CN112821874A - Compression point adjusting method and device and power amplifier power supply circuit - Google Patents
Compression point adjusting method and device and power amplifier power supply circuit Download PDFInfo
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- CN112821874A CN112821874A CN202011612184.9A CN202011612184A CN112821874A CN 112821874 A CN112821874 A CN 112821874A CN 202011612184 A CN202011612184 A CN 202011612184A CN 112821874 A CN112821874 A CN 112821874A
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- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
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- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
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Abstract
The embodiment of the application provides a compression point adjusting method and device and a power amplifier power supply circuit, relates to the technical field of radio frequency communication, and can dynamically adjust the compression point according to the current environment and application scenes so as to avoid overlarge power consumption of a power amplifier. The method is applied to a radio frequency amplifier and comprises the following steps: under a currently set first compression point, acquiring a current value corresponding to the voltage on the voltage adjusting circuit; and when the current value is greater than or equal to a preset current, increasing the first compression point until the current value is less than the preset current.
Description
Technical Field
The present application relates to the field of radio frequency communication technologies, and in particular, to a method and an apparatus for adjusting a compression point, and a power amplifier and power supply circuit.
Background
The compression point is an important index for characterizing the linearity of the power amplifier, and can be used to measure the stability of the output power gain of the power amplifier.
When the compression point is selected too large, the problem of nonlinear introduction is serious, and the power of the power amplifier is reduced; when the compression point is too small, power consumption is greater.
Disclosure of Invention
The embodiment of the application provides a compression point adjusting method and device and a power amplifier power supply circuit, so as to solve the problems.
In a first aspect, a method for adjusting a compression point is provided, which is applied to a radio frequency amplifier, and the method for adjusting the compression point includes: under a currently set first compression point, acquiring a current value corresponding to the voltage on the voltage adjusting circuit; and when the current value is greater than or equal to the preset current, increasing the first compression point until the current value is less than the preset current.
In a second aspect, an apparatus for adjusting a compression point is provided, which is applied to a radio frequency amplifier, and includes an obtaining module and a processing module. And the acquisition module is used for acquiring a current value corresponding to the voltage on the voltage adjusting circuit at the currently set first compression point. And the processing module is used for increasing the first compression point when the current value is greater than or equal to the preset current until the current value is less than the preset current.
In a third aspect, a power amplifier power supply circuit is provided, including: the power amplifier power supply circuit comprises a dynamic compression point driving circuit, a radio frequency transceiving circuit, a voltage adjusting circuit and a power amplifier. And the dynamic compression point driving circuit is used for acquiring a current value corresponding to the voltage on the voltage adjusting circuit under the currently set first compression point, increasing the first compression point when the current value is greater than or equal to the preset current, and transmitting the increased first target compression point to the radio frequency transceiving circuit. And the radio frequency transceiving circuit is used for controlling the voltage adjusting circuit to adjust the current value according to the first target compression point until the current value is smaller than the preset current.
In the method and the device for adjusting the compression point and the power amplifier power supply circuit provided by the embodiment of the application, the current value corresponding to the voltage on the voltage adjusting circuit can be obtained at the currently set first compression point to represent the power consumption of the power amplifier, and when the current value is greater than or equal to the preset current, the power consumption of the power amplifier is over large, the first compression point needs to be increased to reduce the current value, so that the power consumption of the power amplifier is reduced. Compared with the situation that the compression point and the compression point parameter in the prior art are not adjustable, the method and the device can dynamically adjust the compression point so as to avoid overlarge power consumption of the power amplifier.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a diagram illustrating an operating state of a power amplifier according to an embodiment of the present disclosure;
fig. 2 is a graph comparing power and efficiency of a power amplifier in different operating states according to an embodiment of the present disclosure;
FIG. 3 is a schematic flow chart illustrating adjusting compression points according to an embodiment of the present disclosure;
FIG. 4 is a schematic diagram of increasing a compression point provided by an embodiment of the present application;
FIG. 5 is a schematic flow chart illustrating adjusting compression points according to an embodiment of the present disclosure;
FIG. 6 is a schematic diagram of increasing a compression point provided by an embodiment of the present application;
FIG. 7 is a schematic diagram of increasing a compression point provided by an embodiment of the present application;
FIG. 8 is a schematic flow chart illustrating adjustment of compression points according to an embodiment of the present disclosure;
FIG. 9 is a schematic diagram of a compression point reduction provided by an embodiment of the present application;
FIG. 10 is a schematic diagram of a compression point reduction provided by an embodiment of the present application;
FIG. 11 is a schematic flow chart illustrating adjustment of compression points according to an embodiment of the present disclosure;
FIG. 12 is a schematic flow chart illustrating adjustment of compression points according to an embodiment of the present disclosure;
fig. 13 is a block diagram illustrating a structure of a compression point adjustment apparatus according to an embodiment of the present disclosure;
fig. 14 is a schematic diagram of a power amplifier amplifying circuit provided in the embodiment of the present application;
fig. 15 is a schematic diagram of a power amplifier amplifying circuit provided in the embodiment of the present application;
fig. 16 is a schematic diagram of a power amplifier amplifying circuit provided in the embodiment of the present application;
fig. 17 is a schematic diagram of a power amplifier amplifying circuit provided in the embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. It should be noted that the features of the embodiments of the present application may be combined with each other without conflict.
In the background art, when the compression point is selected too large, the problem of nonlinear introduction is serious, and the power of the power amplifier is reduced; when the compression point is selected too small, power consumption is greater, and therefore, it is extremely important to select the compression point appropriately.
However, the operating characteristics of the power amplifier are different due to external factors such as the ambient temperature and the ambient humidity of the environment in which the power amplifier is located, and the power supply voltage for controlling the power amplifier to be turned on or off.
For example, at high temperatures, the characteristics of the power amplifier deteriorate; and at low temperatures, the characteristics of the power amplifier become better. And for the same compression point, the compression point parameter is unique, and the compression point parameter corresponding to the compression point is called no matter what the current application scene is and what the current environment is. Further, the same compression point may not satisfy the requirements of a high temperature environment, a low temperature environment, and a normal temperature environment at the same time.
In view of the above problems, the inventor has proposed a compression point adjustment method after research, which is applied to a radio frequency amplifier and can dynamically adjust a compression point according to the current environment and application scenario to avoid the power consumption of the power amplifier from being too large or too small.
The radio frequency system at least comprises a power amplifier and a voltage adjusting circuit, wherein the voltage adjusting circuit is used for inputting working voltage to the power amplifier, and when the power consumption of the power amplifier is overlarge, the power consumption of the radio frequency system is overlarge. Fig. 1 is an operation state diagram of a power amplifier, in which the horizontal axis represents an operation voltage VCC received by the power amplifier, and the vertical axis represents a voltage value corresponding to an output power of the power amplifier. The power amplifier includes both linear and non-linear operating states. As shown in fig. 2, when the power amplifier is in a non-linear state, there is a non-linear problem, for example, the generated spectral proliferation phenomenon interferes with an Adjacent Channel Leakage Ratio (ACLR), and although the efficiency of the power amplifier is increased, the power is reduced. As shown in fig. 2, when the power amplifier is in the linear region, although the power of the power amplifier is larger, the power efficiency is reduced and the power consumption is increased.
Therefore, in order to balance the power efficiency and the power consumption of the power amplifier, as shown in fig. 1, an intersection point of the nonlinear operating state and the linear operating state may be selected as a compression point, and the operating voltage input to the power amplifier by the voltage adjusting circuit may be obtained according to a compression point parameter corresponding to the compression point. The voltage adjusting circuit may be an Envelope Tracking (ET) circuit or an Average Power Tracking (APT) circuit.
In some embodiments, the voltage adjusting circuit may input different operating voltages to the power amplifier in advance to determine a plurality of compression points for calibrating the voltage adjusting circuit under different operating voltages, and determine compression point parameters corresponding to the plurality of compression points one to one, where the compression point parameters include parameters such as the operating voltage input by the voltage adjusting circuit to the power amplifier. Further, a plurality of compression points and compression point parameters determined in advance can be stored in the Char file for subsequent invocation.
In some embodiments, the radio frequency system may be applied to an electronic device, which may be, for example, a cell phone, a tablet, a computer, a smart watch, and the like.
The method for adjusting the compression point will be described with reference to the following specific embodiments:
as shown in fig. 3, the method for adjusting the compression point includes:
and S110, acquiring a current value corresponding to the voltage on the voltage adjusting circuit at the currently set first compression point.
When the power amplifier is in an operating state, the voltage regulation circuit is also in an operating state, and inputs an operating voltage VCC to the power amplifier. The current value can be obtained from the power supply of the voltage adjusting circuit, so as to reflect the power consumption of the power amplifier and the radio frequency system according to the obtained current value.
When the current value is smaller than the preset current, the power amplifiers and the radio frequency system have smaller power consumption; when the current value is greater than or equal to the preset current, the power amplifier and the radio frequency system have larger power consumption.
In some embodiments, the obtained current values may include Frequency Division Duplex (FDD) currents and Time Division Duplex (TDD) currents.
And S120, when the current value is larger than or equal to the preset current, increasing the first compression point until the current value is smaller than the preset current.
Referring to fig. 4, when the current value is greater than or equal to the preset current, a compression point greater than a first compression point may be selected from a plurality of compression points for calibrating the voltage adjustment circuit pre-stored in the Char file, a compression point parameter corresponding to the compression point is called, the working voltage VCC input to the power amplifier by the voltage adjustment circuit is adjusted, and then, the current value corresponding to the voltage on the voltage adjustment circuit is obtained again until the current value is less than the preset current.
In some embodiments, the plurality of compression points for calibrating the voltage adjustment circuit may include a plurality of compression points that are larger than the first compression point and corresponding to current values smaller than the preset current, and the operating voltage VCC input to the power amplifier by the voltage adjustment circuit may be determined according to one of the compression points and corresponding compression point parameters.
For example, the first compression point is P3dB, and if the current value corresponding to the compression point greater than P2.5db is just smaller than the preset current, the operating voltage VCC input to the power amplifier by the voltage adjusting circuit may be determined according to any one of the compression points greater than or equal to P2.5 db.
In some embodiments, considering that the power of the power amplifier may be reduced if the adjusted current value is too small, a first optimal target compression point may be selected from a plurality of compression points for calibrating the voltage adjustment circuit, and the operating voltage VCC input to the power amplifier by the voltage adjustment circuit may be determined according to the first optimal target compression point.
Optionally, as shown in fig. 4, when the current value is greater than or equal to the preset current, a first optimal target compression point is selected from a plurality of compression points for calibrating the voltage adjustment circuit, the current value at the first optimal target compression point is smaller than the preset current, and a difference between the current value at the first optimal target compression point and the preset current is smaller than differences between the current values at other compression points and the preset current.
For example, the first compression point is P3dB, the first target compression point is P2.5db, the current value at P2.5db is smaller than the preset current, and the difference between the current value at P2.5db and the preset current is smaller than the difference between the current values at other compression points and the preset current.
In some embodiments, the predetermined current corresponding to the frequency division duplex current may be a first predetermined current, and the predetermined current corresponding to the time division duplex current may be a second predetermined current.
When the frequency division duplex current is smaller than a first preset current and the time division duplex current is smaller than a second preset current, the power consumption of the power amplifier and the radio frequency system is smaller; otherwise, the power amplifier and the rf system consume more power.
In some embodiments, values of the first preset current and the second preset current are not limited, and for example, the first preset current may be 650mA, and the second preset current may be 320 mA.
In some embodiments, when adjusting the first compression point to adjust the power consumption of the power amplifier, local regulations on power consumption, voltage, current, etc. should also be considered.
The embodiment of the application provides a compression point adjusting method, which includes acquiring a current value corresponding to a voltage on a voltage adjusting circuit at a currently set first compression point to represent power consumption of a power amplifier, and when the current value is greater than or equal to a preset current, indicating that the power consumption of the power amplifier is too large, increasing the first compression point to reduce the current value, thereby reducing the power consumption of the power amplifier. Compared with the situation that the compression point and the compression point parameter in the prior art are not adjustable, the method and the device can dynamically adjust the compression point so as to avoid overlarge power consumption of the power amplifier.
As shown in fig. 5, an embodiment of the present application further provides a method for adjusting a compression point, where when a current value is greater than or equal to a preset current, a first optimal target compression point may be selected from a plurality of compression points for calibrating a voltage regulation circuit, and the method includes:
and S110, acquiring a current value corresponding to the voltage on the voltage adjusting circuit at the currently set first compression point.
The explanation of step S110 is the same as the explanation of step S110 in the foregoing embodiment, and is not repeated here.
And S121, when the current value is larger than or equal to the preset current, selecting a first target compression point from the multiple compression points in a descending order, wherein the first target compression point is larger than the first compression point.
As shown in fig. 6 and 7, the first target compression point may be selected from the plurality of compression points in order from small to large in the pointing direction of the dotted arrow in fig. 6 and 7.
And S122, acquiring a new current value corresponding to the voltage on the voltage adjusting circuit at the first target compression point.
After the first target compression point is selected, the working voltage VCC which is input to the power amplifier by the voltage adjusting circuit can be adjusted according to the first target compression point; and then, the voltage on the voltage adjusting circuit is acquired again, and a new current value is determined.
Wherein, according to the first target compression point, adjust the operating voltage VCC that the voltage regulator circuit input to the power amplifier, include: and confirming a compression point parameter corresponding to the first target compression point according to the first target compression point, and determining the working voltage VCC which is input to the power amplifier by the voltage adjusting circuit according to the compression point parameter.
In some embodiments, the operating voltage VCC input to the power amplifier by the voltage adjusting circuit varies, and the voltage on the voltage adjusting circuit varies accordingly, so that the current value corresponding to the voltage on the voltage adjusting circuit also varies.
And S123, when the new current value is smaller than the preset current, selecting a first target compression point as a first optimal target compression point.
In the process of selecting a first target compression point from a plurality of compression points according to the sequence from small to large, under the selected first target compression point, the new current value is smaller than the preset current, and the first target compression point is the first optimal target compression point.
For example, as shown in fig. 6, after the first compression point is increased once, the selected first target compression point is the first optimal target compression point.
And S124, when the new current value is larger than or equal to the preset current, selecting a first target compression point from the multiple compression points again according to the sequence from small to large, and acquiring a new current value corresponding to the voltage on the voltage adjusting circuit under the first target compression point until the new current value is smaller than the preset current.
In the process of selecting a first target compression point from a plurality of compression points according to the sequence from small to large, if the new current value is still larger than or equal to the preset current under the selected first target compression point, selecting a second first target compression point from the plurality of compression points according to the sequence from small to large again, obtaining the new current value under the second first target compression point, and so on until the new current value is smaller than the preset current under the selected Nth first target compression point, wherein the Nth first target compression point is the first optimal target compression point, and N is larger than or equal to 2.
For example, as shown in fig. 7, after the first compression point is increased twice, the selected first target compression point is the first optimal target compression point.
The embodiment of the application provides a compression point adjusting method, which is characterized in that on the basis of dynamically selecting a compression point to reduce the power consumption of a power amplifier, a first target compression point can be selected from a plurality of compression points according to the sequence from small to large, and once a new current value under the first target compression point is smaller than a preset current, the first target compression point is used as a first optimal target compression point, and the increase of the first compression point is stopped. The power of the power amplifier can be prevented from being too low due to the fact that the compression point is selected too much.
As shown in fig. 8, an embodiment of the present application further provides a method for adjusting a compression point, including:
s210, at the currently set second compression point, obtaining an Adjacent Channel Leakage power Ratio (ACLR) of the power amplifier.
When the power amplifier is in an operating state, the environment in which the power amplifier is located is different or the application scenario is different, which may cause that the leakage power ratio of adjacent channels of the power amplifier is different, and the leakage power ratio of adjacent channels may reflect the power of the power amplifier.
When the leakage power ratio of the adjacent channels is too small, the second compression point is selected to be too large, and the power of the power amplifier is too low. When the leakage power ratio of the adjacent channels is too large, the second compression point is selected to be too small, and the power of the power amplifier is too high.
And S220, when the adjacent channel leakage power ratio is out of the preset index range, adjusting a second compression point until the adjacent channel leakage power ratio is in the preset index range.
When the adjacent channel leakage power ratio is out of the preset index range, a proper compression point can be selected from a plurality of compression points which are stored in a Char file in advance and used for calibrating the voltage adjusting circuit, the compression point parameter corresponding to the compression point is called, the working voltage VCC which is input to the power amplifier by the voltage adjusting circuit is adjusted, and then the adjusted adjacent channel leakage power ratio is obtained again until the adjacent channel leakage power ratio is in the preset index range.
In some embodiments, referring to fig. 9 and 10, when the adjacent channel leakage power ratio is lower than the preset index range, the second compression point is lowered until the adjacent channel leakage power ratio is within the preset index range.
The plurality of compression points for calibrating the voltage regulation circuit may include a plurality of compression points which are smaller than the second compression point and corresponding to which the adjacent channel leakage power ratio is within a preset index range, and the operating voltage VCC input to the power amplifier by the voltage regulation circuit may be determined according to one of the compression points and a corresponding compression point parameter.
For example, the second compression point is P3dB, and if the adjacent channel leakage power ratio corresponding to the compression point smaller than p3.5db is just within the preset index range, the operating voltage VCC input to the power amplifier by the voltage adjusting circuit may be determined according to any one of the compression points smaller than or equal to p3.5db.
In some embodiments, considering that if the adjusted adjacent channel leakage power ratio is too large, the compression point is too small, which may result in too high power consumption of the power amplifier, a second optimal target compression point may be selected from the multiple compression points for calibrating the voltage adjustment circuit, and the operating voltage VCC input to the power amplifier by the voltage adjustment circuit may be determined according to the second optimal target compression point.
Optionally, as shown in fig. 9 and 10, when the adjacent channel leakage power ratio is lower than the preset index range, a second optimal target compression point is selected from the multiple compression points used for calibrating the voltage adjustment circuit, the adjacent channel leakage power ratio at the second optimal target compression point is within the preset index range, a difference between the adjacent channel leakage power ratio at the second optimal target compression point and a lower limit of the preset index range is smaller than a difference between the adjacent channel leakage power ratio at other compression points and a lower limit of the preset index range, and the adjacent channel leakage power ratio at other compression points is within the preset range.
For example, the first compression point is P3dB, the second target compression point is p3.5db, the adjacent channel leakage power ratio at p3.5db is within the preset index range, and the difference between the adjacent channel leakage power ratio at p3.5db and the lower limit of the preset index range is smaller than the difference between the adjacent channel leakage power ratio at other compression points and the lower limit of the preset index range.
In some embodiments, referring to fig. 6 and 7, when the adjacent channel leakage power ratio is higher than the preset index range, the second compression point is increased until the adjacent channel leakage power ratio is within the preset index range.
The plurality of compression points for calibrating the voltage regulation circuit may include a plurality of compression points which are larger than the second compression point and corresponding to which the adjacent channel leakage power ratio is within a preset index range, and the operating voltage VCC input to the power amplifier by the voltage regulation circuit may be determined according to one of the compression points and a corresponding compression point parameter.
For example, the second compression point is P3dB, and if the adjacent channel leakage power ratio corresponding to the compression point greater than P2.5db is just within the preset index range, the operating voltage VCC input to the power amplifier by the voltage adjusting circuit may be determined according to any one of the compression points greater than or equal to P2.5 db.
In some embodiments, considering that if the adjusted adjacent channel leakage power ratio is too small, the compression point is too large, which may result in too low power of the power amplifier, a second optimal target compression point may be selected from the multiple compression points for calibrating the voltage adjustment circuit, and the operating voltage VCC input to the power amplifier by the voltage adjustment circuit may be determined according to the second optimal target compression point.
Optionally, as shown in fig. 6 and 7, when the adjacent channel leakage power ratio is lower than the preset index range, a second optimal target compression point is selected from the multiple compression points used for calibrating the voltage adjustment circuit, the adjacent channel leakage power ratio at the second optimal target compression point is within the preset index range, a difference between the adjacent channel leakage power ratio at the second optimal target compression point and an upper limit of the preset index range is smaller than a difference between the adjacent channel leakage power ratio at other compression points and an upper limit of the preset index range, and the adjacent channel leakage power ratio at other compression points is within the preset range.
For example, the first compression point is P3dB, the second target compression point is P2.5db, the adjacent channel leakage power ratio at P2.5db is within the preset index range, and the difference between the adjacent channel leakage power ratio at P2.5db and the upper limit of the preset index range is smaller than the difference between the adjacent channel leakage power ratio at other compression points and the upper limit of the preset index range.
In some embodiments, since steps S210 and S220 precede steps S110 and S120, in the case of adjusting the second compression point, the first compression point acquired in step S110 may be the adjusted second compression point; in a case where the second compression point is not adjusted, the first compression point acquired in step S110 may be the second compression point before adjustment.
Certainly, after steps S210, S220, S110, and S120, steps S210 and S220 may be further performed to avoid that the power ratio of the adjacent channel leakage is lower than the preset index range after the compression point is increased by adjusting the current value, which results in that the second compression point is too large and the power of the power amplifier is too low.
In some embodiments, the preset index range is not limited, for example, the preset index range of the adjacent channel leakage power ratio may be 30-50 dB, and optionally, the preset index range of the adjacent channel leakage power ratio may be a value, for example, 40 dB.
The embodiment of the application provides a compression point adjusting method, before a first compression point is corrected, a leakage power ratio of an adjacent channel of a power amplifier can be obtained under a currently set second compression point to represent power and power consumption of the power amplifier, when the leakage power ratio of the adjacent channel is out of a preset index range, the reduction of the power amplifier is too low or the reduction of the power consumption is too large, and the leakage power ratio of the adjacent channel is in the preset index range by adjusting the second compression point, so that the power is increased or the power consumption is reduced. Compared with the situation that the compression point and the compression point parameter in the prior art are not adjustable, the method and the device can dynamically adjust the compression point so as to avoid too low power or too high power consumption of the power amplifier.
As shown in fig. 11, an embodiment of the present application further provides a compression point adjusting method, where when an adjacent channel leakage power ratio is lower than a preset index range, a second optimal target compression point may be selected from a plurality of compression points used for calibrating a voltage adjustment circuit, and the method includes:
s210, acquiring the adjacent channel leakage power ratio of the power amplifier under the currently set second compression point.
The explanation of step S210 is the same as the explanation of step S210 in the foregoing embodiment, and is not repeated here.
S221, when the adjacent channel leakage power ratio is lower than the preset index range, selecting a second target compression point from the multiple compression points according to the sequence from large to small, wherein the second target compression point is smaller than the second compression point.
As shown in fig. 9 and 10, the second target compression point may be selected from the plurality of compression points in order from large to small in the pointing direction of the dotted arrow in fig. 9 and 10.
And S222, acquiring a new adjacent channel leakage power ratio of the power amplifier at a second target compression point.
After the second target compression point is obtained, the working voltage VCC which is input to the power amplifier by the voltage adjusting circuit can be adjusted according to the second target compression point to adjust the adjacent channel leakage power ratio of the power amplifier to change along with the working voltage; and then, acquiring a new adjacent channel leakage power ratio again.
Wherein, according to the second target compression point, adjust the operating voltage VCC that the voltage regulator circuit input to the power amplifier, include: and confirming a compression point parameter corresponding to the second target compression point according to the second target compression point, and determining the working voltage VCC which is input to the power amplifier by the voltage adjusting circuit according to the compression point parameter.
And S223, when the leakage power ratio of the new adjacent channel is within a preset index range, selecting a second compression point as a second optimal target compression point.
In the process of selecting a second target compression point from the multiple compression points according to the descending order, if the new adjacent channel leakage power ratio is within the preset index range under the selected second target compression point, the second target compression point is the second optimal target compression point.
For example, as shown in fig. 9, after the second compression point is reduced once, the selected second target compression point is the second optimal target compression point.
S224, when the new adjacent channel leakage power ratio is lower than the preset index range, selecting a second target compression point from the multiple compression points again according to the sequence from large to small, and acquiring the new adjacent channel leakage power ratio of the power amplifier under the second target compression point until the adjacent channel leakage power ratio is in the preset index range.
In the process of selecting a first target compression point from a plurality of compression points according to the sequence from large to small, if the new adjacent channel leakage power ratio is still lower than the preset index range under the selected first second target compression point, selecting a second target compression point from the plurality of compression points according to the sequence from large to small again, obtaining the new adjacent channel leakage power ratio under the second target compression point, and so on until the new adjacent channel leakage power ratio is in the preset index range under the selected Nth second target compression point, wherein N is more than or equal to 2, and the Nth second target compression point is the second optimal target compression point.
For example, as shown in fig. 10, after the second compression point is reduced twice, the selected second target compression point is the second optimal target compression point.
The embodiment of the application provides a compression point adjusting method, on the basis of dynamically selecting compression points, a second target compression point can be selected from a plurality of compression points according to the sequence from large to small, and once the leakage power ratio of a new adjacent channel under the second target compression point is within a preset index range, the second target compression point is used as a second optimal target compression point, and reduction of the second compression point is stopped. The power amplifier can avoid overhigh power consumption caused by undersize compression point selection.
As shown in fig. 12, an embodiment of the present application further provides a compression point adjusting method, where when the adjacent channel leakage power ratio is higher than a preset index range, a second optimal target compression point may be selected from a plurality of compression points for calibrating a voltage adjustment circuit, and the method includes:
s210, acquiring the adjacent channel leakage power ratio of the power amplifier under the currently set second compression point.
The explanation of step S210 is the same as the explanation of step S210 in the foregoing embodiment, and is not repeated here.
And S225, when the adjacent channel leakage power ratio is higher than the preset index range, selecting a second target compression point from the multiple compression points according to the sequence from small to large, wherein the second target compression point is larger than the second compression point.
As shown in fig. 6 and 7, the second target compression point may be selected from the plurality of compression points in order from large to small in the pointing direction of the dotted arrow in fig. 6 and 7.
And S226, acquiring a new adjacent channel leakage power ratio of the power amplifier at the second target compression point.
After the second target compression point is obtained, the working voltage VCC which is input to the power amplifier by the voltage adjusting circuit can be adjusted according to the second target compression point to adjust the adjacent channel leakage power ratio of the power amplifier to change along with the working voltage; and then, acquiring a new adjacent channel leakage power ratio again.
Wherein, according to the second target compression point, adjust the operating voltage VCC that the voltage regulator circuit input to the power amplifier, include: and confirming a compression point parameter corresponding to the second target compression point according to the second target compression point, and determining the working voltage VCC which is input to the power amplifier by the voltage adjusting circuit according to the compression point parameter.
And S227, when the leakage power ratio of the new adjacent channel is within a preset index range, selecting a second compression point as a second optimal target compression point.
In the process of selecting a second target compression point from the multiple compression points according to the sequence from small to large, under the selected second target compression point, the new adjacent channel leakage power ratio is within the preset index range, and then the second target compression point is the second optimal target compression point.
For example, as shown in fig. 6, after the second compression point is increased once, the selected second target compression point is the second optimal target compression point.
And S228, when the new adjacent channel leakage power ratio is higher than the preset index range, selecting a second target compression point from the multiple compression points again according to the sequence from small to large, and acquiring the new adjacent channel leakage power ratio of the power amplifier under the second target compression point until the adjacent channel leakage power ratio is within the preset index range.
In the process of selecting a first target compression point from a plurality of compression points according to the sequence from small to large, if the new adjacent channel leakage power ratio is still higher than the preset index range under the selected first second target compression point, selecting a second target compression point from the plurality of compression points according to the sequence from small to large, obtaining the new adjacent channel leakage power ratio under the second target compression point, and so on until the new adjacent channel leakage power ratio is in the preset index range under the selected Nth second target compression point, wherein N is more than or equal to 2, and the Nth second target compression point is the second optimal target compression point.
For example, as shown in fig. 7, after the second compression point is increased twice, the selected second target compression point is the second optimal target compression point.
The embodiment of the application provides a compression point adjusting method, on the basis of dynamically selecting compression points, a second target compression point can be selected from a plurality of compression points according to the sequence from small to large, and once the leakage power ratio of a new adjacent channel under the second target compression point is within a preset index range, the second target compression point is used as a second optimal target compression point, and the increase of the second compression point is stopped. The power of the power amplifier can be prevented from being too low due to the fact that the compression point is selected too much.
As shown in fig. 13, the embodiment of the present application further provides an adjusting apparatus 100 for a compression point, which is applied to a radio frequency amplifier, and the adjusting apparatus 100 for a compression point includes an obtaining module 101 and a processing module 102.
The obtaining module 101 is configured to obtain a current value corresponding to a voltage on the voltage adjusting circuit at a currently set first compression point.
The processing module 102 is configured to increase the first compression point until the current value is smaller than the preset current when the current value is greater than or equal to the preset current.
On this basis, the processing module 102 is further configured to select a first optimal target compression point from the plurality of compression points for calibrating the voltage adjustment circuit when the current value is greater than or equal to the preset current, where the current value at the first optimal target compression point is smaller than the preset current, and a difference between the current value at the first optimal target compression point and the preset current is smaller than differences between current values at other compression points and the preset current.
The processing module 102 is further configured to select a first target compression point from the plurality of compression points according to a descending order when the current value is greater than or equal to the preset current, where the first target compression point is greater than the first compression point; the obtaining module 101 is further configured to obtain a new current value corresponding to a voltage on the voltage adjusting circuit at the first target compression point; the processing module 102 is further configured to select the first target compression point as a first optimal target compression point when the new current value is smaller than the preset current, select the first target compression point from the multiple compression points again according to a sequence from small to large when the new current value is greater than or equal to the preset current, and obtain a new current value corresponding to the voltage on the voltage adjustment circuit at the first target compression point until the new current value is smaller than the preset current.
The processing module 102 is further configured to adjust a working voltage input to the power amplifier by the voltage adjustment circuit according to the first target compression point; and the voltage on the voltage adjusting circuit is acquired again, and a new current value is determined.
Optionally, the obtaining module 101 is further configured to obtain an adjacent channel leakage power ratio of the power amplifier at the currently set second compression point.
The processing module 102 is further configured to adjust the second compression point when the adjacent channel leakage power ratio is outside the preset index range until the adjacent channel leakage power ratio is within the preset index range.
The embodiment of the present application provides an adjusting device 100 for a compression point, and for explanation and beneficial effects, reference is made to the foregoing embodiment, which is not repeated herein.
As shown in fig. 14, the embodiment of the present application further provides a power amplifier power supply circuit 200, which includes a dynamic compression point driving circuit 201, a radio frequency transceiver circuit (WTR)202, a voltage adjusting circuit 203, and a power amplifier 204. Referring to fig. 14, the dynamic compression point driving circuit 201 is configured to obtain a current value corresponding to a voltage on the voltage adjusting circuit 203 at a currently set first compression point, increase the first compression point when the current value is greater than or equal to a preset current, and send the increased first target compression point to the radio frequency transceiver circuit 202. And the radio frequency transceiver circuit 202 is configured to control the voltage adjustment circuit 203 to adjust the current value according to the first target compression point until the current value is smaller than the preset current.
The rf transceiver circuit 202 may control the voltage regulator circuit 203 to adjust the working voltage VCC sent to the power amplifier 204 according to the first target compression point, so as to adjust the current value.
In some embodiments, as shown in fig. 15, the rf transceiver circuit 202 is further configured to obtain a current value from the voltage adjusting circuit and send the current value to the dynamic compression point driving circuit 201. The dynamic compression point driving circuit 201 is further configured to increase the first compression point when the detected current value is greater than or equal to the preset current, and send the increased first target compression point to the radio frequency transceiver circuit 202. Then, the rf transceiver circuit 202 may control the voltage adjusting circuit 203 to adjust the current value according to the first target compression point until the current value is smaller than the preset current.
Therefore, the current value can be obtained and adjusted through the interaction between the dynamic compression point driving circuit 201 and the rf transceiver circuit 202 and the interaction between the rf transceiver circuit 202 and the voltage adjusting circuit 203, and compared with the scheme in which the voltage adjusting circuit 203 sends the current value to the dynamic compression point driving circuit 201, the logic of the embodiment of the present application is simpler.
The power amplifier discharge circuit 200 according to the embodiment of the present application can refer to the foregoing embodiments for other explanations and effective effects, which are not described herein again.
Optionally, as shown in fig. 14, the dynamic compression point driving circuit 201 is further configured to obtain, at a currently set second compression point, an adjacent channel leakage power ratio of the power amplifier 203, adjust the second compression point when the adjacent channel leakage power ratio is outside a preset index range, and send the adjusted second target compression point to the radio frequency transceiver circuit 202. The radio frequency transceiver circuit 202 is further configured to adjust the adjacent channel leakage power according to the second target compression point until the adjacent channel leakage power ratio is within the preset index range.
The rf transceiver circuit 202 may control the voltage adjusting circuit 203 to adjust the working voltage VCC sent to the power amplifier 204 according to the second target compression point, so as to adjust the adjacent channel leakage power ratio.
In some embodiments, as shown in fig. 16, the rf transceiver circuit 202 is further configured to obtain an adjacent channel leakage power ratio of the power amplifier 203 at the currently set second compression point, and send the adjacent channel leakage power ratio to the dynamic compression point driving circuit 201. The dynamic compression point driving circuit 201 is further configured to adjust the second compression point when detecting that the adjacent channel leakage power ratio is outside the preset index range, and send the adjusted second target compression point to the radio frequency transceiver circuit 202. Then, the rf transceiver circuit 202 may control the voltage adjusting circuit 203 to adjust the adjacent channel leakage power ratio according to the second target compression point until the adjacent channel leakage power ratio is within the preset index range.
On this basis, as shown in fig. 16, the power amplifier 204 may send the adjacent channel leakage power ratio and the output power to the rf transceiver circuit 202 through the same path, so as to simplify the layout design of the power amplifier discharge circuit 200. After receiving the output power, the rf transceiver circuit 202 may also adjust the operating voltage VCC, which is input to the power amplifier 204 by the power amplifier 203, according to the envelope of the output power.
The rf transceiver circuit 202 may collect output power from the output terminal of the power amplifier 204 by using a power calibration Feedback (FBRX) method.
Alternatively, as shown in fig. 17, the dynamic compression point driving circuit 201 and the rf transceiver circuit 202 may be integrated on the same chip. Thus, the control logic of the power amplifier discharge circuit 200 can be simplified.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not necessarily depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (18)
1. A method for adjusting a compression point, applied to a radio frequency amplifier, comprises the following steps:
under a currently set first compression point, acquiring a current value corresponding to the voltage on the voltage adjusting circuit;
and when the current value is greater than or equal to a preset current, increasing the first compression point until the current value is less than the preset current.
2. The method of claim 1, wherein increasing the first compression point when the current value is greater than or equal to a preset current until the current value is less than the preset current comprises:
when the current value is greater than or equal to the preset current, selecting a first optimal target compression point from a plurality of compression points for calibrating the voltage adjusting circuit, wherein the current value under the first optimal target compression point is smaller than the preset current, and the difference value between the current value under the first optimal target compression point and the preset current is smaller than the difference value between the current values under other compression points and the preset current.
3. The method of claim 2, wherein selecting a first optimal target compression point from a plurality of compression points for calibrating the voltage regulation circuit when the current value is greater than or equal to the predetermined current comprises:
when the current value is larger than or equal to a preset current, selecting a first target compression point from the plurality of compression points according to a sequence from small to large, wherein the first target compression point is larger than the first compression point;
under the first target compression point, acquiring a new current value corresponding to the voltage on the voltage adjusting circuit;
when the new current value is smaller than the preset current, selecting the first target compression point as the first optimal target compression point;
and when the new current value is larger than or equal to the preset current, selecting a first target compression point from the multiple compression points again according to the sequence from small to large, and acquiring a new current value corresponding to the voltage on the voltage adjusting circuit under the first target compression point until the new current value is smaller than the preset current.
4. The method of claim 3, wherein obtaining a new current value corresponding to the voltage across the voltage regulation circuit at the first target compression point comprises:
adjusting the working voltage input to the power amplifier by the voltage adjusting circuit according to the first target compression point;
and the voltage on the voltage adjusting circuit is acquired again, and the new current value is determined.
5. The method according to any one of claims 1-4, wherein before obtaining the current value corresponding to the voltage on the voltage regulation circuit at the currently set first compression point, the method further comprises:
acquiring the adjacent channel leakage power ratio of the power amplifier under a currently set second compression point;
and when the adjacent channel leakage power ratio is out of a preset index range, adjusting the second compression point until the adjacent channel leakage power ratio is in the preset index range.
6. The method of claim 5, wherein when the adjacent channel leakage power ratio is outside a preset target range, adjusting the second compression point until the adjacent channel leakage power ratio is within the preset target range comprises:
when the adjacent channel leakage power ratio is lower than the preset index range, reducing the second compression point until the adjacent channel leakage power ratio is in the preset index range;
and when the adjacent channel leakage power ratio is higher than the preset index range, increasing the second compression point until the adjacent channel leakage power ratio is within the preset index range.
7. The method of claim 6, wherein the decreasing the second compression point until the adjacent channel leakage power ratio is within the preset index range when the adjacent channel leakage power ratio is lower than the preset index range comprises:
when the adjacent channel leakage power ratio is lower than the preset index range, selecting a second optimal target compression point from a plurality of compression points used for calibrating the voltage adjusting circuit, wherein the adjacent channel leakage power ratio under the second optimal target compression point is in the preset index range, the difference between the adjacent channel leakage power ratio under the second optimal target compression point and the lower limit of the preset index range is smaller than the difference between the adjacent channel leakage power ratio under other compression points and the lower limit of the preset index range, and the adjacent channel leakage power ratio of other compression points is in the preset range.
8. The method of claim 7, wherein selecting a second optimal target compression point from a plurality of compression points for calibrating the voltage regulation circuit when the adjacent channel leakage power ratio is lower than the predetermined target range comprises:
when the adjacent channel leakage power ratio is lower than the preset index range, selecting a second target compression point from the multiple compression points according to a descending order, wherein the second target compression point is smaller than the second compression point;
acquiring a new adjacent channel leakage power ratio of the power amplifier under the second target compression point;
when the new adjacent channel leakage power ratio is within the preset index range, selecting the second compression point as the second optimal target compression point;
and when the new adjacent channel leakage power ratio is lower than the preset index range, selecting a second target compression point from the multiple compression points again according to the sequence from large to small, and acquiring the new adjacent channel leakage power ratio of the power amplifier under the second target compression point until the adjacent channel leakage power ratio is in the preset index range.
9. The method of claim 6, wherein increasing the second compression point until the adjacent channel leakage power ratio is within the predetermined target range when the adjacent channel leakage power ratio is above the predetermined target range comprises:
when the adjacent channel leakage power ratio is higher than the preset index range, selecting a second optimal target compression point from a plurality of compression points for calibrating the voltage adjusting circuit, wherein the adjacent channel leakage power ratio under the second optimal target compression point is within the preset index range, the difference between the adjacent channel leakage power ratio under the second optimal target compression point and the upper limit of the preset index range is smaller than the difference between the adjacent channel leakage power ratio under other compression points and the upper limit of the preset index range, and the adjacent channel leakage power ratio of other compression points is within the preset range.
10. The method of claim 9, wherein selecting a second optimal target compression point from a plurality of compression points for calibrating the voltage regulation circuit when the adjacent channel leakage power ratio is higher than the predetermined target range comprises:
when the adjacent channel leakage power ratio is higher than the preset index range, selecting a second target compression point from the multiple compression points according to a sequence from small to large, wherein the second target compression point is larger than the second compression point;
acquiring a new adjacent channel leakage power ratio of the power amplifier under the second target compression point;
when the new adjacent channel leakage power ratio is within the preset index range, selecting the second compression point as the second optimal target compression point;
and when the new adjacent channel leakage power ratio is higher than the preset index range, selecting a second target compression point from the multiple compression points again according to the sequence from small to large, and acquiring the new adjacent channel leakage power ratio of the power amplifier under the second target compression point until the adjacent channel leakage power ratio is within the preset index range.
11. The method according to any of claims 7-10, wherein said obtaining a new adjacent channel leakage power ratio of the power amplifier at the second target compression point comprises:
according to the second target compression point, the working voltage input to the power amplifier by the voltage adjusting circuit is adjusted, and the adjacent channel leakage power ratio of the power amplifier changes along with the working voltage;
and re-acquiring the new adjacent channel leakage power ratio.
12. A compression point adjusting device applied to a radio frequency amplifier is characterized by comprising:
the acquisition module is used for acquiring a current value corresponding to the voltage on the voltage regulation circuit under a currently set first compression point;
and the processing module is used for increasing the first compression point when the current value is greater than or equal to a preset current until the current value is less than the preset current.
13. The apparatus of claim 12,
the obtaining module is further configured to obtain a leakage power ratio of an adjacent channel of the power amplifier at a currently set second compression point;
and the processing module is further configured to adjust the second compression point until the adjacent channel leakage power ratio is within a preset index range when the adjacent channel leakage power ratio is outside the preset index range.
14. A power amplifier power supply circuit, characterized by comprising:
the dynamic compression point driving circuit is used for acquiring a current value corresponding to the voltage on the voltage adjusting circuit under a currently set first compression point, increasing the first compression point when the current value is greater than or equal to a preset current, and sending the increased first target compression point to the radio frequency transceiving circuit;
and the radio frequency transceiver circuit is used for controlling the voltage adjusting circuit to adjust the current value according to the first target compression point until the current value is smaller than the preset current.
15. The power amplifier supply circuit of claim 14,
the radio frequency transceiver circuit is further configured to obtain the current value from the voltage adjustment circuit and send the current value to the dynamic compression point driving circuit;
the dynamic compression point driving circuit is further configured to increase the first compression point when the current value is detected to be greater than or equal to a preset current, and send the increased first target compression point to the radio frequency transceiver circuit.
16. The power amplifier discharge circuit of claim 14,
the dynamic compression point driving circuit is further configured to obtain a leakage power ratio of an adjacent channel of the power amplifier at a currently set second compression point, adjust the second compression point when the leakage power ratio of the adjacent channel is outside a preset index range, and send an adjusted second target compression point to the radio frequency transceiver circuit;
the radio frequency transceiver circuit is further configured to adjust the adjacent channel leakage power according to the second target compression point until the adjacent channel leakage power ratio is within the preset index range.
17. The power amplifier discharge circuit of claim 16,
the radio frequency transceiver circuit is further configured to acquire an adjacent channel leakage power ratio of the power amplifier at a currently set second compression point, and send the adjacent channel leakage power ratio to the dynamic compression point driving circuit;
and the dynamic compression point driving circuit is further used for adjusting the second compression point and sending the adjusted second target compression point to the radio frequency transceiver circuit when the adjacent channel leakage power ratio is detected to be out of a preset index range.
18. The power amplifier discharge circuit of any of claims 14-17, wherein the dynamic pinch point driver circuit and the rf transceiver circuit are integrated on the same chip.
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