CN114124008A - Broadband self-adaptive AGC circuit and assembling method thereof - Google Patents
Broadband self-adaptive AGC circuit and assembling method thereof Download PDFInfo
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- CN114124008A CN114124008A CN202111340385.2A CN202111340385A CN114124008A CN 114124008 A CN114124008 A CN 114124008A CN 202111340385 A CN202111340385 A CN 202111340385A CN 114124008 A CN114124008 A CN 114124008A
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 230000003321 amplification Effects 0.000 claims abstract description 44
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 44
- 238000001514 detection method Methods 0.000 claims abstract description 41
- 230000008878 coupling Effects 0.000 claims abstract description 24
- 238000010168 coupling process Methods 0.000 claims abstract description 24
- 238000005859 coupling reaction Methods 0.000 claims abstract description 24
- 230000010354 integration Effects 0.000 claims abstract description 16
- 230000008569 process Effects 0.000 claims description 22
- 230000003044 adaptive effect Effects 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 10
- 239000010409 thin film Substances 0.000 claims description 8
- 239000003990 capacitor Substances 0.000 claims description 7
- 239000012212 insulator Substances 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000000853 adhesive Substances 0.000 claims description 6
- 230000001070 adhesive effect Effects 0.000 claims description 6
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 5
- 239000010931 gold Substances 0.000 claims description 4
- 229910052737 gold Inorganic materials 0.000 claims description 4
- 238000002788 crimping Methods 0.000 claims description 2
- 230000008859 change Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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- 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
- H03G3/3036—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers
- H03G3/3042—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers in modulators, frequency-changers, transmitters or power amplifiers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/50—Assembly of semiconductor devices using processes or apparatus not provided for in a single one of the subgroups H01L21/06 - H01L21/326, e.g. sealing of a cap to a base of a container
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- General Physics & Mathematics (AREA)
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Abstract
The invention discloses a broadband self-adaptive AGC circuit and an assembly method thereof, belonging to the electronic field, comprising an attenuation circuit, a low-noise amplification circuit, a coupling circuit and a feedback loop, wherein the feedback loop comprises a detection circuit, an amplification circuit and an integration circuit; the attenuation circuit is connected with the low-noise amplification circuit, the low-noise amplification circuit is connected with the coupling circuit, the coupling circuit is connected with the detection circuit, the detection circuit is connected with the amplification circuit, the amplification circuit is connected with the integration circuit, and the integration circuit is connected with the attenuation circuit. The invention is realized based on a single channel, completes the broadband reception of a target radio frequency signal, completes the automatic gain control function of the single channel fast self-adaptation when a large signal is input, expands the dynamic range of a receiver of an electronic warfare system, can realize the AGC function of the system fast self-adaptation and simultaneously reduces the complexity of the system.
Description
Technical Field
The invention relates to the field of electronics, in particular to a broadband self-adaptive AGC circuit and an assembling method thereof.
Background
Modern electronic warfare receivers require instantaneous wideband frequency coverage, high sensitivity and high dynamic range, and the adoption of wideband AGC (Automatic Gain Control) Control is one of the main ways to obtain high dynamics. The AGC realization mode commonly used by the current electronic warfare receiver is single-pulse automatic gain control, and the mode needs to be realized by adopting double radio frequency channels at the same time: one channel finishes rapid acquisition of target characteristic parameters (frequency, repetition frequency, pulse width, amplitude and other parameters), judges whether the channel is saturated or not by utilizing the acquired amplitude information, and then decides whether to start rapid AGC automatic gain control on the other channel (signals need to be subjected to certain delay processing by a delay circuit), and the way can ensure that the channel has certain dynamic expansion, but increases a radio frequency channel and improves the system complexity.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a broadband self-adaptive AGC circuit and an assembly method thereof, which are realized on the basis of a single channel, complete broadband reception of a target radio-frequency signal, complete the automatic gain control function of single channel quick self-adaptation when a large signal is input, expand the dynamic range of a receiver of an electronic warfare system, realize the function of the quick self-adaptive AGC of the system and reduce the complexity of the system at the same time.
The purpose of the invention is realized by the following scheme:
a broadband self-adaptive AGC circuit comprises an attenuation circuit, a low-noise amplification circuit, a coupling circuit and a feedback loop, wherein the feedback loop comprises a detection circuit, an amplification circuit and an integration circuit; the attenuation circuit is connected with the low-noise amplification circuit, the low-noise amplification circuit is connected with the coupling circuit, the coupling circuit is connected with the detection circuit, the detection circuit is connected with the amplification circuit, the amplification circuit is connected with the integration circuit, and the integration circuit is connected with the attenuation circuit.
Furthermore, the attenuation circuit has the function of realizing that the attenuation value of the ACG circuit is linearly increased and decreased along with the change of the signal amplitude when the automatic gain control loop works.
Further, the low-noise amplification circuit is used for realizing a low-noise amplification function and providing gain for the channel.
Furthermore, the coupling circuit is used for realizing the function of coupling the radio-frequency signals, the straight-through branch is directly output to the rear-stage circuit, and the coupling branch is used for feedback detection.
Further, the detection circuit comprises a logarithmic detection circuit, and the function of the logarithmic detection circuit is to realize continuous logarithmic detection and amplification of the radio-frequency signal.
Further, the amplifying circuit is used for amplifying the video signal after logarithmic detection.
Furthermore, the integrating circuit is used for comparing the video signal after detection and amplification and converting the waveform, and feeding back the voltage after shaping and conversion to the attenuating circuit to form a feedback loop so as to complete the feedback control function.
Further, the attenuation circuit includes a PIN diode attenuation circuit.
Further, the PIN diode attenuation circuit is provided with four PIN diodes.
An assembling method based on the wideband adaptive AGC circuit comprises the following steps:
the first step is as follows: the manufacturing of the amplifying circuit and the integrating circuit thin-film circuit is completed by adopting a thin-film production process, and the assembling of the amplifying circuit, the integrating circuit and the attenuating circuit is completed according to a miniaturized micro-assembly process;
the second step is that: assembling the low-noise amplifying circuit and the detection circuit according to a micro-assembly process;
the third step: adopting conductive adhesive to bond a low-noise amplifying circuit, a detection circuit, an amplifying circuit, an integrating circuit and an attenuating circuit in a microwave cavity according to a micro-assembly process;
the fourth step: bonding a microstrip transmission line, a microstrip coupler, a PIN diode, a fixed attenuation chip and a chip capacitor in a microwave cavity by adopting conductive adhesive according to a micro-assembly process;
the fifth step: an SMA joint, an insulator and a grounding post are arranged in the microwave cavity;
and a sixth step: the interconnection of the SMA connector and the microstrip transmission line wrapping tape is completed according to a micro-assembly process;
the seventh step: the mutual gold wire or gold belt interconnection of the PIN diode, the chip capacitor, the low-noise amplifying circuit, the detection circuit, the amplifying circuit, the integrating circuit, the attenuating circuit, the fixed attenuating chip, the insulator, the grounding column, the microstrip coupler and the microstrip transmission line is completed according to a micro-assembly process;
eighth step: and completing the compression joint of the deflection coil according to a micro-assembly process.
The beneficial effects of the invention include:
the embodiment of the invention can realize the function of broadband receiving and can cover the frequency range of 2 GHz-18 GHz.
The embodiment of the invention can realize the function of single-channel self-adaptive automatic gain control, when the small signal input is not started, the circuit is in a linear low-noise amplification working mode, and after the large signal input is started, the output power can be kept unchanged at a set threshold value, so that the post-stage circuit is ensured to be in an optimal working state.
The embodiment of the invention can realize different requirements for expanding the dynamic range by increasing or decreasing the number of the PIN attenuation diode stages.
The embodiment of the invention can adjust the AGC input power start control power threshold by setting different comparison voltage thresholds.
The embodiment of the invention can realize different power output power values after control starting through simple debugging.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic block diagram of a wideband adaptive AGC circuit according to an embodiment of the present invention;
fig. 2 is a PIN diode attenuation circuit in an embodiment of the present invention, which implements attenuation of radio frequency signals by using the characteristic that when a forward voltage is applied to a PIN diode, a resistance changes with a current change;
FIG. 3 is a low noise amplifier circuit according to an embodiment of the present invention, providing low noise amplification of small signals and sufficient gain for the channel;
FIG. 4 is a coupling circuit according to an embodiment of the present invention;
fig. 5 shows the logarithmic detection circuit in the embodiment of the present invention, which has wide working frequency coverage and large dynamic range, and generally, a stage of operational amplifier is added at the rear stage of the logarithmic amplification circuit to complete the amplification function;
FIG. 6 is an amplifying circuit according to an embodiment of the present invention;
FIG. 7 is a diagram of an integration circuit for integral compensation in waveform conversion, amplification and feedback control of a circuit according to an embodiment of the present invention;
FIG. 8 shows characteristic parameters of a PIN diode according to an embodiment of the present invention, wherein the PIN diode with different parameters can be selected according to different dynamic requirements;
FIG. 9 is a logarithmic slope dynamics and DC drift test curve for the logarithmic detection circuit in an embodiment of the present invention;
FIG. 10 is a simulation curve of a coupling circuit according to an embodiment of the present invention;
FIG. 11 is an amplifying circuit and an integrating circuit implemented by thin film technology according to an embodiment of the present invention;
fig. 12 is an assembled view of an AGC circuit in an embodiment of the present invention;
in the figure, 1-PIN diode, 2-low noise amplifier circuit, 3-microstrip coupler, 4-detector circuit, 5-amplifier circuit, 6-integrator circuit, 7-attenuator circuit, 8-fixed attenuator chip, 9-SMA connector, 10-microstrip transmission line, 11-insulator, 12-grounding column, 13-bias coil, 14-chip capacitor, and 15-microwave cavity.
Detailed Description
All features disclosed in all embodiments in this specification, or all methods or process steps implicitly disclosed, may be combined and/or expanded, or substituted, in any way, except for mutually exclusive features and/or steps. In the description of the present invention, the terms "thin film manufacturing process", "micro-assembly process", and the like are used as industry-specific terms only for the convenience of describing the present invention, and thus, should not be construed as limiting the present invention.
Example 1: as shown in fig. 1, a wideband adaptive AGC circuit includes an attenuation circuit, a low noise amplification circuit, a coupling circuit, and a feedback loop, where the feedback loop includes a detection circuit, an amplification circuit, and an integration circuit; the attenuation circuit is connected with the low-noise amplification circuit, the low-noise amplification circuit is connected with the coupling circuit, the coupling circuit is connected with the detection circuit, the detection circuit is connected with the amplification circuit, the amplification circuit is connected with the integration circuit, and the integration circuit is connected with the attenuation circuit.
Example 2: on the basis of the embodiment 1, the attenuation circuit has the function of realizing that the attenuation value of the ACG circuit is linearly increased or decreased along with the change of the signal amplitude when the automatic gain control loop works. In the present embodiment, the attenuation circuit is provided with a plurality of PIN diode attenuation circuits, the connection relationship is shown in fig. 2, and the characteristic parameters of the PIN diodes are shown in fig. 8. In a particular application, the number of PIN diodes may be four. In a specific application, an attenuation circuit capable of achieving the above function in the prior art can be adopted, and details are not described here.
Example 3: on the basis of embodiment 1, the low-noise amplification circuit is used for realizing a low-noise amplification function and providing a gain for a channel. In the present embodiment, the structure of the low noise amplifier circuit in specific application is shown in fig. 3. In specific applications, a low-noise amplifier circuit capable of achieving the above-mentioned effects in the prior art can be used, and details are not described here.
Example 4: on the basis of the embodiment 1, the coupling circuit is used for realizing the radio frequency signal coupling function, the straight-through branch is directly output to the post-stage circuit, and the coupling branch is used for feedback detection. In this embodiment, the structure of the broadband coupling circuit is shown in fig. 4, and the simulation curve thereof is shown in fig. 10. In a specific application, a coupling circuit capable of achieving the above function in the prior art may also be used, and details are not described here.
Example 5: on the basis of the embodiment 1, the detection circuit comprises a logarithmic detection circuit, and the function of the detection circuit is to realize continuous logarithmic detection and amplification of the radio-frequency signal. In the present embodiment, the circuit configuration of the logarithmic detector circuit is shown in fig. 5, and the logarithmic slope dynamics and the dc drift test curve are shown in fig. 9. In specific applications, a logarithmic detection circuit capable of achieving the above-mentioned effects in the prior art can be adopted, and details are not described here.
Example 8: based on any one of the above embodiments, the present embodiment provides the assembling method of any one of the above embodiments, as shown in fig. 12, including the following steps:
the first step is as follows: as shown in fig. 11, the thin film circuit fabrication of the amplifying circuit 5 and the integrating circuit 6 is completed by a thin film production process, and the assembly of the amplifying circuit 5, the integrating circuit 6 and the attenuating circuit 7 is completed by a miniaturized micro-assembly process;
the second step is that: assembling the low-noise amplifying circuit 2 (2) and the detection circuit 4 according to a micro-assembly process;
the third step: bonding the low-noise amplifying circuit 2, the detection circuit 4, the amplifying circuit 5, the integrating circuit 6 and the attenuating circuit 7 in the microwave cavity 15 by adopting conductive adhesive according to a micro-assembly process;
the fourth step: adopting conductive adhesive to bond a microstrip transmission line 10, a microstrip coupler 3, a PIN diode 1, a fixed attenuation chip 8 and a chip capacitor 14 in a microwave cavity 15 according to a micro-assembly process;
the fifth step: an SMA joint 9, an insulator 11 and a grounding post 12 are arranged in the microwave cavity 15;
and a sixth step: completing the wrapping interconnection of the SMA connector 9 and the microstrip transmission line 10 according to a micro-assembly process;
the seventh step: mutual wire or gold band interconnection of a PIN diode 1, a chip capacitor 14, a low-noise amplification circuit 2, a detection circuit 4, an amplification circuit 5, an integration circuit 6, an attenuation circuit 7, a fixed attenuation chip 8, an insulator 11, a grounding column 12, a microstrip coupler 3, a microstrip transmission line 10 and the like is completed according to a micro-assembly process;
eighth step: and completing the crimping of the deflection coil 13 according to a micro-assembly process. The assembly is thus complete.
The parts not involved in the present invention are the same as or can be implemented using the prior art.
The above-described embodiment is only one embodiment of the present invention, and it will be apparent to those skilled in the art that various modifications and variations can be easily made based on the application and principle of the present invention disclosed in the present application, and the present invention is not limited to the method described in the above-described embodiment of the present invention, so that the above-described embodiment is only preferred, and not restrictive.
Other embodiments than the above examples may be devised by those skilled in the art based on the foregoing disclosure, or by adapting and using knowledge or techniques of the relevant art, and features of various embodiments may be interchanged or substituted and such modifications and variations that may be made by those skilled in the art without departing from the spirit and scope of the present invention are intended to be within the scope of the following claims.
Claims (10)
1. A broadband self-adaptive AGC circuit is characterized by comprising an attenuation circuit, a low-noise amplification circuit, a coupling circuit and a feedback loop, wherein the feedback loop comprises a detection circuit, an amplification circuit and an integration circuit; the attenuation circuit is connected with the low-noise amplification circuit, the low-noise amplification circuit is connected with the coupling circuit, the coupling circuit is connected with the detection circuit, the detection circuit is connected with the amplification circuit, the amplification circuit is connected with the integration circuit, and the integration circuit is connected with the attenuation circuit.
2. The adaptive wide band AGC circuit of claim 1, wherein the attenuation circuit is configured to increase or decrease the attenuation value linearly with the signal amplitude when the ACG circuit is active in the AGC loop.
3. The wide-band adaptive AGC circuit of claim 1, wherein the low noise amplifier circuit is operative to perform low noise amplification to provide gain to the channel.
4. The adaptive AGC circuit as claimed in claim 1, wherein the coupling circuit is used to couple RF signals, the through branch is directly fed to the post-stage circuit, and the coupling branch is used for feedback detection.
5. The wide-band adaptive AGC circuit of claim 1, wherein the detection circuit includes a logarithmic detection circuit operative to perform continuous logarithmic detection amplification of the RF signal.
6. A wideband adaptive AGC circuit as claimed in claim 1, wherein the amplification circuit is operative to perform logarithmic detected amplification of the video signal.
7. The adaptive wide band AGC circuit of claim 1, wherein the integrator circuit is configured to compare the detected and amplified video signal and transform the waveform of the detected and amplified video signal, and feed back the shaped and transformed voltage to the attenuator circuit to form a feedback loop, thereby performing the feedback control function.
8. The wide band adaptive AGC circuit of claim 7, wherein the attenuation circuit comprises a PIN diode attenuation circuit.
9. The wide band adaptive AGC circuit of claim 8, wherein the PIN diode attenuation circuit is provided with four PIN diodes.
10. A method for assembling a wideband adaptive AGC circuit according to any one of claims 1 to 9, comprising the steps of:
the first step is as follows: the manufacturing of the thin film circuits of the amplifying circuit (5) and the integrating circuit (6) is completed by adopting a thin film production process, and the assembling of the amplifying circuit (5), the integrating circuit (6) and the attenuating circuit (7) is completed according to a miniaturized micro-assembly process;
the second step is that: assembling the low-noise amplifying circuit (2) and the detection circuit (4) according to a micro-assembly process;
the third step: bonding a low-noise amplification circuit (2), a detection circuit (4), an amplification circuit (5), an integration circuit (6) and an attenuation circuit (7) in a microwave cavity (15) by adopting conductive adhesive according to a micro-assembly process;
the fourth step: bonding a microstrip transmission line (10), a microstrip coupler (3), a PIN diode (1), a fixed attenuation chip (8) and a chip capacitor (14) in a microwave cavity (15) by adopting conductive adhesive according to a micro-assembly process;
the fifth step: an SMA joint (9), an insulator (11) and a grounding post (12) are arranged in a microwave cavity (15);
and a sixth step: the interconnection of the SMA connector (9) and the microstrip transmission line (10) in a wrapping manner is completed according to a micro-assembly process;
the seventh step: the PIN diode (1), the chip capacitor (14), the low-noise amplifying circuit (2), the detection circuit (4), the amplifying circuit (5), the integrating circuit (6), the attenuating circuit (7), the fixed attenuating chip (8), the insulator (11), the grounding column (12), the microstrip coupler (3) and the microstrip transmission line (10) are mutually connected by gold wires or gold bands according to a micro-assembly process;
eighth step: and completing the crimping of the deflection coil (13) according to a micro-assembly process.
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| CN202111340385.2A CN114124008A (en) | 2021-11-12 | 2021-11-12 | Broadband self-adaptive AGC circuit and assembling method thereof |
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| CN202111340385.2A CN114124008A (en) | 2021-11-12 | 2021-11-12 | Broadband self-adaptive AGC circuit and assembling method thereof |
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