CN115037256A - Dynamic feedback ultrahigh-amplitude phase-stable amplifying circuit and working method thereof - Google Patents
Dynamic feedback ultrahigh-amplitude phase-stable amplifying circuit and working method thereof Download PDFInfo
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Abstract
The invention discloses a dynamic feedback ultrahigh-amplitude phase-stable amplifying circuit and a working method thereof, wherein the circuit is a double-dynamic control loop formed on the basis of a dynamic threshold and dynamic feedback, and the circuit specifically comprises the following steps: the input signal is adopted for coupling detection, then the signal is coupled and detected through a voltage-controlled attenuation unit, an amplification unit and an output signal, and direct current signals output by two paths of coupling detection respectively enter corresponding operational amplifiers; the temperature change value is collected through the temperature sensing unit, the change quantity is matched through the subtraction slope, then the change quantity is respectively synthesized with the two operational amplification units of the coupling detection through the difference synthesis unit to be used as the dynamic change quantity, the dynamic change quantity is respectively input into the comparison unit for processing through the dynamic threshold and the dynamic feedback, and the generated signal controls the voltage-controlled attenuation unit. The invention has the advantages of double control loops, capability of controlling loop dynamic regulation threshold, dynamic feedback control and the like, and has the advantages of simple circuit topology, small circuit size, low cost and wide application prospect.
Description
Technical Field
The invention relates to the technical field of electronic systems, in particular to a dynamic feedback ultrahigh amplitude phase stable amplifying circuit and a working method thereof.
Background
At present, for a power amplifier, an ALC circuit is mostly adopted to ensure the stability of output power. The output power fluctuates with the coupler and the detector in the ALC circuit due to large changes at different temperatures, and the fluctuation can exceed +/-0.5 dB under the general condition. In order to improve the output stability of the power amplifier, a method of compensating a reference threshold by adding a thermistor is generally used, the method needs to select a thermistor value matched with the power amplifier, continuously debug and correct, and the problem that the phase error of the power amplifier is large under different output powers is difficult to avoid due to the adoption of deep ALC state operation.
The power amplifier with high power output generally performs power compensation through a temperature compensation attenuator, or outputs a stable voltage to provide a relatively stable gate voltage for the gate of the power amplifier tube by adopting a combination of a DAC and an operational amplifier, so that the power amplifier output is stable. After the temperature compensation and grid voltage compensation circuit is adopted, the long-term stability of the power amplifier is tested in a power fluctuation range of about +/-0.5 dB, and the power stability at high and low temperatures is about 1 dB. Due to the adoption of fixed analog temperature compensation, the voltage stability has fluctuation of about 0.02V caused by the internal DA precision. For a specific high-demand power stability system, the system requirements cannot be met, and the above compensation circuit presents a bottleneck.
Disclosure of Invention
The invention aims to provide a dynamic feedback ultrahigh amplitude phase stable amplifying circuit, so that ultrahigh stability of the amplitude and the phase of an output signal is kept under temperature change, and ultrahigh stability of the output power and the phase is synchronously kept when the power of an input signal is changed in a large range.
The technical solution for realizing the purpose of the invention is as follows: a dynamic feedback ultrahigh amplitude phase stable amplifying circuit is a double dynamic control loop formed by a dynamic threshold and dynamic feedback, and comprises the following specific steps: the input signal is adopted for coupling detection, then the signal is coupled and detected through a voltage-controlled attenuation unit, an amplification unit and an output signal, and direct current signals output by two paths of coupling detection respectively enter corresponding operational amplifiers; the temperature change value is collected through the temperature sensing unit, the change quantity is matched through the subtraction slope, then the change quantity is respectively synthesized with the two operational amplification units of the coupling detection through the difference synthesis unit to be used as the dynamic change quantity, the dynamic change quantity is respectively input into the comparison unit for processing through the dynamic threshold and the dynamic feedback, and the generated signal controls the voltage-controlled attenuation unit.
A working method of a dynamic feedback ultrahigh amplitude phase stable amplifying circuit comprises the following steps:
step S01, according to the frequency range of the required working signal, selecting the frequency range of the first coupling unit, the second coupling unit, the voltage-controlled attenuation unit, the amplification unit, the first detection unit and the second detection unit which actually apply the working frequency band;
step S02, according to the selected sampling signal types of the first detector unit, the second detector unit and the temperature sensor unit: the first detection unit and the second detection unit increase or decrease the output signals along with the increase of the input power, and the temperature sensing unit increases or decreases the output voltage along with the increase of the temperature;
step S03, analyzing the detector unit with increased power and the temperature sensor unit with increased temperature, and performing the same-direction change after the device with the detector unit whose output voltage decreases due to the increase of input power is subtracted, and if the temperature sensor unit changes, the device also decreases with the increase of temperature;
step S04, matching and canceling the detection voltage changes which are changed due to the temperature changes and correspond to the first detection unit and the second detection unit after the collected voltage corresponding to the temperature sensing unit passes through the subtraction slope matching unit;
step S05, according to the maximum value of the required output signal, adjusting the coupling value of the output signal to the maximum value which satisfies the maximum linear detection range of the second detection unit, and using the coupling value as the signal V2 which is the maximum reference signal output by the second detection unit; the signal V2 and the voltage signal output by the difference synthesis unit are subjected to summation operation and then enter a comparison unit as a dynamic feedback signal V4;
step S06, synchronously adjusting the coupling value of the first coupling unit to the maximum value satisfying the maximum linear detection range of the first detection unit, taking the coupling value as the output signal V1 of the first detection unit, and adding the signal V1 and the voltage signal output by the difference synthesis unit as the dynamic threshold signal V3 to enter a comparison unit;
step S07, the control signal V5 outputted by the comparison unit between the dynamic threshold signal V3 and the dynamic feedback signal V4 is used to control the voltage-controlled attenuation unit;
step S08, the control signal output by the comparison unit meets the maximum amplitude change value under the condition of unchanged phase when the voltage-controlled attenuation unit controls, and the maximum amplitude change value is used as a signal V5;
step S09, when the input signal decreases synchronously, the dynamic feedback signal V4 decreases simultaneously due to the synchronous decrease of the dynamic threshold signal V3, so that the control signal V5 output by the comparing unit remains unchanged dynamically, the output power is controllable and stable, and the phase from the input signal to the output signal also remains unchanged;
in step S10, when the input signal is kept unchanged and the gain of the link between the input and output signals is changed due to the temperature change, the output signal V1 of the first detection unit is unchanged at this time, the corresponding dynamic threshold signal V3 is also kept unchanged, the output signal V2 of the second detection unit is changed V2 ± Δ V2, the dynamic feedback signal V4 is correspondingly changed, and the dynamic threshold signal V3 is compared with the dynamic feedback signal V3583 to be unchanged, so the control signal V5 is changed accordingly, thereby controlling the voltage-controlled attenuation unit to follow the change, so that the amplitude of the final output signal is kept stable, and the phase information of the link is also kept unchanged synchronously.
Compared with the prior art, the invention has the following remarkable advantages: (1) by adopting a dynamic feedback loop design and adopting the stability of the temperature compensation correction coupler and the detector at different temperatures, the closed-loop compression depth is dynamically adjusted and ensured, the stability of the output power of the power amplifier is within 0.05dB (-40 ℃ to +60 ℃), the power stability precision is improved by about 10 times, the phase stability is kept less than 1 ℃ after the output power changes along with the input power, and the application of high output stability is effectively ensured; (2) due to temperature change, the amplitude of the radio frequency power signal can still be stable, and the variation is less than 0.05 dB; due to temperature change, the phase change of the output radio frequency signal is less than 1 degree; (3) when the input signal synchronously increases or decreases, the output signal synchronously increases or decreases, but the output power still keeps stable, and the phase also keeps high stability; the electrical property batch consistency among circuits is good; wide temperature application range, small workload and low cost.
Drawings
Fig. 1 is a system circuit block diagram of the ultra-high amplitude phase-stable amplifying circuit of the dynamic feedback of the present invention.
Fig. 2 is a signal control flow diagram of the dynamic feedback ultrahigh amplitude phase stable amplifying circuit of the present invention.
Detailed Description
With reference to fig. 1, the present invention provides a dynamic feedback ultrahigh amplitude phase stable amplifying circuit, which is a dual dynamic control loop formed based on a dynamic threshold and dynamic feedback, and specifically comprises: the input signal is adopted for coupling detection, then the signal is coupled and detected through a voltage-controlled attenuation unit, an amplification unit and an output signal, and direct current signals output by two paths of coupling detection respectively enter corresponding operational amplifiers; the temperature change value is collected through the temperature sensing unit, the change quantity is matched through the subtraction slope, then the change quantity is respectively synthesized with the two operational amplification units of the coupling detection through the difference synthesis unit to be used as the dynamic change quantity, the dynamic change quantity is respectively input into the comparison unit for processing through the dynamic threshold and the dynamic feedback, and the generated signal controls the voltage-controlled attenuation unit.
The device comprises a first coupling unit 1, a voltage-controlled attenuation unit 2, an amplification unit 3, a second coupling unit 4, a first detection unit 5, a comparison unit 6, a second detection unit 7, a first operational amplification unit 8, a difference synthesis unit 9, a second operational amplification unit 10, a subtraction slope matching unit 11 and a temperature sensing unit 12;
the first coupling unit 1, the voltage-controlled attenuation unit 2, the amplifying unit 3 and the second coupling unit 4 are sequentially connected between signal input and signal output;
the first coupling unit 1 is connected to one input end of a first operational amplification unit 8 through a first detection unit 5, and the second coupling unit 4 is connected to one input end of a second operational amplification unit 10 through a second detection unit 7;
the temperature sensing unit 12 is sequentially connected with the subtraction slope matching unit 11 and the difference synthesizing unit 9, one output end of the difference synthesizing unit 9 is connected with the other input end of the first operational amplifying unit 8, and the other output end of the difference synthesizing unit 9 is connected with the other input end of the second operational amplifying unit 10;
the output end of the first operational amplification unit 8 is connected to one input end of the comparison unit 6, the output end of the second operational amplification unit 10 is connected to the other input end of the comparison unit 6, and the output end of the comparison unit 6 is connected to the voltage-controlled attenuation unit 2.
As a specific implementation mode, the dual dynamic control loops adopt a dynamic threshold mode in the first loop and a dynamic feedback mode in the second loop, and the two loops work independently or simultaneously in a combined mode.
In a specific embodiment, the first operational amplifier unit 8 outputs a dynamic threshold, the second operational amplifier unit 10 outputs a dynamic feedback signal, the dynamic threshold and the dynamic feedback signal are simultaneously compared in the comparison unit 6, and the comparison output signal is provided to the voltage-controlled attenuation unit 2 to form a feedback loop.
In one embodiment, the first and second detector units 5 and 7 are of the same type.
As a specific implementation mode, the circuit is divided into two working states of constant-power constant-phase output under temperature change and constant-phase output under wide-range change of power output under temperature change.
In one embodiment, the collected voltage of the temperature sensing unit 12 passes through the subtraction slope matching unit 11, and then the detected voltage changes caused by the temperature changes of the first detecting unit 5 and the second detecting unit 7 are matched and canceled.
In one embodiment, the coupling value of the second coupling unit 4 is adjusted according to the maximum value of the required output signal, the maximum value satisfying the maximum linear detection range of the second detection unit 7 is used as the output signal V2 of the second detection unit 7, and the signal V2 is summed with the voltage signal passing through the difference synthesis unit 9 and then enters the comparison unit 6 as the dynamic feedback signal V4.
In one embodiment, the coupling value of the first coupling unit 1 is adjusted to satisfy the maximum value of the maximum linear detection range of the first detection unit 5, and the signal V1 is summed with the voltage signal of the difference synthesis unit 9 as the output signal V1 of the first detection unit 5 and then enters the comparison unit 6 as the dynamic threshold signal V3.
With reference to fig. 2, the working method of the dynamic feedback ultrahigh amplitude phase stable amplifying circuit of the present invention includes the following steps:
step S01, according to the frequency range of the required working signal, selecting the frequency range of the first coupling unit 1, the second coupling unit 4, the voltage-controlled attenuation unit 2, the amplification unit 3, the first detection unit 5 and the second detection unit 7 which actually apply the working frequency band;
step S02, based on the selected sampling signal types of the first detector unit 5, the second detector unit 7, and the temperature sensor unit 12, determines: the output signals of the first detection unit 5 and the second detection unit 7 increase or decrease with the increase of the input power, and the output voltage of the temperature sensing unit 12 increases or decreases with the increase of the temperature;
step S03, analyzing the detecting unit with increased power and the temperature sensing unit 12 with increased temperature, and performing the same-direction change after the subtracting method is adopted for the device with the detecting unit with decreased output voltage due to increased input power, and performing the same processing if the temperature sensing unit changes and decreases with the temperature increase;
step S04, matching and canceling the detection voltage changes of the first detection unit 5 and the second detection unit 7 corresponding to the temperature changes after the collected voltage corresponding to the temperature sensing unit 12 passes through the subtraction slope matching unit 11;
step S05, adjusting the output signal coupling value to the maximum value satisfying the maximum linear detection range of the second detector 7 according to the maximum value of the required output signal, as the signal V2 which is the maximum reference signal output from the second detector 7; the signal V2 and the voltage signal output by the difference synthesis unit 9 are subjected to summation operation and then enter the comparison unit 6 as a dynamic feedback signal V4;
step S06, synchronously adjusting the coupling value of the first coupling unit 1 to the maximum value satisfying the maximum linear detection range of the first detection unit 5, and taking the coupling value as the output signal V1 of the first detection unit 5, and the signal V1 and the voltage signal output by the difference synthesis unit 9 are summed and then enter the comparison unit 6 as the dynamic threshold signal V3;
in step S07, the control signal V5 outputted by the comparison unit 6 from the dynamic threshold signal V3 and the dynamic feedback signal V4 is used to control the voltage-controlled attenuation unit 2;
step S08, the control signal output by the comparing unit 6 satisfies the maximum amplitude change value under the condition of the unchanged phase when the voltage controlled attenuation unit 2 controls as the signal V5;
step S09, when the input signal decreases synchronously, the dynamic feedback signal V4 decreases simultaneously due to the synchronous decrease of the dynamic threshold signal V3, so that the control signal V5 output by the comparing unit 6 remains unchanged dynamically, the output power is controllable and stable, and the phase from the input signal to the output signal also remains unchanged;
step S10, when the input signal is kept unchanged and the gain of the link between the input and output signals is changed due to the temperature change, the output signal V1 of the first detecting unit 5 is kept unchanged at this time, the corresponding dynamic threshold signal V3 is also kept unchanged, the output signal V2 of the second detecting unit 7 generates a change V2 ± Δ V2, and accordingly the dynamic feedback signal V4 is also changed correspondingly, and compared with the dynamic threshold signal V3, the dynamic feedback signal V3 is not changed, and therefore the control signal V5 is changed accordingly, so as to control the voltage-controlled attenuation unit 2 to follow the change, so that the amplitude of the final output signal is kept stable, and simultaneously the phase information of the link is kept unchanged.
The invention is described in further detail below with reference to the figures and specific embodiments.
Examples
The dynamic feedback ultrahigh-amplitude phase-stable amplifying circuit is mainly used for electronic components in electronic system equipment such as digital microwave communication, next-generation mobile communication, radars, optical fiber communication, optical fiber weaponry and the like.
In this embodiment, the ultra-high amplitude phase-stable amplifying circuit that completes dynamic feedback through a hardware circuit has the following main technical indicators describing the product performance: 1) an output power range; 2) the working temperature range; 3) output power stability; 4) phase stability. The power amplifier stabilizing device products of the same type generally adopt an ALC stabilizing method, and output power is kept unchanged by controlling a voltage-controlled attenuation unit through a detection output signal or another stable and fixed signal source is provided for compensating an output detector to counteract the stability of the detector, wherein the stability of the output power is kept due to temperature change.
The ultrahigh amplitude phase stable amplifying circuit based on dynamic feedback of the embodiment adopts a double dynamic control loop circuit based on dynamic threshold and dynamic feedback, adopts input signal coupling detection, then performs coupling detection on a signal through a voltage-controlled attenuation unit, an amplifying unit and an output signal, acquires a temperature change value through a temperature sensing unit, matches a change quantity through a subtraction slope, synthesizes the change quantity with two operational amplifying units through a difference synthesis unit to serve as a dynamic change quantity, inputs the dynamic threshold and the dynamic feedback into a comparison unit to be processed, and controls a voltage-controlled attenuation unit through a generated signal.
With reference to fig. 1 and fig. 2, the ultra-high amplitude-phase stable amplifying circuit with dynamic feedback of this embodiment is composed of 12 units, namely, a first coupling unit 1, a voltage-controlled attenuation unit 2, an amplifying unit 3, a second coupling unit 4, a first detection unit 5, a comparing unit 6, a second detection unit 7, a first operational amplifying unit 8, a difference synthesizing unit 9, a second operational amplifying unit 10, a subtraction slope matching unit 11, and a temperature sensing unit 12.
An input radio frequency signal passes through the first coupling unit 1, one port of which is connected to the input port of the voltage-controlled attenuation unit 2, the third port of the first coupling unit 1 is connected to the input end of the first detection unit 5, and the other port of the first detection unit 5 is connected to the input port of the first operational amplification unit 8.
The ultrahigh amplitude phase stable amplifying circuit with dynamic feedback of the embodiment is divided into two working states of a constant power and constant phase output mode under temperature change and a power and constant phase output mode under large-range change under temperature change. The design of double control loops is used for realizing the stability of amplitude-phase output, the first loop adopts a dynamic threshold loop design, the second loop adopts a dynamic feedback mode, and the two loops can work independently or simultaneously in a combined mode.
The working method of the dynamic feedback ultrahigh-amplitude phase-stable amplifying circuit comprises the following specific steps:
step S01, according to the frequency range of the required working signal, selecting the frequency range of the coupling unit 1, 2, the voltage-controlled attenuation unit, the amplification unit and the detection unit 1, 2 which actually apply the working frequency band;
step S02, according to the selected detection unit 1, detection unit 2 (using the same type detection unit) and temperature sensing unit sampling signal type discrimination; the detection unit is used for detecting whether the output signal is increased or decreased along with the increase of the input power, and the temperature sensing unit is used for detecting whether the output voltage is increased or decreased along with the increase of the temperature;
step S03, taking the example of selecting the detector element with increased power and the temperature sensor element with increased temperature as the example for analysis, and performing the same-direction change after the device with the detector element whose output voltage decreases due to the increase of input power adopts subtraction and inversion, and the same processing is performed if the temperature sensor element changes and also decreases with the increase of temperature;
step S04, matching the detection voltage change due to temperature change corresponding to the cancellation detection units 1 and 2 after the collected voltage corresponding to the temperature sensing unit passes through the subtraction slope matching unit;
step S05, adjusting the coupling value of the output signal according to the maximum value of the required output signal, and using the maximum value meeting the maximum linear detection range of the detection unit 2 as the maximum reference signal output by the detection unit 2; the voltage signal of V2 and the voltage signal of the difference synthesis unit are summed and then enter a comparison unit as a dynamic feedback signal V4;
step S06, synchronously adjusting the coupling value of the coupling unit 1 to meet the maximum value of the maximum linear detection range of the detection unit 1 as the output signal V1 of the detection unit 1, and adding the signal and the difference value synthesis unit (9) to enter a comparison unit (6) as a dynamic threshold signal V3;
in step S07, the control signal V5 outputted by the comparison unit (6) from the dynamic threshold signal V3 and the dynamic feedback signal V4 is used to control the voltage controlled attenuation unit (2);
step S08, the control signal V5 output by the comparison unit (6) meets the maximum amplitude change value under the condition of unchanged phase when the voltage-controlled attenuation unit (2) is controlled as a V5 signal;
step S09, when the input signal decreases synchronously, the dynamic threshold signal V3 decreases synchronously, and the dynamic feedback signal V4 decreases simultaneously, so that the control signal V5 output by the comparison unit (6) keeps unchanged dynamically, the output power is controllable and stable, and the phase from the input signal to the output signal also keeps unchanged;
step S10, when the input signal is kept unchanged and the gain of the link between the input and output signals is changed due to the temperature change, the output signal V1 of the detecting unit 1 is unchanged at this time and the corresponding dynamic threshold signal V3 is also kept unchanged, the output signal V2 of the detecting unit 2 is changed V2 ± Δ V2, which causes the dynamic feedback signal V4 to be correspondingly changed, and the dynamic threshold signal V3 is compared with the dynamic feedback signal V3583 to be unchanged, so that the control signal V5 is changed accordingly, thereby controlling the voltage-controlled attenuator unit to follow the change, so that the final output signal amplitude is kept stable, and the phase information of the link is also kept unchanged synchronously.
TABLE 1 values measured under conventional temperature compensation
Table 2 shows the variation of the circuit of the present invention at different temperatures and different output powers
The comparison of the test data shown in tables 1 to 2 shows that, after the link is added, the power variation is improved to be within 0.05dB from the original 0.52dB, and the phase variation is reduced to be within 0.15 DEG from the original 8 deg. The ultrahigh stability of the output power and the ultrahigh stability of the phase of the system are effectively improved.
In summary, the present invention has a characteristic that the amplitude and the phase of the output signal can be kept ultra-high and stable after the input signal passes through the amplifying circuit under the temperature change, and the output power and the phase of the output signal after the output signal passes through the amplifying circuit after the input signal power is changed synchronously are ultra-high and stable after the input signal power is changed in a large range. The invention adopts double control loops, can control loop dynamic regulation threshold and dynamic feedback control, and has the advantages of simple circuit topology, small circuit size, low cost and the like, and has wide application prospect.
Claims (10)
1. A dynamic feedback ultrahigh amplitude phase stable amplifying circuit is characterized in that the circuit is based on a double dynamic control loop formed by a dynamic threshold and dynamic feedback, and the circuit specifically comprises: the input signal is adopted for coupling detection, then the signal is coupled and detected through a voltage-controlled attenuation unit, an amplification unit and an output signal, and direct current signals output by two paths of coupling detection respectively enter corresponding operational amplifiers; the temperature change value is collected through the temperature sensing unit, the change quantity is matched through the subtraction slope, then the change quantity is respectively synthesized with the two operational amplification units of the coupling detection through the difference synthesis unit to be used as the dynamic change quantity, the dynamic change quantity is respectively input into the comparison unit for processing through the dynamic threshold and the dynamic feedback, and the generated signal controls the voltage-controlled attenuation unit.
2. The dynamic feedback ultrahigh-amplitude phase-stable amplification circuit according to claim 1, comprising a first coupling unit (1), a voltage-controlled attenuation unit (2), an amplification unit (3), a second coupling unit (4), a first detection unit (5), a comparison unit (6), a second detection unit (7), a first operational amplification unit (8), a difference synthesis unit (9), a second operational amplification unit (10), a subtraction slope matching unit (11), and a temperature sensing unit (12);
the first coupling unit (1), the voltage-controlled attenuation unit (2), the amplifying unit (3) and the second coupling unit (4) are sequentially connected between signal input and signal output;
the first coupling unit (1) is connected to one input end of a first operational amplification unit (8) through a first detection unit (5), and the second coupling unit (4) is connected to one input end of a second operational amplification unit (10) through a second detection unit (7);
the temperature sensing unit (12) is sequentially connected with the subtraction slope matching unit (11) and the difference synthesizing unit (9), one output end of the difference synthesizing unit (9) is connected to the other input end of the first operational amplifying unit (8), and the other output end of the difference synthesizing unit (9) is connected to the other input end of the second operational amplifying unit (10);
the output end of the first operational amplification unit (8) is connected with one input end of the comparison unit (6), the output end of the second operational amplification unit (10) is connected with the other input end of the comparison unit (6), and the output end of the comparison unit (6) is connected with the voltage-controlled attenuation unit (2).
3. The dynamic feedback ultra high amplitude phase stable amplifier circuit as claimed in claim 2, wherein the dual dynamic control loops, the first loop using dynamic threshold mode and the second loop using dynamic feedback mode, are operated independently or in combination.
4. The dynamic feedback ultrahigh-amplitude phase-stable amplifying circuit according to claim 2, wherein the first operational amplifying unit (8) outputs a dynamic threshold, the second operational amplifying unit (10) outputs a dynamic feedback signal, the dynamic threshold and the dynamic feedback signal are simultaneously compared in the comparing unit (6), and the comparison output signal is provided to the voltage-controlled attenuation unit (2) to form a feedback loop.
5. The dynamic feedback ultrahigh-amplitude phase-stable amplifier circuit according to claim 2, wherein the first detector element (5) and the second detector element (7) are of the same type.
6. The dynamic feedback ultrahigh-amplitude phase-stable amplifying circuit as claimed in claim 2, wherein the circuit is divided into two operating states of constant power and constant phase output under temperature variation and constant phase output under wide-range variation under temperature variation.
7. The dynamic feedback ultrahigh-amplitude phase-stable amplifying circuit according to claim 2, wherein the detected voltage variation due to the temperature variation corresponding to the first detecting unit (5) and the second detecting unit (7) is matched and canceled after the collected voltage of the temperature sensing unit (12) passes through the subtraction slope matching unit (11).
8. The ultra-high amplitude phase-stable amplifying circuit with dynamic feedback as claimed in claim 2, wherein the coupling value of the second coupling unit (4) is adjusted according to the maximum value of the required output signal, the maximum value satisfying the maximum linear detection range of the second detecting unit (7) is used as the output signal V2 of the second detecting unit (7), and the signal V2 is summed with the voltage signal passing through the difference synthesizing unit (9) and then enters the comparing unit (6) as the dynamic feedback signal V4.
9. The dynamic feedback ultrahigh-amplitude phase-stable amplifying circuit according to claim 2, wherein the coupling value of the first coupling unit (1) is adjusted to satisfy the maximum value of the maximum linear detection range of the first detecting unit (5) and is used as the output signal V1 of the first detecting unit (5), and the signal V1 is summed with the voltage signal of the difference synthesizing unit (9) and then enters the comparing unit (6) as the dynamic threshold signal V3.
10. A working method of a dynamic feedback ultrahigh amplitude phase stable amplifying circuit is characterized by comprising the following steps:
step S01, according to the frequency range of the required working signal, selecting the frequency ranges of the first coupling unit (1), the second coupling unit (4), the voltage-controlled attenuation unit (2), the amplification unit (3), the first detection unit (5) and the second detection unit (7) which actually apply the working frequency band;
and step S02, judging according to the types of the selected sampling signals of the first detection unit (5), the second detection unit (7) and the temperature sensing unit (12): the first detection unit (5) and the second detection unit (7) increase or decrease the output signals along with the increase of the input power, and the temperature sensing unit (12) increases or decreases the output voltage along with the increase of the temperature;
step S03, analyzing the detector unit with increased power and the temperature sensing unit (12) with increased temperature, and performing the same-direction change after the device with the detector unit whose output voltage decreases due to the increase of input power adopts subtraction and inversion, and performing the same process if the temperature sensing unit changes and also decreases with the increase of temperature;
step S04, matching and canceling detection voltage changes which are changed due to temperature changes and correspond to the first detection unit (5) and the second detection unit (7) after the collected voltage corresponding to the temperature sensing unit (12) passes through the subtraction slope matching unit (11);
step S05, according to the maximum value of the required output signal, adjusting the coupling value of the output signal to the maximum value satisfying the maximum linear detection range of the second detection unit (7), as the signal V2 which is the maximum reference signal output by the second detection unit (7); the signal V2 and the voltage signal output by the difference synthesis unit (9) are subjected to summation operation and then enter a comparison unit (6) as a dynamic feedback signal V4;
step S06, synchronously adjusting the coupling value of the first coupling unit (1) to the maximum value meeting the maximum linear detection range of the first detection unit (5) as the output signal V1 of the first detection unit (5), and after summing the signal V1 and the voltage signal output by the difference synthesis unit (9), entering the comparison unit (6) as the dynamic threshold signal V3;
in step S07, the control signal V5 outputted by the comparison unit (6) from the dynamic threshold signal V3 and the dynamic feedback signal V4 is used to control the voltage controlled attenuation unit (2);
step S08, the control signal output by the comparison unit (6) meets the maximum amplitude change value under the condition of unchanged phase when the voltage-controlled attenuation unit (2) is controlled as a signal V5;
step S09, when the input signal decreases synchronously, the dynamic feedback signal V4 decreases synchronously because the dynamic threshold signal V3 decreases synchronously, so that the control signal V5 output by the comparison unit (6) keeps unchanged dynamically, the output power is controllable and stable, and the phase from the input signal to the output signal also keeps unchanged;
step S10, when the input signal is kept unchanged and the gain of the link between the input signal and the output signal is changed due to the temperature change, the output signal V1 of the first detection unit (5) is unchanged at the moment, the corresponding dynamic threshold signal V3 is also kept unchanged, the output signal V2 of the second detection unit (7) generates a change V2 +/-DeltaV 2, the dynamic feedback signal V4 is correspondingly changed, and compared with the dynamic threshold signal V3, the dynamic threshold signal V3 is unchanged, so the control signal V5 is also changed, the voltage-controlled attenuation unit (2) is controlled to follow the change, the amplitude of the final output signal is kept stable, and the phase information of the link is synchronously kept unchanged.
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| CN202210689673.7A Pending CN115037256A (en) | 2022-06-17 | 2022-06-17 | Dynamic feedback ultrahigh-amplitude phase-stable amplifying circuit and working method thereof |
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| Country | Link |
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| CN (1) | CN115037256A (en) |
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2022
- 2022-06-17 CN CN202210689673.7A patent/CN115037256A/en active Pending
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