CN101556480A - Power control device used for mobile communication terminal - Google Patents
Power control device used for mobile communication terminal Download PDFInfo
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- CN101556480A CN101556480A CNA2009100845505A CN200910084550A CN101556480A CN 101556480 A CN101556480 A CN 101556480A CN A2009100845505 A CNA2009100845505 A CN A2009100845505A CN 200910084550 A CN200910084550 A CN 200910084550A CN 101556480 A CN101556480 A CN 101556480A
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Abstract
The invention provides a power control device used for a mobile communication terminal, comprising a power amplifying unit, a matching unit, a feedback unit and a control unit; wherein the power amplifying unit is used for amplifying input radio frequency signals; the matching unit is used for adjusting the load of the mobile communication mobile so as to lead the mobile communication mobile to be matched with the amplified radio frequency signals and obtain the output power of the mobile communication mobile; the feedback unit is used for feeding back the output power to the control unit; and the control unit is used for controlling radio frequency signals output by the power amplifying unit according to the fed back output power. The power control device overcomes the problems that in the prior art, the corresponding output power is set by induction values of voltage or current and as the power is not detected directly, the accuracy of the power output control is lower.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of output control device that is used for mobile communication terminal.
Background technology
In wireless communication system, the output power of transmitter there is the requirement of strictness.For example, for the cell mobile communication systems that adopts GSM (Global System for Mobile Communications) standard, the emissive power of transfer table has been divided into several grades, differs 2dBm between every adjacent rank.Mobile communication system can be adjusted output power automatically according to they residing varying environments, so that keep the optimal communication state with the base station.For example, far away apart from the base station when transfer table, shelter is many, when causing signal intensity attenuation big, needs transmitter to improve emissive power; And nearer apart from the base station when transfer table, signal intensity attenuation is little, emissive power that can less transmitter.This power adjustment for raising the efficiency, extends the life of a cell, and also is very important.This has just proposed certain requirement to the output power control of transmitter.
Correlation technique provides a kind of and has controlled transmitter the method for emissive power according to voltage induced or induction by current feedback system, and this method obtains output power in the load by measuring the voltage that is associated with output power or electric current.This method is that the biasing of hold amplifier is constant, by adjusting the collector voltage of amplifier, changes the output power of amplifier.
In realizing process of the present invention, the inventor finds to set corresponding output power by the influence value of voltage or electric current in the prior art, owing to be not direct detection power, lower to the degree of accuracy of power output control.
Summary of the invention
The present invention aims to provide a kind of output control device that is used for mobile communication terminal, can solve in the prior art and set corresponding output power by the influence value of voltage or electric current, owing to be not direct detection power, to the lower problem of degree of accuracy of power output control.
In an embodiment of the present invention, provide a kind of output control device that is used for mobile communication terminal, having comprised: power amplification unit, matching unit, feedback unit and control module, wherein
Power amplification unit is used for the radiofrequency signal of input is amplified;
Matching unit is used to adjust the load of mobile communication terminal, and itself and the radiofrequency signal of amplifying are complementary, and obtains the output power of mobile communication terminal;
Feedback unit is used for output power is fed back to control module;
Control module is used for according to the output power of feedback the radiofrequency signal of power amplification unit output being controlled.
Preferably, above-mentioned power amplification unit comprises that peak power output is the power amplifier of 35dBm.
Preferably, above-mentioned power amplification unit comprises that peak power output is the power amplifier of 32dBm.
Preferably, above-mentioned matching unit comprises first inductance (L1) and first capacitor (C1) and second capacitor (C2), wherein, one end of first capacitor (C1) and second capacitor (C2) is connected with the two ends of first inductance (L1) respectively, and the other end of first capacitor (C1) and described second capacitor (C2) is ground connection respectively.
Preferably, above-mentioned feedback unit comprises second inductance (L2) and first resistance (R1), and wherein, an end of second inductance (L2) connects the radio-frequency power output of mobile communication terminal, and its other end is connected with an end of first resistance (R1); The other end of first resistance (R2) is connected with control module.
Preferably, control module comprises: rectifier, logarithmic amplifier and second resistance, and wherein, the input end of rectifier is connected with the output terminal of feedback unit; Logarithmic amplifier is connected between the end of the output terminal of rectifier and second resistance; The other end ground connection of second resistance.
Preferably, rectifier is all-wave linear rectifier or all-wave square rectifier.
Preferably, logarithmic amplifier specifically comprises: n limiting amplifier and n+1 voltage-current converter, wherein, n limiting amplifier series coupled together, the input end of first limiting amplifier is connected with the output terminal of rectifier; The input end of first voltage-current converter is connected with the output terminal of rectifier, all the other n voltage-current converter is connected with the output terminal of n limiting amplifier respectively, and the output terminal of n+1 voltage-current converter is coupled and is connected with an end of second resistance; N is the integer more than or equal to 2.
The foregoing description is by being provided with feedback unit and control module, the output power of portable terminal is fed back, thereby the output to power amplification unit is controlled, because adopting the method for directly measuring power controls the output power of mobile communication terminal, improved control accuracy to the mobile communication terminal output power, overcome and set corresponding output power by the influence value of voltage or electric current in the prior art, owing to be not direct detection power, to the lower problem of degree of accuracy of power output control.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 shows the output control device synoptic diagram that is used for mobile communication terminal according to an embodiment of the invention;
Fig. 2 shows according to one embodiment of the invention matching unit structural representation;
Fig. 3 shows according to one embodiment of the invention feedback unit structural representation;
Fig. 4 shows control unit module synoptic diagram in accordance with a preferred embodiment of the present invention;
Fig. 5 shows the output control device module map that is used for mobile communication terminal in accordance with a preferred embodiment of the present invention.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
Fig. 1 shows the output control device synoptic diagram that is used for mobile communication terminal according to an embodiment of the invention, comprising: power amplification unit 10, matching unit 20, feedback unit 30 and control module 40, wherein
Present embodiment is by being provided with feedback unit and control module, the output power of portable terminal is fed back, thereby the output to power amplification unit is controlled, because adopting the method for directly measuring power controls the output power of mobile communication terminal, improved control accuracy to the mobile communication terminal output power, overcome and set corresponding output power by the influence value of voltage or electric current in the prior art, owing to be not direct detection power, to the lower problem of degree of accuracy of power output control.
Preferably, above-mentioned power amplification unit comprises that peak power output is the power amplifier of 35dBm, is used for the power output of the mobile communication terminal of corresponding GSM (Global System Mobile Communications, global system for mobile communications) frequency range.
Preferably, above-mentioned power amplification unit comprises that power bracket is that peak power output is the power amplifier of 32dBm, is used for the power output of the mobile communication terminal of corresponding DCS (Distributed Control System, Distributed Control System (DCS)) frequency range.
Fig. 2 shows according to one embodiment of the invention matching unit structural representation, as shown in Figure 2, matching unit comprises first inductance (L1), first capacitor (C1) and second capacitor (C2), wherein, one end of first capacitor (C1) and second capacitor (C2) is connected with the two ends of first inductance (L1) respectively, and the other end of first capacitor (C1) and described second capacitor (C2) is ground connection respectively.In the present embodiment, matching unit is used to provide the impedance matching between power amplification and the load, so that obtain maximum output power in load.According to different use frequency ranges, the components and parts in the match circuit need be chosen corresponding value, so that obtain best effect.For example, in the application of corresponding GSM frequency range, the value of the components and parts that first inductance (L1), first capacitor (C1) and second capacitor (C2) are selected for use is respectively 1.0nH, 20pF and 4.7pF; In the application of corresponding DCS frequency range, the value of the components and parts that first inductance (L1), first capacitor (C1) and second capacitor (C2) are selected for use is respectively 1.2nH, 8.2pF and 3.3pF.
Fig. 3 shows according to one embodiment of the invention feedback unit structural representation, as shown in Figure 3, feedback unit comprises second inductance (L2) and first resistance (R1), wherein, one end of second inductance (L2) connects the radio-frequency power output of mobile communication terminal, and its other end is connected with an end of first resistance (R1); The other end of first resistance (R2) is connected with control module.In the present embodiment, feedback unit feeds back to control module with the sub-fraction of output power, and control module can obtain the size of output power by this part power that detection feeds back, and then output power is adjusted accordingly.If output power is higher, then reduces the gain of power amplifier, thereby reduce output power; Otherwise, if output power is on the low side, the gain that then increases power amplifier, thus increase output power.
Preferably, control module comprises: rectifier, logarithmic amplifier and second resistance, and wherein, the input end of rectifier is connected with the output terminal of feedback unit; Logarithmic amplifier is connected between the end of the output terminal of rectifier and second resistance; The other end ground connection of second resistance.In the present embodiment, the radiofrequency signal of control module by the feedback unit coupling is come is converted to direct current signal by rectifier, and amplifies through logarithmic amplifier; By resistance, be converted to voltage signal at output terminal, the gain of the further control power amplifiers of this voltage signal again.
Preferably, rectifier is all-wave linear rectifier or all-wave square rectifier, and linear or square rectifier obtains a d. c. voltage signal by an all-wave, this voltage signal is proportional to the amplitude of the envelope of radiofrequency signal, or be proportional to envelope amplitude square.
Preferably, logarithmic amplifier specifically comprises: n limiting amplifier and n+1 voltage-current converter, wherein, n limiting amplifier series coupled together, the input end of first limiting amplifier is connected with the output terminal of rectifier; The input end of first voltage-current converter is connected with the output terminal of rectifier, all the other n voltage-current converter is connected with the output terminal of n limiting amplifier respectively, and the output terminal of n+1 voltage-current converter is coupled and is connected with an end of second resistance; N is the integer more than or equal to 2.In the present embodiment, the radiofrequency signal of control module by the feedback unit coupling is come is converted to direct current signal by rectifier, and the limiting amplifier of a series of series coupled of process, and amplification step by step adds up; The input end of voltage-current converter also is coupled in the output of each grade amplifier, converts current signal to, after all current signal additions, by resistance, is converted to voltage signal at output terminal, the gain of the further control power amplifiers of this voltage signal.
Fig. 4 shows control unit module synoptic diagram in accordance with a preferred embodiment of the present invention, and as shown in Figure 4, control module is converted to the signal of control power amplifiers voltage by the radiofrequency signal of coming that feedback unit is coupled.Radiofrequency signal by feedback unit coupling obtains at first by rectifier REC, obtains a d. c. voltage signal, and this voltage signal is through a series of limiting amplifier A then, is accumulated step by step and amplifies.At the output terminal of each limiting amplifier A, part output signal converts current signal to by a voltage-current converter VTCC; All current signals are addition together at last, obtains final output current, and by resistance R, is converted to voltage signal at output terminal, the gain of the further control power amplifiers of this voltage signal, thus reach the purpose that complete power is controlled.
Fig. 5 shows the output control device module map that is used for mobile communication terminal in accordance with a preferred embodiment of the present invention, as shown in Figure 5, first power amplifier and second power amplifier be the application of corresponding different frequency section respectively, for example distinguish corresponding GSM and DCS frequency range, present embodiment has been realized in a device power output control to the mobile communication terminal of different frequency range.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the memory storage and carry out by calculation element, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. an output control device that is used for mobile communication terminal is characterized in that, comprising:
Power amplification unit, matching unit, feedback unit and control module, wherein
Described power amplification unit is used for the radiofrequency signal of input is amplified;
Described matching unit is used to adjust the load of described mobile communication terminal, and the radiofrequency signal of itself and described amplification is complementary, and obtains the output power of described mobile communication terminal;
Described feedback unit is used for described output power is fed back to described control module;
Described control module is used for according to the output power of described feedback the radiofrequency signal of described power amplification unit output being controlled.
2. output control device according to claim 1 is characterized in that, described power amplification unit comprises that peak power output is the power amplifier of 35dBm.
3. output control device according to claim 1 is characterized in that, described power amplification unit comprises that peak power output is the power amplifier of 32dBm.
4. output control device according to claim 1 is characterized in that, described matching unit comprises first inductance (L1) and first capacitor (C1) and second capacitor (C2), wherein
One end of described first capacitor (C1) and described second capacitor (C2) is connected with the two ends of described first inductance (L1) respectively, and the other end of described first capacitor (C1) and described second capacitor (C2) is ground connection respectively.
5. output control device according to claim 1 is characterized in that, described feedback unit comprises second inductance (L2) and first resistance (R1), wherein
One end of described second inductance (L2) connects the radio-frequency power output of described mobile communication terminal, and its other end is connected with an end of described first resistance (R1);
The other end of described first resistance (R2) is connected with described control module.
6. output control device according to claim 5 is characterized in that, described control module comprises: rectifier, logarithmic amplifier and second resistance, wherein
The input end of described rectifier is connected with the output terminal of described feedback unit;
Described logarithmic amplifier is connected between the end of the output terminal of described rectifier and described second resistance;
The other end ground connection of described second resistance.
7. output control device according to claim 6 is characterized in that, described rectifier is all-wave linear rectifier or all-wave square rectifier.
8. output control device according to claim 6 is characterized in that, described logarithmic amplifier specifically comprises: n limiting amplifier and n+1 voltage-current converter, wherein
Described n limiting amplifier series coupled together, the input end of first described limiting amplifier is connected with the output terminal of described rectifier;
The input end of first described voltage-current converter is connected with the output terminal of described rectifier, all the other n described voltage-current converters are connected with the output terminal of a described n limiting amplifier respectively, and the output terminal of a described n+1 voltage-current converter is coupled and is connected with an end of described second resistance;
Described n is the integer more than or equal to 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100845505A CN101556480A (en) | 2009-05-21 | 2009-05-21 | Power control device used for mobile communication terminal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100845505A CN101556480A (en) | 2009-05-21 | 2009-05-21 | Power control device used for mobile communication terminal |
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| CN101556480A true CN101556480A (en) | 2009-10-14 |
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| CNA2009100845505A Pending CN101556480A (en) | 2009-05-21 | 2009-05-21 | Power control device used for mobile communication terminal |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102332873A (en) * | 2011-07-15 | 2012-01-25 | 唯捷创芯(天津)电子技术有限公司 | Power control circuit for mobile terminal power amplifier |
| CN103716870A (en) * | 2013-12-31 | 2014-04-09 | 北京朗波芯微技术有限公司 | Power control device for mobile communication terminal |
-
2009
- 2009-05-21 CN CNA2009100845505A patent/CN101556480A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102332873A (en) * | 2011-07-15 | 2012-01-25 | 唯捷创芯(天津)电子技术有限公司 | Power control circuit for mobile terminal power amplifier |
| CN103716870A (en) * | 2013-12-31 | 2014-04-09 | 北京朗波芯微技术有限公司 | Power control device for mobile communication terminal |
| CN103716870B (en) * | 2013-12-31 | 2018-02-06 | 北京朗波芯微技术有限公司 | Output control device for mobile communication terminal |
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Application publication date: 20091014 |