CN110166004A - A kind of power amplifier reduces the method and device of power consumption - Google Patents
A kind of power amplifier reduces the method and device of power consumption Download PDFInfo
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- CN110166004A CN110166004A CN201910313122.9A CN201910313122A CN110166004A CN 110166004 A CN110166004 A CN 110166004A CN 201910313122 A CN201910313122 A CN 201910313122A CN 110166004 A CN110166004 A CN 110166004A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
- H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
- H03F1/0211—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the supply voltage or current
- H03F1/0244—Stepped control
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Abstract
This application discloses a kind of methods that power amplifier reduces power consumption, include the following steps.Step 31: the supply voltage of power amplifier being tracked using mean power, i.e., to each transmission power level of power amplifier using respectively different voltage values.Step 32: bias voltage or bias current to power amplifier use discrete control, several adjacent transmission power levels of power amplifier are used with the bias voltage or bias current value of an identical power amplifier, the quantity of all transmission power levels of power amplifier is greater than all bias voltages of power amplifier or the quantity of bias current value.The step 31, the sequence of step 32 are perhaps exchanged or are carried out simultaneously.The method that above-mentioned power amplifier reduces power consumption not only meets the demand for reducing power consumption, but also is easily achieved, and be able to satisfy every radio-frequency performance index, moreover it is possible to reduce test job amount.
Description
Technical field
This application involves a kind of control methods of power amplifier.
Background technique
In mobile communication system, user equipment (UE, User Equipment) makes battery due to portability to be considered
Capacity is limited.Under the premise of battery capacity is certain, the power consumption for how reducing user equipment becomes an important project.For
For baseband chip in user equipment, power consumption is concentrated mainly on the emitting portion of baseband chip, and emitting portion most power consumption
It is then power amplifier (PA, Power Amplifier).It is no exaggeration to say that once controlling the consumption of power amplifier
Electricity also just controls the power consumption of entire user equipment.
In existing scheme, in order to control the power consumption of power amplifier, power can be adjusted according to different transmission powers
The supply voltage (VCC) of amplifier.Transmission power is bigger, and the supply voltage of power amplifier is higher；Transmission power is smaller, power
The supply voltage of amplifier is smaller；It can achieve the purpose for saving power consumption in this way.
Simultaneously as current power amplifier is substantially MIPI(Mobile Industry Processor
Interface, Mobile Industry Processor Interface) control, this is just to adjust power amplifier according to different transmission powers
Bias voltage (Bias Voltage) or bias current (bias current) provide condition.The manufacturer of power amplifier can mention
The parameter list of bias voltage or bias current for the corresponding power amplifier of a different output power, using in the list
Bias voltage or bias current, power amplifier can work in optimum state, reach the state of most power saving.
Summary of the invention
The technical problem to be solved by the application is to provide a kind of methods that power amplifier reduces power consumption, while subtracting again
Few test job amount.For this purpose, the application also provides a kind of device of power amplifier reduction power consumption.
In order to solve the above technical problems, this application provides a kind of method that power amplifier reduces power consumption, including it is as follows
Step.Step 31: the supply voltage of power amplifier being tracked using mean power, i.e., to each transmitting of power amplifier
Performance number is using respectively different voltage values.Step 32: bias voltage or bias current to power amplifier use from
Control is dissipated, i.e., several adjacent transmission power levels of power amplifier are used with the bias voltage of an identical power amplifier
Or bias current value, the quantity of all transmission power levels of power amplifier are greater than all bias voltages or inclined of power amplifier
Set the quantity of current value.The step 31, the sequence of step 32 are perhaps exchanged or are carried out simultaneously.
The method that above-mentioned power amplifier reduces power consumption not only meets the demand for reducing power consumption, but also is easily achieved, and can be full
Foot items radio-frequency performance index, moreover it is possible to reduce test job amount.
Preferably, in the step 31, the corresponding relationship between the transmission power level and voltage value is in user
What the transmission power calibration stage of equipment obtained.This is a kind of preferred implementation side that mean power tracking is used to supply voltage
Formula.
Preferably, in the step 31, the voltage value of power amplifier is limited to a minimum value and a maximum
Between value.This is to make power amplifier be maintained at linearly interval work as far as possible.
Further, in the step 32, the transmission power level with it is corresponding between bias voltage or bias current value
Relationship obtains in this way: adjacent several transmission power levels of power amplifier being divided into one group, all transmission power levels point
For several groups, the transmission power level in a group corresponds to an identical bias voltage or bias current value jointly, and different groups
Transmission power level then correspond to different bias voltage or bias current value.This be bias voltage or bias current are used from
A kind of preferred implementation for dissipating control, can reduce to a certain extent the power consumption of power amplifier, while survey is greatly decreased
Try workload.
Present invention also provides a kind of power amplifier reduce power consumption device, including power amplifier, power supply unit and
Bias unit.Said supply unit uses mean power tracking mode for power amplifier power supply, i.e., to the every of power amplifier
One transmission power level is using respectively different voltage values.The bias unit uses discrete control mode for power amplification
Device provides bias voltage or bias current, i.e., inclined using identical one to several adjacent transmission power levels of power amplifier
Voltage or bias current value are set, the quantity of all transmission power levels of power amplifier is greater than all biased electricals of power amplifier
The quantity of pressure or bias current value.
The device that above-mentioned power amplifier reduces power consumption not only meets the demand for reducing power consumption, but also is easily achieved, and can be full
Foot items radio-frequency performance index, moreover it is possible to reduce test job amount.
Preferably, the corresponding relationship between transmission power level and voltage value that said supply unit uses is in user
What the transmission power calibration stage of equipment obtained.This is a kind of preferred implementation side that mean power tracking is used to supply voltage
Formula.
Preferably, the voltage value that said supply unit provides is limited between a minimum value and a maximum value.
This is to make power amplifier be maintained at linearly interval work as far as possible.
Preferably, the transmission power level that the bias unit uses is corresponding between bias voltage or bias current value to close
System obtains in this way: adjacent several transmission power levels of power amplifier being divided into one group, all transmission power levels are divided into
Several groups, the transmission power level in a group correspond to an identical bias voltage or bias current value jointly, difference group
Transmission power level then corresponds to different bias voltage or bias current value.This is to bias voltage or bias current using discrete
A kind of preferred implementation of control, can reduce to a certain extent the power consumption of power amplifier, while test is greatly decreased
Workload.
The technical effect that the application obtains is as follows.First, supply voltage is provided using consecutive mean power tracking mode, is made
Different transmission power levels corresponds to the voltage value of lowest power consumption.Second, bias voltage is provided using discrete control mode
(or bias current), reduces the power consumption of power amplifier to a certain extent, while test job amount is greatly decreased.Third, letter
Change realization difficulty, improves realization efficiency, and improve the working efficiency of power amplifier.
Detailed description of the invention
Fig. 1 is the energy dissipation schematic diagram that power amplifier uses fixed voltage to power.
Fig. 2 is energy dissipation schematic diagram of the power amplifier using variable voltage power supply (mean power tracking).
Fig. 3 is the flow diagram of the one embodiment for the method that power amplifier provided by the present application reduces power consumption.
Fig. 4 is the block diagram of the one embodiment for the device that power amplifier provided by the present application reduces power consumption.
Description of symbols in figure: 41 it is power amplifier, 42 is power supply unit, 43 is bias unit.
Specific embodiment
It is exactly according to the power amplification in user equipment that mean power, which tracks (average power tracking, APT),
The different transmission power of device dynamically adjusts the supply voltage of power amplifier.With LTE FDD(Frequency Division
Duplexing, frequency division duplex) for user equipment, minimum sending time unit is 1ms to LTE user equipment under normal circumstances.By
It is controlled in transmission power by base station (BS, Base Station), so the transmission power of user equipment is often variation.It please join
Fig. 1 is read, if powered using fixed voltage to power amplifier, it can be seen that nearly 80% energy is wasted.It please join
Fig. 2 is read, if adjusting supply voltage as chronomere according to the transmission power of power amplifier using 1ms, that is, use can
Time variant voltage is powered to power amplifier, then can greatly reduce the waste for electric flux, achievees the purpose that power saving.Fig. 1, Fig. 2
In black region indicate energy of the power amplifier for transmitting, oblique line filling region indicates the portion that is wasted for electric flux
Point.Here it is the principles that mean power tracking can save the power consumption of power amplifier.
User equipment will do transmission power calibration in the factory stage in order to meet protocol requirement and production requirement.School
After standard, the accuracy of the transmission power of user equipment can be greatly promoted.The realization of mean power tracking is mainly placed on calibration
Stage completes, that is to say, that will use different confessions according to the different of transmission power when calibration for power amplifier
Piezoelectric voltage.After calibration, the voltage value and transmission power level of power amplifier are corresponded in filling calibration table, this school
Quasi- table can use in the nonvolatile memory (such as flash) of programming access customer equipment for user equipment.User equipment is being done
When transmitting, the supply voltage of corresponding power amplifier can be searched in calibration table, is then controlled according to the transmission power of oneself
DC-DC (DC-DC) converter provides the supply voltage of power amplifier.
The realization of mean power tracking is divided into two kinds.If each transmission power of power amplifier is corresponding with one
The supply voltage of different power amplifiers, here it is consecutive mean power trackings.Table 1 is please referred to, this is consecutive mean power
The calibration table of tracking describes the respective different power amplifier that each transmission power P (n) of power amplifier is corresponded to
Supply voltage VCC (n).If several transmission powers of power amplifier all correspond to the power supply electricity of the same power amplifier
Pressure, here it is the tracking of discrete mean power.
Table 1: the calibration table of consecutive mean power tracking
Under the premise of meeting radio-frequency performance as defined in agreement, the supply voltage for forcing down power amplifier as far as possible can just be accomplished
Most power saving.Obviously, consecutive mean power tracking tracks more power saving than discrete mean power, because having accomplished each transmission power
Different supply voltages can be used.But consecutive mean power tracking needs to do test for each transmission power to meet radio frequency
Performance spends the time more.Although discrete mean power tracking can not accomplish that the supply voltage of each transmission power is allowed to reach
It is minimum, but implement and be easier.
Since current power amplifier is mostly MIPI control, which provides the bias voltages of change power amplifier
The convenience of (or bias current).The supplier of power amplifier can also provide a different transmission power corresponding just bias electricity
Press the parameter list of (or bias current).If optimal method is exactly each transmitting function of power amplifier for power saving
Rate all corresponds to different supply voltage and different bias voltage (or bias current).Table 2 is please referred to, this is consecutive mean
The look-up table of power tracking and continuous biasing control, describe power amplifier each transmission power P (n) correspond to it is each
From the bias voltage of the supply voltage VCC (n) of different power amplifiers and respectively different power amplifiers (or biased electrical
Stream) Bias (n).
Table 2: the look-up table of consecutive mean power tracking and continuous biasing control
This consecutive mean power tracking and the control method continuously biased no doubt can make the power consumption of power amplifier reach minimum,
But since power amplifier realizes that the difficulty of continuous Two dimensional control is larger, and due to the otherness between chip, hold very much
It easily leads to radio-frequency performance and is unable to satisfy index.To realize this method, workload is huge, and test assignment is heavy, from efficiency
It says, it is not cost-effective.
Present applicant proposes a kind of mixing mean power tracking, being exactly can be according to the power amplification in user equipment
The different transmission power dynamic of device adjusts the supply voltage of power amplifier, and can be according to the different transmitting function of power amplifier
Rate uses the bias voltage of different power amplifiers, while in turn simplifying implementation method, saves function to reach power amplifier
The final purpose of consumption.The mixing mean power tracking is preferably applied in LTE and WCDMA user equipment.
Referring to Fig. 3, the mixing mean power tracking be actually consecutive mean power tracking and it is discrete partially
One embodiment of the control method set, this method includes the following steps.
Step 31: the supply voltage of power amplifier being tracked using mean power, i.e. each to power amplifier
Transmission power level is using respectively different voltage values.Corresponding relationship example between the transmission power level and voltage value
It is obtained in this way in the transmission power calibration stage of user equipment.
Step 32: discrete control being used to the bias voltage (or bias current) of power amplifier, i.e., to power amplifier
Several adjacent transmission power levels use bias voltage (or bias current) value of an identical power amplifier, power puts
The quantity of all transmission power levels of big device is greater than the quantity of all bias voltages (or bias current) value of power amplifier.Example
Such as, power amplifier shares E kind for the value of transmission power, shares F kind for the value of bias voltage (or bias current),
Then E > F.What the corresponding relationship between the transmission power level and bias voltage (or bias current) value e.g. obtained in this way:
Adjacent several transmission power levels of power amplifier are divided into one group, the transmission power level in a group is close, Suo Youfa
It penetrates performance number and is divided into several groups, the transmission power level in a group corresponds to an identical bias voltage (or biased electrical jointly
Stream) value, difference group transmission power levels then correspond to different bias voltages (or bias current) value.
The step 31, the sequence of step 32 are perhaps exchanged or are carried out simultaneously.
Table 3 is please referred to, this is the look-up table of consecutive mean power tracking and discrete biasing control, describes power amplifier
The supply voltage VCC (n) of respective different power amplifier that corresponds to of each transmission power P (n).The hair of index 1 to n
Performance number is penetrated as group one, group one corresponds to an identical bias voltage (or bias current) Bias (1) jointly.Index m to m+k
Transmission power level be group a m, group m correspond to an identical bias voltage (or bias current) Bias (m) jointly.Index N to N
The transmission power level of+p is group N, and group N corresponds to an identical bias voltage (or bias current) Bias (N) jointly.
Table 3: the look-up table of consecutive mean power tracking and discrete biasing control
In the mixing mean power tracking, each corresponding transmission power level of bias voltage (or bias current) value with
And voltage value is all what actual measurement came out, needs to meet items RF index as defined in agreement.One bias voltage (or biasing
Electric current) value corresponds to multiple and different transmission power levels, and each transmission power level corresponds to different voltage values.
The voltage value of power amplifier is generally defined in a minimum value VCC (min) and a maximum value VCC
(max) between.After the transmission power of power amplifier is lower than some value, supply voltage remains minimum value VCC (min).When
After the transmission power of power amplifier is greater than some value, in order to not make power amplifier enter saturation state as far as possible, high-power
Under make power amplifier also and can work in linearly interval, supply voltage remains maximum value VCC (max).
Referring to Fig. 4, present invention also provides the device that a kind of power amplifier reduces power consumption, an implementation of the device
Example includes power amplifier 41, power supply unit 42 and bias unit 43.
Said supply unit 42 uses mean power tracking mode for the power supply of power amplifier 41, i.e., to power amplifier 41
Each transmission power level using respectively different voltage value.Pair between the transmission power level and voltage value
It should be related to e.g. in the transmission power calibration stage acquirement of user equipment.
The bias unit 43 uses discrete control mode to provide bias voltage (or bias current) for power amplifier 41,
An identical bias voltage (or bias current) value, function are used to several adjacent transmission power levels of power amplifier 41
The quantity of all transmission power levels of rate amplifier is greater than the number of all bias voltages (or bias current) value of power amplifier
Amount.What the corresponding relationship between the transmission power level and bias voltage (or bias current) value e.g. obtained in this way: by function
Adjacent several transmission power levels of rate amplifier are divided into one group, and the transmission power level in a group is close, all transmitting function
Rate value is divided into several groups, and the transmission power level in a group corresponds to an identical bias voltage (or bias current) jointly
The transmission power level of value, difference group then corresponds to different bias voltages (or bias current) value.
Preferably, the voltage value that said supply unit 42 provides is limited to a minimum value VCC (min) and one most
Between big value VCC (max).After the transmission power of power amplifier is lower than some value, supply voltage remains minimum value VCC
(min).After the transmission power of power amplifier is greater than some value, in order to not make power amplifier enter saturation state as far as possible,
Making power amplifier under high-power also can work in linearly interval, and supply voltage remains maximum value VCC (max).
In conclusion the method and device that the power amplifier that the application proposes reduces power consumption has both taken into account power amplifier
Low-power consumption requirement, and reduce control difficulty, the radio-frequency performance that is content with very little index reduces test job amount.
The above is only preferred embodiment of the present application, it is not used to limit the application.Come for those skilled in the art
It says, various changes and changes are possible in this application.Within the spirit and principles of this application, made any modification, equivalent
Replacement, improvement etc., should be included within the scope of protection of this application.
Claims (8)
1. a kind of method that power amplifier reduces power consumption, characterized in that include the following steps:
Step 31: the supply voltage of power amplifier being tracked using mean power, i.e., to each transmitting of power amplifier
Performance number is using respectively different voltage values；
Step 32: bias voltage or bias current to power amplifier use discrete control, i.e., to the several of power amplifier
Adjacent transmission power level uses the bias voltage or bias current value of an identical power amplifier, the institute of power amplifier
There is the quantity of transmission power level to be greater than all bias voltages of power amplifier or the quantity of bias current value；
The step 31, the sequence of step 32 are perhaps exchanged or are carried out simultaneously.
2. the method that power amplifier according to claim 1 reduces power consumption, characterized in that described in the step 31
Corresponding relationship between transmission power level and voltage value was obtained in the transmission power calibration stage of user equipment.
3. the method that power amplifier according to claim 1 reduces power consumption, characterized in that in the step 31, power
The voltage value of amplifier is limited between a minimum value and a maximum value.
4. the method that power amplifier according to claim 1 reduces power consumption, characterized in that described in the step 32
Corresponding relationship between transmission power level and bias voltage or bias current value obtains in this way: by the adjacent of power amplifier
Several transmission power levels be divided into one group, all transmission power levels are divided into several groups, and the transmission power level in a group is jointly right
Should in an identical bias voltage or bias current value, the transmission power levels of difference group then correspond to different bias voltage or
Bias current value.
5. the device that a kind of power amplifier reduces power consumption, characterized in that single including power amplifier, power supply unit and biasing
Member；
Said supply unit uses mean power tracking mode for power amplifier power supply, i.e., to each hair of power amplifier
Performance number is penetrated using respectively different voltage values；
The bias unit uses discrete control mode to provide bias voltage or bias current for power amplifier, i.e., puts to power
Several adjacent transmission power levels of big device use an identical bias voltage or bias current value, and power amplifier owns
The quantity of transmission power level is greater than all bias voltages of power amplifier or the quantity of bias current value.
6. the device that power amplifier according to claim 5 reduces power consumption, characterized in that said supply unit used
Corresponding relationship between transmission power level and voltage value was obtained in the transmission power calibration stage of user equipment.
7. the device that power amplifier according to claim 5 reduces power consumption, characterized in that said supply unit provided
Voltage value is limited between a minimum value and a maximum value.
8. the device that power amplifier according to claim 5 reduces power consumption, characterized in that the bias unit used
Corresponding relationship between transmission power level and bias voltage or bias current value obtains in this way: by the adjacent of power amplifier
Several transmission power levels be divided into one group, all transmission power levels are divided into several groups, and the transmission power level in a group is jointly right
Should in an identical bias voltage or bias current value, the transmission power levels of difference group then correspond to different bias voltage or
Bias current value.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110889961A (en) * | 2019-10-30 | 2020-03-17 | 江苏芯云电子科技有限公司 | System and method for reducing PLC power consumption and interference |
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