CN209120141U - A kind of simple LC resonance amplifier installation - Google Patents
A kind of simple LC resonance amplifier installation Download PDFInfo
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- CN209120141U CN209120141U CN201821634445.5U CN201821634445U CN209120141U CN 209120141 U CN209120141 U CN 209120141U CN 201821634445 U CN201821634445 U CN 201821634445U CN 209120141 U CN209120141 U CN 209120141U
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Abstract
A kind of simple LC resonance amplifier installation, including 40dB attenuator module, impedance matching network module, the small signal resonance amplifier module of multi-stage cascade, wideband power amplifer module and AGC module, 40dB attenuator module is made of pin network, the small signal resonance amplifier module of multi-stage cascade is made of seven grades of staggered tuning oscillator amplifier circuits of field-effect tube cascode multi-stage cascade, AGC module is made of plural parallel stage negative-feedback shunt agc circuit, impedance matching network module, the output end of AGC module and wideband power amplifer module is electrically connected with the input terminal of the small signal resonance amplifier module of multi-stage cascade, this simple LC resonance amplifier installation can be realized maximum resonance gain and reach 104.95dB, squareness factor is less than 2, passband fluctuation is less than 2dB, most Large gain can reach 104.95dB, and AGC control range is greater than 50dB, Overall Power Consumption 176mW.
Description
Technical field
The utility model relates to electronic measuring technology fields, and in particular to a kind of simple LC resonance amplifier installation.
Background technique
LC resonance amplifier is mainly made of LC resonance circuit and amplifier, and main function is to screen useful signal
And it amplifies, and noise signal is rejected.It is mainly used in communication device receiver, positioned at the input of receiver
End, if its performance is bad, will directly seriously affect the communication quality of whole system.In practical LC resonance Amplifier Design,
Its resonance frequency, gain, bandwidth and power consumption etc. are required relatively high, it is desirable that while meeting the above technical indicator, difficulty is not
It is small.
Therefore, it is necessary to a kind of high-precision simple LC resonance amplifier installation, which both can guarantee power consumption and gain
While, and its passband can be widened, reduce squareness factor, and can be improved inband flatness.
Utility model content
The purpose of the utility model is to overcome above-mentioned the deficiencies in the prior art, and it is high, practical to provide a kind of cost performance
And simple LC resonance amplifier installation with high accuracy.
To achieve the goals above, the utility model adopts the technical scheme that
A kind of simple LC resonance amplifier installation, including 40dB attenuator module, impedance matching network module, multi-stage cascade
Small signal resonance amplifier module, wideband power amplifer module and AGC module, the 40dB attenuator module is by pin network
It constitutes, the small signal resonance amplifier module of multi-stage cascade is staggered tuning by seven grades of field-effect tube cascode multi-stage cascades
Oscillator amplifier circuit is constituted, and the AGC module is made of plural parallel stage negative-feedback shunt agc circuit, the impedance matching net
The output end of network module, AGC module and wideband power amplifer module with the small signal resonance amplifier module of multi-stage cascade
Input terminal be electrically connected.
It is as above-mentioned technical proposal to further describe:
The output end of the 40dB attenuator module and the input terminal of impedance matching network module are electrically connected.
It is as above-mentioned technical proposal to further describe:
The output end of the impedance matching network module and the input terminal of the small signal resonance amplifier module of multi-stage cascade connect
It connects.
It is as above-mentioned technical proposal to further describe:
The output end of the wideband power amplifer module is also electrically connected with the input terminal of AGC module.
The beneficial effects of the utility model are as follows:
This simple LC resonance amplifier installation structure is simple, and circuit stability is good, can be realized resonance frequency f0=
15MHz, maximum resonance gain reach 104.95dB, 2 Δ f of bandwidth0.7=300kHz, less than 2, passband fluctuation is less than squareness factor
2dB, maximum gain can reach 104.95dB, and AGC control range is greater than 50dB, Overall Power Consumption 176mW.
Detailed description of the invention
Fig. 1 is a kind of system structure connection schematic diagram of simple LC resonance amplifier installation of the utility model；
Fig. 2 is the circuit diagram of the small signal resonance amplifier module of multi-stage cascade in the utility model；
Fig. 3 is the circuit diagram of the utility model middle width strip power amplifier module；
Fig. 4 is the circuit diagram of 40dB attenuator module and impedance matching network module in the utility model.
Marginal data:
1-40dB attenuator module, 2- impedance matching network module, the small signal resonance amplifier module of 3- multi-stage cascade, 4-
Wideband power amplifer module, 5-AGC module.
Specific embodiment
Referring to Fig. 1-4, a kind of simple LC resonance amplifier installation, including 40dB attenuator module 1, impedance matching network mould
The small signal resonance amplifier module 3 of block 2, multi-stage cascade, wideband power amplifer module 4 and AGC module 5,40dB attenuator mould
Block 1 is made of pin network, and the small signal resonance amplifier module 3 of multi-stage cascade is by seven grades of field-effect tube cascode multi-stage cascades
Staggered tuning oscillator amplifier circuit is constituted, and AGC module 5 is made of plural parallel stage negative-feedback shunt agc circuit, impedance matching net
The output end of network module 2, AGC module 5 and wideband power amplifer module 4 with the small signal resonance amplifier mould of multi-stage cascade
The input terminal of block 3 is electrically connected.
The output end of 40dB attenuator module 1 and the input terminal of impedance matching network module 2 are electrically connected, impedance matching net
The output end of network module 2 is connect with the input terminal of the small signal resonance amplifier module 3 of multi-stage cascade, wideband power amplifer module
4 output end is also electrically connected with the input terminal of AGC module 5.
In the present embodiment, referring to fig. 2, the small signal resonance amplifier module 3 of multi-stage cascade uses seven grades of staggered tuning amplifications
Device, loads at different levels are LC resonance circuit, and amplifier tube and load can reduce circuit damage by transformer coupled connection in this way
Consumption, while every grade of gain size can also be determined by regulating winding turn ratio, power supplies at different levels seal in high frequency choke coil, prevent
High-frequency loss and amplifier self-excitation.
In the present embodiment, referring to Fig. 3, level-one broadband power amplifying circuit is set after seven grades of stagger-tuned amplifiers,
Under the premise of meeting power consumption index request, make seven grades of stagger-tuned amplifiers that there is certain carrying load ability, power amplifier
Using Class A working method, load circuit still uses LC resonance circuit, through transformer coupled access RLThe load electricity of=200 Ω
Resistance, meets the requirement of every test, thus, it is possible to substantially reduce circuit Q value so that the frequency band of broadband power amplifying circuit more than
The width of the resonance amplifier of prime can be considered as broad band amplifier, not influence Amplitude Frequency Characteristic, while lower load resistance
Also can step-down amplifier gain, therefore the same level amplifier gain is not high, nor affects on system gain and its stability.
In the present embodiment, referring to Fig. 3-4, the shaping circuit of the 40dB attenuator module and impedance matching network module composition
In, attenuator can be designed to pin network by 40dB requirement, since its characteristic impedance is 50 Ω, need to consider between amplifier
Matching problem, therefore, using all in the high frequency of coil no-load voltage ratio 1:5, and the parallel connection 1.25k Ω resistance on secondary resonant circuits,
It realizes impedance matching, and applied signal voltage is made to promote 5 times.
This simple LC resonance amplifier installation can be realized resonance frequency f0=15MHz, 2 Δ f of bandwidth0.7=300kHz, square
For shape coefficient less than 2, passband fluctuation is less than 2dB, and maximum gain can reach 104.95dB, and AGC control range is greater than 50dB, complete machine function
Consumption is 176mW.
The above is only the preferred embodiment of the utility model, and the protection scope of the utility model is not limited merely to
Above-described embodiment, technical solution belonging to the idea of the present invention belong to the protection scope of the utility model.It should refer to
Out, for those skilled in the art, it is without departing from the principle of the utility model it is several improvement and
Retouching, these improvements and modifications also should be regarded as the protection scope of the utility model.
Claims (4)
1. a kind of simple LC resonance amplifier installation, including 40dB attenuator module (1), impedance matching network module (2), multistage
Cascade small signal resonance amplifier module (3), wideband power amplifer module (4) and AGC module (5), which is characterized in that described
40dB attenuator module (1) is made of pin network, and the small signal resonance amplifier module (3) of multi-stage cascade is imitated by seven grades of fields
Should the staggered tuning oscillator amplifier circuit of pipe cascode multi-stage cascade constitute, the AGC module (5) is by plural parallel stage negative-feedback
Shunt agc circuit is constituted, the impedance matching network module (2), AGC module (5) and wideband power amplifer module (4)
Output end with the input terminal of the small signal resonance amplifier module (3) of multi-stage cascade be electrically connected.
2. a kind of simple LC resonance amplifier installation according to claim 1, it is characterised in that: the 40dB attenuator mould
The output end of block (1) and the input terminal of impedance matching network module (2) are electrically connected.
3. a kind of simple LC resonance amplifier installation according to claim 1, it is characterised in that: the impedance matching network
The output end of module (2) is connect with the input terminal of the small signal resonance amplifier module (3) of multi-stage cascade.
4. a kind of simple LC resonance amplifier installation according to claim 1, it is characterised in that: the broadband power amplification
The output end of device module (4) is also electrically connected with the input terminal of AGC module (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821634445.5U CN209120141U (en) | 2018-10-09 | 2018-10-09 | A kind of simple LC resonance amplifier installation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821634445.5U CN209120141U (en) | 2018-10-09 | 2018-10-09 | A kind of simple LC resonance amplifier installation |
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| Publication Number | Publication Date |
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| CN209120141U true CN209120141U (en) | 2019-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821634445.5U Active CN209120141U (en) | 2018-10-09 | 2018-10-09 | A kind of simple LC resonance amplifier installation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111682859A (en) * | 2020-07-09 | 2020-09-18 | 西安电子科技大学 | Power amplifier of low-power consumption AB class CMOS |
-
2018
- 2018-10-09 CN CN201821634445.5U patent/CN209120141U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111682859A (en) * | 2020-07-09 | 2020-09-18 | 西安电子科技大学 | Power amplifier of low-power consumption AB class CMOS |
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