CN106100607A - A kind of passive filter - Google Patents
A kind of passive filter Download PDFInfo
- Publication number
- CN106100607A CN106100607A CN201610634710.9A CN201610634710A CN106100607A CN 106100607 A CN106100607 A CN 106100607A CN 201610634710 A CN201610634710 A CN 201610634710A CN 106100607 A CN106100607 A CN 106100607A
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- China
- Prior art keywords
- resistance
- electric capacity
- connects
- operational amplifier
- common port
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/46—One-port networks
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Abstract
The invention discloses a kind of passive filter, including the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, the 5th resistance R5, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, operational amplifier A, alternating current power supply Vi and DC source Vo, one end of described first electric capacity C1 connects described second resistance R2 and the common port of described 3rd resistance R3；One end of described second electric capacity C2 connects described 3rd resistance R3 and the common port of described operational amplifier A；The other end of described 3rd electric capacity C3 connects the first resistance R1 and the common port of the second resistance R2；The outfan of described operational amplifier A connects described DC source Vo.Passive filter disclosed in this invention, it is possible to the signal in microwave communication has been carried out double-smoothing, reaches preferably to filter unwanted signal of communication in microwave communication, makes the transmission signal finally received more accurate, also will not produce resonance phenomena.
Description
Technical field
The present invention relates to filter field, especially a kind of passive filter.
Background technology
Wave filter refers to electric component harmonic wave being reduced or eliminated to effect on power system.Wave filter is a kind of for eliminating
The device of interference signal, obtains pure unidirectional current by input or output through filtration.Frequency or this frequency to characteristic frequency
Frequency beyond Dian carries out the circuit effectively filtered out, it is simply that wave filter, and its function obtains a characteristic frequency exactly or eliminates one
Individual characteristic frequency.Field of microwave communication it is frequently necessary to the electromagnetic wave of transmission is filtered, retain wavelength at 0.1 millimeter extremely
Electromagnetic wave between 1 meter, is also required to use filter circuit in this process.Existing filter circuit characteristic is by systematic parameter
Impact is big, can only eliminate specific a few subharmonic, and some subharmonic can produce amplification, even can produce resonance existing
As, it is unfavorable for microwave communication.It addition, also have filter circuit will not produce resonance phenomena, but integrated transporting discharging broadband is limited, leads
Cause that the operating frequency on filter circuit is difficult to do is the highest.And microwave communication due to its bandwidth, capacity is big, it is various to may be used for
The transmission of telecommunication service, is constantly widely used, and existing filter circuit all exists the biggest defect, is unfavorable for microwave
The development of communication.
Summary of the invention
Instant invention overcomes the deficiencies in the prior art, it is provided that the filter circuit of efficient filtering, microwave signal first passes through passive
Filter filtering, passes through active power filtering the most again, it is achieved twice filtering, and transmission signal is more accurate, also will not produce resonance phenomena,
Improve the quality of microwave communication.
For solving above-mentioned technical problem, the present invention by the following technical solutions:
A kind of passive filter, including the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, the 5th electricity
Resistance R5, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, operational amplifier A, alternating current power supply Vi and DC source Vo, described
Alternating current power supply Vi, described first resistance R1, described second resistance R2, described 3rd resistance R3 and described operational amplifier A same
It is sequentially connected in series to input；One end of described first electric capacity C1 connects described second resistance R2's and described 3rd resistance R3
Common port, the other end connects the outfan of described operational amplifier A；One end of described second electric capacity C2 connects described 3rd resistance
R3 and the common port of described operational amplifier A, the other end of described second electric capacity C2 connects one end of described 3rd electric capacity C3；Institute
The other end stating the 3rd electric capacity C3 connects the first resistance R1 and the common port of the second resistance R2；One end of described 5th resistance R5 is even
Connect described alternating current power supply Vi and the common port of described first resistance R1, described 5th resistance R5, described second electric capacity C2 and described
3rd electric capacity C3 ground connection；Described 4th resistance R4 connects the reverse input end of described operational amplifier A and described operational amplifier A
Outfan, the outfan of described operational amplifier A connects described DC source Vo；The size of described 3rd electric capacity C3 is 0.05
Microfarad.
Preferably, the resistance of described second resistance R2 and described 3rd resistance R3 is equal, and the size of resistance is 100 kilo-ohms
Nurse.
Preferably, the resistance of the described 4th resistance R4 resistance more than described first resistance R1, described 4th resistance R4's
The resistance resistance less than described second resistance R2.
Preferably, the resistance of described second resistance R2 is 10 times of resistance of described first resistance R1.
Preferably, in described first electric capacity C1, described second electric capacity C2 and described 3rd electric capacity C3, the 3rd electric capacity C3 capacity
Minimum, the first electric capacity C1 capacity is maximum.
The invention has the beneficial effects as follows:
Signal in microwave communication, by arranging passive filtering and active power filtering, has been carried out double-smoothing, has reached by the present invention
To preferably filtering unwanted signal of communication in microwave communication, make the transmission signal finally received more accurate, also will not produce
Raw resonance phenomena.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the passive filter of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings, the detailed description of the invention of the present invention is described in further detail.
A kind of passive filter as shown in Figure 1, including the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th electricity
Resistance R4, the 5th resistance R5, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, operational amplifier A, alternating current power supply Vi and direct current
Power supply Vo, described alternating current power supply Vi, described first resistance R1, described second resistance R2, described 3rd resistance R3 and described computing
The input in the same direction of amplifier A is sequentially connected in series；One end of described first electric capacity C1 connects described second resistance R2 and described
The common port of the 3rd resistance R3, the other end connects the outfan of described operational amplifier A；One end of described second electric capacity C2 connects
Described 3rd resistance R3 and the common port of described operational amplifier A, the other end of described second electric capacity C2 connects described 3rd electricity
Hold one end of C3；The other end of described 3rd electric capacity C3 connects the first resistance R1 and the common port of the second resistance R2；Described 5th
One end of resistance R5 connects described alternating current power supply Vi and the common port of described first resistance R1, described 5th resistance R5, described the
Two electric capacity C2 and described 3rd electric capacity C3 ground connection；Described 4th resistance R4 connect described operational amplifier A reverse input end and
The outfan of described operational amplifier A, the outfan of described operational amplifier A connects described DC source Vo；Described 3rd electricity
The size holding C3 is 0.05 microfarad, and the resistance of described second resistance R2 and described 3rd resistance R3 is equal, and the size of resistance is 100
Kilohm.
The resistance of the described 4th resistance R4 resistance more than described first resistance R1, the resistance of described 4th resistance R4 is less than
The resistance of described second resistance R2.
The resistance of described second resistance R2 is 10 times of the resistance of described first resistance R1.
In described first electric capacity C1, described second electric capacity C2 and described 3rd electric capacity C3, the capacity of the 3rd electric capacity C3 is minimum,
The capacity of the first electric capacity C1 is maximum.
R1 and C3 forms passive filtering, R2, R3, C1, C2 and operational amplifier composition active power filtering, thus realizes twice filter
Ripple, reaches preferably to filter unwanted signal of communication in microwave communication, makes the transmission signal finally received more accurate, the most not
Resonance phenomena can be produced.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For Yuan, on the premise of without departing from the technology of the present invention principle, it is also possible to make some improvement, these improvement also should be regarded as this
Bright protection domain.
Claims (3)
1. a passive filter, it is characterised in that: include the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance
R4, the 5th resistance R5, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, operational amplifier A, alternating current power supply Vi and unidirectional current
Source Vo, described alternating current power supply Vi, described first resistance R1, described second resistance R2, described 3rd resistance R3 and described computing are put
The input in the same direction of big device A is sequentially connected in series；One end of described first electric capacity C1 connects described second resistance R2 and described the
The common port of three resistance R3, the other end connects the outfan of described operational amplifier A；One end of described second electric capacity C2 connects institute
Stating the 3rd resistance R3 and the common port of described operational amplifier A, the other end of described second electric capacity C2 connects described 3rd electric capacity
One end of C3；The other end of described 3rd electric capacity C3 connects the first resistance R1 and the common port of the second resistance R2；Described 5th electricity
One end of resistance R5 connects described alternating current power supply Vi and the common port of described first resistance R1, described 5th resistance R5, described second
Electric capacity C2 and described 3rd electric capacity C3 ground connection；Described 4th resistance R4 connects reverse input end and the institute of described operational amplifier A
Stating the outfan of operational amplifier A, the outfan of described operational amplifier A connects described DC source Vo；Described 3rd electric capacity
The size of C3 is 0.05 microfarad.
Passive filter the most according to claim 1, it is characterised in that: described second resistance R2 and described 3rd resistance R3
Resistance equal, the size of resistance is 100 kilohms.
Passive filter the most according to claim 1 and 2, it is characterised in that: the resistance of described second resistance R2 is described
10 times of the resistance of the first resistance R1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610634710.9A CN106100607A (en) | 2016-08-04 | 2016-08-04 | A kind of passive filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610634710.9A CN106100607A (en) | 2016-08-04 | 2016-08-04 | A kind of passive filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106100607A true CN106100607A (en) | 2016-11-09 |
Family
ID=57453552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610634710.9A Pending CN106100607A (en) | 2016-08-04 | 2016-08-04 | A kind of passive filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106100607A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103368524A (en) * | 2013-06-17 | 2013-10-23 | 成都荣耀科技有限公司 | Signal conditioning circuit for remote monitoring system of distribution transformer |
| CN103684325A (en) * | 2013-11-28 | 2014-03-26 | 成都位时通科技有限公司 | Filter circuit efficient in filtering |
| CN204119178U (en) * | 2014-09-05 | 2015-01-21 | 徐云鹏 | A kind of intelligent ultra-weak electronic signal low-power consumption filter circuit |
-
2016
- 2016-08-04 CN CN201610634710.9A patent/CN106100607A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103368524A (en) * | 2013-06-17 | 2013-10-23 | 成都荣耀科技有限公司 | Signal conditioning circuit for remote monitoring system of distribution transformer |
| CN103684325A (en) * | 2013-11-28 | 2014-03-26 | 成都位时通科技有限公司 | Filter circuit efficient in filtering |
| CN204119178U (en) * | 2014-09-05 | 2015-01-21 | 徐云鹏 | A kind of intelligent ultra-weak electronic signal low-power consumption filter circuit |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161109 |
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| WD01 | Invention patent application deemed withdrawn after publication |