CN107863940A - A kind of Larger Dynamic scope ALC protection circuits with temperature compensation function - Google Patents
A kind of Larger Dynamic scope ALC protection circuits with temperature compensation function Download PDFInfo
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- CN107863940A CN107863940A CN201711167707.1A CN201711167707A CN107863940A CN 107863940 A CN107863940 A CN 107863940A CN 201711167707 A CN201711167707 A CN 201711167707A CN 107863940 A CN107863940 A CN 107863940A
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Classifications
-
- 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
- H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
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Abstract
A kind of Larger Dynamic scope ALC protection circuits with temperature compensation function; including variable gain amplifier, ALC wave detectors and integral control circuit; the circuit realiration input radio frequency Power Dynamic Range is more than 100dB; product power output gain fluctuation under high and low temperature state is less than 0.5dB; completely propose Circuit theory design method; carry out emulating and surveying checking, whole circuit uses and is designed, produced using multi-chip module (MCM).Circuit meets miniaturization, lightweight, and the requirement such as mass production, has broad application prospects.
Description
Technical field
The present invention relates to a kind of Larger Dynamic scope ALC protection circuits with temperature compensation function, belong to technical field of microwave circuits.
Background technology
Loop automatic gain controls (ALC) circuit to be widely used in radar/communication control processor as active microwave circuits, consolidate
State amplifier, LCAMP etc. have product-derived, and the circuit is operated in radio-frequency front-end, can make system export signal intensity not with
The size of incoming signal level and change, so as to maintain system output signal stabilization of level.
At present, the alc circuit that most of product uses does not consider influence of the high and low temperature environment to circuit, and is difficult to have suddenly
High and steep intermediate zone, influence dynamic regulation scope and the response time of system.
The content of the invention
The technology of the present invention solves problem：A kind of Larger Dynamic scope ALC protection circuits with temperature compensation function are proposed, are solved
Traditional ALC protection circuits input signal control range of having determined is narrow, and the problems such as big is fluctuated in the case of power output high/low temperature.
The present invention technical solution be：
A kind of Larger Dynamic scope ALC protection circuits with temperature compensation function, including variable gain amplifier, ALC wave detectors and
Integral control circuit；Wherein, variable gain amplifier includes first order amplifier, three-level controllable attenuator, second level amplifier
With third level amplifier；
Radio-frequency input signals carries out signal attenuation after the amplification of first order amplifier, then by three-level controllable attenuator,
Then second level amplifier and the amplification of third level amplifier are passed sequentially through again, and the radiofrequency signal of third level amplifier output is
The output radiofrequency signal of ALC protection circuits, the output radiofrequency signal are also connected into ALC wave detectors simultaneously, by the output radio frequency letter
Number carry out detection, export rectified signal Vdet and variable-gain amplifier gain entered to integral control circuit, integral control circuit
Row controls and carries out temperature-compensating to ALC protection circuits.
Integral control circuit by the rectified signal Vdet compared with the reference voltage Vref of outside input, control by output
The attenuation of voltage Vctrl controls three-level controllable attenuator processed, so as to realize the gain control to variable gain amplifier.
The integral control circuit is Second Order Integral circuit.
The integral control circuit includes：Resistance R2, thermistor RT1 and divider resistance R4, R5 composition potential-divider network, electricity
Hinder R3, C3 composition low pass filter, operational amplifier OP1 and the feedback network of electric capacity C1, C2 and resistance R1 compositions；
Rectified signal Vdet enters amplifier OP1 input negative terminal by resistance R2, and reference voltage Vref passes through thermistor
The potential-divider network of RT1 and resistance R4, R5 composition, then the low pass filter formed by R3, C3, into amplifier OP1 input just
Output signal Vc and amplifier OP1 that the feedback network of end, electric capacity C1, C2 and resistance R1 compositions is connected to amplifier OP1 input are born
Between end.
Thermistor RT1 forms the specific annexation of potential-divider network with divider resistance R4, R5：Resistance R5 and thermistor
RT1 is connected in parallel, and resistance R5 one end connection rectified signal Vdet, the other end is grounded by resistance R4.
Electric capacity C1, C2 and resistance R1 composition feedback network annexation be specially：OP1 input negative terminal passes through electric capacity C2
OP1 output end is connected, electric capacity C1 and resistance R1 are in parallel with electric capacity C2 again after being cascaded.
R2=R3, C2=C3 >=C1, R1 × C1≤1.
The transmission function A of the complex frequency domain of the integral control circuit(s)For：
Wherein s=j ω,ω represents frequency.
The input power dynamic range of the ALC protection circuits is more than 100dB.
Compared with the prior art, the invention has the advantages that：
(1) ALC protection circuits proposed by the present invention have the advantages such as miniaturization, lightweight compared with traditional circuit, simultaneously
Circuit form is simple, easily realizes, and provide complete Analysis of Electric Circuit Theory direction.It is applicable mass production demand.
(2) ALC protection circuits of the present invention, casacade multi-amplifier and voltage-controlled attenuator is introduced, realizes input power dynamic range
More than 100dB, while Second Order Integral temperature compensation control circuit is introduced, compared with traditional circuit, add the stability of circuit, exported
Power fluctuates one times of reduction in the case of high/low temperature.Whole circuit is realized product miniaturization using multi-chip module (MCM) and criticized
Quantify production.
Brief description of the drawings
Fig. 1 is the structured flowchart of alc circuit of the present invention；
Fig. 2 is integral control circuit schematic diagram；
Fig. 3 (a) is band temperature compensation functional circuit actual test result；
Fig. 3 (b) is without temperature compensation functional circuit actual test result.
Embodiment
The specific embodiment of the invention is further illustrated below in conjunction with the accompanying drawings.
The specific embodiment of the invention is further illustrated below in conjunction with the accompanying drawings.
The present invention proposes a kind of highly integrated Larger Dynamic scope ALC protection circuits with temperature compensation function, adds temperature compensation work(
Can, ensure that product output gain fluctuation under high and low temperature state meets to require.Whole circuit is carried out using multi-chip module (MCM)
Design, production, circuit meet miniaturization, lightweight, and the requirement such as mass production, had broad application prospects.
In order to realize that input power dynamic range is more than 100dB, variable gain amplifier (VGA) introduce casacade multi-amplifier with
Voltage-controlled attenuator, physical circuit are as shown in Figure 1.
The function of alc circuit is to realize to control Dynamic Range, is the control system of a close loop negative feedback.ALC
Circuit includes variable gain amplifier, ALC wave detectors and integral control circuit；Wherein, variable gain amplifier includes the first order
Amplifier, three-level controllable attenuator, second level amplifier and third level amplifier.
Radio-frequency input signals carries out signal attenuation after the amplification of first order amplifier, then by three-level controllable attenuator,
Then second level amplifier and the amplification of third level amplifier are passed sequentially through again, and the radiofrequency signal of third level amplifier output is
The output radiofrequency signal of ALC protection circuits, the output radiofrequency signal are also connected into ALC wave detectors simultaneously, by the output radio frequency letter
Number carry out detection, export rectified signal Vdet and variable-gain amplifier gain entered to integral control circuit, integral control circuit
Row controls and carries out temperature-compensating to ALC protection circuits.
Second Order Integral control circuit by the rectified signal Vdet compared with the reference voltage Vref of outside input, it is defeated
Go out the attenuation of control voltage Vctrl control three-level controllable attenuators, so as to realize the gain control to variable gain amplifier.
For the consideration of noise, first order amplifier mainly stresses low-noise factor, and second level amplifier is taking into account noise
It is also required for higher gain while coefficient, afterbody amplifier then needs to consider height output 1dB compression points, and compared with
Good output standing wave.
As shown in Fig. 2 integral control circuit is the core of alc circuit, the present invention proposes to utilize Second Order Integral circuit, resistance
R2, thermistor RT1 and divider resistance R4, R5 composition potential-divider network, resistance R3, C3 composition low pass filter, operational amplifier
OP1 and electric capacity C1, C2 and resistance R1 composition feedback network；
Rectified signal Vdet enters amplifier OP1 input negative terminal by resistance R2, and reference voltage Vref passes through thermistor
The potential-divider network of RT1 and resistance R4, R5 composition, then the low pass filter formed by R3, C3, into amplifier OP1 input just
Output signal Vc and amplifier OP1 that the feedback network of end, electric capacity C1, C2 and resistance R1 compositions is connected to amplifier OP1 input are born
Between end.
Thermistor RT1 forms the specific annexation of potential-divider network with divider resistance R4, R5：Resistance R5 and thermistor
RT1 is connected in parallel, and resistance R5 one end connection rectified signal Vdet, the other end is grounded by resistance R4.OP1 input negative terminal
By electric capacity C2 connections OP1 output end, electric capacity C1 and resistance R1 are in parallel with electric capacity C2 again after being cascaded
The transmission function of its complex frequency domain is：
By simplifying integrating circuit model, if R2=R3, C2=C3 >=C1, R1 × C1≤1.Meanwhile consider that loop is established
Time requirement, bring loop gain (LoopGain) into formula and calculate, then can obtain circuit parameter, s=j ω,ω generations
Table frequency.
Increase temperature compensation function on the basis of improved integrating circuit above, in the case of high/low temperature, detecting circuit is with temperature
Change greatly, traditional circuit reference voltage Vref is fixed value, it is impossible to correspond to the change of reference voltage under simulation high/low temperature very well.
Therefore, reference voltage end is changed to the voltage dividing resistance circuit with thermistor, can be fitted by the circuit defeated under different temperatures
Go out reference voltage level corresponding to power so that power output fluctuates reduction in the case of high/low temperature.
In order to reduce volume, realize that the highly integrated whole circuit of circuit is designed, sealed using multi-chip module (MCM)
Dress, and the passage with external electrical interconnections is provided.
Fig. 3 (a), 3 (b) understand that no temperature compensation alc circuit puts output of products power under high/low temperature (+70 DEG C~-35 DEG C) admittedly
Power swing is less than 1dB, minimum output power 42.5dBm.And temperature compensation alc circuit is used, admittedly output of products power is put in height
Power swing is less than 0.5dB, minimum output power 42.9dBm under low temperature.By using temperature compensation ALC protection circuits, obtain
Excellent electrical property.
The content not being described in detail in description of the invention belongs to the known technology of those skilled in the art.
Claims (9)
- A kind of 1. Larger Dynamic scope ALC protection circuits with temperature compensation function, it is characterised in that：Including variable gain amplifier, ALC Wave detector and integral control circuit；Wherein, variable gain amplifier includes first order amplifier, three-level controllable attenuator, second Level amplifier and third level amplifier；Radio-frequency input signals carries out signal attenuation after the amplification of first order amplifier, then by three-level controllable attenuator, then Second level amplifier and the amplification of third level amplifier are passed sequentially through again, and the radiofrequency signal of third level amplifier output is that ALC is protected The output radiofrequency signal of protection circuit, the output radiofrequency signal are also connected into ALC wave detectors simultaneously, and the output radiofrequency signal is carried out Detection, export rectified signal Vdet and variable-gain amplifier gain is controlled to integral control circuit, integral control circuit And temperature-compensating is carried out to ALC protection circuits.
- A kind of 2. Larger Dynamic scope ALC protection circuits with temperature compensation function according to claim 1, it is characterised in that：Product Sub-control circuit by the rectified signal Vdet compared with the reference voltage Vref of outside input, output control voltage Vctrl controls the attenuation of three-level controllable attenuator, so as to realize the gain control to variable gain amplifier.
- A kind of 3. Larger Dynamic scope ALC protection circuits with temperature compensation function according to claim 1 or 2, it is characterised in that： The integral control circuit is Second Order Integral circuit.
- A kind of 4. Larger Dynamic scope ALC protection circuits with temperature compensation function according to claim 1 or 2, it is characterised in that： The integral control circuit includes：Resistance R2, thermistor RT1 and divider resistance R4, R5 composition potential-divider network, resistance R3, C3 Form low pass filter, operational amplifier OP1 and the feedback network of electric capacity C1, C2 and resistance R1 compositions；Rectified signal Vdet by resistance R2 enter amplifier OP1 input negative terminal, reference voltage Vref by thermistor RT1 with The potential-divider network of resistance R4, R5 composition, then the low pass filter formed by R3, C3, into amplifier OP1 input positive terminal, electricity Hold C1, C2 and resistance R1 composition feedback network be connected to amplifier OP1 output signal Vc and amplifier OP1 input negative terminal it Between.
- A kind of 5. Larger Dynamic scope ALC protection circuits with temperature compensation function according to claim 4, it is characterised in that：Heat Quick resistance RT1 forms the specific annexation of potential-divider network with divider resistance R4, R5：Resistance R5 is connected in parallel on thermistor RT1 Together, resistance R5 one end connection rectified signal Vdet, the other end are grounded by resistance R4.
- A kind of 6. Larger Dynamic scope ALC protection circuits with temperature compensation function according to claim 4, it is characterised in that：Electricity Holding the feedback network annexation that C1, C2 and resistance R1 are formed is specially：OP1 input negative terminal passes through electric capacity C2 connections OP1's Output end, electric capacity C1 and resistance R1 are in parallel with electric capacity C2 again after being cascaded.
- A kind of 7. Larger Dynamic scope ALC protection circuits with temperature compensation function according to claim 4, it is characterised in that：R2 =R3, C2=C3 >=C1, R1 × C1≤1.
- A kind of 8. Larger Dynamic scope ALC protection circuits with temperature compensation function according to claim 4, it is characterised in that：Institute State the transmission function A of the complex frequency domain of integral control circuit(s)For：<mrow> <msub> <mi>A</mi> <mrow> <mo>(</mo> <mi>S</mi> <mo>)</mo> </mrow> </msub> <mo>=</mo> <mrow> <mo>(</mo> <mn>1</mn> <mo>+</mo> <mfrac> <mrow> <msub> <mi>R</mi> <mn>1</mn> </msub> <msub> <mi>C</mi> <mn>1</mn> </msub> <mi>S</mi> <mo>+</mo> <mn>1</mn> </mrow> <mrow> <msub> <mi>R</mi> <mn>1</mn> </msub> <msub> <mi>R</mi> <mn>2</mn> </msub> <msub> <mi>C</mi> <mn>1</mn> </msub> <msub> <mi>C</mi> <mn>2</mn> </msub> <msup> <mi>S</mi> <mn>2</mn> </msup> <mo>+</mo> <msub> <mi>R</mi> <mn>2</mn> </msub> <mrow> <mo>(</mo> <msub> <mi>C</mi> <mn>1</mn> </msub> <mo>+</mo> <msub> <mi>C</mi> <mn>2</mn> </msub> <mo>)</mo> </mrow> <mi>S</mi> </mrow> </mfrac> <mo>)</mo> </mrow> <mfrac> <mn>1</mn> <mrow> <msubsup> <mi>C</mi> <mn>3</mn> <mn>2</mn> </msubsup> <msub> <mi>R</mi> <mn>2</mn> </msub> <msup> <mi>S</mi> <mn>2</mn> </msup> <mo>+</mo> <msub> <mi>C</mi> <mn>3</mn> </msub> <mi>S</mi> </mrow> </mfrac> <msub> <mi>V</mi> <mrow> <mi>r</mi> <mi>e</mi> <mi>f</mi> </mrow> </msub> <mo>-</mo> <mfrac> <mrow> <msub> <mi>R</mi> <mn>1</mn> </msub> <msub> <mi>C</mi> <mn>1</mn> </msub> <mi>S</mi> <mo>+</mo> <mn>1</mn> </mrow> <mrow> <msub> <mi>R</mi> <mn>1</mn> </msub> <msub> <mi>R</mi> <mn>2</mn> </msub> <msub> <mi>C</mi> <mn>1</mn> </msub> <msub> <mi>C</mi> <mn>2</mn> </msub> <msup> <mi>S</mi> <mn>2</mn> </msup> <mo>+</mo> <msub> <mi>R</mi> <mn>2</mn> </msub> <mrow> <mo>(</mo> <msub> <mi>C</mi> <mn>1</mn> </msub> <mo>+</mo> <msub> <mi>C</mi> <mn>2</mn> </msub> <mo>)</mo> </mrow> <mi>S</mi> </mrow> </mfrac> <msub> <mi>V</mi> <mi>det</mi> </msub> <mo>,</mo> </mrow>Wherein s=j ω,ω represents frequency.
- A kind of 9. Larger Dynamic scope ALC protection circuits with temperature compensation function according to claim 4, it is characterised in that：Should The input power dynamic range of ALC protection circuits is more than 100dB.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711167707.1A CN107863940B (en) | 2017-11-21 | 2017-11-21 | Large-dynamic-range ALC (automatic level control) protection circuit with temperature compensation function |
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| CN201711167707.1A CN107863940B (en) | 2017-11-21 | 2017-11-21 | Large-dynamic-range ALC (automatic level control) protection circuit with temperature compensation function |
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| CN107863940B CN107863940B (en) | 2021-06-11 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108923757A (en) * | 2018-07-02 | 2018-11-30 | 成都九洲电子信息系统股份有限公司 | The detection of radio frequency power output closed loop and regulating device |
| CN109743029A (en) * | 2018-12-19 | 2019-05-10 | 安徽华东光电技术研究所有限公司 | Predistortion circuit based on gallium nitride power booster output nonlinear gain |
| CN110224679A (en) * | 2019-05-27 | 2019-09-10 | 山东航天电子技术研究所 | A kind of automatic gain control circuit with temperature-compensating |
| CN110543205A (en) * | 2019-08-07 | 2019-12-06 | 中电科仪器仪表有限公司 | method for improving dynamic range of vector network analyzer source under wide temperature condition |
| CN112187201A (en) * | 2020-10-22 | 2021-01-05 | 上海航天电子通讯设备研究所 | Temperature compensation gain closed-loop circuit of satellite-borne gallium nitride solid-state power amplifier |
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| CN103209016A (en) * | 2012-01-17 | 2013-07-17 | 深圳国人通信有限公司 | Repeater and power amplifier thereof |
| CN107196617A (en) * | 2017-05-27 | 2017-09-22 | 中国电子科技集团公司第四十研究所 | Intelligent power fixed ampllitude loop and fixed ampllitude method based on dynamic self-adapting algorithm |
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| US20070290760A1 (en) * | 2006-06-20 | 2007-12-20 | Stmicroelectronics, Inc. | Method and system for generating a temperature-compensated control signal |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108923757A (en) * | 2018-07-02 | 2018-11-30 | 成都九洲电子信息系统股份有限公司 | The detection of radio frequency power output closed loop and regulating device |
| CN109743029A (en) * | 2018-12-19 | 2019-05-10 | 安徽华东光电技术研究所有限公司 | Predistortion circuit based on gallium nitride power booster output nonlinear gain |
| CN110224679A (en) * | 2019-05-27 | 2019-09-10 | 山东航天电子技术研究所 | A kind of automatic gain control circuit with temperature-compensating |
| CN110543205A (en) * | 2019-08-07 | 2019-12-06 | 中电科仪器仪表有限公司 | method for improving dynamic range of vector network analyzer source under wide temperature condition |
| CN112187201A (en) * | 2020-10-22 | 2021-01-05 | 上海航天电子通讯设备研究所 | Temperature compensation gain closed-loop circuit of satellite-borne gallium nitride solid-state power amplifier |
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| CN107863940B (en) | 2021-06-11 |
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