CN104253591A - Automatic gain control method applicable to large input dynamic range - Google Patents
Automatic gain control method applicable to large input dynamic range Download PDFInfo
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- CN104253591A CN104253591A CN201310264448.XA CN201310264448A CN104253591A CN 104253591 A CN104253591 A CN 104253591A CN 201310264448 A CN201310264448 A CN 201310264448A CN 104253591 A CN104253591 A CN 104253591A
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Abstract
The invention relates to an automatic gain control method applicable to a large input dynamic range. The method includes that an automatic gain control device receives an input radio frequency signal; the automatic gain control device judges strength changes of the input signal; the automatic gain control device respectively controls switching of a link gain state and a PGA (programmable gain amplifier) gain value according to an judgment result, in other words, when the input signal is changed from weak to strong, if the gain of a PGA is smaller than GL, the link gain state is switched from A1 to A2 or from A2 to A3, and the PGA gain value is switched to GH; when the input signal is changed from strong to weak, if the gain of the PGA is larger than GH, the link gain state is switched from A3 to A2 or from A2 to A1, and the PGA gain value is switched to GL. The automatic gain control device is arranged in an entire receiving link, reasonable switching of the link gain state and the PGA gain value is controlled, the dynamic range of a signal receiving circuit is enlarged, self-excitation of the PGA is avoided effectively, and stability of the receiving link is improved.
Description
Technical field
The present invention relates to a kind of gain control method of receiving circuit, particularly relate to the automatic controlling method for gain being applicable to large input dynamic range.
Background technology
In communication system, signal, when transmitting, due to the impact of various factors, can change from the signal power of external reception, show as the decay of signal.Cause the multipath fading of signal due to the non-linear of transmission channel, simultaneous transmission of signals is also subject to the interference of various noise, and this is by times strong and at other times weak for the signal making receiver receive.The excursion of input signal is often very large, can be a microvolt or tens microvolts when signal is weak, hundreds of millivolt can be reached when signal is strong, peak signal and most weak signal difference can reach tens decibels, in order to receive small-signal as far as possible reliably, usually automatic gain control circuit is provided with on the receiver, its objective is that the gain enabling receiver adjusts automatically with the power of input signal, the major function of automatic growth control is when input signal amplitude changes greatly, amplitude output signal is made to keep constant or change in specific scope, it can ensure when receiving small-signal, the gain of receiver is high, and when receiving strong signal, the gain of receiver is low, thus ensure the performance of whole system.
In receiving circuit, existing mode carries out gain control at last PGA circuit (programmable gain amplifier device circuit), but, when the signal of Larger Dynamic will be processed, then necessarily require the dynamic range of PGA very large, the gain of PGA may be caused so too high, and then make PGA occur self-excitation problem.
For another example patent No. CN102857246A, the auto gain control method of permanent envelope receiver and device, adopt the limiting amplifier of current gain value, the intensity instruction of the input signal strength according to low noise amplifier and the Received signal strength from limiting amplifier, adjustment low noise amplifier, the yield value of radio-frequency (RF) mixer or programmable gain amplifier, until input signal strength does not occur saturated, and the instruction of the intensity of Received signal strength does not reach the maximum that limiting amplifier can indicate, and during the minimum value that can not indicate lower than limiting amplifier, complete automatic growth control.In automatic gain control process, although without the need to adjusting digitally controlled variable gain inner ring, improve the speed of automatic growth control, the dynamic range of programmable gain amplifier must be very large, the gain of programmable gain amplifier may be caused too high, and then make PGA occur self-excitation problem.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of automatic controlling method for gain being applicable to large input dynamic range, it can increase the dynamic range of signal receiving circuit, can effectively avoid programmable gain amplifier to occur self-excitation problem.
The object of the invention is to be achieved through the following technical solutions: the automatic controlling method for gain being applicable to large input dynamic range, it comprises the steps:
S01: the automatic gain control apparatus be arranged in receiver receives the radiofrequency signal of input;
S02: described automatic gain control apparatus judges the strong and weak situation of change of the radiofrequency signal received;
S03: described automatic gain control apparatus distinguishes the switching of control link gain-state and programmable gain amplifier yield value according to judged result, and it comprises following two kinds of situations:
(1) when the radiofrequency signal inputted changes from small to large, if the gain of programmable gain amplifier is less than G
l, then link gain states is switched to A2 or A2 from A1 and is switched to A3, meanwhile, the yield value of programmable gain amplifier is switched to G
h;
(2) when the radiofrequency signal inputted changes from big to small, if the gain of programmable gain amplifier is greater than G
h, then link gain states is switched to A2 or A2 from A3 and is switched to A1, meanwhile, the yield value of programmable gain amplifier is switched to G
l.
Wherein, G
lfor the gain floor of programmable gain amplifier, G
hfor the upper gain limit of programmable gain amplifier, A1, A2, A3 are link gain states, and A1 > A2 > A3.
When the described radiofrequency signal when inputting changes from small to large, link gain states is switched to A2 from A1, and meets:
A1·G
L＜A2·G
H。
When the described radiofrequency signal when inputting changes from small to large, link gain states is switched to A3 from A2, and meets:
A2·G
L＜A3·G
H。
When the described radiofrequency signal when inputting changes from big to small, link gain states is switched to A2 from A3, and meets:
A2·G
L＜A3·G
H。
When the described radiofrequency signal when inputting changes from big to small, link gain states is switched to A1 from A2, and meets:
A1·G
L＜A2·G
H。
Further, described link gain states A1, A2, A3 do not comprise the gain-state of programmable gain amplifier.
Further, described G
hvalue minimum input signal will be made when link gain states is A1 state, its signal export meet the demands, described G
lvalue maximum input signal will be made when link gain states is A3 state, its signal export meet the demands.
The invention has the beneficial effects as follows: automatic gain control apparatus is arranged in whole receiver, the reasonable switching of control link gain-state and programmable gain amplifier yield value, the dynamic range of signal receiving circuit can not only be increased, can also ensure when processing the signal of Larger Dynamic, effectively avoid programmable gain amplifier to occur self-excitation problem, improve the stability of receiver.
Accompanying drawing explanation
Fig. 1 is control flow chart of the present invention;
Fig. 2 is schematic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail, but protection scope of the present invention is not limited to the following stated.
As shown in Figure 1, be applicable to the automatic controlling method for gain of large input dynamic range, it comprises the steps:
S01: the automatic gain control apparatus be arranged in receiver receives the radiofrequency signal of input;
S02: described automatic gain control apparatus judges the strong and weak situation of change of the radiofrequency signal received;
S03: described automatic gain control apparatus distinguishes the switching of control link gain-state and programmable gain amplifier (PGA) yield value according to judged result.If the gain of PGA is more than G
l~ G
hscope, then the gain of receiver switches between A1 ~ A3, and as shown in Figure 2, it comprises following two kinds of situations:
(1) when the radiofrequency signal inputted changes from small to large, if the gain of programmable gain amplifier is less than G
l, then link gain states is switched to A2 or A2 from A1 and is switched to A3, meanwhile, the yield value of programmable gain amplifier is switched to G
h;
(2) when the radiofrequency signal inputted changes from big to small, if the gain of programmable gain amplifier is greater than G
h, then link gain states is switched to A2 or A2 from A3 and is switched to A1, meanwhile, the yield value of programmable gain amplifier is switched to G
l.
Wherein, link gain states A1, A2, A3 do not comprise the gain-state of programmable gain amplifier, and A1 > A2 > A3.The gain of programmable gain amplifier is fixed on G
l~ G
hbetween, wherein, G
lfor the gain floor of programmable gain amplifier, G
hfor the upper gain limit of programmable gain amplifier, i.e. G
h>G
l.G
hvalue minimum input signal will be made when link gain states is A1 state, its signal export meet the demands, G
lvalue maximum input signal will be made when link gain states is A3 state, its signal export meet the demands.
When the described radiofrequency signal when inputting changes from small to large, link gain states is switched to A2 from A1, and meets:
A1·G
L＜A2·G
H。
When the described radiofrequency signal when inputting changes from small to large, link gain states is switched to A3 from A2, and meets:
A2·G
L＜A3·G
H。
Only have the gain reduction of PGA like this when A2 state, output just can be made to meet the demands, if contrary, then the gain of PGA can raise, and link gain switches again, and link will be made unstable.
When the described radiofrequency signal when inputting changes from big to small, link gain states is switched to A2 from A3, and meets:
A2·G
L＜A3·G
H。
When the described radiofrequency signal when inputting changes from big to small, link gain states is switched to A1 from A2, and meets:
A1·G
L＜A2·G
H。
Only have when A2 state the gain of PGA to raise like this, output just can be made to meet the demands, if contrary, then the gain of PGA can reduce, and link gain switches again, and link will be made unstable.
Claims (3)
1. be applicable to the automatic controlling method for gain of large input dynamic range, it is characterized in that: it comprises the steps:
S01: the automatic gain control apparatus be arranged in receiver receives the radiofrequency signal of input;
S02: described automatic gain control apparatus judges the strong and weak situation of change of the radiofrequency signal received;
S03: described automatic gain control apparatus distinguishes the switching of control link gain-state and programmable gain amplifier yield value according to judged result, and it comprises following two kinds of situations:
(1) when the radiofrequency signal inputted changes from small to large, if the gain of programmable gain amplifier is less than G
l, then link gain states is switched to A2 or A2 from A1 and is switched to A3, meanwhile, the yield value of programmable gain amplifier is switched to G
h;
(2) when the radiofrequency signal inputted changes from big to small, if the gain of programmable gain amplifier is greater than G
h, then link gain states is switched to A2 or A2 from A3 and is switched to A1, meanwhile, the yield value of programmable gain amplifier is switched to G
l;
Wherein, G
lfor the gain floor of programmable gain amplifier, G
hfor the upper gain limit of programmable gain amplifier, A1, A2, A3 are link gain states, and A1 > A2 > A3;
When the described radiofrequency signal when inputting changes from small to large, link gain states is switched to A2 from A1, and meets:
A1·G
L＜A2·G
H；
When the described radiofrequency signal when inputting changes from small to large, link gain states is switched to A3 from A2, and meets:
A2·G
L＜A3·G
H；
When the described radiofrequency signal when inputting changes from big to small, link gain states is switched to A2 from A3, and meets:
A2·G
L＜A3·G
H；
When the described radiofrequency signal when inputting changes from big to small, link gain states is switched to A1 from A2, and meets:
A1·G
L＜A2·G
H。
2. the automatic controlling method for gain being applicable to large input dynamic range according to claim 1, is characterized in that: described link gain states A1, A2, A3 do not comprise the gain-state of programmable gain amplifier.
3. the automatic controlling method for gain being applicable to large input dynamic range according to claim 1, is characterized in that: described G
hvalue minimum input signal will be made when link gain states is A1 state, its signal export meet the demands, described G
lvalue maximum input signal will be made when link gain states is A3 state, its signal export meet the demands.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310264448.XA CN104253591B (en) | 2013-06-28 | 2013-06-28 | Suitable for the automatic controlling method for gain of big input dynamic range |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310264448.XA CN104253591B (en) | 2013-06-28 | 2013-06-28 | Suitable for the automatic controlling method for gain of big input dynamic range |
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| Publication Number | Publication Date |
|---|---|
| CN104253591A true CN104253591A (en) | 2014-12-31 |
| CN104253591B CN104253591B (en) | 2017-10-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107276604A (en) * | 2016-03-31 | 2017-10-20 | 恩智浦有限公司 | For handling radio frequency（RF）The method and system of signal |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1335734A (en) * | 2000-07-14 | 2002-02-13 | 日本电气株式会社 | Gain control amplified circuit and terminal equipment with the same gain control amplified circuit |
| CN1810023A (en) * | 2003-06-20 | 2006-07-26 | 皇家飞利浦电子股份有限公司 | Receiver for receiving radio frequency signals |
| CN101222209A (en) * | 2007-01-02 | 2008-07-16 | 晨星半导体股份有限公司 | Dynamic bandwidth compensating method and associated apparatus |
| CN101510786A (en) * | 2008-02-14 | 2009-08-19 | 慧国(上海)软件科技有限公司 | Receiver with low power consumption |
| CN102362429A (en) * | 2009-03-23 | 2012-02-22 | 高通股份有限公司 | Amplifier supporting multiple gain modes |
| WO2012150420A1 (en) * | 2011-05-05 | 2012-11-08 | Commissariat à l'énergie atomique et aux énergies alternatives | Amplification circuit and reception chain |
-
2013
- 2013-06-28 CN CN201310264448.XA patent/CN104253591B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1335734A (en) * | 2000-07-14 | 2002-02-13 | 日本电气株式会社 | Gain control amplified circuit and terminal equipment with the same gain control amplified circuit |
| CN1810023A (en) * | 2003-06-20 | 2006-07-26 | 皇家飞利浦电子股份有限公司 | Receiver for receiving radio frequency signals |
| CN101222209A (en) * | 2007-01-02 | 2008-07-16 | 晨星半导体股份有限公司 | Dynamic bandwidth compensating method and associated apparatus |
| CN101510786A (en) * | 2008-02-14 | 2009-08-19 | 慧国(上海)软件科技有限公司 | Receiver with low power consumption |
| CN102362429A (en) * | 2009-03-23 | 2012-02-22 | 高通股份有限公司 | Amplifier supporting multiple gain modes |
| WO2012150420A1 (en) * | 2011-05-05 | 2012-11-08 | Commissariat à l'énergie atomique et aux énergies alternatives | Amplification circuit and reception chain |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107276604A (en) * | 2016-03-31 | 2017-10-20 | 恩智浦有限公司 | For handling radio frequency（RF）The method and system of signal |
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| CN104253591B (en) | 2017-10-17 |
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Address after: No. 1 high tech Zone Gaopeng road in Chengdu city of Sichuan Province in 610041 Applicant after: CHENGDU CORPRO TECHNOLOGY CO., LTD. Address before: No. 1 high tech Zone Gaopeng road in Chengdu city of Sichuan Province in 610041 Applicant before: Chengdu ARTEC Electronics Corp. |
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