CN109672412A - Low-frequency amplifier dynamic range circuit in a kind of control - Google Patents
Low-frequency amplifier dynamic range circuit in a kind of control Download PDFInfo
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- CN109672412A CN109672412A CN201811526150.0A CN201811526150A CN109672412A CN 109672412 A CN109672412 A CN 109672412A CN 201811526150 A CN201811526150 A CN 201811526150A CN 109672412 A CN109672412 A CN 109672412A
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- 238000003199 nucleic acid amplification method Methods 0.000 claims description 19
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/08—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements
- H03F1/12—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements by use of attenuating means
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Amplification And Gain Control (AREA)
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Abstract
Low-frequency amplifier dynamic circuit includes low-noise amplifier, filter, dynamic range control module, amplifier, emitter following circuit in a kind of control provided by the invention；The low-noise amplifier receives input signal and is sequentially connected with filter, dynamic range control module, amplifier, exports signal after reconnecting filter, emitter following circuit.Device simple using structure, small-sized, general, cheap forms dynamic range control module, connection including voltage-controlled attenuator and F555 time base circuit, realize the decaying to high-power signal, increase the dynamic range of gain control circuit, it can make low attenuation state of the attenuator when input signal is weak in Insertion Loss, it is in highly attenuating state when input signal is strong, effectively expands the dynamic range of former amplifying circuit.
Description
Technical field
The present invention relates to low-frequency amplifier dynamic range circuits in a kind of control.
Background technique
The present invention is dynamic range of signals expansion technique, can be realized by design dynamic range control circuit module, warp
It is often used in missile guidance and control technology, amplifying circuit is obtaining ground radar signal and the reflected signal of target
When, because of the difference of the variation of the distance of operating distance, transmission medium, condition of acceptance, cause the signal strength received can be
Fluctuation in very big range just will appear strong and weak very greatly different signal power in the output end of amplifying circuit.For the ease of place
Digital signal is managed, the signal strength of amplification circuit output end should fluctuate in lesser range, while require the dynamic of amplifying circuit
State range is as wide as possible.The integration module of extension dynamic range of signals unprofessional at this stage, is had " greatly by selection
Amplifying device and some auxiliary circuits dynamically " designs to complete the Larger Dynamic of amplifying circuit.Circuit is complex and costly in this way,
And multistage connection amplification is needed when high-gain, dynamic range will be compressed, and be difficult to meet the requirement of Larger Dynamic.
Summary of the invention
In order to solve the above technical problems, the present invention provides low-frequency amplifier dynamic range circuit in a kind of control, the electricity
Road transport is improved the dynamic range of original circuit with F555 time base circuit, and output pulsation is small, and the big signal of dynamic range is conducive to
The reception and processing of receiver.
The present invention is achieved by the following technical programs.
Low-frequency amplifier dynamic circuit includes low-noise amplifier, filter, dynamic in a kind of control provided by the invention
Range control module, amplifier, emitter following circuit；The low-noise amplifier receives input signal and filter, dynamic range control
Molding block, amplifier are sequentially connected, and export signal after reconnecting filter, emitter following circuit.
The low-noise amplifier receives input signal, amplified signal gain.
The filter carries out frequency-selective filtering to input signal, crosses noise filtering, distorted signal.
The dynamic range control module includes detecting circuit, DC amplification circuit, F555 time base circuit, attenuator, institute
Stating attenuator is voltage-controlled type, according to the attenuation of the different adjustment signal of control voltage；The detecting circuit believes exchange
Number be converted to direct current signal, the variation of the direct current signal energy real time reaction input terminal AC signal；The DC amplification circuit
Signal is reversely amplified；The F555 time base circuit includes F555 chip, resistance R1, resistance R2, resistance R3, resistance RL, filter
Wave capacitor C1；The F555 chip includes pin 1, pin 2, pin 3, pin 4, pin 5, pin 6, pin 7, pin 8, pin
1 and resistance R3It is grounded after connection, pin 2 and resistance R2It is connect after connection with pin 1, pin 2 is connect with power input, pin 3
For voltage output end, pin 4 connects power supply VCC1, pin 5 and filter capacitor C1It is grounded after connection, pin 6 and voltage input end connect
It connects, pin 7 and resistance RLIt is connect after connection with power supply VCC2, pin 8 is connect with pin 4, pin 8 and resistance R1After connection with electricity
Press input terminal connection；Dynamic range control circuit is core of the invention part, and the voltage signal after filters filter is divided into
Two, one is directly entered a channel of attenuator, and another enters detecting circuit, by AC-DC conversion at direct current signal
Enter DC amplification circuit afterwards, reversed amplified signal enters F555 time base circuit output control voltage and enters the another of attenuator
One channel, attenuator carry out different degrees of attenuation according to the height of input voltage and adjust.
The amplifier carries out gain amplification to signal.
The emitter following circuit has relatively high loading capacity, carries out gain amplification to signal, guarantees that the gain of output signal reaches
To requirement.
The beneficial effects of the present invention are: device simple using structure, small-sized, general, cheap forms dynamic range control
Molding block, the connection including voltage-controlled attenuator and F555 time base circuit, realizes the decaying to high-power signal, increases gain
The dynamic range of control circuit can make low attenuation state of the attenuator when input signal is weak in Insertion Loss, in input signal
It is in highly attenuating state when strong, effectively expands the dynamic range of former amplifying circuit.
Detailed description of the invention
Fig. 1 is structure principle chart of the invention；
Fig. 2 is the structure principle chart of dynamic range control module；
Fig. 3 is F555 time base circuit input voltage and output voltage relational graph；
Fig. 4 is attenuator attenuation and control voltage curve figure；
Fig. 5 is F555 time base circuit.
Specific embodiment
Be described further below technical solution of the present invention, but claimed range be not limited to it is described.
In a kind of control low-frequency amplifier dynamic circuit include low-noise amplifier, filter, dynamic range control module,
Amplifier, emitter following circuit；The low-noise amplifier receives input signal and filter, dynamic range control module, amplifier
It is sequentially connected, then with filter, emitter following with circuit connection output signal.
The low-noise amplifier receives input signal, amplified signal gain.
The filter carries out frequency-selective filtering to input signal, crosses noise filtering, distorted signal.
The dynamic range control module includes detecting circuit, DC amplification circuit, F555 time base circuit, attenuator, institute
Stating attenuator is voltage-controlled type, according to the attenuation of the different adjustment signal of control voltage；The detecting circuit believes exchange
Number be converted to direct current signal, the variation of the direct current signal energy real time reaction input terminal AC signal；The DC amplification circuit
Signal is reversely amplified；The F555 time base circuit includes F555 chip, resistance R1, resistance R2, resistance R3, resistance RL, filter
Wave capacitor C1；The F555 chip includes pin 1, pin 2, pin 3, pin 4, pin 5, pin 6, pin 7, pin 8, pin
1 and resistance R3It is grounded after connection, pin 2 and resistance R2It is connect after connection with pin 1, pin 2 is connect with power input, pin 3
For voltage output end, pin 4 connects power supply VCC1, pin 5 and filter capacitor C1It is grounded after connection, pin 6 and voltage input end connect
It connects, pin 7 and resistance RLIt is connect after connection with power supply VCC2, pin 8 is connect with pin 4, pin 8 and resistance R1After connection with electricity
Press input terminal connection；Dynamic range control circuit is core of the invention part, and the voltage signal after filters filter is divided into
Two, one is directly entered a channel of attenuator, and another enters detecting circuit, by AC-DC conversion at direct current signal
Enter DC amplification circuit afterwards, reversed amplified signal enters F555 time base circuit output control voltage and enters the another of attenuator
One channel, attenuator carry out different degrees of attenuation according to the height of input voltage and adjust.
The amplifier carries out gain amplification to signal.
The emitter following circuit has relatively high loading capacity, carries out gain amplification to signal, guarantees that the gain of output signal reaches
To requirement.
Working principle: signal carries out gain through low-noise amplifier and is amplified into filter, and filter carries out signal
Frequency-selecting filtering, eliminates that portion waveshape is poor or the noise of distortion, and into dynamic range control module, signal splits into two, and one
Branch is directly entered a channel of attenuator, and one enters in detecting circuit and is converted to direct current by exchange, amplifies using direct current
Circuit is reversely amplified, into the input terminal of F555 chip, if the signal strength into dynamic range control module is weak, and inspection
The voltage of wave device output is low, and by direct current sign-changing amplifier output HIGH voltage, basis is set after high voltage enters F555 time base circuit
The parameter output high level set can be declined with reference to the relationship of Fig. 4 control voltage and attenuation, high level control when parameter selection
Subtract device and export low attenuation, remains unchanged later；If the signal strength into dynamic range control module is strong, wave detector output
Voltage it is high, export low-voltage by direct current sign-changing amplifier, low-voltage enters after F555 time base circuit according to the ginseng set
Number output low-voltage can control attenuator output with reference to the relationship of Fig. 4 control voltage and attenuation, low-voltage when parameter selection
High attenuation remains unchanged later, in summary two kinds of situations, low decaying of the attenuator when input signal is weaker in Insertion Loss
State is in highly attenuating state when input signal is stronger, and decaying improves the dynamic range of circuit later, and output signal enters
Amplifier is further amplified, and is entered back into filter and is carried out frequency-selecting filtering arrangement waveform, finally enters emitter following circuit and driven
Dynamic amplification, finally output are convenient for receiving, fluctuate signal small, that dynamic range is big.
Claims (7)
1. low-frequency amplifier dynamic circuit in a kind of control, including low-noise amplifier, filter, dynamic range control module,
Amplifier, emitter following circuit；It is characterized by: the low-noise amplifier receives input signal and filter, dynamic range control
Module, amplifier are sequentially connected, and export signal after reconnecting filter, emitter following circuit.
2. low-frequency amplifier dynamic circuit in a kind of control as described in claim 1, it is characterised in that: the low noise amplification
Device receives input signal, amplified signal gain.
3. low-frequency amplifier dynamic circuit in a kind of control as described in claim 1, it is characterised in that: the filter is to defeated
Enter signal and carry out frequency-selective filtering, crosses noise filtering, distorted signal.
4. low-frequency amplifier dynamic circuit in a kind of control as described in claim 1, it is characterised in that: the dynamic range control
Molding block includes detecting circuit, DC amplification circuit, F555 time base circuit, attenuator；The detecting circuit and filter export
End connection, then is sequentially connected with DC amplification circuit, time base circuit and connect afterwards with a channel of attenuator, attenuator it is another
A channel is connect with filter；The attenuator is voltage-controlled type, according to the attenuation of the different adjustment signal of control voltage；
AC signal is converted to direct current signal, the change of the direct current signal energy real time reaction input terminal AC signal by the detecting circuit
Change；The DC amplification circuit reversely amplifies signal.
5. dynamic range control module as claimed in claim 4, it is characterised in that: the F555 time base circuit includes F555 core
Piece, resistance R1, resistance R2, resistance R3, resistance RL, filter capacitor C1；The F555 chip include pin 1, pin 2, pin 3,
Pin 4, pin 5, pin 6, pin 7, pin 8, pin 1 are grounded after connecting with resistance R3, pin 2 connect with resistance R2 after with draw
Foot 1 connects, and pin 2 is connect with power input, and pin 3 is voltage output end, and pin 4 connects power supply VCC1, pin 5 and filtering
It is grounded after capacitor C1 connection, pin 6 is connect with voltage input end, and pin 7 is connect after connecting with resistance RL with power supply VCC2, pin
8 connect with pin 4, and pin 8 is connect after connecting with resistance R1 with voltage input end.
6. low-frequency amplifier dynamic circuit in a kind of control as described in claim 1, it is characterised in that: the amplifier is to letter
Number carry out gain amplification.
7. low-frequency amplifier dynamic circuit in a kind of control as described in claim 1, it is characterised in that: the emitter following circuit tool
There is relatively high loading capacity, gain amplification is carried out to signal, guarantees that the gain of output signal reaches requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811526150.0A CN109672412A (en) | 2018-12-13 | 2018-12-13 | Low-frequency amplifier dynamic range circuit in a kind of control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811526150.0A CN109672412A (en) | 2018-12-13 | 2018-12-13 | Low-frequency amplifier dynamic range circuit in a kind of control |
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| Publication Number | Publication Date |
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| CN109672412A true CN109672412A (en) | 2019-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811526150.0A Pending CN109672412A (en) | 2018-12-13 | 2018-12-13 | Low-frequency amplifier dynamic range circuit in a kind of control |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000216650A (en) * | 1999-01-20 | 2000-08-04 | Mitsubishi Electric Corp | Microwave low distortion amplifier |
| JP2011205362A (en) * | 2010-03-25 | 2011-10-13 | Mitsubishi Electric Corp | High frequency amplifier circuit |
| CN203522662U (en) * | 2013-10-18 | 2014-04-02 | 常州国光数据通信有限公司 | Mixed-control device for gain of short-wave receiver |
| CN104767527A (en) * | 2015-04-22 | 2015-07-08 | 上海创远仪器技术股份有限公司 | Circuit capable of enlarging dynamic range of analog-digital conversion |
| CN206060732U (en) * | 2016-10-12 | 2017-03-29 | 武汉大学 | A kind of wide dynamic range AFE (analog front end) |
| JP2017208635A (en) * | 2016-05-17 | 2017-11-24 | 新日本無線株式会社 | Low Noise Amplifier |
| CN108111177A (en) * | 2017-12-15 | 2018-06-01 | 深圳市虹远通信有限责任公司 | The auto gain control method and device of a kind of super big dynamic range |
-
2018
- 2018-12-13 CN CN201811526150.0A patent/CN109672412A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000216650A (en) * | 1999-01-20 | 2000-08-04 | Mitsubishi Electric Corp | Microwave low distortion amplifier |
| JP2011205362A (en) * | 2010-03-25 | 2011-10-13 | Mitsubishi Electric Corp | High frequency amplifier circuit |
| CN203522662U (en) * | 2013-10-18 | 2014-04-02 | 常州国光数据通信有限公司 | Mixed-control device for gain of short-wave receiver |
| CN104767527A (en) * | 2015-04-22 | 2015-07-08 | 上海创远仪器技术股份有限公司 | Circuit capable of enlarging dynamic range of analog-digital conversion |
| JP2017208635A (en) * | 2016-05-17 | 2017-11-24 | 新日本無線株式会社 | Low Noise Amplifier |
| CN206060732U (en) * | 2016-10-12 | 2017-03-29 | 武汉大学 | A kind of wide dynamic range AFE (analog front end) |
| CN108111177A (en) * | 2017-12-15 | 2018-06-01 | 深圳市虹远通信有限责任公司 | The auto gain control method and device of a kind of super big dynamic range |
Non-Patent Citations (1)
| Title |
|---|
| 柳良，陈泾浦: ""数字自动增益控制和模数转换数值抖动研究"", 《现代电子技术》 * |
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Application publication date: 20190423 |
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| RJ01 | Rejection of invention patent application after publication |