CN218772032U - Wireless signal filter - Google Patents
Wireless signal filter Download PDFInfo
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- CN218772032U CN218772032U CN202223170750.2U CN202223170750U CN218772032U CN 218772032 U CN218772032 U CN 218772032U CN 202223170750 U CN202223170750 U CN 202223170750U CN 218772032 U CN218772032 U CN 218772032U
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- operational amplifier
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- resistor
- wireless signal
- capacitor
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Abstract
The utility model discloses a wireless signal filter, including the PCBA board, the circuit coupling on the PCBA board has three operational amplifier, and wireless signal's input is connected with first operational amplifier's inverting input electricity, first operational amplifier's syntropy input is connected with resistance R1 electricity back ground connection, and second operational amplifier's syntropy input is connected with first operational amplifier's output electricity, and second operational amplifier's reverse input end is connected with third operational amplifier's inverting input electricity, is connected with second operational amplifier's forward input electricity behind a resistance R7 electricity after third operational amplifier's the output electricity, is connected with second operational amplifier's output electricity behind a resistance R9 electricity after third operational amplifier's the forward input electricity, exports wireless signal after second operational amplifier's the output electricity is connected an electric capacity C6.
Description
Technical Field
The utility model relates to a signal filtering field specifically is a wireless signal filter.
Background
The filter is a filter circuit consisting of a capacitor, an inductor and a resistor. The filter can effectively filter the frequency point of the specific frequency in the power line or the frequencies except the frequency point to obtain a power signal of the specific frequency or eliminate the power signal after the specific frequency, but the existing filter is difficult to realize accurate filtering when the specific frequency point is filtered again in the bandwidth range.
SUMMERY OF THE UTILITY MODEL
In order to achieve the above object, the utility model provides a following technical scheme:
the wireless signal filter comprises a PCBA board, wherein three operational amplifiers are coupled to a circuit on the PCBA board, the input end of a wireless signal is electrically connected with the inverting input end of a first operational amplifier, the homodromous input end of the first operational amplifier is electrically connected with a resistor R1 and then grounded, the homodromous input end of a second operational amplifier is electrically connected with the output end of the first operational amplifier, the inverting input end of the second operational amplifier is electrically connected with the inverting input end of a third operational amplifier, the output end of the third operational amplifier is electrically connected with a resistor R7 and then electrically connected with the forward input end of the second operational amplifier, the forward input end of the third operational amplifier is electrically connected with a resistor R9 and then electrically connected with the output end of the second operational amplifier, and the output end of the second operational amplifier is electrically connected with a capacitor C6 and then outputs the wireless signal.
Further, a resistor R3 and a resistor R4 are electrically connected between the inverting input terminal of the first operational amplifier and the input terminal of the wireless signal, a branch is arranged on a line between the resistor R3 and the resistor R4, the branch is electrically connected with the output terminal of the first operational amplifier, a capacitor C1 is arranged on the branch, a branch is arranged on a line between the resistor R4 and the inverting input terminal of the first operational amplifier, a capacitor C2 is arranged on the branch, and the output terminal of the capacitor C2 is grounded.
Further, the same-direction input end of the first operational amplifier is electrically connected with the resistor R2 and then electrically connected with the output end of the first operational amplifier.
Furthermore, the same-direction input end of the second operational amplifier is electrically connected with the output end of the first operational amplifier through a capacitor C3 and a capacitor C4, and the positive-direction input end of the third operational amplifier is electrically connected with a resistor R10 and then is electrically connected with the input end of the capacitor C4.
Furthermore, the output end of the capacitor C4 is electrically connected with a resistor R6 and then grounded, and a resistor R5 is also electrically connected between the input end of the capacitor C4 and the input end of the resistor R6.
Compared with the prior art, the beneficial effects of the utility model are as follows:
the filter bandwidth in a specific range can be increased in a circuit through coupling three operational amplifiers, specific frequency points can be accurately filtered in the specific range, and the filtering function of the filter is enriched.
Drawings
Fig. 1 is a schematic circuit diagram of the present application.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
The utility model discloses a wireless signal filter, as shown in figure 1, wireless signal filter, including the PCBA board, circuit coupling on the PCBA board has three operational amplifier, and wireless signal's input is connected with first operational amplifier's inverting input electricity, first operational amplifier's syntropy input is connected with resistance R1 electricity back ground connection, and second operational amplifier's syntropy input is connected with first operational amplifier's output electricity, and second operational amplifier's reverse input end is connected with third operational amplifier's inverting input electricity, is connected with second operational amplifier's forward input electricity behind the output electricity of third operational amplifier's the resistance R7, is connected with second operational amplifier's output electricity behind the third operational amplifier's the forward input electricity, and the output electricity of second operational amplifier is connected behind a resistance R9, with wireless signal output behind a electric capacity C6. This application can increase the wave filter bandwidth in the specific range in the circuit the inside through three operational amplifier of coupling, can also accurately filter specific frequency point in the specific range, richenes the filtering capability of wave filter.
Preferably, a resistor R3 and a resistor R4 are electrically connected between the inverting input terminal of the first operational amplifier and the input terminal of the wireless signal, a branch is arranged on a line between the resistor R3 and the resistor R4, the branch is electrically connected with the output terminal of the first operational amplifier, a capacitor C1 is arranged on the branch, a branch is arranged on a line between the resistor R4 and the inverting input terminal of the first operational amplifier, a capacitor C2 is arranged on the branch, and the output terminal of the capacitor C2 is grounded.
Preferably, the non-inverting input terminal of the first operational amplifier is electrically connected to the resistor R2 and then electrically connected to the output terminal of the first operational amplifier.
Preferably, the capacitor C3 and the capacitor C4 are electrically connected between the equidirectional input end of the second operational amplifier and the output end of the first operational amplifier, and the forward input end of the third operational amplifier is electrically connected with the input end of the capacitor C4 after being electrically connected with the resistor R10.
Preferably, the output end of the capacitor C4 is electrically connected to a resistor R6 and then grounded, and a resistor R5 is further electrically connected between the input end of the capacitor C4 and the input end of the resistor R6.
In a specific embodiment, the present invention discloses a wireless signal filter, as shown in fig. 1, the wireless signal filter includes a PCBA board, three operational amplifiers are coupled to a circuit on the PCBA board, an input end of a wireless signal is electrically connected to an inverting input end of a first operational amplifier, a same-direction input end of the first operational amplifier is electrically connected to a resistor R1 and then grounded, a same-direction input end of a second operational amplifier is electrically connected to an output end of the first operational amplifier, an inverting input end of the second operational amplifier is electrically connected to an inverting input end of a third operational amplifier, an output end of the third operational amplifier is electrically connected to a resistor R7 and then electrically connected to a forward input end of the second operational amplifier, a forward input end of the third operational amplifier is electrically connected to a resistor R9 and then electrically connected to an output end of the second operational amplifier, and an output end of the second operational amplifier is electrically connected to a capacitor C6 and then outputs the wireless signal; a resistor R3 and a resistor R4 are electrically connected between the inverting input end of the first operational amplifier and the input end of the wireless signal, a branch circuit is arranged on a line between the resistor R3 and the resistor R4 and is electrically connected with the output end of the first operational amplifier, a capacitor C1 is arranged on the branch circuit, a branch circuit is arranged on a line between the resistor R4 and the inverting input end of the first operational amplifier, a capacitor C2 is arranged on the branch circuit, and the output end of the capacitor C2 is grounded; the homodromous input end of the first operational amplifier is electrically connected with the resistor R2 and then electrically connected with the output end of the first operational amplifier; the same-direction input end of the second operational amplifier is electrically connected with the output end of the first operational amplifier through a capacitor C3 and a capacitor C4, and the positive-direction input end of the third operational amplifier is electrically connected with a resistor R10 and then is electrically connected with the input end of the capacitor C4; the output end of the capacitor C4 is electrically connected with a resistor R6 and then grounded, and a resistor R5 is also electrically connected between the input end of the capacitor C4 and the input end of the resistor R6. The filter bandwidth in a specific range can be increased in a circuit through coupling three operational amplifiers, specific frequency points can be accurately filtered in the specific range, and the filtering function of the filter is enriched.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The wireless signal filter is characterized by comprising a PCBA board, wherein three operational amplifiers are coupled to a circuit on the PCBA board, an input end of a wireless signal is electrically connected with an inverting input end of a first operational amplifier, a same-direction input end of the first operational amplifier is electrically connected with a resistor R1 and then grounded, a same-direction input end of a second operational amplifier is electrically connected with an output end of the first operational amplifier, an inverting input end of the second operational amplifier is electrically connected with an inverting input end of a third operational amplifier, an output end of the third operational amplifier is electrically connected with a resistor R7 and then electrically connected with a forward input end of the second operational amplifier, a forward input end of the third operational amplifier is electrically connected with a resistor R9 and then electrically connected with an output end of the second operational amplifier, and an output end of the second operational amplifier is electrically connected with a capacitor C6 and then outputs the wireless signal.
2. The wireless signal filter according to claim 1, wherein a resistor R3 and a resistor R4 are electrically connected between the inverting input terminal of the first operational amplifier and the input terminal of the wireless signal, a branch is provided on a line between the resistor R3 and the resistor R4, the branch is electrically connected to the output terminal of the first operational amplifier, a capacitor C1 is provided on the branch, a branch is provided on a line between the resistor R4 and the inverting input terminal of the first operational amplifier, a capacitor C2 is provided on the branch, and the output terminal of the capacitor C2 is grounded.
3. The wireless signal filter of claim 2, wherein the non-inverting input of the first operational amplifier is electrically connected to the resistor R2 and then to the output of the first operational amplifier.
4. The wireless signal filter of claim 3, wherein the capacitor C3 and the capacitor C4 are electrically connected between the non-inverting input terminal of the second operational amplifier and the output terminal of the first operational amplifier, and the positive input terminal of the third operational amplifier is electrically connected to the input terminal of the capacitor C4 after being electrically connected to a resistor R10.
5. The wireless signal filter of claim 4, wherein the output terminal of the capacitor C4 is electrically connected to a resistor R6 and then grounded, and a resistor R5 is further electrically connected between the input terminal of the capacitor C4 and the input terminal of the resistor R6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223170750.2U CN218772032U (en) | 2022-11-29 | 2022-11-29 | Wireless signal filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223170750.2U CN218772032U (en) | 2022-11-29 | 2022-11-29 | Wireless signal filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218772032U true CN218772032U (en) | 2023-03-28 |
Family
ID=85675302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223170750.2U Active CN218772032U (en) | 2022-11-29 | 2022-11-29 | Wireless signal filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218772032U (en) |
-
2022
- 2022-11-29 CN CN202223170750.2U patent/CN218772032U/en active Active
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