CN209435193U - A kind of low noise amplifier circuit - Google Patents
A kind of low noise amplifier circuit Download PDFInfo
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- CN209435193U CN209435193U CN201920234543.8U CN201920234543U CN209435193U CN 209435193 U CN209435193 U CN 209435193U CN 201920234543 U CN201920234543 U CN 201920234543U CN 209435193 U CN209435193 U CN 209435193U
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- amplifier
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- sgl0622z
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Abstract
The utility model provides a kind of low noise amplifier circuit, comprising: first order amplifier, first order match circuit, first order filter, second level amplifier, second level match circuit, third level amplifier, third level filter；The first order amplifier is SGL0622Z amplifier chip, and first order match circuit and first order filter are connected between the OUT pin of SGL0622Z and the IN pin of second level amplifier；The second level amplifier chip is SGL0622Z amplifier chip, and second level match circuit is connected between the OUT pin of SGL0622Z and the IN pin of third level amplifier；The third level amplifier chip is SPF5043Z amplifier chip, and third level filter is connected to the OUT pin of SPF5043Z.Above-mentioned low noise amplifier circuit has many advantages, such as that broadband, low noise, High Linear, delay stability of time are high, flatness is good.
Description
Technical field
The utility model relates to a kind of low noise amplifier circuits.
Background technique
Low noise amplifier circuit be Modern wireless communication, radar, electronic warfare system etc. application in one it is very important
Component is usually used in receiving system front end, inhibits noise jamming while amplified signal, improves system sensitivity.Low noise is put
Big circuit performance quality determines the signal quality of receiver channel.With development communication technologies, to low noise amplifier circuit
Performance requirement is higher and higher, especially satellite communication field, and since the energy limits on satellite, transmission power can not be improved very much,
Terrestrial receiving antenna gain be also it is relatively-stationary, will to receiver low noise amplifier circuit performance propose rigors.
Utility model content
Technical problem underlying to be solved in the utility model is to provide a kind of low noise amplifier circuit, have broadband,
The advantages that low noise, High Linear, delay stability of time are high, flatness is good, meets satellite receiver multimode multi-frequency point demand.
In order to solve the above technical problems, the utility model provides a kind of low noise amplifier circuit, comprising: the first order
Amplifier, first order match circuit, first order filter, second level amplifier, second level match circuit, third level amplifier,
Third level filter；
The first order amplifier is SGL0622Z amplifier chip, and first order match circuit is connected with first order filter
Between the OUT pin of SGL0622Z and the IN pin of second level amplifier；
The second level amplifier chip is SGL0622Z amplifier chip, and second level match circuit is connected to SGL0622Z
OUT pin and third level amplifier IN pin between；
The third level amplifier chip is SPF5043Z amplifier chip, and third level filter is connected to SPF5043Z's
OUT pin.
In a preferred embodiment: shown first order match circuit includes capacitor C11, and one end is connected to SGL0622Z's
OUT pin, the other end connect resistance R2；The both ends of resistance R2 pass through resistance R3 and R4 ground connection respectively.
In a preferred embodiment: the first order filter includes inductance L4, and one end connects resistance R2, and the other end connects
It is connected to the IN pin of second level amplifier；
Inductance L4 and capacitor C9 are in parallel, and the both ends of inductance L4 pass through capacitor C18 and C19 ground connection respectively.
In a preferred embodiment: the second level match circuit includes capacitor C12, and one end is connected to SGL0622Z's
OUT pin, the other end are connected to the IN pin of third level amplifier by the resistance R1 and capacitor C17 that are connected in series；
The both ends of resistance R1 pass through resistance R5 and R6 ground connection respectively.
In a preferred embodiment: the third level filter circuit includes capacitor C15, and one section is connected to SPF5043Z's
OUT pin, the other end is by inductance L5 and capacitor the C16 output being connected in series, and the inductance L5 is in parallel with capacitor C10, inductance
The both ends of L5 pass through capacitor C20 and C21 ground connection respectively.
Compared to the prior art, the technical solution of the utility model have it is following the utility model has the advantages that
1. having many advantages, such as that broadband, low noise, High Linear, delay stability of time are high, flatness is good, satellite reception is met
Machine multimode multi-frequency point demand.
2. introducing match circuit between cascade amplifier grade realizes the low noise sonic system in broadband as attenuator, filter
Number.
Detailed description of the invention
Fig. 1 is the circuit diagram of first order amplifier and its filter and match circuit in the preferred embodiment in the utility model；
Fig. 2 is the circuit diagram of second level amplifier and its filter and match circuit in the preferred embodiment in the utility model；
Fig. 3 is the circuit diagram of third level amplifier and its filter and match circuit in the preferred embodiment in the utility model；
Specific embodiment
The utility model is described further below in conjunction with the drawings and specific embodiments.
With reference to Fig. 1-Fig. 3, the utility model provides a kind of low noise amplifier circuit, comprising: first order amplifier, first
Grade match circuit, first order filter, second level amplifier, second level match circuit, third level amplifier, third level filtering
Device；
The first order amplifier is SGL0622Z amplifier chip, and first order filter is connected to the OUT of SGL0622Z
Pin, first order match circuit are connected between the OUT pin of SGL0622Z and the IN pin of second level amplifier；
The second level amplifier chip is SGL0622Z amplifier chip, and second level filter is connected to SGL0622Z's
OUT pin, second level match circuit are connected between the OUT pin of SGL0622Z and the IN pin of third level amplifier；
The third level amplifier chip is SPF5043Z amplifier chip, and third level filter is connected to SPF5043Z's
OUT pin, second level match circuit are connected to the OUT pin of SGL0622Z.
The first order, second level amplifier think the amplifier far up to the model SGL0622Z of Microtronic A/S using the U.S.
Chip, working frequency range are 100MHz-4GHz, and gain is 28.5dB, and noise coefficient is 1.5dB, what third level amplifier used
It is that the amplifier chip for far reaching the model SPF5043Z of Microtronic A/S is thought in the U.S., working frequency is 400MHz-3GHz, is increased
Benefit is 18.5dB, and noise coefficient is 0.6dB, and first order filter and third level filter ensure that enough Out-of-band rejections.
In order to meet the needs of high-gain, for amplifier when being designed, there are enough surpluses for gain, according to above-mentioned
The gain of three amplifiers can be seen that the overall gain of this low noise amplifier circuit is 75.5dB, and amplifier enters full in order to prevent
And point, between the first order and second level amplifier, it joined match circuit between the second level and third level amplifier, user can be with
Decay according to their own needs to gain.
Specifically, the first order amplifier is SGL0622Z amplifier chip, first order match circuit and the first order
Filter is connected between the OUT pin of SGL0622Z and the IN pin of second level amplifier；
The second level amplifier chip is SGL0622Z amplifier chip, and second level match circuit is connected to SGL0622Z
OUT pin and third level amplifier IN pin between；
The third level amplifier chip is SPF5043Z amplifier chip, and third level filter is connected to SPF5043Z's
OUT pin.
Shown first order match circuit includes capacitor C11, and one end is connected to the OUT pin of SGL0622Z, and the other end connects
Connecting resistance R2；The both ends of resistance R2 pass through resistance R3 and R4 ground connection respectively.
The first order filter includes inductance L4, and one end connects resistance R2, and the other end is connected to second level amplifier
IN pin；
Inductance L4 and capacitor C9 are in parallel, and the both ends of inductance L4 pass through capacitor C18 and C19 ground connection respectively.
The second level match circuit includes capacitor C12, and one end is connected to the OUT pin of SGL0622Z, and the other end is logical
Cross the IN pin that the resistance R1 being connected in series and capacitor C17 is connected to third level amplifier；
The both ends of resistance R1 pass through resistance R5 and R6 ground connection respectively.
The third level filter circuit includes capacitor C15, and one section is connected to the OUT pin of SPF5043Z, and the other end is logical
The inductance L5 being connected in series and capacitor C16 output is crossed, the inductance L5 is in parallel with capacitor C10, and the both ends of inductance L5 pass through respectively
Capacitor C20 and C21 ground connection.
Above-mentioned low noise amplifier circuit has broadband, low noise, High Linear, delay stability of time are high, flatness is good etc.
Advantage meets satellite receiver multimode multi-frequency point demand.And it is real that match circuit, filter are introduced between cascade amplifier grade
The low-noise factor in broadband is showed.
The above is only the preferred embodiments of the utility model, but the scope of the utility model is without being limited thereto, the skill of this field
Art personnel are easily envisaged that variation disclosed in the utility model or technical scope.Alternative solution is intended to cover practical at this
In novel range.Therefore, the protection scope of the utility model should be determined by the scope of the claims.
Claims (5)
1. a kind of low noise amplifier circuit, characterized by comprising: first order amplifier, first order match circuit, first order filter
Wave device, second level amplifier, second level match circuit, third level amplifier, third level filter；
The first order amplifier is SGL0622Z amplifier chip, and first order match circuit and first order filter are connected to
Between the OUT pin of SGL0622Z and the IN pin of second level amplifier；
The second level amplifier chip is SGL0622Z amplifier chip, and second level match circuit is connected to SGL0622Z's
Between OUT pin and the IN pin of third level amplifier；
The third level amplifier chip is SPF5043Z amplifier chip, and third level filter is connected to the OUT of SPF5043Z
Pin.
2. a kind of low noise amplifier circuit according to claim 1, it is characterised in that: shown first order match circuit includes
Capacitor C11, one end are connected to the OUT pin of SGL0622Z, and the other end connects resistance R2；The both ends of resistance R2 pass through electricity respectively
Hinder R3 and R4 ground connection.
3. a kind of low noise amplifier circuit according to claim 2, it is characterised in that: the first order filter includes electricity
Feel L4, one end connects resistance R2, and the other end is connected to the IN pin of second level amplifier；
Inductance L4 and capacitor C9 are in parallel, and the both ends of inductance L4 pass through capacitor C18 and C19 ground connection respectively.
4. a kind of low noise amplifier circuit according to claim 1, it is characterised in that: the second level match circuit includes
Capacitor C12, one end are connected to the OUT pin of SGL0622Z, and the other end is connected by the resistance R1 being connected in series with capacitor C17
To the IN pin of third level amplifier；
The both ends of resistance R1 pass through resistance R5 and R6 ground connection respectively.
5. a kind of low noise amplifier circuit according to claim 1, it is characterised in that: the third level filter circuit includes
Capacitor C15, one section are connected to the OUT pin of SPF5043Z, and the other end is defeated by the inductance L5 and capacitor C16 being connected in series
Out, the inductance L5 is in parallel with capacitor C10, and the both ends of inductance L5 pass through capacitor C20 and C21 ground connection respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920234543.8U CN209435193U (en) | 2019-02-25 | 2019-02-25 | A kind of low noise amplifier circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920234543.8U CN209435193U (en) | 2019-02-25 | 2019-02-25 | A kind of low noise amplifier circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209435193U true CN209435193U (en) | 2019-09-24 |
Family
ID=67978124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920234543.8U Active CN209435193U (en) | 2019-02-25 | 2019-02-25 | A kind of low noise amplifier circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209435193U (en) |
-
2019
- 2019-02-25 CN CN201920234543.8U patent/CN209435193U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220110 Address after: 030000 No. 351, TIYU Road, Taiyuan City, Shanxi Province Patentee after: NORTH AUTOMATIC CONTROL TECHNOLOGY INSTITUTE Address before: 361000 No. 86, Xiyuan Road, Xinyang street, Haicang District, Xiamen City, Fujian Province Patentee before: XIAMEN JIUHUA COMMUNICATION EQUIPMENT FACTORY |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220429 Address after: 361000 No. 86, Xiyuan Road, Xinyang street, Haicang District, Xiamen City, Fujian Province Patentee after: XIAMEN JIUHUA COMMUNICATION EQUIPMENT FACTORY Address before: 030000 No. 351, TIYU Road, Taiyuan City, Shanxi Province Patentee before: NORTH AUTOMATIC CONTROL TECHNOLOGY INSTITUTE |