can realize the high frequency hopping of wave filter.
Description
Technical Field
The embodiment of the utility model provides a relate to filtering technology, especially relate to a filter circuit.
Background
The filter is used as a filter device, can effectively filter a frequency point of a specific frequency of a signal or frequencies except the frequency point to obtain a specific frequency or eliminate the specific frequency, can improve the anti-interference capability of the signal, is an indispensable key device in modern digital communication and frequency hopping technologies, and has wide application in the fields of communication, semiconductors and the like.
At present, in order to obtain high-index performance, conventional filter circuits are generally implemented by using components such as a wound inductor and a high-quality-factor capacitor. However, in this implementation, the inductance of the required winding inductor is very small, which is hardly adjustable, and the frequency hopping frequency of the filter is limited.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a filter circuit to realize the high frequency hopping of wave filter.
An embodiment of the utility model provides a filter circuit, include: the inductor comprises a first inductor module, a second inductor module and a capacitor module;
the first inductance module comprises a first inductance sub module and a second inductance sub module, the first end of the first inductance sub module is used as an input end, the second end of the first inductance sub module is used as an output end, and the third end and the fourth end of the first inductance sub module are electrically connected with the first end and the second end of the second inductance sub module respectively;
the second inductance module comprises a third inductance sub-module and a fourth inductance sub-module, one end of the third inductance sub-module is electrically connected with the third end of the second inductance sub-module, the other end of the third inductance sub-module is grounded, one end of the fourth inductance sub-module is electrically connected with the fourth end of the second inductance sub-module, and the other end of the fourth inductance sub-module is grounded;
the capacitor module comprises a first capacitor submodule and a second capacitor submodule, one end of the first capacitor submodule is electrically connected with the third end of the second inductor submodule, the other end of the first capacitor submodule is grounded, one end of the second capacitor submodule is electrically connected with the fourth end of the second inductor submodule, and the other end of the second capacitor submodule is grounded.
Optionally, the third inductor submodule and the fourth inductor submodule each include at least one inductor.
Optionally, the third inductor submodule and the fourth inductor submodule each include at least two inductors connected in parallel.
Optionally, the number of inductors in the third inductor sub-module is the same as that in the fourth inductor sub-module.
Optionally, the first inductor module includes a first inductor and a second inductor, one end of the first inductor is used as the first end of the first inductor module, the other end of the first inductor is used as the third end of the first inductor module, one end of the second inductor is used as the second end of the first inductor module, and the other end of the second inductor is used as the fourth end of the first inductor module.
Optionally, the first inductor and the second inductor are inductors with the same inductance value and the same model.
Optionally, the second inductor module includes a third inductor and a fourth inductor, a tap of the third inductor is used as a first end of the second inductor module, one end of the third inductor is used as a third end of the second inductor module, the other end of the third inductor is coupled to one end of the fourth inductor, the other end of the fourth inductor is used as a fourth end of the second inductor module, and a tap of the fourth inductor is used as a second end of the second inductor module.
Optionally, the third inductor and the fourth inductor are inductors with the same inductance value and the same model.
Optionally, the first capacitive submodule and the second capacitive submodule each include at least one capacitor.
Optionally, the first capacitance submodule and the second capacitance submodule each include at least one varactor diode.
The embodiment of the utility model provides a filter circuit, including first inductance module, second inductance module and electric capacity module; the first inductance module comprises a first inductance module and a second inductance module, the first end of the first inductance module is used as an input end, the second end of the first inductance module is used as an output end, and the third end and the fourth end of the first inductance module are respectively and electrically connected with the first end and the second end of the second inductance module; the second inductance module comprises a third inductance sub-module and a fourth inductance sub-module, one end of the third inductance sub-module is electrically connected with the third end of the second inductance sub-module, the other end of the third inductance sub-module is grounded, one end of the fourth inductance sub-module is electrically connected with the fourth end of the second inductance sub-module, and the other end of the fourth inductance sub-module is grounded; the capacitor module comprises a first capacitor submodule and a second capacitor submodule, one end of the first capacitor submodule is electrically connected with the third end of the second inductor submodule, the other end of the first capacitor submodule is grounded, one end of the second capacitor submodule is electrically connected with the fourth end of the second inductor submodule, and the other end of the second capacitor submodule is grounded. The embodiment of the utility model provides a filter circuit, inductance value through adjustment third inductance submodule and the inductance value of fourth inductance submodule can adjust the total inductance value of second inductance submodule, third inductance submodule and fourth inductance submodule place resonant circuit to obtain less total inductance value, be convenient for realize the high frequency hopping of wave filter.
Drawings
Fig. 1 is a block diagram of a filter circuit according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a filter circuit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another filter circuit according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a block diagram of a filter circuit according to an embodiment of the present invention, the filter circuit includes: a first inductor module 10, a second inductor module 20 and a capacitor module 30.
The first inductance module 10 comprises a first inductance module 1 and a second inductance module 2, a first end of the first inductance module 1 serves as an input end, a second end of the first inductance module 1 serves as an output end, and a third end and a fourth end of the first inductance module 1 are electrically connected with a first end and a second end of the second inductance module 2 respectively; the second inductance module 20 comprises a third inductance sub-module 3 and a fourth inductance sub-module 4, one end of the third inductance sub-module 3 is electrically connected with the third end of the second inductance sub-module 2, the other end of the third inductance sub-module 3 is grounded, one end of the fourth inductance sub-module 4 is electrically connected with the fourth end of the second inductance sub-module 2, and the other end of the fourth inductance sub-module 4 is grounded; the capacitor module 30 includes a first capacitor sub-module 31 and a second capacitor sub-module 32, one end of the first capacitor sub-module 31 is electrically connected to the third end of the second inductor sub-module 2, the other end of the first capacitor sub-module 31 is grounded, one end of the second capacitor sub-module 32 is electrically connected to the fourth end of the second inductor sub-module 2, and the other end of the second capacitor sub-module 32 is grounded.
Specifically, the first inductor module 1 may be used for impedance matching, and the second inductor module 2, the third inductor module 3, and the fourth inductor module 4 may be used for resonance. An input signal RFin of the filter circuit is transmitted to the second inductor sub-module 2 from the first end of the first inductor sub-module 1, and is filtered by a resonant circuit where the second inductor sub-module 2, the third inductor sub-module 3 and the fourth inductor sub-module 4 are located, and then is output as an output signal RFout from the second end of the first inductor sub-module 1. The frequency band width of the signal in the circuit can be changed by adjusting the capacitance value of the first capacitor submodule 31 and the capacitance value of the second capacitor submodule 32, for example, the first capacitor submodule 31 and the second capacitor submodule 32 can both be connected to a control voltage, and the capacitance value of the corresponding capacitor submodule can be changed by changing the magnitude of the control voltage, so as to realize the frequency hopping of the wide frequency band of the filter. In addition, by adjusting the inductance of the third inductor submodule 3 and the inductance of the fourth inductor submodule 4, the total inductance of the resonant circuit in which the second inductor submodule 2, the third inductor submodule 3 and the fourth inductor submodule 4 are located can be adjusted to obtain a smaller total inductance, which is convenient for realizing high-frequency hopping of the filter.
The filter circuit provided by the embodiment comprises a first inductance module, a second inductance module and a capacitance module; the first inductance module comprises a first inductance module and a second inductance module, the first end of the first inductance module is used as an input end, the second end of the first inductance module is used as an output end, and the third end and the fourth end of the first inductance module are respectively and electrically connected with the first end and the second end of the second inductance module; the second inductance module comprises a third inductance sub-module and a fourth inductance sub-module, one end of the third inductance sub-module is electrically connected with the third end of the second inductance sub-module, the other end of the third inductance sub-module is grounded, one end of the fourth inductance sub-module is electrically connected with the fourth end of the second inductance sub-module, and the other end of the fourth inductance sub-module is grounded; the capacitor module comprises a first capacitor submodule and a second capacitor submodule, one end of the first capacitor submodule is electrically connected with the third end of the second inductor submodule, the other end of the first capacitor submodule is grounded, one end of the second capacitor submodule is electrically connected with the fourth end of the second inductor submodule, and the other end of the second capacitor submodule is grounded. The filter circuit provided by this embodiment can adjust the total inductance value of the resonant circuit in which the second inductor submodule, the third inductor submodule and the fourth inductor submodule are located by adjusting the inductance value of the third inductor submodule and the inductance value of the fourth inductor submodule, so as to obtain a smaller total inductance value, thereby facilitating the implementation of high-frequency hopping of the filter.
Optionally, the third inductor sub-module 3 and the fourth inductor sub-module 4 each include at least one inductor.
Exemplarily, fig. 2 is a schematic structural diagram of a filter circuit provided by the embodiment of the present invention, and with reference to fig. 1 and fig. 2, the third inductor submodule 3 includes an inductor L5, the fourth inductor submodule 4 includes an inductor L6, and by adjusting the inductor L5 in the third inductor submodule 3 and the inductor L6 in the fourth inductor submodule 4, the total inductance value of the resonant loop where the second inductor submodule 2, the third inductor submodule 3 and the fourth inductor submodule 4 are located can be changed, so as to obtain a smaller total inductance value, and thus, high frequency hopping of the filter is realized.
Optionally, the third inductor submodule 3 and the fourth inductor submodule 4 each include at least two inductors connected in parallel.
Specifically, fig. 3 is a schematic structural diagram of another filter circuit provided in the embodiment of the present invention, and with reference to fig. 1 and fig. 3, the third inductance sub-module 3 includes a plurality of parallel-connected inductances L5, and the fourth inductance sub-module 4 includes a plurality of parallel-connected inductances L6, and the frequency hopping frequency can be increased to a higher range by adjusting values of the plurality of parallel-connected inductances. The inductance value of the parallel connection inductor can be adjusted at will, and the parallel connection inductor can be flexibly realized for different frequency bands and different bandwidths. Meanwhile, due to the fact that the inductors are connected in parallel, the inductor L5 and the inductor L6 which are larger can be selected, and for the application occasions with larger power, the inductor with higher power value can be obtained under the condition of limited space, and the filter can achieve high-frequency hopping with higher indexes.
Optionally, the number of inductors in the third inductor sub-module 3 is the same as that in the fourth inductor sub-module 4. With the arrangement, when inductance values of the inductors in the third inductor submodule 3 and the fourth inductor submodule 4 are integrally changed, uniform adjustment is facilitated.
Optionally, the first inductor sub-module 1 includes a first inductor L1 and a second inductor L2, one end of the first inductor L1 is used as the first end of the first inductor sub-module 1, the other end of the first inductor L1 is used as the third end of the first inductor sub-module 1, one end of the second inductor L2 is used as the second end of the first inductor sub-module 1, and the other end of the second inductor L2 is used as the fourth end of the first inductor sub-module 1.
The first inductor L1 transmits an input signal RFin to the second inductor submodule 2, and a signal transmitted by the second inductor submodule 2 is filtered and then output as an output signal RFout by the second inductor L2. The inductance values of the first inductor L1 and the second inductor L2 can be set according to actual circuit requirements, and are not limited herein.
Optionally, the first inductor L1 and the second inductor L2 are inductors with the same inductance value and the same model. By means of the arrangement, the first inductor L1 and the second inductor L2 can be symmetrical and uniformly adjusted.
Optionally, the second inductor sub-module 2 includes a third inductor L3 and a fourth inductor L4, a tap of the third inductor L3 is used as a first end of the second inductor sub-module 2, one end of the third inductor L3 is used as a third end of the second inductor sub-module 2, the other end of the third inductor L3 is coupled to one end of the fourth inductor L4, the other end of the fourth inductor L4 is used as a fourth end of the second inductor sub-module 2, and a tap of the fourth inductor L4 is used as a second end of the second inductor sub-module 2; or, a tap of the third inductor L3 serves as the second end of the second inductor module 2, and a tap of the fourth inductor L4 serves as the first end of the second inductor module 2.
The third inductor L3 and the fourth inductor L4 are coupled and connected, the coupling mode is magnetic field coupling, and the coupling degree of the third inductor L3 and the fourth inductor L4 is adjustable. The third inductor L3 and the fourth inductor L4, as well as the inductor L5 in the third inductor sub-module 3 and the inductor L6 in the fourth inductor sub-module 4 are connected in parallel to form a resonant tank. The first inductor L1 transmits the input signal RFin to the third inductor L3, and the input signal RFin is filtered by the resonant tank where the third inductor L3 is located, coupled to the fourth inductor L4 coupled to the third inductor L3, and output by the second inductor L2 connected to the fourth inductor L4.
Optionally, the third inductor L3 and the fourth inductor L4 are inductors with the same inductance value and the same model. By the arrangement, the third inductor L3 and the fourth inductor L4 can be symmetrical and uniformly adjusted.
Optionally, the first capacitance submodule 31 and the second capacitance submodule 32 each comprise at least one varactor diode. Illustratively, the first capacitance submodule 31 includes a varactor CP1, and the second capacitance submodule 32 includes a varactor CP2, and the frequency band width of the signal in the circuit is changed by adjusting the capacitance of the varactor.
Optionally, the first capacitive submodule 31 and the second capacitive submodule 32 each comprise at least one capacitor. The first capacitor sub-module 31 and the second capacitor sub-module 32 each include one capacitor, or each include at least two capacitors connected in parallel.
It should be noted that the specific number of the components such as the capacitors and the inductors in each sub-module may be set according to the actual circuit requirement, and is not limited herein.
In the filter circuit provided in this embodiment, the first inductance sub-module includes a first inductance and a second inductance, one end of the first inductance is used as the first end of the first inductance sub-module, the other end of the first inductance is used as the third end of the first inductance sub-module, one end of the second inductance is used as the second end of the first inductance sub-module, and the other end of the second inductance is used as the fourth end of the first inductance sub-module. The second inductor sub-module comprises a third inductor and a fourth inductor, a tap of the third inductor is used as a first end of the second inductor sub-module, one end of the third inductor is used as a third end of the second inductor sub-module, the other end of the third inductor is coupled with one end of the fourth inductor, the other end of the fourth inductor is used as a fourth end of the second inductor sub-module, a tap of the fourth inductor is used as a second end of the second inductor sub-module, the third inductor sub-module is electrically connected with the third inductor, and the fourth inductor sub-module is electrically connected with the fourth inductor. The filter circuit provided by this embodiment can adjust the total inductance value of the resonant circuit in which the third inductor, the fourth inductor, the third inductor submodule and the fourth inductor submodule are located by adjusting the inductance value of the third inductor submodule and the inductance value of the fourth inductor submodule, so as to obtain a smaller total inductance value, and facilitate the implementation of high-frequency hopping of the filter.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. A filter circuit, comprising: the inductor comprises a first inductor module, a second inductor module and a capacitor module;
the first inductance module comprises a first inductance sub-module and a second inductance sub-module, a first end of the first inductance sub-module is used as an input end, a second end of the first inductance sub-module is used as an output end, and a third end and a fourth end of the first inductance sub-module are respectively and electrically connected with a first end and a second end of the second inductance sub-module;
the second inductance module comprises a third inductance sub-module and a fourth inductance sub-module, one end of the third inductance sub-module is electrically connected with the third end of the second inductance sub-module, the other end of the third inductance sub-module is grounded, one end of the fourth inductance sub-module is electrically connected with the fourth end of the second inductance sub-module, and the other end of the fourth inductance sub-module is grounded;
the capacitor module comprises a first capacitor sub-module and a second capacitor sub-module, one end of the first capacitor sub-module is electrically connected with the third end of the second inductor sub-module, the other end of the first capacitor sub-module is grounded, one end of the second capacitor sub-module is electrically connected with the fourth end of the second inductor sub-module, and the other end of the second capacitor sub-module is grounded.
2. The filter circuit of claim 1, wherein the third and fourth inductor sub-modules each include at least one inductor.
3. The filter circuit of claim 1, wherein the third and fourth inductor sub-modules each comprise at least two inductors connected in parallel.
4. The filter circuit of claim 1, wherein the number of inductors in the third and fourth inductor sub-modules is the same.
5. The filter circuit of claim 1, wherein the first inductor sub-module comprises a first inductor and a second inductor, one end of the first inductor is used as the first end of the first inductor sub-module, the other end of the first inductor is used as the third end of the first inductor sub-module, one end of the second inductor is used as the second end of the first inductor sub-module, and the other end of the second inductor is used as the fourth end of the first inductor sub-module.
6. The filter circuit of claim 5, wherein the first inductor and the second inductor are inductors having the same inductance and the same type.
7. The filter circuit of claim 1, wherein the second inductor module comprises a third inductor and a fourth inductor, a tap of the third inductor is used as the first terminal of the second inductor module, one terminal of the third inductor is used as the third terminal of the second inductor module, the other terminal of the third inductor is coupled with one terminal of the fourth inductor, the other terminal of the fourth inductor is used as the fourth terminal of the second inductor module, and a tap of the fourth inductor is used as the second terminal of the second inductor module.
8. The filter circuit of claim 7, wherein the third inductor and the fourth inductor are inductors having the same inductance and the same type.
9. The filter circuit of claim 1, wherein the first capacitive sub-module and the second capacitive sub-module each include at least one capacitor.
10. The filter circuit of claim 1, wherein the first and second capacitance sub-modules each comprise at least one varactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220998029.3U CN217824908U (en) | 2022-04-25 | 2022-04-25 | Filter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220998029.3U CN217824908U (en) | 2022-04-25 | 2022-04-25 | Filter circuit |
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| Publication Number | Publication Date |
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| CN217824908U true CN217824908U (en) | 2022-11-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220998029.3U Active CN217824908U (en) | 2022-04-25 | 2022-04-25 | Filter circuit |
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| CN (1) | CN217824908U (en) |
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- 2022-04-25 CN CN202220998029.3U patent/CN217824908U/en active Active
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