CN104660188A - Control method of envelop tracking technology, control device of envelop tracking technology and electronic equipment - Google Patents
Control method of envelop tracking technology, control device of envelop tracking technology and electronic equipment Download PDFInfo
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Abstract
The application provides a control method of an envelop tracking technology, a control device of the envelop tracking technology and electronic equipment. According to the obtained current working frequency band and working temperature of the electronic equipment, a proportional configuration parameter is determined; then according to the proportional configuration parameter and a current output voltage of switching power of the electronic equipment, a proportion control voltage is determined; then, base on the proportion control voltage, an output impedance of a power amplifier of the electronic equipment is dynamically regulated, and an appropriate voltage-controlled matching network is determined, so that the steady operation of the power amplifier is ensured.
Description
Technical field
The present invention relates generally to the envelop following technology field in electronic equipment, more particularly relates to a kind of control method of envelop following technology, device and electronic equipment.
Background technology
Nowadays, in order to save the power consumption of the electronic equipment such as mobile phone, notebook, envelop following technology is widely used in electronic equipment.In actual applications, need the change of the radiofrequency signal envelope of the output voltage real-time tracking transceiver transmit of the Switching Power Supply of electronic equipment, in this process, in order to avoid envelope signal distortion, usually require that the bandwidth of the output voltage signal of Switching Power Supply is 3 ~ 5 times of radiofrequency signal bandwidth.To this, in prior art normally by the volume controlled of the output decoupling capacitor of Switching Power Supply in 100pF magnitude, to ensure that the harmonic wave of the envelope signal of switch power source output voltage is not by filtering, envelope signal can not distortion.
But, applicant finds, because power amplifier is powered by Switching Power Supply, thus, when switching voltage output voltage Rapid Variable Design or power amplifier load impedance variation or temperature change, all will affect the stability of power amplifier, thus cause the reflector in transceiver cannot reliably working.
Summary of the invention
In view of this, the invention provides a kind of control method of envelop following technology, Apparatus and system, achieve the steady operation of power amplifier, thus ensure that the reliability of the reflector work in transceiver.
To achieve these goals, this application provides following technical scheme:
A control method for envelop following technology, is applied to electronic equipment, and described method comprises:
According to work at present frequency range and the current operating temperature determination proportional arrangement parameter of obtained described electronic equipment;
According to the Switching Power Supply of described proportional arrangement parameter and the described electronic equipment current output voltage determination proportional control voltage based on envelope signal;
The output impedance of the power amplifier of electronic equipment according to described proportional control Voltage Cortrol.
Preferably, described determine proportional control voltage after, before the output impedance of the power amplifier of the described electronic equipment of described adjustment, described method also comprises:
Low-pass filtering is carried out to described proportional control voltage.
Preferably, described method also comprises:
Detect the current operation mode of described electronic equipment;
When described current operation mode is row mode on fdd mode or TDD, obtain work at present frequency range and the current operating temperature of described electronic equipment.
Preferably, the described work at present frequency range according to obtained described electronic equipment and working temperature determination proportional arrangement parameter are specially:
Based on the working frequency range of the electronic equipment prestored and the proportional arrangement relation table electronic equipment of working temperature and proportional arrangement parameter, determine and described work at present frequency range and described current operating temperature proportional arrangement parameter one to one.
Preferably, the described Switching Power Supply according to described proportional arrangement parameter and described electronic equipment comprises based on the current output voltage determination proportional control voltage of envelope signal:
Within the preset configuration time, according to described proportional arrangement parameter, described electronic equipment is configured;
Switching Power Supply according to described electronic equipment determines based on the current output voltage of envelope signal the proportional control voltage that the electronic equipment after configuring exports.
Preferably, described within the preset configuration time, according to described proportional arrangement parameter described electronic equipment is configured and comprises:
Whether detect current time is between the transient period before the subframe of described electronic equipment starts;
If so, according to described proportional arrangement parameter, described electronic equipment is configured;
If not, wait for that next subframe starts, and between transient period before described next subframe starts, according to described proportional arrangement parameter, described electronic equipment is configured.
A control device for envelop following technology, is applied to electronic equipment, and described device comprises:
First determining unit, for according to the work at present frequency range of obtained described electronic equipment and current operating temperature determination proportional arrangement parameter;
Second determining unit, for according to the Switching Power Supply of described proportional arrangement parameter and the described electronic equipment current output voltage determination proportional control voltage based on envelope signal;
Adjustment unit, for the output impedance of the power amplifier of electronic equipment according to described proportional control Voltage Cortrol.
Preferably, described device also comprises:
Low-pass filter unit, for carrying out low-pass filtering to described proportional control voltage.
Preferably, described device also comprises:
First detecting unit, for detecting the current operation mode of described electronic equipment;
Acquiring unit, during for when described current operation mode being row mode on fdd mode or TDD, obtains work at present frequency range and the current operating temperature of described electronic equipment.
Preferably, described first determining unit, specifically for based on the working frequency range of the electronic equipment prestored and the proportional arrangement relation table of working temperature and proportional arrangement parameter, is determined and described work at present frequency range and described current operating temperature proportional arrangement parameter one to one.
Preferably, the second determining unit comprises:
Dispensing unit, within the preset configuration time, is configured described electronic equipment according to described proportional arrangement parameter;
3rd determining unit, determines based on the current output voltage of envelope signal the proportional control voltage that the electronic equipment after configuring exports for the Switching Power Supply according to described electronic equipment.
Preferably, described dispensing unit comprises:
Whether the second detecting unit is between the transient period before the subframe of described electronic equipment starts for detecting current time;
Configuration subelement, for when the testing result of described second detecting unit is for being, is configured described electronic equipment according to described proportional arrangement parameter;
Etc. subelement to be configured, for when the testing result of described second detecting unit is no, wait for that next subframe starts, and between transient period before described next subframe starts, according to described proportional arrangement parameter, described electronic equipment is configured.
A kind of electronic equipment, comprise processor, Switching Power Supply, transceiver, power amplifier and voltage-controlled matching network, described processor is used for according to the work at present frequency range of obtained described electronic equipment and current operating temperature determination proportional arrangement parameter, described electronic equipment also comprises: scale amplifying unit, wherein:
The power end of described power amplifier is connected with described switched power output, and input is connected with described transceiver, and output is connected with voltage-controlled matching network;
The input of described scale amplifying unit is connected with described switched power output with described processor respectively, output is connected with described voltage-controlled matching network, current output voltage for the proportional arrangement parameter determined according to described processor and described Switching Power Supply determines the proportional control voltage exported, to make voltage-controlled matching network described in described proportional control voltage control, adjust the output impedance of described power amplifier.
Preferably, described electronic equipment also comprises:
Low pass filter, is connected with described voltage-controlled matching network by described low pass filter to make the output of described scale amplifying unit.
Preferably, described electronic equipment also comprises:
Be connected with described processor, obtain the temperature-detecting device of the current operating temperature of described electronic equipment.
Preferably, described scale amplifying unit comprises:
Amplifier;
The first resistance be connected with described amplifier positive input;
First end is connected with described amplifier inverting input, the second resistance of the second end ground connection;
One end is connected with the first end of described second resistance, the feedback proportional circuit that the other end is connected with the output of described amplifier;
Wherein, described feedback proportional circuit comprises multiple feedback proportional branch roads in parallel, and feedback proportional branch road described in each includes the 3rd resistance and first switch of series connection.
As can be seen here, compared with prior art, this application provides a kind of control method of envelop following technology, device and electronic equipment, after the work at present frequency range of obtained electronic equipment and working temperature determination proportional arrangement parameter, according to the current output voltage determination proportional control voltage of the Switching Power Supply of this proportional arrangement parameter and this electronic equipment, afterwards, based on the output impedance of the power amplifier of this proportional control voltage dynamic conditioning electronic equipment, determine suitable voltage-controlled matching network, thus the work of guaranteed output amp.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
Fig. 1 is the schematic flow sheet of the control method embodiment of a kind of envelop following technology of the present invention;
Fig. 2 is the schematic flow sheet of the control method embodiment of the another kind of envelop following technology of the present invention;
Fig. 3 is the structural representation of the control device embodiment of a kind of envelop following technology of the present invention;
Fig. 4 is the structural representation of a kind of electronic equipment embodiment of the present invention;
Fig. 5 is the part circuit structure schematic diagram in a kind of electronic equipment embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
This application provides a kind of control method of envelop following technology, device and electronic equipment, after the work at present frequency range of obtained electronic equipment and working temperature determination proportional arrangement parameter, according to the current output voltage determination proportional control voltage of the Switching Power Supply of this proportional arrangement parameter and this electronic equipment, afterwards, based on the output impedance of the power amplifier of this proportional control voltage dynamic conditioning electronic equipment, determine suitable voltage-controlled matching network, thus the work of guaranteed output amp.
With reference to the schematic flow sheet of the control method embodiment of a kind of envelop following technology of the present invention shown in Fig. 1, this control method can be applicable to electronic equipment, and as mobile phone, computer etc., then the control method that the present embodiment provides specifically can comprise the following steps:
Step S110: according to work at present frequency range and the current operating temperature determination proportional arrangement parameter of obtained electronic equipment.
In electronic equipment practical application, what it mainly realized is two-way communication, specifically can adopt Frequency Division Duplexing (FDD) (Frequency Division Duplexing according to actual needs, FDD) pattern or time division duplex (TimeDivision Duplexing, TDD) pattern communicate.
Wherein, FDD adopts two independent channels to carry out transmitting and upwards transmitting the technology of information respectively downwards, namely a channel is used for transmitting information from base station to terminal use, one other channel is used for sending information from terminal use to base station, TDD then utilizes the different time-gap of same frequency channels to realize the transmitting and receiving of signal, and this transmits and to be separated by the certain guarantee time with Received signal strength.
Based on the feature of above-mentioned FDD and TDD two kinds of different working modes, in the present embodiment practical application, before execution step S110, can the current operation mode of first detected electrons equipment, when it is in TDD downlink mode and Received signal strength pattern, the configuration parameter of the power amplifier to its inside is not needed to adjust, and when this electronic equipment is in row mode on fdd mode or TDD, in order to improve the stability of this electronic equipment internal power amplifier operation, need the configuration parameter of this power amplifier of dynamic adjustments or select suitable matching network, thus, in actual applications, can the work at present frequency range of Real-time Obtaining electronic equipment and working temperature, to obtain corresponding proportional arrangement parameter accordingly.
Optionally, the present embodiment adjusts voltage-controlled matching network by Set scale amplifying unit, and the proportional arrangement parameter described in above-described embodiment is used for being configured this scale amplifying unit, to obtain required adjustment parameter.Wherein, this proportional arrangement parameter is determined by test of many times, namely after the working frequency range (low-frequency range or high band) determining electronic equipment and working temperature (low temperature or different high temperature values), by the proportional arrangement parameter of repeatedly resize ratio amplifying unit, determine that electronic equipment makes the most suitable proportional arrangement parameter of power amplifier steady operation under work at present frequency range and current operating temperature, repetition test like this can obtain electronic equipment under different operating frequency range and different operating temperature, improve the corresponding proportional arrangement parameter of power amplifier job stability, afterwards, can according to the corresponding relation of the working frequency range of determined electronic equipment and working temperature and suitable proportional arrangement parameter, set up proportional arrangement relation table and be prestored to processor, based on this, in actual applications, as long as determine work at present frequency range and the current operating temperature of electronic equipment, can table look-up and obtain corresponding proportional arrangement parameter, very convenient and fast.
Certainly; it should be noted that; deterministic process about electronic equipment proportional arrangement parameter of comparative example control unit under different operating frequency and working temperature is not limited to epimere and records lookup table mode; can also based on the device parameters of this electronic equipment and need of work; existing computing formula is utilized to calculate proportional arrangement parameter of scale amplifying unit needs etc.; pay so long as not those skilled in the art that creative work determines, all belong to scope.
Step S120: according to the Switching Power Supply of this proportional arrangement parameter and the electronic equipment current output voltage determination proportional control voltage based on envelope signal.
In actual applications, the processor of electronic equipment is delivered to the output voltage that Switching Power Supply envelope signal will affect this Switching Power Supply, the i.e. output voltage of this Switching Power Supply direct ratio change by the change with the envelope signal received, now, operating voltage due to power amplifier is provided by this Switching Power Supply, thus, when switch power source output voltage constantly changes, the instability of this power amplifier work will inevitably be caused.
Based on this, more stably work to make the power amplifier in electronic equipment, after obtaining corresponding proportional arrangement parameter, can within the preset configuration time, according to this proportional arrangement parameter, electronic equipment is configured, mainly proportional arrangement is carried out to the scale amplifying unit in this electronic equipment, afterwards, electronic equipment after configuration can determine the proportional control voltage of output according to the current output voltage of its Switching Power Supply, thus adjust voltage-controlled matching network, strengthen the stability of power amplification unit work
Wherein, about setup time and the above-mentioned preset configuration time of proportional arrangement parameter, preferably, this layoutprocedure can complete in the transient period before each subframe starts, certainly, be not limited thereto, as long as can realize the proportional arrangement of the scale amplifying unit of electronic equipment and not affect the normal of this electronic equipment using.
Step S130: the output impedance of the power amplifier of electronic equipment according to described proportional control Voltage Cortrol.
Known based on above-mentioned analysis, the embodiment of the present invention passes through work at present frequency range and the working temperature of Real-time Obtaining electronic equipment, and after determining corresponding proportional arrangement parameter accordingly, according to the current output voltage determination proportional control voltage of the Switching Power Supply of this proportional arrangement parameter and this electronic equipment, now, based on the output impedance matching networks of the power amplifier of this this electronic equipment of proportional control voltage dynamic conditioning, thus the stability of power amplifier work can be strengthened.
In order to be illustrated more clearly in the detailed process of the control method of envelop following technology provided by the invention, with reference to the schematic flow sheet shown in Fig. 2, which propose a kind of preferred embodiment of control method of envelop following technology, it should be noted that, embodiment shown in Fig. 2 is the preferred implementation of one of the control method of the envelop following technology that the present invention proposes, but be not limited to this kind of specific implementation, those skilled in the art can on above-mentioned basis embodiment illustrated in fig. 1, determine the specific implementation of above-mentioned steps S110 ~ step S120 according to actual needs, pay so long as not those skilled in the art that creative work determines, all belong to scope, the application will not enumerate at this.Then the concrete steps of the preferred embodiment can be as follows:
Step S210: the current operation mode of detected electrons equipment.
Wherein, the current operation mode of electronic equipment can be fdd mode and tdd mode, and this tdd mode can be divided into again row mode and TDD downlink mode on TDD, according to the description of above-described embodiment corresponding part, when electronic equipment is in TDD downlink mode, namely, when this electronic equipment is just receiving the data of base station transmission, the power amplifier working stability of electronic equipment, is not needing to carry out dynamic conditioning to power amplifier.
Step S220: when this current operation mode be row mode on fdd mode or TDD time, obtain work at present frequency range and the current operating temperature of electronic equipment.
In the present embodiment, when electronic device works row mode on fdd mode or TDD, capital affects the stability of its power amplifier work, thus, need to carry out dynamic conditioning to its output impedance matching networks, namely dynamic conditioning is realized according to the work at present frequency range of electronic equipment and current operating temperature, thus, in the present embodiment practical application, once determine electronic device works row mode on fdd mode or TDD, work at present frequency range and the current operating temperature of electronic equipment will be obtained immediately, use for subsequent step.
Optionally, as another embodiment of the present invention, no matter this electronic equipment works under which kind of mode of operation, can the work at present frequency range of this electronic equipment of Real-time Obtaining and current operating temperature, when determining this electronic device works at TDD downlink mode, follow-up without the need to carrying out any operation; And when determining this electronic device works on fdd mode or TDD during row mode, then the work at present frequency range of electronic equipment obtained according to current time and current operating temperature, carry out subsequent operation.Thus, the present invention does not limit the acquisition work at present frequency range of electronic equipment and the time of current operating temperature.
Step S230: based on the working frequency range of the electronic equipment prestored and the proportional arrangement relation table of working temperature and proportional arrangement parameter, determines current working frequency range and current operating temperature proportional arrangement parameter one to one with this.
The present embodiment by repetition test determination electronic device works when different operating frequency range and working temperature, for the proportional arrangement parameter needed for the stability of enhancing power amplifier work, and set up the working frequency range of electronic equipment and the corresponding relation of working temperature and proportional arrangement parameter, so, in actual applications, when needing the output impedance matching networks of Modulating Power amplifier, can the work at present frequency range of the first electronics obtained and current operating temperature be substituted in above-mentioned corresponding relation, thus find out proportional arrangement parameter one to one, very simple and fast.
Step S240: whether be between the transient period subframe of electronic equipment start before, if so, perform step S260 if detecting current time; If not, step S250 is entered.
Step S250: wait for that next subframe starts.
In the present embodiment, when between the transient period before arriving next subframe and starting, subsequent step S260 is performed.
It should be noted that, for the proportional arrangement of electronic equipment, being not limited between the transient period before its each subframe starts and carrying out, also can be complete in the time.
Step S260: electronic equipment is configured according to proportional arrangement parameter.
Concrete, according to gained proportional arrangement parameter, parameter configuration is carried out to the proportional network in scale amplifying unit in electronic equipment and amplifier, to obtain suitable proportional control voltage, to adjust voltage-controlled matching network.
Step S270: determine the proportional control voltage that the electronic equipment after configuring exports according to the current output voltage of its Switching Power Supply.
Wherein, the output voltage of the Switching Power Supply of electronic equipment is that the envelope signal received based on it is determined.
Step S280: low-pass filtering is carried out to this proportional control voltage.
Step S290: according to the output impedance of the power amplifier of filtered proportional control Voltage Cortrol electronic equipment.
As can be seen here, in the embodiment of the present application, when determining electronic device works on fdd mode or TDD during row mode, the proportional arrangement parameter corresponding with it is searched based on the work at present frequency range of Real-time Obtaining and current operating temperature, and the parameter of proportional network and amplifier in the scale amplifying unit in this electronic equipment is adjusted in time according to this proportional arrangement parameter, thus adjust its proportional control voltage exported, voltage-controlled matching network is delivered to after low-pass filtering, reach dynamic conditioning power amplifier output impedance matching networks, strengthen the object of this power amplifier job stability.
With reference to the structural representation of the control device embodiment of a kind of envelop following technology of the present invention shown in Fig. 3, this control device can be applicable to electronic equipment, and as mobile phone or notebook etc., then the control device that the present embodiment provides specifically can comprise:
First determining unit 310, for according to the work at present frequency range of obtained described electronic equipment and current operating temperature determination proportional arrangement parameter.
Optionally, in the practical application of the present embodiment, the control device of envelop following technology can also comprise:
First detecting unit, for the current operation mode of detected electrons equipment.
Wherein, the current operation mode of electronic equipment comprises tdd mode and fdd mode, and this tdd mode and fdd mode specifically can be subdivided into row mode and downlink mode, it should be noted that, according to communication feature, on this FDD, row mode and FDD downlink mode realize transfer of data by different independent channels, and the upper row mode of TDD and TDD downlink mode are then realize transfer of data by same frequency channels.
Acquiring unit, when being row mode on fdd mode or TDD for this current operation mode, obtains work at present frequency range and the current operating temperature of described electronic equipment.
In the present embodiment, if this current operation mode is TDD downlink mode, namely when electronic equipment receives the data of base station transmission, do not need to carry out dynamic conditioning to power amplifier, now can lead to the work at present frequency range and current operating temperature that obtain electronic equipment, also work at present frequency range and the current operating temperature of this electronic equipment can be obtained, when not needing to carry out subsequent operation accordingly.
Optionally, in the present embodiment practical application, this first determining unit 310 specifically based on the proportional arrangement relation table of the working frequency range of the electronic equipment prestored and working temperature and proportional arrangement parameter, can be determined and the work at present frequency range of this electronic equipment and current operating temperature proportional arrangement parameter one to one.
Second determining unit 320, for according to the Switching Power Supply of described proportional arrangement parameter and the described electronic equipment current output voltage determination proportional control voltage based on envelope signal.
Wherein, in the present embodiment, this second determining unit 320 can comprise:
Dispensing unit 321, within the preset configuration time, is configured described electronic equipment according to described proportional arrangement parameter.
In actual applications, this dispensing unit 321 specifically can comprise:
Whether the second detecting unit is between the transient period before the subframe of electronic equipment starts for detecting current time.
Configuration subelement, for when the testing result of the second detecting unit is for being, is configured electronic equipment according to proportional arrangement parameter;
Etc. subelement to be configured, for when the testing result of the second detecting unit is no, wait for that next subframe starts, and between transient period before next subframe starts, according to this proportional arrangement parameter, electronic equipment is configured.
3rd determining unit 322, determines based on the current output voltage of envelope signal the proportional control voltage that the electronic equipment after configuring exports for the Switching Power Supply according to described electronic equipment.
Optionally, after determining the proportional control voltage that electronic equipment exports, in order to improve control accuracy, this control device can also comprise: low-pass filter unit, for carrying out low-pass filtering to this proportional control voltage.
Adjustment unit 330, for the output impedance of the power amplifier of electronic equipment according to described proportional control Voltage Cortrol.
In sum, the embodiment of the present invention determines corresponding proportional arrangement parameter by the first determining unit according to the work at present frequency range of obtained electronic equipment and current operating temperature, and determine according to the output voltage of this proportional arrangement parameter and Switching Power Supply the proportional control voltage that this electronic equipment exports by the second determining unit, afterwards, by adjustment unit according to this proportional control Voltage Cortrol power amplifier output impedance matching networks, thus strengthen the stability of this power amplifier work.
With reference to the structural representation of a kind of electronic equipment embodiment of the present invention shown in Fig. 4, this electronic equipment is specifically as follows mobile phone, computer etc., the electronic equipment that the present embodiment provides specifically can comprise: processor 410, Switching Power Supply 420, transceiver 430, power amplifier 440, voltage-controlled matching network 450 and scale amplifying unit 460, wherein:
Processor 410 is for determining the proportional arrangement parameter of this scale amplifying unit 460 according to the work at present frequency range of obtained electronic equipment and current operating temperature.
Concrete, according to the description of above-described embodiment appropriate section, the working frequency range of electronic equipment that test can be obtained and the corresponding relation of working temperature and proportional arrangement parameter are prestored in the processor 410 of this electronic equipment, thus, in actual applications, after the work at present frequency range learning this electronic equipment when processor 410 and current operating temperature, this corresponding relation can be directly utilized to select corresponding proportional arrangement parameter, afterwards, within the setup time of presetting, this proportional arrangement parameter can be sent to scale amplifying unit 460, complete the configuration to this proportional arrangement unit 460.
Switching Power Supply 420 is connected with processor 410, receives the envelope signal that this processor 410 sends, and controls the output voltage of self according to this envelope signal.Wherein, this envelope signal specifically can by DAC (the Digital to analog converter in this processor 410, digital to analog converter) be delivered to Switching Power Supply 420, now, because the output of this Switching Power Supply 420 is connected with the power end of power amplifier 440 with scale amplifying unit 460 respectively, thus, the operating voltage of this power amplifier 440 and scale amplifying unit 460 provides by this Switching Power Supply 420.
Transceiver 430 control end is connected with processor 410, and output is connected with power amplifier 440, and in the present embodiment practical application, processor 410 controls this transceiver 430 and sends radiofrequency signal to this power amplifier 440.Wherein, in order to avoid envelope signal distortion, the output voltage waveforms bandwidth of General Requirements Switching Power Supply 420 is 3 ~ 5 times of radiofrequency signal bandwidth, this supply line just requiring Switching Power Supply 420 to be added to the power end of power amplifier 440 can not use the capacitor decoupling of higher value, but in the prior art, the decoupling capacitor of Switching Power Supply must in 100pF magnitude, can ensure that the harmonic wave of the envelope signal of the output voltage of Switching Power Supply 420 is not by filtering, envelope signal is undistorted.
Applicant finds after deliberation, power amplifier 440 need the Capacitance parallel connection of μ F+nF+pF rank come decoupling and and keep this self working stability of power amplifier 440, but, the circuit structure of existing electronic equipment only allows the electric capacity using 100pF magnitude, obviously, this cannot the stability of guaranteed output amplifier operation; And the antenna band due to electronic equipment switches and will cause power amplifier load to change and variation of ambient temperature, thus makes power amplifier instability, and then makes its penalty, even can cause the reflector in transceiver 430 cannot reliably working.
In order to solve the problem, the embodiment of the present invention connects a scale amplifying unit 460 while Switching Power Supply 420 exports as power amplifier 440 power supply, namely the output of Switching Power Supply 420 connects the power end of power amplifier 440 and the power end of scale amplifying unit 460 simultaneously, by this scale amplifying unit 460 according to antenna band (i.e. the working frequency range of above-mentioned electronic equipment) and working temperature, select corresponding proportional arrangement parameter, control the voltage-controlled matching network be connected with this scale amplifying unit 460 output, the output impedance of dynamic conditioning power amplifier 440, strengthen the stability of this power amplifier 440 when operating voltage (i.e. the output voltage of Switching Power Supply 420) Rapid Variable Design.
Optionally, in order to improve control precision further, this electronic equipment can also comprise low pass filter 470, to make scale amplifying unit 460 be connected with voltage-controlled matching network 450 by this low pass filter 470, carries out low-pass filtering to the proportional control voltage that this scale amplifying unit 460 exports.
In addition, in the present embodiment practical application, in order to obtain the current operating temperature of electronic equipment, the temperature-detecting device 480 be connected with processor 410 can also be set in this electronic equipment.Wherein, this temperature-detecting device 480 is specifically as follows temperature sensor etc., but is not limited thereto.
Optionally, state in each embodiment on the invention, as shown in Figure 5, aforementioned proportion amplifying unit 460 specifically can comprise: amplifier OP1, the the first resistance R1 be connected with this amplifier OP1 positive input, first end is connected with this amplifier OP1 reverse input end, the second resistance R2 of the second end ground connection, one end is connected with the first end of described second resistance R2, the feedback proportional circuit 461 that the other end is connected with the output of described amplifier OP1.
Wherein, described feedback proportional circuit 461 comprises multiple feedback proportional branch roads 4611 in parallel, and feedback proportional branch road 4611 described in each includes the 3rd resistance R3 and first K switch 1 of series connection, as shown in Figure 5, this feedback proportional circuit 461 specifically can comprise three feedback proportional branch roads 4611 in parallel, but is not limited thereto, in actual applications, can adjust according to actual needs, the present invention illustrates no longer one by one at this.
In addition, it should be noted that, particular circuit configurations for the scale amplifying unit 460 in the various embodiments described above of the present invention be not limited to Fig. 5 to circuit structure, those skilled in the art can select other scaling circuit existing according to actual needs, and the present invention will not enumerate at this.
As another embodiment of the present invention, electronic equipment in the various embodiments described above can also comprise suggestion device, for when determining that the output voltage of Switching Power Supply changes greatly, export information, to inform the power amplifier job insecurity of user's now electronic equipment.
Wherein, this suggestion device is specifically as follows buzzer, indicator light or voice module etc., and the present invention does not do concrete restriction to this, and that pays that creative work determines so long as not those skilled in the art all belongs to scope.
In sum, in the practical application of the electronic equipment provided at the present embodiment, by work at present frequency range and the current operating temperature of this electronic book equipment of processor Real-time Obtaining, and after finding working frequency range current with this and proportional arrangement parameter corresponding to current operating temperature, this proportional arrangement parameter is sent to scale amplifying unit, complete the configuration to this scale amplifying unit, the voltage-controlled matching network of proportional control voltage control exported by the scale amplifying unit after configuring, Modulating Power amplifier output impedance, thus strengthen this power amplifier Switching Power Supply output voltage Rapid Variable Design namely its operating voltage Rapid Variable Design time stability.
It should be noted that, about in the various embodiments described above, the such as relational terms of first, second grade and so on is only used for an operation or unit and another operates or cellular zone separates, and not necessarily requires or imply the relation or order that there is any this reality between these unit or operation.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.For device disclosed in embodiment and electronic equipment, because it is corresponding with method disclosed in embodiment, so description is fairly simple, relevant part illustrates see method part.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (16)
1. a control method for envelop following technology, is applied to electronic equipment, it is characterized in that, described method comprises:
According to work at present frequency range and the current operating temperature determination proportional arrangement parameter of obtained described electronic equipment;
According to the Switching Power Supply of described proportional arrangement parameter and the described electronic equipment current output voltage determination proportional control voltage based on envelope signal;
The output impedance of the power amplifier of electronic equipment according to described proportional control Voltage Cortrol.
2. method according to claim 1, is characterized in that, described determine proportional control voltage after, before the output impedance of the power amplifier of the described electronic equipment of described adjustment, described method also comprises:
Low-pass filtering is carried out to described proportional control voltage.
3. method according to claim 1, is characterized in that, described method also comprises:
Detect the current operation mode of described electronic equipment;
When described current operation mode is row mode on fdd mode or TDD, obtain work at present frequency range and the current operating temperature of described electronic equipment.
4. method according to claim 1, is characterized in that, the described work at present frequency range according to obtained described electronic equipment and working temperature determination proportional arrangement parameter are specially:
Based on the working frequency range of the electronic equipment prestored and the proportional arrangement relation table electronic equipment of working temperature and proportional arrangement parameter, determine and described work at present frequency range and described current operating temperature proportional arrangement parameter one to one.
5. method according to claim 1, is characterized in that, the described Switching Power Supply according to described proportional arrangement parameter and described electronic equipment comprises based on the current output voltage determination proportional control voltage of envelope signal:
Within the preset configuration time, according to described proportional arrangement parameter, described electronic equipment is configured;
Switching Power Supply according to described electronic equipment determines based on the current output voltage of envelope signal the proportional control voltage that the electronic equipment after configuring exports.
6. method according to claim 5, is characterized in that, described within the preset configuration time, to be configured to comprise according to described proportional arrangement parameter to described electronic equipment:
Whether detect current time is between the transient period before the subframe of described electronic equipment starts;
If so, according to described proportional arrangement parameter, described electronic equipment is configured;
If not, wait for that next subframe starts, and between transient period before described next subframe starts, according to described proportional arrangement parameter, described electronic equipment is configured.
7. a control device for envelop following technology, is applied to electronic equipment, it is characterized in that, described device comprises:
First determining unit, for according to the work at present frequency range of obtained described electronic equipment and current operating temperature determination proportional arrangement parameter;
Second determining unit, for according to the Switching Power Supply of described proportional arrangement parameter and the described electronic equipment current output voltage determination proportional control voltage based on envelope signal;
Adjustment unit, for the output impedance of the power amplifier of electronic equipment according to described proportional control Voltage Cortrol.
8. device according to claim 7, is characterized in that, described device also comprises:
Low-pass filter unit, for carrying out low-pass filtering to described proportional control voltage.
9. device according to claim 7, is characterized in that, described device also comprises:
First detecting unit, for detecting the current operation mode of described electronic equipment;
Acquiring unit, during for when described current operation mode being row mode on fdd mode or TDD, obtains work at present frequency range and the current operating temperature of described electronic equipment.
10. device according to claim 7, it is characterized in that, described first determining unit, specifically for based on the working frequency range of the electronic equipment prestored and the proportional arrangement relation table of working temperature and proportional arrangement parameter, is determined and described work at present frequency range and described current operating temperature proportional arrangement parameter one to one.
11. devices according to claim 7, is characterized in that, the second determining unit comprises:
Dispensing unit, within the preset configuration time, is configured described electronic equipment according to described proportional arrangement parameter;
3rd determining unit, determines based on the current output voltage of envelope signal the proportional control voltage that the electronic equipment after configuring exports for the Switching Power Supply according to described electronic equipment.
12. devices according to claim 11, is characterized in that, described dispensing unit comprises:
Whether the second detecting unit is between the transient period before the subframe of described electronic equipment starts for detecting current time;
Configuration subelement, for when the testing result of described second detecting unit is for being, is configured described electronic equipment according to described proportional arrangement parameter;
Etc. subelement to be configured, for when the testing result of described second detecting unit is no, wait for that next subframe starts, and between transient period before described next subframe starts, according to described proportional arrangement parameter, described electronic equipment is configured.
13. 1 kinds of electronic equipments, comprise processor, Switching Power Supply, transceiver, power amplifier and voltage-controlled matching network, it is characterized in that, described processor is used for according to the work at present frequency range of obtained described electronic equipment and current operating temperature determination proportional arrangement parameter, described electronic equipment also comprises: scale amplifying unit, wherein:
The power end of described power amplifier is connected with described switched power output, and input is connected with described transceiver, and output is connected with voltage-controlled matching network;
The input of described scale amplifying unit is connected with described switched power output with described processor respectively, output is connected with described voltage-controlled matching network, current output voltage for the proportional arrangement parameter determined according to described processor and described Switching Power Supply determines the proportional control voltage exported, to make voltage-controlled matching network described in described proportional control voltage control, adjust the output impedance of described power amplifier.
14. electronic equipments according to claim 13, is characterized in that, described electronic equipment also comprises:
Low pass filter, is connected with described voltage-controlled matching network by described low pass filter to make the output of described scale amplifying unit.
15. electronic equipments according to claim 13, is characterized in that, described electronic equipment also comprises:
Be connected with described processor, obtain the temperature-detecting device of the current operating temperature of described electronic equipment.
16. electronic equipments according to any one of claim 13-15, it is characterized in that, described scale amplifying unit comprises:
Amplifier;
The first resistance be connected with described amplifier positive input;
First end is connected with described amplifier inverting input, the second resistance of the second end ground connection;
One end is connected with the first end of described second resistance, the feedback proportional circuit that the other end is connected with the output of described amplifier;
Wherein, described feedback proportional circuit comprises multiple feedback proportional branch roads in parallel, and feedback proportional branch road described in each includes the 3rd resistance and first switch of series connection.
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| CN104660188B (en) | 2017-12-26 |
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