CN207926532U - A kind of ultra-low noise amplifier - Google Patents
A kind of ultra-low noise amplifier Download PDFInfo
- Publication number
- CN207926532U CN207926532U CN201820184025.5U CN201820184025U CN207926532U CN 207926532 U CN207926532 U CN 207926532U CN 201820184025 U CN201820184025 U CN 201820184025U CN 207926532 U CN207926532 U CN 207926532U
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- amplifier
- filter
- matching circuit
- output end
- output
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Abstract
The utility model discloses a kind of ultra-low noise amplifiers, including input matching circuit, power splitter, synthesizer, first filter, second filter, third filter, first amplifier, second amplifier, third amplifier, output matching circuit and direct current tie line, the input terminal of the output end connection power splitter of the input matching circuit, the output end of power splitter is separately connected first filter and second filter, first filter and second filter are connect after being connect respectively with the first amplifier and the second amplifier with the input terminal of synthesizer, the output end of synthesizer successively with third filter, third amplifier is connected with output matching circuit, the input terminal of the direct current tie line and the output end of output matching circuit connect, the output end of direct current tie line and the first amplifier, second amplifier is connected with third amplifier.The utility model is simple in structure, and practical reliable, performance is stablized.
Description
Technical field
The utility model is related to a kind of amplifier, more particularly to a kind of ultra-low noise amplifier.
Background technology
In a communications system, low-noise amplifier is the first order active circuit of receiver front end in communication system, is realized
The small-signal amplification that antenna is received, gives late-class circuit and is handled.Currently, wireless communication multiband, multi-standard, multimode
The development trend of formula, it is desirable that low-noise amplifier will not only consider complete to connect various frequency range wireless signals in design
The functions such as retractable is big, and require it that can cover multiple communications bands, compatible different communication standard.Existing low noise is put
Big device has the disadvantage that：Noise is higher, in the presence of a harsh environment penalty.
Utility model content
The purpose of this utility model is that offer is a kind of simple in structure, and practical reliable, the ultra-low noise that performance is stablized is put
Big device.
To achieve the goals above, the technical solution adopted in the utility model is such：The super-low noise of the utility model
Acoustic amplifier, including input matching circuit, power splitter, synthesizer, first filter, second filter, third filter, first
Amplifier, the second amplifier, third amplifier, output matching circuit and direct current tie line, the input matching circuit it is defeated
Outlet connects the input terminal of power splitter, and the output end of power splitter is separately connected first filter and second filter, the first filtering
Device and second filter are connect after being connect respectively with the first amplifier and the second amplifier with the input terminal of synthesizer, synthesizer
Output end is connect with third filter, third amplifier and output matching circuit successively, the input terminal of the direct current tie line
It is connect with the output end of output matching circuit, the output end of direct current tie line and the first amplifier, the second amplifier and third
Amplifier connects.
Preferably, being connected separately with antistatic circuit on the input matching circuit and output matching circuit.
Compared with prior art, the utility model has the advantage of：The utility model is simple in structure, practical reliable, performance
Stablize, signal branch is handled, bandwidth has been expanded, multistage is amplified, filters, and improves gain, and noise coefficient is low, in band
Flatness is good.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model.
Specific implementation mode
Below in conjunction with attached drawing, the utility model is described in further detail.
Referring to Fig. 1, the ultra-low noise amplifier of the utility model, including input matching circuit, power splitter, synthesizer,
One filter, second filter, third filter, the first amplifier, the second amplifier, third amplifier, output matching circuit
And direct current tie line, the input terminal of the output end connection power splitter of the input matching circuit, the output end difference of power splitter
Connect first filter and second filter, first filter and second filter respectively with the first amplifier and the second amplifier
Connect with the input terminal of synthesizer after connection, the output end of synthesizer successively with third filter, third amplifier and output
It is connected with circuit, the input terminal of the direct current tie line and the output end of output matching circuit connect, direct current tie line
Output end is connect with the first amplifier, the second amplifier and third amplifier, the input matching circuit and output matching circuit
On be connected separately with antistatic circuit.
Signal is divided into two-way after input matching circuit matches, into power splitter, per filtered device filtering all the way, then
Amplify by amplifier, two paths of signals is after synthesizer synthesizes all the way, then the filtering of filtered device, through output after amplifier amplification
With circuit output；Direct current tie line isolates direct current signal, is that the first amplifier, the second amplifier and third amplifier supply
Electricity.The utility model is simple in structure, practical reliable, and performance is stablized, and signal branch is handled, and has expanded bandwidth, it is multistage into
Row amplification, filtering, improve gain, noise coefficient is low, inband flatness is good；Antistatic circuit is connected, there is antistatic effect, it can
By property height, environmental suitability is strong.
Claims (2)
1. a kind of ultra-low noise amplifier, it is characterised in that：Including input matching circuit, power splitter, synthesizer, the first filtering
Device, second filter, third filter, the first amplifier, the second amplifier, third amplifier, output matching circuit and direct current
Feed circuit, the input terminal of the output end connection power splitter of the input matching circuit, the output end of power splitter are separately connected the
After one filter and second filter, first filter and second filter are connect with the first amplifier and the second amplifier respectively
Connect with the input terminal of synthesizer, the output end of synthesizer successively with third filter, third amplifier and output matching circuit
Connection, the input terminal of the direct current tie line and the output end of output matching circuit connect, the output end of direct current tie line
It is connect with the first amplifier, the second amplifier and third amplifier.
2. ultra-low noise amplifier according to claim 1, it is characterised in that：The input matching circuit and output match
Antistatic circuit is connected separately on circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820184025.5U CN207926532U (en) | 2018-02-02 | 2018-02-02 | A kind of ultra-low noise amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820184025.5U CN207926532U (en) | 2018-02-02 | 2018-02-02 | A kind of ultra-low noise amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207926532U true CN207926532U (en) | 2018-09-28 |
Family
ID=63603081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820184025.5U Active CN207926532U (en) | 2018-02-02 | 2018-02-02 | A kind of ultra-low noise amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207926532U (en) |
-
2018
- 2018-02-02 CN CN201820184025.5U patent/CN207926532U/en active Active
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| GR01 | Patent grant |