CN101677228B - Power amplifier system, control method and control device thereof - Google Patents
Power amplifier system, control method and control device thereof Download PDFInfo
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- CN101677228B CN101677228B CN2008101608019A CN200810160801A CN101677228B CN 101677228 B CN101677228 B CN 101677228B CN 2008101608019 A CN2008101608019 A CN 2008101608019A CN 200810160801 A CN200810160801 A CN 200810160801A CN 101677228 B CN101677228 B CN 101677228B
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Abstract
The invention provides a power amplifier system, a control method and a control device thereof. The control device of a power amplifier leads the power amplifier system to be operated in a non-linear switching mode according to the size of a wave packet of the input signals; and when the power amplifier is operated in the non-linear switching mode, the control device provides the supply voltage and the power amplifier input signals to the power amplifier corresponding to input signals according to the characteristics obtained by the pre-measurement power amplifier, to ensure that the power amplifier has high power-added efficiency (PAE) and better degree of linearity.
Description
Technical field
The present invention relates to a kind of power amplifier, particularly relate to and raising the efficiency and the power amplifier of the linearity.
Background technology
(Power Amplifier PA) in radio circuit, has played the part of considerable role to power amplifier.At the transmitting terminal (Transmitter) of radio circuit, just be to use power amplifier to amplify the signal of desire emission.The radiofrequency characteristics of power amplifier comprises power output and linearity of output signal, and is very big to the performance of entire system influence.
Traditional linear power amplifier is biased in active member fixedly under the direct current as category-A, category-B and class ab ammplifier, thus have the preferable linearity, but make efficient not good because have full-time direct current power consumption.And when input power was too big, power output again can't be amplified linearly, caused its gain to descend distorted signals.Must reduce the signal averaging power output to keep the linearity this moment, is called power and refunds compensation (Back-off), and the result will cause power amplifier can't operate in high efficient area, and average efficiency reduces.
Non-linear switching power amplifier, as D class, E class and F class A amplifier A, efficient can reach 100% in theory, but its linearity is not good, so that can not be used in the linear modulation system.But under the high speed trend of wireless telecommunication system, the requirement of the signal linearity is generally promoted.Therefore, even non-linear switching power amplifier is good than linear power amplifier on efficient, but can not be applied to separately because the linearity is not good in the high linear modulation system, other element of must arranging in pairs or groups is integrated into amplifier system can practicability.
A kind of power amplifier that supplies a pattern and switch that for example in patent cases such as U.S. Patent Publication No. US6043707, U.S. Patent Publication No. US6987417 and U.S. Patent Publication No. US7043213, is disclosed respectively, mainly be to use different operator schemes, to promote the system effectiveness and the linearity in different power region.Yet these power amplifier systems are compared to the conventional linear power amplifier, in improved efficiency under the low power output limited.
Summary of the invention
The invention provides a kind of control device and control method that is applied to power amplifier system, earlier input signal is done preliminary treatment, with the efficient that improves amplifier and keep high linearity.
The invention provides a kind of control device of power amplifier, comprise that mode selection module, parameter provide module, waveform adjusting module, supply voltage generation module and bias voltage generation module.Mode selection module is exported a mode signal in order to receive an input signal according to the ripple bag size and the magnitude relationship of a critical value of input signal.Parameter provides module in order to a service voltage parameter and a power amplifier input power parameter to be provided.The waveform adjusting module is coupled to mode selection module and parameter provides module, and receiving inputted signal, and export the input of a power amplifier input signal to power amplifier, when mode signal is one first pattern, the waveform adjusting module provides module to obtain power amplifier input power parameter according to the ripple bag size autoregressive parameter of input signal, again according to power amplifier input power parameter and input signal output power amplifier input signal.The supply voltage generation module is coupled to mode selection module and parameter provides module, and export the power end of a service voltage to power amplifier, when mode signal is first pattern, provide module to obtain the service voltage parameter according to the big or small autoregressive parameter of the ripple bag of input signal, to set service voltage.The bias voltage generation module is coupled to mode selection module, and exports the bias terminal that an amplifier is biased into power amplifier, and when mode signal was first pattern, setting the amplifier bias voltage according to mode signal was one first predetermined bias value.
The present invention also provides a kind of power amplifier system, comprises power amplifier and the control device that the invention described above provided.Wherein the power amplifier input signal of the waveform adjusting module of control device output is in order to the driving power amplifier.The power end of power amplifier is according to the output signal operation of supply voltage generation module.The bias terminal of power amplifier is operated according to the output signal of bias voltage generation module.
The present invention also provides a kind of control method of power amplifier, and this control method comprises the following steps.One of step provides module for a parameter is provided, so that a service voltage parameter and a power amplifier input power parameter to be provided.One input signal is provided.Another of step is the ripple bag size of judgement input signal and the size of a critical value.When the ripple bag size of input signal during greater than a critical value: the ripple bag size autoregressive parameter according to input signal provides module to obtain power amplifier input power parameter, and obtaining a power amplifier input signal to calculate according to power amplifier input power parameter and input signal, the output power amplifier input signal is to the input of power amplifier then; Ripple bag size autoregressive parameter according to input signal provides module to obtain the service voltage parameter, and exports the power end of a service voltage to power amplifier according to the service voltage parameter; And to set an amplifier bias voltage be one first predetermined bias value, and export the bias terminal that an amplifier is biased into power amplifier.
In sum, a kind of control device and control method that is applied to power amplifier system provided by the present invention, its pre-characteristic that measures power amplifier, measurement is converted to optimized power amplifier bias voltage parameter and input power amplifier input power parameter, and be stored in parameter module is provided, so when using power amplifier, can try to achieve suitable service voltage and power amplifier input signal according to input signal, so that power amplifier system has high efficiency and high linearity.
For above-mentioned feature and advantage of the present invention can be become apparent, embodiment cited below particularly, and be described with reference to the accompanying drawings as follows.
Description of drawings
Fig. 1 is the schematic diagram according to the power amplifier system that one embodiment of the invention illustrated.
Fig. 2 is according to power, the service voltage of the power amplifier input signal that one embodiment of the invention illustrated and the three-dimensional relationship schematic diagram for the treatment of the power of output signal.
Fig. 3 is the three-dimensional relationship schematic diagram according to power, service voltage and the power added efficiency of the power amplifier input signal that one embodiment of the invention illustrated.
Fig. 4 is for being the amplifier system block schematic diagram according to another embodiment of the present invention illustrated.
Fig. 5 is for being the amplifier system block schematic diagram according to yet another embodiment of the invention illustrated.
Fig. 6 is for being the amplifier system block schematic diagram according to further embodiment of this invention illustrated.
Fig. 7 shows the control method flow chart of the power amplifier that one embodiment of the invention illustrates.
The reference numeral explanation
100,400,500,600: power amplifier system
110: control device
111: mode selection module
111a: measure the unit
111b: mode selecting unit
112: parameter provides module
113: the supply voltage generation module
114: the bias voltage generation module
115: the waveform adjusting module
120: power amplifier
131～133: digital analog converter
141～142,543,643: drive circuit
150: modulation circuit
301: equipotential line
455: demodulator
460: analog-digital converter
Embodiment
Accompanying drawing is the part incorporating in this specification and constitute this specification, description of drawings some embodiment of the present invention, and with describe content one and be used from explaination principle of the present invention.
For above-mentioned and other purposes of the present invention, feature and advantage can be become apparent, an embodiment cited below particularly, and be described with reference to the accompanying drawings as follows.In the case of any possible, will use same reference numerals to represent same or similar element among all figure.
Fig. 1 is the schematic diagram according to the power amplifier system that one embodiment of the invention illustrated.Please refer to Fig. 1, power amplifier system 100 comprises control device 110, power amplifier 120, drive circuit 141～142 and modulation circuit 150.Wherein, control device 110 is coupled to power amplifier 120 by drive circuit 141～142 and modulation circuit 150.In the present embodiment, control device 110 for example is a digital signal processor, so power amplifier system 100 also can comprise digital analog converter (Digital-to-Analog Converter, DAC) 131～133, make control device 110 before being coupled to drive circuit 141～142 and modulation circuit 150, can be earlier via digital analog converter 131～133 digital signal be changed into analog signal respectively.Wherein, power amplifier 120 for example is E power-like amplifier (Class-E power amplifier).
Wherein, control device 110 comprises that also mode selection module 111, parameter provide module 112, supply voltage generation module 113, bias voltage generation module 114 and waveform adjusting module 115.And mode selection module 111 also comprises the mode selecting unit 111b that measures unit 111a and be coupled to measurement unit 111a.Mode selecting unit 111b is coupled to supply voltage generation module 113, bias voltage generation module 114 and waveform adjusting module 115, and parameter provides module 112 to be coupled to supply voltage generation module 113 and waveform adjusting module 115, and measures unit 111a and waveform adjusting module 115 common receiving inputted signals.
Hold above-mentionedly, measure unit 111a receiving inputted signal, and the ripple bag size of measurement and converted input signal is a voltage amplitude, to export mode selecting unit 111b to.
Then, mode selecting unit 111b can calculate the power for the treatment of output signal of power amplifier system 100 according to the voltage amplitude of measuring.Because treat the power and the proportional relation of voltage amplitude of output signal, event can compare voltage amplitude and the critical value size is come the output mode signal, operate in which kind of pattern with decision power amplifier system 100, so that power amplifier 120 obtains the maximum efficient and the linearity.In other words, the user can comply with its demand, and voltage amplitude or the power for the treatment of output signal as relatively or the foundation of judging, and are obtained identical effect.When voltage amplitude during greater than critical value, mode selecting unit 111b then is judged to be high power output, and mode signal is set at first pattern, and the power of output signal is treated in output.Thus, power amplifier 120 just can maintain the preferable linearity and efficient when amplifying high-power signal.
In addition, the also scalable lower powered signal of power amplifier 120, for example when voltage amplitude during less than critical value, mode selecting unit 111b then is judged to be low-power output, and mode signal is set at second pattern, and the power of output signal is treated in output.When if voltage amplitude equals critical value, the user can look its demand and be judged to be low-power output or high power output, is not limited at this.
If be judged to be high power output, just when voltage amplitude during greater than critical value, mode selecting unit 111b is set at first pattern with mode signal, supply voltage generation module 113 is according to treating that the power autoregressive parameter of output signal provides module 112 to obtain the service voltage parameter, and according to service voltage parameter output service voltage, then be converted to analog signal, after amplifying via drive circuit 141 again, export the power end of this power amplifier 120 to via digital analog converter 131.
And bias voltage generation module 114 setting amplifier bias voltages are the first predetermined bias value, and output amplifier is biased into digital analog converter 132, and digital analog converter 132 is converted to the amplifier bias voltage after the analog form, export drive circuit 142 again to, export the bias terminal of power amplifier 120 after amplifying via drive circuit 142 again to.Thus, just can change the voltage of the bias terminal of power amplifier 120, so that power amplifier 120 operates in non-linear switch mode.The bias terminal of its intermediate power amplifier 120 for example is base stage or grid.
Simultaneously, waveform adjusting module 115 is according to treating that the power autoregressive parameter of output signal provides module 112 to obtain power amplifier input power parameter, and obtain the power amplifier input signal according to power amplifier input power parameter and input signal, then the power amplifier input signal is exported to the input of digital analog converter 133, then be modulated to radiofrequency signal by modulation circuit 150 again, and export the input of power amplifier 120 to.
Hold above-mentioned, if be judged to be low-power output, just when voltage amplitude during less than critical value, mode selecting unit 111b is set at second pattern with mode signal, it is the first predetermined supply value that supply voltage generation module 113 is set service voltage, and be converted to analog signal via digital analog converter 131, after amplifying via drive circuit 141 again, export the power end of this power amplifier 120 to.Wherein, the first predetermined supply value for example is a critical value.
At this moment, it is the second predetermined bias value that bias voltage generation module 114 is set the amplifier bias voltage, and output amplifier is biased into digital analog converter 132, and digital analog converter 132 is converted to the amplifier bias voltage after the analog form, export drive circuit 142 again to, export the bias terminal of power amplifier 120 after amplifying via drive circuit 142 again to.Thus, just can change the voltage of the bias terminal of power amplifier 120, so that power amplifier 120 operates in linear model.
Simultaneously, waveform adjusting module 115 exports the power amplifier input signal to according to the enlargement ratio of power amplifier the input of digital analog converter 133, in other words, adjust the power amplifier input signal, so that the power that the power of power amplifier input signal equals to treat output signal operates in linear gain between linear zone divided by power amplifier 120.Then the power amplifier input signal is exported to digital analog converter 133 and do class position analog-converted, then be modulated to radiofrequency signal by modulation circuit 150 again, and export the input of power amplifier 120 to.
Wherein, parameter provides module 112 to comprise the voltage table of comparisons and the power table of comparisons, and the voltage table of comparisons is given voltage parameter in order to store many written confessions, and the voltage table of comparisons is learnt the service voltage parameter in order to table look-up according to the power for the treatment of output signal; And the power table of comparisons is in order to storing many power amplifier input power parameters, and the power table of comparisons is learnt power amplifier input power parameter in order to table look-up according to the power for the treatment of output signal.In addition, as previously mentioned, the user be when can comply with its demand, replaces the power of the treating output signal foundation as judgement with voltage amplitude.
In addition, in other embodiments, parameter provides module 112 for comprising the first parameters of formula storage element and the second parameters of formula storage element.The first parameters of formula storage element is in order to export the service voltage parameter according to the power for the treatment of output signal; The second parameters of formula storage element is treated the power output power amplifier input power parameter of output signal in order to foundation.Then supply voltage generation module 113 can calculate and export service voltage according to the service voltage parameter, and waveform adjusting module 115 can calculate and obtains the power amplifier input signal according to this power amplifier input power parameter and input signal, exports the input of power amplifier to.In addition, as previously mentioned, the user be when can comply with its demand, replaces the power of the treating output signal foundation as judgement with voltage amplitude.
Provide module 112 for how detailed description obtains parameter, please be simultaneously with reference to Fig. 2 and Fig. 3, Fig. 2 is according to power, the service voltage of the power amplifier input signal that one embodiment of the invention illustrated and the three-dimensional relationship schematic diagram for the treatment of the power of output signal.Fig. 3 is the three-dimensional relationship schematic diagram according to power, service voltage and the power added efficiency of the power amplifier input signal that one embodiment of the invention illustrated.Before using power amplifier 120, can measure under the power of different service voltages and different capacity amplifier input signal 120 the corresponding power for the treatment of output signal and power added efficiencies that produce of power amplifier earlier.In Fig. 2, each bar equipotential line is the identical power for the treatment of output signal, and correspond to the power and the service voltage of different power amplifier input signals, similarly, each bar equipotential line is identical power added efficiency among Fig. 3, and corresponds to the power and the service voltage of different power amplifier input signals.
As previously mentioned, control device 110 is after receiving input signal, mode selecting unit 111b can calculate the power for the treatment of output signal earlier, for power and the service voltage of understanding which group power amplifier input signal can obtain the highest power added efficiency, and then can be according to checking in from Fig. 2 and Fig. 3.For instance, the power for the treatment of output signal that is calculated as mode selecting unit 111b is 24dBm, then finding the power for the treatment of output signal from Fig. 2 is the equipotential line of 24dBm, for convenience of description, Fig. 2 is treated that the power of output signal is that the equipotential line of 24dBm is overlapped in Fig. 3, be the dotted line 301 shown in Fig. 3, so can from Fig. 3, find the power of the power amplifier input signal that corresponds to best power added efficiency and the combination of service voltage along dotted line 301.In other words, after selected cell 111b calculates the power for the treatment of output signal, can find the power amplifier input signal of the power added efficiency that corresponds to the best and the combination of service voltage.
Above-mentioned look into figure result and can be stored in the power table of comparisons and the voltage table of comparisons, directly obtain service voltage parameter or power amplifier input power parameter to provide to table look-up.Perhaps the form with formula is stored in the first parameters of formula storage element and the second parameters of formula storage element, to obtain service voltage parameter or power amplifier input power parameter via calculating.
In addition, for different communication systems are done optimization, control device 110 in the present embodiment is able to programme, can provide service voltage parameter or power amplifier input power parameter in the module to make change to its critical value, predetermined supply bias value and parameter, can be applicable to the adaptation signal treatment technology, by revising critical value behind feedback signal and the input signal comparing difference, its calculation method can adjust at varying environment and system, as shown in Figure 4.Fig. 4 is the amplifier system block schematic diagram according to another embodiment of the present invention illustrated, power amplifier system 400 among Fig. 4 is the power amplifier system 100 in Fig. 1 on function, and the difference of power amplifier system 400 and power amplifier system 100 maximums is, power amplifier system 400 also comprises demodulator 455 and analog-digital converter (Analog-to-Digital Converter, ADC) 460, demodulator 455 can become feedback signal with the output signal demodulation of power amplifier system 400, then convert digital signal to by analog-digital converter 460 again, and pass control device 110 back and process, change critical value in the control device 110 with correspondence, predetermined supply bias value and parameter provide service voltage parameter or the power amplifier input power parameter in the module.
In addition, the present invention also provides another embodiment, please refer to Fig. 5, Fig. 5 is the amplifier system block schematic diagram according to yet another embodiment of the invention illustrated, power amplifier system 500 among Fig. 5 is the power amplifier system 100 in Fig. 1 on function, and the difference of power amplifier system 500 and power amplifier system 100 maximums is, waveform adjusting module 115 can directly be exported radiofrequency signal, therefore can not need modulation circuit 150 to come the modulation power amplifier input signal, come amplifying signal so power amplifier system 500 can change with drive circuit 543.
In addition, the present invention provides another embodiment again, please refer to Fig. 6, Fig. 6 is the amplifier system block schematic diagram according to further embodiment of this invention illustrated, power amplifier system 600 among Fig. 6 is the power amplifier system 400 in Fig. 4 on function, its maximum difference is that waveform adjusting module 115 can directly export radiofrequency signal, therefore can not need modulation circuit 150 to come the modulation power amplifier input signal, come amplifying signal so power amplifier system 600 can change with drive circuit 643.Change speech, power amplifier system 600 has feedback signal simultaneously, and its waveform adjusting module 115 can directly be exported radiofrequency signal.
Based on the content that the foregoing description disclosed, the control method of putting in order out a kind of power amplifier of below will converging is considered and examined to those skilled in the art.Fig. 7 shows the control method flow chart of the power amplifier that one embodiment of the invention illustrates.Please refer to Fig. 7, the control method of the power amplifier of present embodiment comprised the following steps: before using this power amplifier, need pre-earlier power and the power added efficiency (step S770) that measures power amplifier in different power amplifier input signals and the output signal under the service voltage, can push away via pre-measurement: under known output signal power, can know the power and the power added efficiency of the output signal that power and service voltage club at each power amplifier input signal correspond to.Corresponding relation can be set up parameter module (step S780) is provided by this, and parameter provide module can be the table of comparisons or the contrast formula form, so that power amplifier input power parameter and service voltage parameter to be provided.After finishing this preposition operation, just can begin the operand power amplifier
At first, calculate the power (step S710) for the treatment of output signal, it can calculate via the ripple bag size that measures input signal.Whether then judge the power for the treatment of output signal greater than critical value (step S720), by as can be known aforementioned, the user can comply with its demand, replaces the power of the treating output signal foundation as judgement with voltage amplitude.It should be noted that the form in this critical value is a watt level,, need earlier critical value to be converted into the form of voltage swing if replace the power for the treatment of output signal with voltage amplitude.
When the power for the treatment of output signal is less than or equal to critical value, the power end of power amplifier and bias terminal are set at the first predetermined supply value and the second predetermined bias value (step S730) respectively, so that power amplifier operates in linear model.Then, foundation treats that the power of output signal and enlargement ratio come setting power amplifier input signal (step S740) again, and enlargement ratio is the linear gain size of power amplifier.
When the power for the treatment of output signal during, the bias terminal of power amplifier is set at the first predetermined bias value (step S750), power amplifier is set in non-linear switch mode greater than critical value.Then, the service voltage of the power of rated output amplifier input signal and the power end of power amplifier (step S760), it can be provided the power amplifier input power parameter of module and service voltage parameter to calculate by the parameter that the power for the treatment of output signal and step S780 are set up.
At last, come driving power amplifier (step S790), just can make power amplifier obtain high linearity and high efficiency effect according to the power and the service voltage of the power amplifier input signal of above-mentioned steps gained.
In sum, a kind of control device and control method that is applied to power amplifier system provided by the present invention, its pre-characteristic that measures power amplifier, and measurement is stored in parameter module is provided, so when using power amplifier, can try to achieve the power of suitable service voltage and power amplifier input signal according to input signal, so that power amplifier system has high efficiency and advantage of high linearity, and can be applicable in the various wireless telecommunication systems at the different system optimization.
Though the present invention discloses as above with embodiment; right its is not in order to limit the present invention; those skilled in the art can do some changes and retouching under the premise without departing from the spirit and scope of the present invention, so protection scope of the present invention is as the criterion with the application's claim.
Claims (20)
1. the control device of a power amplifier comprises:
One mode selection module in order to receive an input signal, is exported a mode signal according to the ripple bag size and the magnitude relationship of a critical value of this input signal;
One parameter provides module, in order to a service voltage parameter and a power amplifier input power parameter to be provided;
One waveform adjusting module, be coupled to this mode selection module and this parameter provides module, and receive this input signal, and export the input of a power amplifier input signal to this power amplifier, when this mode signal is one first pattern, this waveform adjusting module provides module to obtain this power amplifier input power parameter according to the ripple bag size of this input signal from this parameter, exports this power amplifier input signal according to this power amplifier input power parameter and this input signal again;
One supply voltage generation module, be coupled to this mode selection module and this parameter provides module, and export the power end of a service voltage to this power amplifier, when this mode signal is this first pattern, ripple bag size according to this input signal provides module to obtain this service voltage parameter from this parameter, to set this service voltage; And
One bias voltage generation module is coupled to this mode selection module, and exports the bias terminal that an amplifier is biased into this power amplifier, and when this mode signal was this first pattern, setting this amplifier bias voltage according to this mode signal was one first predetermined bias value.
2. control device as claimed in claim 1, wherein this mode selection module comprises:
One measures the unit, in order to the ripple bag size of measurement input signal, and exports a voltage amplitude; And
One mode selecting unit, in order to the size of this voltage amplitude and this critical value relatively, when this voltage amplitude during greater than this critical value, this mode selecting unit is set this mode signal and is this first pattern.
3. control device as claimed in claim 2, wherein when this voltage amplitude during less than this critical value, setting this mode signal is one second pattern, and this waveform adjusting module is exported this power amplifier input signal according to an enlargement ratio, it is one first predetermined supply value that this supply voltage generation module is set this service voltage, and it is one second predetermined bias value that this bias voltage generation module is set this amplifier bias voltage.
4. control device as claimed in claim 1, wherein this parameter provides module to comprise:
The one voltage table of comparisons is given voltage parameter in order to store many written confessions, and this voltage table of comparisons is learnt this service voltage parameter in order to table look-up according to the ripple bag size of this input signal; And
The one power table of comparisons, in order to store many power amplifier input power parameters, this power table of comparisons is learnt this power amplifier input power parameter in order to table look-up according to the ripple bag size of this input signal.
5. control device as claimed in claim 1, wherein this parameter provides module to comprise:
One first parameters of formula storage element is in order to this service voltage parameter of ripple bag size output according to this input signal; And
One second parameters of formula storage element, in order to this power amplifier input power parameter of ripple bag size output according to this input signal,
Then this waveform adjusting module calculates according to this power amplifier input power parameter and this input signal and obtains this power amplifier input signal, and this supply voltage generation module calculates this service voltage of output according to this service voltage parameter.
6. control device as claimed in claim 3, wherein this first predetermined supply value is this critical value.
7. power amplifier system comprises:
One control device comprises:
One mode selection module in order to receive an input signal, is exported a mode signal according to the ripple bag size and the magnitude relationship of a critical value of this input signal;
One parameter provides module, in order to a service voltage parameter and a power amplifier input power parameter to be provided;
One waveform adjusting module, be coupled to this mode selection module and this parameter provides module, and receive this input signal, and export the input of a power amplifier input signal to this power amplifier, when this mode signal is one first pattern, this waveform adjusting module provides module to obtain this power amplifier input power parameter according to the ripple bag size of this input signal from this parameter, exports this power amplifier input signal according to this power amplifier input power parameter and this input signal again;
One supply voltage generation module, be coupled to this mode selection module and this parameter provides module, and export the power end of a service voltage to this power amplifier, when this mode signal is this first pattern, ripple bag size according to this input signal provides module to obtain this service voltage parameter from this parameter, to set this service voltage; And
One bias voltage generation module is coupled to this mode selection module, and exports the bias terminal that an amplifier is biased into this power amplifier, and when this mode signal was this first pattern, setting this amplifier bias voltage according to this mode signal was one first predetermined bias value; And
One power amplifier, the input of this power amplifier are according to this power amplifier input signal, and the power end of this power amplifier is operated this power amplifier according to the bias terminal of this service voltage and this power amplifier according to this amplifier bias voltage.
8. power amplifier system as claimed in claim 7 also comprises a modulation circuit, and it is coupled between the input and this waveform adjusting module of this power amplifier, in order to modulate the signal that this waveform adjusting module is exported.
9. power amplifier system as claimed in claim 7, wherein this mode selection module comprises:
One measures the unit, in order to the ripple bag size of measurement input signal, and exports a voltage amplitude; And
One mode selecting unit, in order to the size of this voltage amplitude and this critical value relatively, when this voltage amplitude during greater than this critical value, this mode selecting unit is set this mode signal and is this first pattern.
10. power amplifier system as claimed in claim 9, wherein when this voltage amplitude during less than this critical value, setting this mode signal is one second pattern, and this waveform adjusting module is exported this power amplifier input signal according to an enlargement ratio, it is one first predetermined supply value that this supply voltage generation module is set this service voltage, and it is one second predetermined bias value that this bias voltage generation module is set this amplifier bias voltage.
11. power amplifier system as claimed in claim 7, wherein this parameter provides module to comprise:
The one voltage table of comparisons is given voltage parameter in order to store many written confessions, and this voltage table of comparisons is learnt this service voltage parameter in order to table look-up according to the ripple bag size of this input signal; And
The one power table of comparisons, in order to store many power amplifier input power parameters, this power table of comparisons is learnt this power amplifier input power parameter in order to table look-up according to the ripple bag size of this input signal.
12. power amplifier system as claimed in claim 7, wherein this parameter provides module to comprise:
One first parameters of formula storage element is in order to this service voltage parameter of ripple bag size output according to this input signal; And
One second parameters of formula storage element, in order to this power amplifier input power parameter of ripple bag size output according to this input signal,
Then this waveform adjusting module calculates according to this power amplifier input power parameter and this input signal and obtains this power amplifier input signal, and this supply voltage generation module calculates this service voltage of output according to this service voltage parameter.
13. power amplifier system as claimed in claim 7, wherein this control device is a digital system.
14. power amplifier system as claimed in claim 13 also comprises:
One first digital analog converter is coupled between this supply voltage generation module and one first drive circuit;
One second digital analog converter is coupled between this bias voltage generation module and one second drive circuit; And
One the 3rd digital analog converter is coupled between this waveform adjusting module and this modulation circuit.
15. power amplifier system as claimed in claim 10, wherein this first predetermined supply value is this critical value.
16. the control method of a power amplifier, this control method comprises the following steps:
Provide a parameter that module is provided, so that a service voltage parameter and a power amplifier input power parameter to be provided;
Judge the ripple bag size of an input signal and the size of a critical value; And
When the ripple bag size of this input signal during greater than a critical value,
Ripple bag size according to this input signal provides module to obtain this power amplifier input power parameter from this parameter, and obtain a power amplifier input signal to calculate according to this power amplifier input power parameter and this input signal, export the input of this power amplifier input signal then to this power amplifier;
Ripple bag size according to this input signal provides module to obtain this service voltage parameter from this parameter, and exports the power end of a service voltage to this power amplifier according to this service voltage parameter; And
The bias terminal of setting this power amplifier is one first predetermined bias.
17. control method as claimed in claim 16 wherein provides this parameter that module is provided, and comprises with the step that this service voltage parameter and this power amplifier input power parameter are provided:
Measure a plurality of power outputs and a plurality of delivery efficiency of this power amplifier in the ripple bag size that corresponds to various supply voltages and various input signals;
Draw comparison list according to described supply voltage, the ripple bag size of described signal, described power output and described delivery efficiency; And
According to the ripple bag size of this input signal, find out this reference voltage and this reference power certainly in this table of comparisons.
18. control method as claimed in claim 16 wherein provides this parameter that module is provided, and comprises with the step that this service voltage parameter and this power amplifier input power parameter are provided:
Measure power output and the delivery efficiency of this power amplifier in the ripple bag size that corresponds to various supply voltages and various input signals;
Try to achieve a contrast formula according to described supply voltage, the ripple bag size of described signal, described power output and described delivery efficiency; And
According to the ripple bag size of this input signal, calculate this reference voltage and this reference power in this contrast formula certainly.
19. control method as claimed in claim 16 wherein also comprises after the step of the ripple bag size of judging this input signal and the size of this critical value:
When the ripple bag size of this input signal during less than this critical value,
Export the input of this power amplifier input signal according to an enlargement ratio to this power amplifier;
The power end of setting this power amplifier is one first predetermined supply value; And
The bias terminal of setting this power amplifier is one second predetermined bias value.
20. control method as claimed in claim 19, wherein this first predetermined supply value is this critical value.
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| CN2008101608019A CN101677228B (en) | 2008-09-16 | 2008-09-16 | Power amplifier system, control method and control device thereof |
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| CN2008101608019A CN101677228B (en) | 2008-09-16 | 2008-09-16 | Power amplifier system, control method and control device thereof |
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| CN101677228A CN101677228A (en) | 2010-03-24 |
| CN101677228B true CN101677228B (en) | 2011-11-09 |
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| CN2008101608019A Active CN101677228B (en) | 2008-09-16 | 2008-09-16 | Power amplifier system, control method and control device thereof |
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| CN101938258B (en) * | 2010-08-27 | 2013-06-05 | 华为终端有限公司 | Method and device for controlling radio frequency power amplifier to transmit signal |
| JP2016192590A (en) * | 2015-03-30 | 2016-11-10 | 株式会社村田製作所 | Power amplification module |
| TWI572134B (en) * | 2015-05-22 | 2017-02-21 | 絡達科技股份有限公司 | Power control method of amplifier module |
| CN106549717A (en) * | 2015-09-23 | 2017-03-29 | 中兴通讯股份有限公司 | A kind of transmission power detection method and device |
| CN109462809B (en) * | 2018-09-07 | 2021-08-13 | 深圳市万普拉斯科技有限公司 | Detection method and system of power amplifier |
| CN109698674A (en) * | 2018-12-11 | 2019-04-30 | 四川九洲电器集团有限责任公司 | A kind of back-off device and electronic equipment and its control method |
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| CN1568029A (en) * | 2003-06-20 | 2005-01-19 | 华为技术有限公司 | Synchronous error measuring method and apparatus with envelope elimination and digital power amplifier restoration |
| CN1638292A (en) * | 2004-01-08 | 2005-07-13 | 松下电器产业株式会社 | Transmitting device |
| CN1663115A (en) * | 2002-06-25 | 2005-08-31 | 北电网络有限公司 | Improved power amplifier configuration |
| GB2440772A (en) * | 2006-08-08 | 2008-02-13 | Asahi Chemical Micro Syst | A power supply modulator for an RF amplifier |
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