CN102377390A - Method for controlling gain and attenuation of broadband low-noise amplifier - Google Patents
Method for controlling gain and attenuation of broadband low-noise amplifier Download PDFInfo
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- CN102377390A CN102377390A CN2010102503308A CN201010250330A CN102377390A CN 102377390 A CN102377390 A CN 102377390A CN 2010102503308 A CN2010102503308 A CN 2010102503308A CN 201010250330 A CN201010250330 A CN 201010250330A CN 102377390 A CN102377390 A CN 102377390A
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- gain amplifier
- adjustable attenuator
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Abstract
The invention provides a method for controlling gain and attenuation of a broadband low-noise amplifier. A main gain amplifier and an auxiliary gain amplifier are arranged between a radio frequency input end and an output end of the amplifier, an output end of the main gain amplifier is connected with a main adjustable attenuator, an output end of the main adjustable attenuator is connected with a multilevel radio frequency gain amplifier, the multilevel radio frequency gain amplifier is connected with the output end of the amplifier, an input end of the auxiliary gain amplifier is connected with an auxiliary adjustable attenuator, the auxiliary adjustable attenuator and the auxiliary gain amplifier are connected with the main gain amplifier in parallel, the main gain amplifier and the auxiliary gain amplifier respectively have a fixed gain value. through the on/off of the main gain amplifier and the auxiliary gain amplifier, the respective adjustment values of the main adjustable attenuator, the auxiliary adjustable attenuator and the multilevel radio frequency gain amplifier are combined at the output end of the amplifier to obtain a linear gain or attenuation value; meanwhile, the gain value and the attenuation value range are enlarged, thus the dynamic range can be greatly increased, strong interference can be restrained and nonlinear distortion can be eliminated.
Description
Technical field
The present invention relates to electricity field, relate in particular to microwave circuit, particularly a kind of method that is used to control the gain and the decay of wide frequency low-noise amplifier.
Background technology
In the prior art, the wireless access radio circuit is widely used in wireless connections and the information exchange between the realization equipment.Low noise amplifier is the major part of radio-frequency receiver front-end.In order to suppress the influence of subsequent stages noise to system, low noise amplifier needs certain gain, but excessive gain can make the frequency mixer of wide frequency low-noise amplifier back transship; Produce nonlinear distortion, simultaneously, wide frequency low-noise amplifier is the linear amplifier of small-signal; Because receive the influence of transmission path, the power of signal changes, when acknowledge(ment) signal, often exist strong jamming to get into; Therefore gain and decay need be adjustable, to obtain bigger linearity and dynamic range.
Summary of the invention
The purpose of this invention is to provide a kind of method that is used to control the gain and the decay of wide frequency low-noise amplifier, the method for described gain that is used for controlling wide frequency low-noise amplifier and decay will solve the prior art wide frequency low-noise amplifier and produce nonlinear distortion and the little technical problem of dynamic range.
The control method of this gain that is used for wide frequency low-noise amplifier of the present invention and decay comprises a process of between rf inputs and amplifier out, regulating gain; Wherein, A master gain amplifier and an assist gain amplifier are set between rf inputs and amplifier out; Output at the master gain amplifier connects a main adjustable attenuator; Output at main adjustable attenuator connects a multi-level RF gain amplifier; The multi-level RF gain amplifier is connected with described amplifier out, connects an auxiliary adjustable attenuator in the assist gain amplifier input terminal, and the input of auxiliary adjustable attenuator is connected with the master gain amplifier input terminal; The output of assist gain amplifier is connected with the output of master gain amplifier; Master gain amplifier and assist gain amplifier have fixing yield value respectively, utilize the startup of master gain amplifier and assist gain amplifier and close, the regulated value separately of main adjustable attenuator, auxiliary adjustable attenuator and multi-level RF gain amplifier, obtain linear gain or pad value in the amplifier out combination.
Further; Master gain Amplifier Gain value is 20dB; Assist gain Amplifier Gain value is 25dB; The gain of main adjustable attenuator and auxiliary adjustable attenuator or pad value be 0dB ,-5dB ,-10dB ,-15dB ,-20dB ,-25dB ,-30dB and-35dB; The yield value of multi-level RF gain amplifier is 10dB, 11dB, 12dB, 13dB and 14dB; Utilization utilize the startup of master gain amplifier and assist gain amplifier and close, the combination of the regulated value separately of main adjustable attenuator, auxiliary adjustable attenuator and multi-level RF gain amplifier, obtain gain or pad value at amplifier out from 44dB to-35dB, the stepping of gain or pad value is-1dB.
Operation principle of the present invention is: utilize the startup of master gain amplifier and assist gain amplifier and close; The different separately regulated value that cooperates main adjustable attenuator, auxiliary adjustable attenuator and multi-level RF gain amplifier; The combination back obtains linear gain and pad value at amplifier out, has enlarged the scope of yield value and pad value simultaneously, thereby can improve dynamic range greatly; Suppress strong jamming, eliminate nonlinear distortion.
The present invention compared with prior art, its effect be actively with significantly.The present invention utilize current gain value master gain amplifier and assist gain amplifier startup and close; The different separately regulated value that cooperates main adjustable attenuator, auxiliary adjustable attenuator and multi-level RF gain amplifier; The combination back obtains linear gain or pad value at amplifier out, has enlarged the scope of yield value and pad value simultaneously, thereby can improve dynamic range greatly; Suppress strong jamming, eliminate nonlinear distortion.
Description of drawings
Fig. 1 is the circuit diagram of an embodiment of the method for gain that is used to control wide frequency low-noise amplifier of the present invention and decay.
Embodiment
Embodiment 1:
As shown in Figure 1; Gain and the decay control method that is used for wide frequency low-noise amplifier of the present invention comprises a process of between rf inputs RF input and amplifier out output, regulating gain; Wherein, A master gain amplifier LNA1 and an assist gain amplifier LNA2 are set between rf inputs RF input and amplifier out output; Output at master gain amplifier LNA1 connects a main adjustable attenuator Att2; Output at main adjustable attenuator Att2 connects a multi-level RF gain amplifier RFG; Multi-level RF gain amplifier RFG is connected with described amplifier out output, and at auxiliary adjustable attenuator Att1 of input connection of assist gain amplifier LNA2, the input of auxiliary adjustable attenuator Att1 is connected with the input of master gain amplifier LNA1; The output of assist gain amplifier LNA2 is connected with the output of master gain amplifier LNA1; Master gain amplifier LNA1 and assist gain amplifier LNA2 have fixing yield value respectively, utilize the startup of master gain amplifier LNA1 and assist gain amplifier LNA2 and close, the regulated value separately of main adjustable attenuator Att2, auxiliary adjustable attenuator Att1 and multi-level RF gain amplifier RFG, obtain linear gain and pad value in amplifier out output combination.
Further; The yield value of master gain amplifier LNA1 is 20dB; The yield value of assist gain amplifier LNA2 is 25dB; The yield value of main adjustable attenuator Att2 and auxiliary adjustable attenuator Att1 be 0dB ,-5dB ,-10dB ,-15dB ,-20dB ,-25dB ,-30dB and-35dB; The yield value of multi-level RF gain amplifier RFG is 10dB, 11dB, 12dB, 13dB and 14dB; Utilization utilize the startup of master gain amplifier LNA1 and assist gain amplifier LNA2 and close, the combination of the regulated value separately of main adjustable attenuator Att2, auxiliary adjustable attenuator Att1 and multi-level RF gain amplifier RFG, obtain gain or pad value at amplifier out output from 44dB to-35dB, the stepping of gain or pad value is-1dB.
The course of work of present embodiment is: utilize the startup of master gain amplifier LNA1 and assist gain amplifier LNA2 and close; The different separately regulated value that cooperates main adjustable attenuator Att2, auxiliary adjustable attenuator Att1 and multi-level RF gain amplifier RFG; The combination back obtains linear gain or pad value at amplifier out output, has enlarged the scope of yield value and pad value simultaneously, thereby can improve dynamic range greatly; Suppress strong jamming, eliminate nonlinear distortion.
The yield value of master gain amplifier LNA1, the yield value of assist gain amplifier LNA2, the yield value of main adjustable attenuator Att2 and auxiliary adjustable attenuator Att1 can be any rational combination, is not limited to the value that present embodiment is mentioned.
Claims (2)
1. method that is used to control the gain and the decay of wide frequency low-noise amplifier; Comprise a process of between rf inputs and amplifier out, regulating gain; It is characterized in that: a master gain amplifier and an assist gain amplifier are set between rf inputs and amplifier out; Output at the master gain amplifier connects a main adjustable attenuator; Output at main adjustable attenuator connects a multi-level RF gain amplifier; The multi-level RF gain amplifier is connected with described amplifier out, connects an auxiliary adjustable attenuator in the assist gain amplifier input terminal, and the input of auxiliary adjustable attenuator is connected with the master gain amplifier input terminal; The output of assist gain amplifier is connected with the output of master gain amplifier; Master gain amplifier and assist gain amplifier have fixing yield value respectively, utilize the startup of master gain amplifier and assist gain amplifier and close, the regulated value separately of main adjustable attenuator, auxiliary adjustable attenuator and multi-level RF gain amplifier, obtain linear gain or pad value in the amplifier out combination.
2. the control method that is used for the gain and the decay of wide frequency low-noise amplifier as claimed in claim 1; It is characterized in that: master gain Amplifier Gain value is 20dB; Assist gain Amplifier Gain value is 25dB; The gain of main adjustable attenuator and auxiliary adjustable attenuator or pad value be 0dB ,-5dB ,-10dB ,-15dB ,-20dB ,-25dB ,-30dB and-35dB; The yield value of multi-level RF gain amplifier is 10dB, 11dB, 12dB, 13dB and 14dB; Utilize the startup of master gain amplifier and assist gain amplifier and close, the combination of the regulated value separately of main adjustable attenuator, auxiliary adjustable attenuator and multi-level RF gain amplifier, obtain gain or pad value at amplifier out from 44dB to-35dB, the stepping of gain or pad value is-1dB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102503308A CN102377390A (en) | 2010-08-11 | 2010-08-11 | Method for controlling gain and attenuation of broadband low-noise amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102503308A CN102377390A (en) | 2010-08-11 | 2010-08-11 | Method for controlling gain and attenuation of broadband low-noise amplifier |
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| CN102377390A true CN102377390A (en) | 2012-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010102503308A Pending CN102377390A (en) | 2010-08-11 | 2010-08-11 | Method for controlling gain and attenuation of broadband low-noise amplifier |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103513158A (en) * | 2013-09-18 | 2014-01-15 | 西安交通大学 | Damped oscillatory wave lower cable local discharge detection device and method |
| CN104953983A (en) * | 2014-02-27 | 2015-09-30 | 天工方案公司 | Systems, devices and methods related to radio-frequency step attenuators |
| CN113644882A (en) * | 2021-10-18 | 2021-11-12 | 芯灵通(天津)科技有限公司 | Variable gain low noise amplifier based on attenuator |
| CN115833765A (en) * | 2023-02-21 | 2023-03-21 | 成都川美新技术股份有限公司 | Adjustable gain amplifier equipment |
-
2010
- 2010-08-11 CN CN2010102503308A patent/CN102377390A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103513158A (en) * | 2013-09-18 | 2014-01-15 | 西安交通大学 | Damped oscillatory wave lower cable local discharge detection device and method |
| CN103513158B (en) * | 2013-09-18 | 2017-01-11 | 西安交通大学 | Damped oscillatory wave lower cable local discharge detection device and method |
| CN104953983A (en) * | 2014-02-27 | 2015-09-30 | 天工方案公司 | Systems, devices and methods related to radio-frequency step attenuators |
| CN104953983B (en) * | 2014-02-27 | 2019-04-05 | 天工方案公司 | System, apparatus and method related with radio frequency step attenuator |
| US10622970B2 (en) | 2014-02-27 | 2020-04-14 | Skyworks Solutions, Inc. | Attenuators for electronic applications |
| CN113644882A (en) * | 2021-10-18 | 2021-11-12 | 芯灵通(天津)科技有限公司 | Variable gain low noise amplifier based on attenuator |
| CN115833765A (en) * | 2023-02-21 | 2023-03-21 | 成都川美新技术股份有限公司 | Adjustable gain amplifier equipment |
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Application publication date: 20120314 |