CN218603459U

CN218603459U - Split type band-pass filter circuit

Info

Publication number: CN218603459U
Application number: CN202221973883.0U
Authority: CN
Inventors: 朱晓辉; 熊运自; 王晓乐
Original assignee: Huizhou Gaoshengda Technology Co Ltd
Current assignee: Huizhou Gaoshengda Technology Co Ltd
Priority date: 2022-07-28
Filing date: 2022-07-28
Publication date: 2023-03-10
Anticipated expiration: 2032-07-28

Abstract

The utility model relates to a circuit field of router discloses a band-pass filter circuit of disconnect-type, including disconnect-type band-pass filter module, host system and radio frequency module, disconnect-type band-pass filter module's input with host system's output electricity is connected, disconnect-type band-pass filter module's output with radio frequency module's input electricity is connected. The band-pass filtering module replaces the traditional integrated circuit scheme with a separated design scheme, and components used in the separated design scheme are easy to obtain and low in price, so that the manufacturing cost of products is reduced; the product is easy to maintain in the later period, and the later maintenance cost of the product can be greatly reduced; PCB space can be saved, and the miniaturization design of the router is possible. Thereby the product has more industrial competitiveness.

Description

Split type band-pass filter circuit

Technical Field

The utility model relates to a circuit field of router especially relates to a band-pass filter circuit of disconnect-type.

Background

At present, with the development of technology, cost optimization is more and more emphasized, and a router with powerful functions and cost advantages has more industrial competitiveness.

At present, a radio frequency interface circuit of a router generally uses a band-pass filter in an integrated circuit scheme, but the cost of the scheme is high, so that the overall cost of the router is high, and further the industry competitiveness of products is insufficient.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the defects in the prior art and providing a separated band-pass filter circuit, wherein the band-pass filter module replaces the traditional integrated circuit scheme with a separated design scheme, and the components used in the separated design scheme are easy to obtain and have low price, thereby reducing the manufacturing cost of products; the product is easy to maintain in the later period, and the maintenance cost in the later period of the product can be greatly reduced; the space of the PCB can be saved, the possibility is provided for the miniaturization design of the router, and the product has more industrial competitiveness.

The purpose of the utility model is realized through the following technical scheme:

a split bandpass filter circuit, comprising: a separate band-pass filter module, a main control module and a radio frequency module,

the input end of the separated band-pass filter module is electrically connected with the output end of the main control module, the output end of the separated band-pass filter module is electrically connected with the input end of the radio frequency module,

the separated band-pass filter module comprises an LC series resonance branch and a plurality of sections of LC filter branches, the input end of the LC series resonance branch is electrically connected with the input end of the main control module and the input ends of the plurality of sections of LC filter branches, and the output ends of the plurality of sections of LC filter branches are electrically connected with the input end of the radio frequency module.

Preferably, the LC series resonance branch includes an inductor L2 and a capacitor C3, one end of the inductor L2 is electrically connected to the input terminal of the main control module and the input terminals of the plurality of LC filtering branches, the other end of the inductor L2 is electrically connected to one end of the capacitor C3, and the other end of the capacitor C3 is grounded.

Preferably, the multiple LC filtering branches include a capacitor C4, an inductor L3, a capacitor C5, an inductor L4, a capacitor C6, and a capacitor C7, one end of the capacitor C4 is electrically connected to one end of the inductor L3 at the input end of the LC series resonance branch, the other end of the capacitor C4 is grounded, the other end of the inductor L3 is electrically connected to one end of the capacitor C5 and one end of the inductor L4, the other end of the capacitor C5 is grounded, the other end of the inductor L4 is electrically connected to one end of the capacitor C6 and one end of the capacitor C7, the other end of the capacitor C6 is grounded, and the other end of the capacitor C7 is electrically connected to the input end of the radio frequency module.

Preferably, the main control module comprises an IC chip and a pi-type LC filter branch, an input end of the pi-type LC filter branch is electrically connected to the IC chip, and an output end of the pi-type LC filter branch is electrically connected to an input end of the separate band-pass filter module.

Preferably, the pi-type LC filter branch includes a capacitor C1, an inductor L1, and a capacitor C2, one end of the capacitor C1 is electrically connected to the IC chip and one end of the inductor L1, the other end of the capacitor C1 is grounded, the other end of the inductor L1 is electrically connected to one end of the capacitor C2 and the input end of the split-type band-pass filter module, and the other end of the capacitor C2 is grounded.

Preferably, the radio frequency module comprises a pi-type filtering branch and an antenna interface, an input end of the pi-type filtering branch is electrically connected with an output end of the separated band-pass filtering module, and an output end of the pi-type filtering branch is electrically connected with the antenna interface.

Preferably, the pi-type filtering branch comprises a capacitor C8, an inductor L5 and a capacitor C9, one end of the capacitor C8 is electrically connected to the output end of the split-type band-pass filtering module and one end of the inductor, the other end of the capacitor C8 is grounded, the other end of the inductor L5 is electrically connected to one end of the capacitor C9 and the interface, and the other end of the capacitor C9 is grounded.

The utility model discloses compare in prior art's advantage and beneficial effect as follows:

the utility model discloses a set up the band-pass filter module into LC series resonance branch road and multisection LC filtering branch road, the demand of router function can be satisfied to this kind of disconnect-type design, thereby can replace traditional integrated circuit scheme with the disconnect-type design, the components and parts that use in this kind of disconnect-type design obtain easily, and compare traditional integrated circuit scheme price cheaper, thereby make product manufacturing cost reduce, the product later stage is also maintained more easily, can greatly reduced product later stage's maintenance cost, still can save the PCB space, miniaturized design for the router provides probably, and then make the product more have trade competitiveness.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on these drawings without inventive efforts.

Fig. 1 is a functional block diagram of a separated band-pass filter circuit according to an embodiment of the present invention;

fig. 2 is a circuit diagram of a separated band pass filter circuit according to an embodiment of the present invention.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are illustrated in the accompanying drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Referring to fig. 1 to 2, a separated band-pass filter circuit includes: a separate band-pass filter module 200, a main control module 100 and a radio frequency module 300,

the input end of the separated band-pass filter module 200 is electrically connected with the output end of the main control module 100, the output end of the separated band-pass filter module 200 is electrically connected with the input end of the radio frequency module 300,

the separated band-pass filtering module 200 includes an LC series resonance branch and a plurality of LC filtering branches, an input end of the LC series resonance branch is electrically connected to an input end of the main control module 100 and an input end of the plurality of LC filtering branches, and an output end of the plurality of LC filtering branches is electrically connected to an input end of the radio frequency module 300.

So, through setting up band-pass filter module LC series resonance branch road and multisection LC filtering branch road, this kind of disconnect-type design can satisfy the demand of router function, thereby can replace traditional integrated circuit scheme with the disconnect-type design, the components and parts that use in this kind of disconnect-type design obtain easily, and compare traditional integrated circuit scheme lower price, thereby make product manufacturing cost reduce, the product later stage also maintains more easily, maintenance cost in product later stage can greatly reduced, still can save the PCB space, miniaturization design for the router provides probably, and then make the product more have trade competitiveness. The specific working principle is as follows: the LC series resonance branch filters out interference signals and allows required signals to pass through independently; the multi-section LC filtering branch circuit filters out unnecessary harmonic waves, so that the output current is smoother. The LC series resonance branch circuit is connected with the multiple sections of LC filtering branch circuits in series, so that the functions required by the router are met, and the integrated circuit type band-pass filter is replaced.

Referring to fig. 2, the LC series resonance branch includes an inductor L2 and a capacitor C3, one end of the inductor L2 is electrically connected to the input end of the main control module 100 and the input ends of the plurality of LC filtering branches, the other end of the inductor L2 is electrically connected to one end of the capacitor C3, and the other end of the capacitor C3 is grounded. So through setting up inductance L2 and electric capacity C3 for LC series resonance branch has the filtering interference signal, lets the function that the required signal passes through alone.

Referring to fig. 2, in an embodiment, the multiple LC filtering branches include a capacitor C4, an inductor L3, a capacitor C5, an inductor L4, a capacitor C6, and a capacitor C7, one end of the capacitor C4 is electrically connected to one end of the inductor L3 and the input end of the LC series resonant branch, the other end of the capacitor C4 is grounded, the other end of the inductor L3 is electrically connected to one end of the capacitor C5 and one end of the inductor L4, the other end of the capacitor C5 is grounded, the other end of the inductor L4 is electrically connected to one end of the capacitor C6 and one end of the capacitor C7, the other end of the capacitor C6 is grounded, and the other end of the capacitor C7 is electrically connected to the input end of the rf module 300. So through setting up electric capacity C4, inductance L3, electric capacity C5, inductance L4, electric capacity C6 and electric capacity C7, make LC series resonance branch can filter the unnecessary harmonic, makes output current more level and smooth.

Referring to fig. 2, in an embodiment, the main control module 100 includes an IC chip and a pi-type LC filter branch, an input end of the pi-type LC filter branch is electrically connected to the IC chip, and an output end of the pi-type LC filter branch is electrically connected to an input end of the separated band-pass filter module 200.

In this embodiment, the IC chip is MT7976C.

Referring to fig. 2, in an embodiment, the pi-type LC filter branch includes a capacitor C1, an inductor L1, and a capacitor C2, one end of the capacitor C1 is electrically connected to the IC chip and one end of the inductor L1, the other end of the capacitor C1 is grounded, the other end of the inductor L1 is electrically connected to one end of the capacitor C2 and the input end of the separated band-pass filter module 200, and the other end of the capacitor C2 is grounded. Therefore, the capacitor C1, the inductor L1 and the capacitor C2 are arranged, so that the pi-type LC filtering branch circuit has the function of filtering out unnecessary harmonic waves and outputting more smooth current.

Referring to fig. 2, in an embodiment, the radio frequency module 300 includes a pi-type filtering branch and an antenna interface, an input end of the pi-type filtering branch is electrically connected to an output end of the separable band-pass filtering module 200, and an output end of the pi-type filtering branch is electrically connected to the antenna interface. The antenna interface is used for connecting an antenna.

Referring to fig. 2, in an embodiment, the pi-type filtering branch includes a capacitor C8, an inductor L5, and a capacitor C9, one end of the capacitor C8 is electrically connected to the output end of the separated band-pass filtering module 200 and one end of the inductor, the other end of the capacitor C8 is grounded, the other end of the inductor L5 is electrically connected to one end of the capacitor C9 and the interface, and the other end of the capacitor C9 is grounded. Therefore, the capacitor C8, the inductor L5 and the capacitor C9 are arranged, so that the pi-type filtering branch circuit has the function of filtering out unnecessary harmonic waves and outputting more smooth current.

The above-mentioned embodiments only represent several embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A split bandpass filter circuit, comprising: a separate band-pass filter module, a main control module and a radio frequency module,

2. The separated band-pass filter circuit according to claim 1, wherein the LC series resonant branch comprises an inductor L2 and a capacitor C3, one end of the inductor L2 is electrically connected to the input terminal of the main control module and the input terminals of the plurality of LC filtering branches, the other end of the inductor L2 is electrically connected to one end of the capacitor C3, and the other end of the capacitor C3 is grounded.

3. The separated band-pass filter circuit according to claim 1, wherein the plurality of LC filter branches include a capacitor C4, an inductor L3, a capacitor C5, an inductor L4, a capacitor C6, and a capacitor C7, one end of the capacitor C4 is electrically connected to one end of the inductor L3 and the input end of the LC series resonant branch, the other end of the capacitor C4 is grounded, the other end of the inductor L3 is electrically connected to one end of the capacitor C5 and one end of the inductor L4, the other end of the capacitor C5 is grounded, the other end of the inductor L4 is electrically connected to one end of the capacitor C6 and one end of the capacitor C7, the other end of the capacitor C6 is grounded, and the other end of the capacitor C7 is electrically connected to the input end of the rf module.

4. The separated band-pass filter circuit according to claim 1, wherein the main control module comprises an IC chip and a pi-type LC filtering branch, an input end of the pi-type LC filtering branch is electrically connected to the IC chip, and an output end of the pi-type LC filtering branch is electrically connected to an input end of the separated band-pass filter module.

5. The separated band-pass filter circuit according to claim 4, wherein the pi-type LC filtering branch comprises a capacitor C1, an inductor L1 and a capacitor C2, one end of the capacitor C1 is electrically connected to the IC chip and one end of the inductor L1, the other end of the capacitor C1 is grounded, the other end of the inductor L1 is electrically connected to one end of the capacitor C2 and the input end of the separated band-pass filtering module, and the other end of the capacitor C2 is grounded.

6. The separated band-pass filter circuit according to claim 1, wherein the rf module comprises a pi-type filtering branch and an antenna interface, an input end of the pi-type filtering branch is electrically connected to an output end of the separated band-pass filtering module, and an output end of the pi-type filtering branch is electrically connected to the antenna interface.

7. The separated band-pass filter circuit according to claim 6, wherein the pi-type filtering branch comprises a capacitor C8, an inductor L5 and a capacitor C9, one end of the capacitor C8 is electrically connected to the output end of the separated band-pass filtering module and one end of the inductor, the other end of the capacitor C8 is grounded, the other end of the inductor L5 is electrically connected to one end of the capacitor C9 and the interface, and the other end of the capacitor C9 is grounded.