CN108418562A - microwave resonance amplifying device and system - Google Patents

microwave resonance amplifying device and system Download PDF

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Publication number
CN108418562A
CN108418562A CN201810576544.0A CN201810576544A CN108418562A CN 108418562 A CN108418562 A CN 108418562A CN 201810576544 A CN201810576544 A CN 201810576544A CN 108418562 A CN108418562 A CN 108418562A
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CN
China
Prior art keywords
amplifier
resonance
resonator
amplifying device
output end
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CN201810576544.0A
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Chinese (zh)
Inventor
严炜
袁刚
康鹏
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Chengdu Precision Technology Co Ltd
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Chengdu Precision Technology Co Ltd
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Priority to CN201810576544.0A priority Critical patent/CN108418562A/en
Publication of CN108418562A publication Critical patent/CN108418562A/en
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    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03FAMPLIFIERS
    • H03F3/00Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/68Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03HIMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00Networks using active elements
    • H03H11/02Multiple-port networks
    • H03H11/38One-way transmission networks, i.e. unilines

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

The present invention provides a kind of microwave resonance amplifying device and systems, are related to signal processing apparatus technical field.Microwave resonance amplifying device in the embodiment of the present application, the amplification of amplifier is first passed through by input signal, is amplified using the resonance of resonator, can be made microwave resonance amplifying device that can obtain similar gain in height frequency.Allow has higher gain by microwave resonance amplifying device treated signal, and microwave resonance amplifying device is made to have better Out-of-band rejection characteristic.When carrying out the design of printed circuit board, the influence without the concern for Insertion Loss to System noise figure, it is not necessary to design peripheral circuit, design structure can be simpler, and design process can be easier, improves design efficiency, and to the area occupied smaller of circuit board.

Description

Microwave resonance amplifying device and system
Technical field
The present invention relates to signal processing apparatus technical fields, in particular to a kind of microwave resonance amplifying device and are System.
Background technology
When handling signal, it is desirable to be able to reduce the interference signal in signal, the noise in reduction system.But believe In number processing procedure, often there is the case where interference signal can not being suppressed to available horizontal.
Invention content
In view of this, the present invention provides a kind of microwave resonance amplifying device and system, can realize to the more preferable of signal Processing.
Technical solution provided by the invention is as follows:
A kind of microwave resonance amplifying device, including:At least one resonance amplifier module, the resonance amplifier module include:
The first amplifier for that will be amplified by the external signal that input terminal obtains;
It is connect with the output end of the amplifier, for resonance and to being filtered output by amplified external signal The first resonance filter;Wherein, input terminal of the input terminal of first amplifier as the resonance amplifier module, it is described Output end of the output end of first amplifier as the resonance amplifier module, it is multiple when the resonance amplifier module is multiple The resonance amplifier module cascade Connection.
Further, the resonance amplifier module further includes:
The second amplifier being connect with the output end of first resonator, second amplifier are used for described in process The first amplified external signal of resonator resonance is amplified and exports;
The second resonator being connect with the output end of second amplifier, second resonator are used for described second The output signal of amplifier is carried out after resonance amplification and is exported, when the resonance amplifier module includes the first amplifier, first humorous Shake device, the second amplifier and the second resonator when, the output end of second resonator is as the defeated of the resonance amplifier module Outlet.
Further, the resonance amplifier module further includes:
The third amplifier being connect with the output end of second amplifier, the third amplifier are used for described in process The second amplified external signal of resonator resonance is amplified and exports;The resonance amplifier module include the first amplifier, When the first resonator, the second amplifier, the second resonator and third amplifier, described in the output end conduct of the third amplifier The output end of resonance amplifier module.
Further, the resonance amplifier module further includes:
The third resonator being connect with the output end of the third amplifier, the third resonator are used for the third The output signal of amplifier is carried out after resonance amplification and is exported, when the resonance amplifier module includes the first amplifier, first humorous Shake device, the second amplifier, the second resonator, third amplifier and third resonator when, the output end of the third resonator is made For the output end of the resonance amplifier module.
Further, the frequency response curve of first amplifier and first resonator is complementary, and described first puts The model MGA-86563 of big device.
Further, the frequency response curve of second amplifier and second resonator is complementary.
Further, the model MGA-86563 of second amplifier.
Further, the frequency response curve of the third amplifier and the third resonator is complementary.
Further, the model MGA-86563 of the third amplifier.
The present invention also provides a kind of microwave resonance amplification systems, including multiple above-mentioned microwave resonance amplifying devices.
Microwave resonance amplifying device in the embodiment of the present application, it is simple in structure.Input signal can first pass through amplifier Amplification, using resonator resonance amplify, it is close can so that microwave resonance amplifying device can be obtained in height frequency Gain.Allow has higher gain by microwave resonance amplifying device treated signal, and microwave resonance is made to amplify Device has better Out-of-band rejection characteristic.When carrying out the design of printed circuit board, without the concern for Insertion Loss to system noise The influence of system, it is not necessary to design peripheral circuit, design structure can be simpler, and design process can be easier, and raising is set Efficiency is counted, and to the area occupied smaller of circuit board.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment cited below particularly, and coordinate Appended attached drawing, is described in detail below.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this A little attached drawings obtain other relevant attached drawings.
Fig. 1 is a kind of schematic diagram of microwave resonance amplifying device provided in an embodiment of the present invention.
Fig. 2 is the schematic diagram of another microwave resonance amplifying device provided in an embodiment of the present invention.
Fig. 3 is a kind of circuit diagram of microwave resonance amplifying device provided in an embodiment of the present invention.
Fig. 4 is the schematic diagram of another microwave resonance amplifying device provided in an embodiment of the present invention.
Icon:10- microwave resonance amplifying devices;100- resonance amplifier modules;The first amplifiers of 101-;The first resonance of 102- Device;The second amplifiers of 103-;The second resonators of 104-;105- third amplifiers;106- third resonators.
Specific implementation mode
Below in conjunction with attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete Ground describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Usually exist The component of the embodiment of the present invention described and illustrated in attached drawing can be arranged and be designed with a variety of different configurations herein.Cause This, the detailed description of the embodiment of the present invention to providing in the accompanying drawings is not intended to limit claimed invention below Range, but it is merely representative of the selected embodiment of the present invention.Based on the embodiment of the present invention, those skilled in the art are not doing The every other embodiment obtained under the premise of going out creative work, shall fall within the protection scope of the present invention.
It should be noted that:Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi It is defined, then it further need not be defined and explained in subsequent attached drawing in a attached drawing.Meanwhile the present invention's In description, term " first ", " second " etc. are only used for distinguishing description, are not understood to indicate or imply relative importance.
Inventor has found, when use first filters the scheme amplified again and handles signal, due to filter itself Insertion Loss can influence the noise coefficient of entire signal processing system, and for filter if there is the Insertion Loss of 1dB, the noise coefficient of system will Increase 1dB, such signal processing system makes the Insertion Loss of filter be introduced directly into system noise, to serious shadow Ring the signal-to-noise ratio of signal.
In view of this, the embodiment of the present application provides a kind of microwave resonance amplifying device 10, including at least one resonance is put Big component 100, as shown in Figure 1, the resonance amplifier module 100 includes the first amplifier 101 and the first resonator 102.
First amplifier 101 by the external signal that input terminal obtains for will be amplified.First resonance filter with it is described The output end of amplifier connects, for resonance and to being filtered output by amplified external signal.First amplifier 101 Input signal can be amplified, and after the first resonator 102 is arranged on the output end of the first amplifier 101, first The input signal of resonator 102 is amplified by the first amplifier 101, in this way, input signal is passing through the first amplifier 101 After amplification, resonance amplification, the frequency range degree of suppression phase of the signal of the first resonator 102 output are carried out using the first resonator 102 Higher than simple frequency range degree of suppression by amplified signal, meanwhile, the loss of the signal of the first resonator 102 output Loss compared to the filtered signal of filtered device is also lower.In this way, input signal passes through the amplification of the first amplifier 101 After the resonance amplification of the second resonator 104, so that it may which to obtain, noise is lower, the higher output signal of gain so that input letter Number after treatment, useful signal can be made to be amplified, interference signal obtains a degree of inhibition.
When microwave resonance amplifying device 10 includes multiple resonance amplifier modules 100, multiple resonance amplifier modules 100 Cascade Connection.For example, when microwave resonance amplifying device 10 includes three resonance amplifier modules 100, a resonance amplifier module 100 input terminal is for receiving input signal, the output end of the resonance amplifier module 100 and next resonance amplifier module 100 Input terminal connection.The output end of second resonance amplifier module 100 connects with the input terminal of third resonance amplifier module 100 again It connects, the output end of the output end of third resonance amplifier module 100 as entire microwave resonance amplifying device 10.
In this way, microwave resonance amplifying device 10 includes multiple resonance amplifier modules 100, input signal is humorous by first After the first amplifier 101 and the processing of the first resonator 102 shaken in amplifier module 100, the interference signal in input signal is pressed down System is to a certain extent.But there may be such situations, only pass through the processing of an amplifier and a resonator, input signal In interference signal although inhibited, but be not suppressed to acceptable degree.If using only into one excessively The quality of the processing of resonance amplifier module 100, input signal still cannot be met the requirements, if such input signal inputted To other systems the normal work of other systems can be then influenced since interference signal noise is larger.Based on this, as shown in Fig. 2, Microwave resonance amplifying device 10 in the embodiment of the present application may include multiple resonance amplifier modules 100, be put by multiple resonance Big lasting processing of the component 100 to input signal, the interference signal in the inhibition input signal that can continue, makes treated The noise of input signal disclosure satisfy that the semaphore request of other systems.As shown in figure 3, Fig. 3 cascades for multiple resonance amplifier modules Circuit diagram under state.
It is understood that the frequency of the first amplifier 101 and the first resonator 102 in resonance amplifier module 100 is rung It should can be designed to complementary form, can make microwave resonance amplifying device 10 that can obtain similar increasing in height frequency Benefit.As previously mentioned, the signal-to-noise ratio of system can be seriously affected by first filtering the scheme amplified again.Compared to such scheme, the application is real Form of the microwave resonance amplifying device 10 in example using at least one resonance amplifier module 100 is applied, and signal is put in resonance It is the amplification for first passing through amplifier in big component 100, using the processing of resonator, after resonator is placed on amplifier, as long as Amplifier has enough gains, for example, amplifier has the gain of 10dB or more, then the Insertion Loss of resonator is for system noise The image of sound can be reduced to and can be ignored, and the influence to signal-to-noise ratio can also ignore, and reach the useful letter of amplification Number inhibit interference signal purpose.
In addition, inventor also found, in using the signal processing system amplified again is first filtered, this processing system wanted is only It can be for lower frequency and the signal processing of smaller bandwidth, in the frequency microwave signal for receiving a certain frequency range, due to amplification The frequency response of device is usually that high-band gain is relatively low, and low-band gain is higher.It is carried out again if be first filtered to signal Amplification, then being limited to noise consideration, the in-band frequency response curve of filter itself also can only be a horizontal linear, Filter can not just compensate the frequency response of amplifier.
And the microwave resonance amplifying device 10 in the embodiment of the present application is used, input signal first passes through the amplification of amplifier, Amplify using the resonance of resonator, can make microwave resonance amplifying device 10 that can obtain similar increasing in height frequency Benefit.
On the other hand, the amplifier operation in microwave resonance amplifying device 10 can also be higher than in resonant condition, gain amplifier The gain of disresonance magnifying state, and good Out-of-band rejection effect can be generated, so that being put by microwave resonance Treated that signal can have higher gain for big device 10, and microwave resonance amplifying device 10 be made to have better Out-of-band rejection Characteristic.
In another aspect, when carrying out the design of signal processing system on a printed circuit board, if amplified again using first filtering Scheme, due to needing to consider the Insertion Loss of filter, the Insertion Loss in order to reduce filter just needs to design corresponding circuit, designs Difficulty is higher, and can increase the area occupied of signal processing system on a printed circuit board.And use the microwave in the application humorous The amplifying device 10 that shakes is used as signal processing system, when carrying out the design of printed circuit board, without the concern for Insertion Loss to system noise The influence of sound system, it is not necessary to design peripheral circuit, design structure can be simpler, and design process can be easier, improves Design efficiency, and to the area occupied smaller of circuit board.
Wherein, input terminal of the input terminal of first amplifier 101 as the resonance amplifier module 100, described Output end of the output end of one amplifier 101 as the resonance amplifier module 100, the resonance amplifier module 100 are multiple When, multiple 100 cascade Connections of resonance amplifier module.
It is understood that when microwave resonance amplifying device 10 includes multiple resonance amplifier modules 100, multiple resonance are put 100 cascade Connection of big component.The noise coefficient of whole device may be used following formula and be calculated:
Wherein, Fn is the noise of each resonance amplifier module 100, and Gn is gain, and Ftotal is the overall noise of whole device.
It has been directly added into overall noise from the noise that can be seen that first order resonance amplifier module 100 in above-mentioned formula, the The noise of two level resonance amplifier module 100 is to subtract 1 again divided by the gain of the first order, and third level resonance amplifier module 100 is made an uproar Sound is also to subtract 1 divided by the product of first order resonance amplifier module 100 and second level resonance amplifier module 100.And so on, so From formula as can be seen that the generation of the overall noise of whole device, mainly in what preceding resonance amplifier module 100, behind with The increase of the quantity of cascade resonance amplifier module 100.Since gain is higher and higher, the ratio of noise will become increasingly It is low or even very little can be ignored.Microwave resonance amplifying device 10 in the embodiment of the present application is humorous by first amplifying again Amplification of shaking increases first order resonance amplifier module 100 while not increasing first order resonance 100 noise of amplifier module Gain, although adding somewhat to the noise of second level resonance amplifier module 100 simultaneously, increased noise is relative to increasing Benefit is very low, thereby reduces the overall noise of microwave resonance amplifying device 10.
In another embodiment specific implementation mode, as shown in figure 4, the resonance amplifier module 100 can also be put including second 103 and second resonator 104 of big device.
Second amplifier 103 is connect with the output end of first resonator 102, second amplifier 103 for pair It is amplified and exports by the amplified external signal of 102 resonance of the first resonator.
Second resonator 104 is connect with the output end of second amplifier 103, second resonator 104 for pair It after the output signal progress resonance amplification of second amplifier 103 and exports, when the resonance amplifier module 100 includes first When amplifier 101, the first resonator 102, the second amplifier 103 and the second resonator 104, second resonator 104 it is defeated Output end of the outlet as the resonance amplifier module 100.
When resonance amplifier module 100 includes an amplifier and a resonator, need through multiple resonance amplification groups Better signal processing effect is realized in the cascade of part 100.By being reconfigured the second amplifier 103 in resonance amplifier module 100 With the second resonator 104, when in order to realize better signal processing effect, it may not be necessary to pass through multiple resonance amplifier modules 100 cascade is realized.
It is understood that in order to realize better signal processing effect.The resonance amplifier module 100 can also wrap It includes:The third amplifier 105 being connect with the output end of second amplifier 103, the third amplifier 105 are used for passing through The amplified external signal of second resonator, 104 resonance is amplified and exports;The resonance amplifier module 100 includes the When one amplifier 101, the first resonator 102, the second amplifier 103, the second resonator 104 and third amplifier 105, described Output end of the output end of three amplifiers 105 as the resonance amplifier module 100.
The resonance amplifier module 100 can also include:The third being connect with the output end of the third amplifier 105 is humorous Shake device 106, and the third resonator 106 is used for after the output signal progress resonance amplification to the third amplifier 105 and defeated Go out, when the resonance amplifier module 100 is humorous including the first amplifier 101, the first resonator 102, the second amplifier 103, second Shake device 104, third amplifier 105 and third resonator 106 when, the output end of the third resonator 106 is as the resonance The output end of amplifier module 100.
In the embodiment of the present application, the model of first amplifier 101 can be MGA-86563.
It is understood that second amplifier 103 and the frequency response curve of second resonator 104 are complementary, It can make microwave resonance amplifying device 10 that can obtain similar gain in height frequency.The type of second amplifier 103 Number can be MGA-86563.
It is understood that the third amplifier 105 and the frequency response curve of the third resonator 106 are complementary, It can make microwave resonance amplifying device 10 that can obtain similar gain in height frequency.The type of the third amplifier 105 Number can be MGA-86563.
In conclusion the microwave resonance amplifying device in the embodiment of the present application, amplifier is first passed through by input signal Amplification is amplified using the resonance of resonator, and it is similar can so that microwave resonance amplifying device can be obtained in height frequency Gain.Allow has higher gain by microwave resonance amplifying device treated signal, makes microwave resonance amplification dress It sets with better Out-of-band rejection characteristic.When carrying out the design of printed circuit board, without the concern for Insertion Loss to system noise sonic system The influence of system, it is not necessary to design peripheral circuit, design structure can be simpler, and design process can be easier, improves design Efficiency, and to the area occupied smaller of circuit board.
The present invention also provides a kind of microwave resonance amplification systems, including multiple above-mentioned microwave resonance amplifying devices.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.It should be noted that:Similar label and letter exist Similar terms are indicated in following attached drawing, therefore, once being defined in a certain Xiang Yi attached drawing, are then not required in subsequent attached drawing It is further defined and is explained.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain Lid is within protection scope of the present invention.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. a kind of microwave resonance amplifying device, which is characterized in that including:At least one resonance amplifier module, the resonance amplification Component includes:
The first amplifier for that will be amplified by the external signal that input terminal obtains;
It is connect with the output end of the amplifier, for resonance and to being filtered the of output by amplified external signal One resonance filter;Wherein, input terminal of the input terminal of first amplifier as the resonance amplifier module, described first Output end of the output end of amplifier as the resonance amplifier module, it is multiple described when the resonance amplifier module is multiple Resonance amplifier module cascade Connection.
2. microwave resonance amplifying device according to claim 1, which is characterized in that the resonance amplifier module further includes:
The second amplifier being connect with the output end of first resonator, second amplifier are used for passing through described first The amplified external signal of resonator resonance is amplified and exports;
The second resonator being connect with the output end of second amplifier, second resonator are used for second amplification The output signal of device is carried out after resonance amplification and is exported, when the resonance amplifier module include the first amplifier, the first resonator, When the second amplifier and the second resonator, the output end of the output end of second resonator as the resonance amplifier module.
3. microwave resonance amplifying device according to claim 2, which is characterized in that the resonance amplifier module further includes:
The third amplifier being connect with the output end of second amplifier, the third amplifier are used for passing through described second The amplified external signal of resonator resonance is amplified and exports;The resonance amplifier module includes the first amplifier, first When resonator, the second amplifier, the second resonator and third amplifier, the output end of the third amplifier is as the resonance The output end of amplifier module.
4. microwave resonance amplifying device according to claim 3, which is characterized in that the resonance amplifier module further includes:
The third resonator being connect with the output end of the third amplifier, the third resonator are used to amplify the third The output signal of device is carried out after resonance amplification and is exported, when the resonance amplifier module include the first amplifier, the first resonator, When the second amplifier, the second resonator, third amplifier and third resonator, described in the output end conduct of the third resonator The output end of resonance amplifier module.
5. microwave resonance amplifying device according to any one of claims 1 to 4, which is characterized in that first amplification The frequency response curve of device and first resonator is complementary, the model MGA-86563 of first amplifier.
6. microwave resonance amplifying device according to claim 4, which is characterized in that second amplifier and described second The frequency response curve of resonator is complementary.
7. microwave resonance amplifying device according to claim 4, which is characterized in that the model of second amplifier MGA-86563。
8. microwave resonance amplifying device according to claim 4, which is characterized in that the third amplifier and the third The frequency response curve of resonator is complementary.
9. microwave resonance amplifying device according to claim 4, which is characterized in that the model of the third amplifier MGA-86563。
10. a kind of microwave resonance amplification system, which is characterized in that including the microwave described in multiple claim 1 to 9 any one Resonance amplification device.
CN201810576544.0A 2018-06-06 2018-06-06 microwave resonance amplifying device and system Pending CN108418562A (en)

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Application Number Priority Date Filing Date Title
CN201810576544.0A CN108418562A (en) 2018-06-06 2018-06-06 microwave resonance amplifying device and system

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Application Number Priority Date Filing Date Title
CN201810576544.0A CN108418562A (en) 2018-06-06 2018-06-06 microwave resonance amplifying device and system

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CN108418562A true CN108418562A (en) 2018-08-17

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1289483A (en) * 1998-01-23 2001-03-28 Adc束利查股份有限公司 A circuit arrangement for reducing passband ripple of a bandpass filter
CN1554146A (en) * 2001-09-13 2004-12-08 �ʼҷ����ֵ��ӹɷ����޹�˾ Active tunable filter circuit
FR2938706A1 (en) * 2008-11-14 2010-05-21 Thales Sa MINIATURE ACTIVE FILTER WITH LOW COST
CN103066932A (en) * 2012-12-17 2013-04-24 广州慧智微电子有限公司 Multistage radio frequency power amplifier circuit capable of reducing interference on ISM frequency band
CN104426411A (en) * 2013-08-28 2015-03-18 贵阳帕斯玛环保技术有限公司 Single-resonance high-frequency high-voltage power supply
CN106162495A (en) * 2016-08-03 2016-11-23 厦门傅里叶电子有限公司 The method improving Microspeaker performance
CN107425239A (en) * 2017-05-16 2017-12-01 中国电子科技集团公司第三十六研究所 A kind of restructural bandpass filter and preparation method thereof
CN206790446U (en) * 2017-05-26 2017-12-22 成都航天通信设备有限责任公司 A kind of low-noise amplifier applied to civil aviaton's frequency range
CN208299763U (en) * 2018-06-06 2018-12-28 成都精位科技有限公司 microwave resonance amplifying device and system

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1289483A (en) * 1998-01-23 2001-03-28 Adc束利查股份有限公司 A circuit arrangement for reducing passband ripple of a bandpass filter
CN1554146A (en) * 2001-09-13 2004-12-08 �ʼҷ����ֵ��ӹɷ����޹�˾ Active tunable filter circuit
FR2938706A1 (en) * 2008-11-14 2010-05-21 Thales Sa MINIATURE ACTIVE FILTER WITH LOW COST
CN103066932A (en) * 2012-12-17 2013-04-24 广州慧智微电子有限公司 Multistage radio frequency power amplifier circuit capable of reducing interference on ISM frequency band
CN104426411A (en) * 2013-08-28 2015-03-18 贵阳帕斯玛环保技术有限公司 Single-resonance high-frequency high-voltage power supply
CN106162495A (en) * 2016-08-03 2016-11-23 厦门傅里叶电子有限公司 The method improving Microspeaker performance
CN107425239A (en) * 2017-05-16 2017-12-01 中国电子科技集团公司第三十六研究所 A kind of restructural bandpass filter and preparation method thereof
CN206790446U (en) * 2017-05-26 2017-12-22 成都航天通信设备有限责任公司 A kind of low-noise amplifier applied to civil aviaton's frequency range
CN208299763U (en) * 2018-06-06 2018-12-28 成都精位科技有限公司 microwave resonance amplifying device and system

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