CN106953613A - The power supply circuit and power regulating method of power amplifier - Google Patents
The power supply circuit and power regulating method of power amplifier Download PDFInfo
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- CN106953613A CN106953613A CN201710192533.8A CN201710192533A CN106953613A CN 106953613 A CN106953613 A CN 106953613A CN 201710192533 A CN201710192533 A CN 201710192533A CN 106953613 A CN106953613 A CN 106953613A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3036—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers
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Abstract
The present embodiments relate to electronic technology field, the power supply circuit and power regulating method of a kind of power amplifier are disclosed.The power supply circuit of the power amplifier includes：Electric power management circuit, control circuit and switching circuit；Electric power management circuit has at least two voltage output ends；Wherein, the output voltage of voltage output end is different；Circuit is controlled to control switching circuit alternatively to select at least two voltage output ends to be powered for power amplifier.The power supply circuit and power regulating method of power amplifier provided in an embodiment of the present invention, had both optimized the electric current needed for power amplifier work, cost have been taken into account again.
Description
Technical field
The present invention relates to electronic technology field, the power supply circuit of more particularly to a kind of power amplifier and power adjustment side
Method.
Background technology
Power amplifier (power amplifier, referred to as " power amplifier " or " PA "), refers under the conditions of given distortion rate,
Maximum power output can be produced to drive the amplifier of a certain load.With the development of electronic technology, in order to improve the property of equipment
Can, power amplifier is widely used, particularly radio-frequency power amplifier (Radio Frequency power
Amplifier, and referred to as " RF PA ") it is important part in the equipment with sending function.
Because radio-frequency power amplifier is that power output, the level of drive, power consumption, distortion, efficiency, size and weight etc. are asked
Topic makees the electronic circuit considered.In emission system, the scope of radio-frequency power amplifier power output can be as small as milliwatt
(mW) it is, big to thousands of watts (kW), in order to realize the output of appropriate power, it is necessary to have the voltage for meeting actual demand as power supply
Power supply.
At present, typically using cell voltage (Voltage of Battery, referred to as " VBAT ") or power switch mould
Hurry up (DC/DC) be powered for PA.But during the present invention is realized, inventor has found to ask in the presence of some in the prior art
Topic：Electric current when using VBAT to be powered for PA, although cost is relatively low, but PA work can be increased；Using DC/DC (power supplys
Switch module) it is powered for PA, although the electric currents of PA operationally can be optimized, but cost is of a relatively high, undoubtedly increases
The manufacturing cost of terminal is added.
The content of the invention
The purpose of embodiment of the present invention is the power supply circuit and power regulating method for providing a kind of power amplifier, both
The electric current needed for power amplifier work is optimized, cost has been taken into account again.
In order to solve the above technical problems, embodiments of the present invention provide a kind of power supply circuit bag of power amplifier
Include：Electric power management circuit, control circuit and switching circuit；Electric power management circuit has at least two voltage output ends；Wherein,
The output voltage of voltage output end is different；Control circuit control switching circuit alternatively selects at least two voltage output ends
Powered for power amplifier.
Embodiments of the present invention additionally provide a kind of power regulating method, based on the work(in any embodiment of the invention
The power supply circuit of rate amplifier, applied to control circuit.The power regulating method includes：It is in running order in power amplifier
When, obtain signal output index；Wherein, signal output index is used for the power output for controlling power amplifier；It is defeated according to signal
Going out norm controlling switching circuit alternatively selects at least two voltage output ends to be powered for power amplifier.
Embodiment of the present invention is in terms of existing technologies, (electric by using original power supply in terminating circuit
The voltage output end of power management circuits), by controlling the cooperation of circuit and switching circuit, realization is cut from different voltage output ends
Connection is changed, so that the effect of power supply needed for having reached optimization power amplifier work, and taken into account cost.
In addition, the signal output part of control circuit is connected to the control end of switching circuit, electric power management circuit each
Voltage output end is respectively connecting to an input of switching circuit, and the output end of switching circuit connects the input of power amplifier
End；Wherein, it is more than the support output of power supply circuit current voltage in the power output of signal output index request power amplifier
During peak power output, control circuit control switching circuit is switched to output voltage higher than current voltage by current voltage output end
The voltage output end of output end；It is less than power supply circuit current voltage in the power output of signal output index request power amplifier
During the minimum output power of setting, control circuit control switching circuit by current voltage output end be switched to output voltage less than work as
The voltage output end of preceding voltage output end.The power supply circuit of the power amplifier provided in embodiment of the present invention is by by power supply
Management circuit, control circuit are connected with switching circuit according to above-mentioned connected mode so that control circuit can be different by exporting
Signal output norm controlling switching circuit be connected to suitable voltage output end and powered for power amplifier, so as to reach automatic
The working power of regulation optimization power amplifier.
In addition, switching circuit has several switch units；Wherein, the number of switch unit and the number of voltage output end
It is identical, and switch unit and voltage output end one-to-one corresponding；Controlling circuit has several signal output parts；Wherein, signal is defeated
The number for going out end is identical with the number of switch unit, and signal output part is corresponded with switch unit.By in power amplification
Set and the same number of switch unit of voltage output end and signal output part in the power supply circuit of device, and ensure that each is cut
Unit one signal corresponding thereto output end of correspondence and voltage output end are changed, so as to need to export different in power supply circuit
Voltage when being powered for power amplifier, by different signal output parts, control corresponding switch unit be turned on or off with
Connection voltage output end so that reach automatically adjust optimization power amplifier working power, provided for power amplifier
Suitable supply voltage.
In addition, the conduction resistance value of switch unit is less than 0.1 Europe, capacitance span is between the microfarad of 9 microfarads~11.
Embodiment of the present invention provides a kind of selection rule of switch unit, it is to avoid the supply voltage provided is deposited in power supply circuit
In unnecessary loss, the effect of optimization to power amplifier working power is further ensured.
In addition, switch unit is electronic switch；Wherein, the control end of electronic switch is connected with corresponding signal output part,
The input of input voltage output end connection corresponding with electric power management circuit, output end and power amplifier is connected.This
It is convenient to realize by using conventional electronic switch as switch unit in invention embodiment, it is easy to control.
In addition, the power supply circuit of power amplifier also includes biasing resistor；The number of biasing resistor and signal output part
Number is identical, and each biasing resistor one signal output part of correspondence and a switch unit；Wherein, the first of biasing resistor
End is connected with signal output part, and the second end of biasing resistor and the control end of switch unit are connected.By increasing in power supply circuit
If biasing resistor, and ensure that biasing resistor and signal output part and switch unit are corresponded, so as to being switching circuit
Appropriate bias current is provided, the operating current that switching circuit provides for power amplifier is further optimized.
In addition, the power supply circuit of power amplifier also includes filter unit；The first end of filter unit and switching circuit
Output end is connected, the second end ground connection of filter unit.By setting up filter unit in power supply circuit, so as to which electricity will be switched
The glitch target signal filter that road is produced in the connection procedure of switching and voltage output end, it is ensured that the stabilization of output voltage,
Further optimize the operating current that switching circuit provides for power amplifier.
Brief description of the drawings
One or more embodiments are illustrative by the picture in corresponding accompanying drawing, these exemplary theorys
The element with same reference numbers label is expressed as similar element in the bright restriction not constituted to embodiment, accompanying drawing, removes
Composition is not limited the non-figure having in special statement, accompanying drawing.
Fig. 1 is the schematic diagram of the power supply circuit of the power amplifier of first embodiment of the invention；
Fig. 2 is the schematic diagram of the power supply circuit of the power amplifier of second embodiment of the invention；
Fig. 3 is the schematic diagram of the power supply circuit of the power amplifier of third embodiment of the invention；
Fig. 4 is the flow chart of the power regulating method of four embodiment of the invention；
Fig. 5 be four embodiment of the invention power regulating method based on power amplifier power supply circuit signal
Figure.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with each reality of the accompanying drawing to the present invention
The mode of applying is explained in detail.However, it will be understood by those skilled in the art that in each embodiment of the invention,
In order that reader more fully understands the application and proposes many ins and outs.But, even if without these ins and outs and base
Many variations and modification in following embodiment, can also realize the application technical scheme claimed.
The first embodiment of the present invention is related to a kind of power supply circuit of power amplifier, as shown in Figure 1.
The power supply circuit of power amplifier specifically includes electric power management circuit 100, control circuit 200 and switching circuit
300.Wherein, electric power management circuit 100 has at least two voltage output ends, and Fig. 1 is exemplified by two.Control circuit 200 is controlled
Switching circuit 300 alternatively selects at least two voltage output ends to be powered for power amplifier, that is, controls the control switching of circuit 200
One voltage output end of the selection electric power management circuit of circuit 300 is powered for power amplifier.
Specifically, the signal output part of control circuit 200 is connected to the control end of switching circuit 300, power management electricity
Each voltage output end on road 100 is respectively connecting to an input of switching circuit 200, the output end of switching circuit 200
Connect the input of power amplifier.
In addition, in order to ensure that power amplifier is actually needed the power of output (i.e. subsequent time needs the power exported)
Be sized to meet in the requirement of signal output index, embodiment of the present invention, electric power management circuit 100 have at least two
The output voltage of voltage output end is different.
It should be noted that power amplifier subsequent time needs the power exported to be determined by control circuit 200, have
Control circuit 200 in the present embodiment of body can be the processor of terminal inner, and processor is according to feedback information (such as base
Stand send instruction) determine subsequent time power supply circuit need to provide operating voltage of the great voltage as power amplifier,
I.e. the control control of circuit 200 switching circuit 300 is switched to the satisfactory voltage output of output voltage by current voltage output end
End.
Specifically, in actual applications, when the power output of signal output index request power amplifier is more than power supply electricity
When road current voltage supports the peak power output of output, control circuit control switching circuit is switched to by current voltage output end
Output voltage is higher than the voltage output end of current voltage output end；When the power output of signal output index request power amplifier
Less than power supply circuit current voltage set minimum output power when, control circuit control switching circuit by current voltage output end
It is switched to the voltage output end that output voltage is less than current voltage output end.
Compared with prior art, the power supply circuit of the power amplifier provided in present embodiment, using in terminating circuit
Original power supply (voltage output end of electric power management circuit), by controlling the cooperation of circuit and switching circuit, realize with
The switching connection of different voltage output ends, so that the effect of power supply needed for having reached optimization power amplifier work, and take into account
Cost.
Second embodiment of the present invention is related to a kind of power supply circuit of power amplifier.Present embodiment is implemented first
Further improvement is done on the basis of mode, specific improvements are：Set and voltage output end number phase in power supply circuit
Same signal output part and switch unit, and each switch unit correspondence one corresponding signal output part and voltage output
End, it is specific as shown in Figure 2.
As shown in Fig. 2 the power supply circuit of the power amplifier in present embodiment except including the circuit shown in Fig. 1 it
Outside, number, the number of the switch unit of switching circuit 300 and the electric power management circuit 100 of the signal output part of control circuit 200
Voltage output end number it is identical.
Specifically, there is control circuit 200 several signal output parts, switching circuit 300 to have several switchings single
Member.
Wherein, the number of switch unit and the number of voltage output end are identical, and switch unit and voltage output end are one by one
Correspondence.The number of signal output part is identical with the number of switch unit, and signal output part is corresponded with switch unit.Also
It is to say, voltage output end one switch unit of correspondence, signal output part one switch unit of correspondence.
It should be noted that voltage output end number, signal output part number in the power supply circuit that present embodiment is provided
Mesh, switch unit number are exemplified by two, but the voltage output end number of electric power management circuit 100 is not in actual applications
Two are confined to, there can be three or more than three, accordingly the signal output part in control circuit 200, in switching circuit 300
Switch unit extend also to three or more than three, according to actual needs set respective number voltage output end, letter
Number output end, switch unit can be limited herein.
In addition, in order to avoid the supply voltage that the voltage output end of electric power management circuit 100 is provided is flowing through switch unit
There is unnecessary loss during exporting to power amplifier, the switch unit generally chosen be conduction resistance value be less than
0.1 Europe, element of the capacitance span between the microfarad of 9 microfarads~11 can be specifically an electronic switch, Huo Zhefu
Triode, FET of selection rule etc. are closed, will not enumerate, be also not particularly limited herein, in actual applications root
According to needing to choose suitable element as switch unit.
In addition, in actual applications, because the operating voltage that different power amplifiers needs is different, not needing in the same time
The operating voltage wanted is also different, therefore the conduction resistance value of switch unit and the value of capacitance are not limited to above-mentioned value feelings
Condition, those skilled in the art can be as needed, selects the switch unit of suitable current power amplifier power supply circuit, it is ensured that
The power supply circuit with normal work, can reach the purpose of adjustment power amplifier working power, not be limited herein.
When the switch unit of selection is the electronic switch for meeting above-mentioned requirements, the control end of electronic switch and corresponding letter
Number output end connection, input voltage output end corresponding with electric power management circuit 100 is connected, output end and power amplifier
Input connection, so as to the output according to signal output part, the input of electronic switch is connected to power management electricity
Corresponding voltage output end in road 100 so that the voltage that the voltage output end is provided can be carried by the output end of electronic switch
Supply power amplifier.
In addition, it is noted that in actual applications in order to simplify circuit so that the equipment of preparation is more frivolous, body
Product is more compact, the signal in switch unit and control circuit 200 in the power supply circuit of power amplifier in switching circuit 300
Output end can also only have the chip that one, i.e. switching circuit 300 and control circuit 200 can enter singly to go out more using having, from
And can also reach the effect of simplified circuit while realizing that handoff functionality optimizes power amplifier working power.
Compared with prior art, in present embodiment, by setting defeated with voltage in the power supply circuit of power amplifier
Go out to hold the same number of switch unit and signal output part, and ensure each switch unit one corresponding letter of correspondence
Number output end and voltage output end, so as to when power supply circuit needs to export different voltages and powered for power amplifier,
By different signal output parts, corresponding switch unit is controlled to be turned on or off the voltage output end being attached thereto, so as to reach
To the working power for automatically adjusting optimization power amplifier, suitable supply voltage is provided for power amplifier.
Third embodiment of the present invention is related to a kind of power supply circuit of power amplifier.Present embodiment is first or
Further improvement is done on the basis of two embodiments, specific improvements are：Biasing resistor is also additionally arranged in power supply circuit
400 and filter element 500, so that the electric current being supplied to needed for power amplifier work is further optimized, specifically such as Fig. 3 institutes
Show.
As shown in figure 3, the power supply circuit of the power amplifier in present embodiment except including the circuit shown in Fig. 2,
Outside unit, also including biasing resistor 400 and filter element 500.
Specifically, the signal output part connection of the first end of biasing resistor 400 and signal output part, the of biasing resistor
The control end connection of two ends and switch unit.The first end of filter unit 500 and the output end of switching circuit are connected, filter unit
The second end ground connection.
It should be noted that in embodiment of the present invention, the number of biasing resistor 400 is identical with the number of signal output part
(in present embodiment exemplified by two), and each biasing resistor 400 one signal output part of correspondence and a switch unit,
So as to provide appropriate bias current for switch unit, the work that power supply circuit provides for power amplifier is further optimized
Make electric current.
In addition, it is noted that the resistance value for the biasing resistor 400 chosen in present embodiment and control circuit 200
The maximum output current of output is relevant, when choosing biasing resistor 400, it is ensured that pass through the biased electrical exported after biasing resistor 400
Stream is less than the maximum output current of control circuit 200, more than the minimum current of the output of switching circuit 300, thus be accordingly used in
The biasing resistor 400 for providing appropriate bias current for switch unit is not limited to resistance, can also meet above-mentioned for others
It is required that electronic component, those skilled in the art can select suitable electronic component to be used as biased electrical according to actual needs
Resistance 400, is not particularly limited herein.
In addition, being used for the glitch target signal filter that will be produced in handoff procedure in present embodiment, it is ensured that output voltage
Stable filter unit 500, can generally choose electric capacity that capacitance is 10UF as filter unit 500.
In addition, in actual applications, the operating current of power amplifier is bigger, the capacitance of the filter capacitor of selection also phase
Ying Yue great.Therefore, satisfactory power can be exported according to signal output index to meet power amplifier, can chosen
The capacitor combination of a variety of capacitances is a filter unit 500, and the capacitance of each electric capacity can be 10UF, 100NF, 100PF, tool
The electric capacity that can choose appropriate electrical capacitance according to actual needs of body is combined, and is not limited herein.
Compared with prior art, in present embodiment, by setting up biasing resistor, filter unit in power supply circuit, and
And ensure that biasing resistor is corresponded with signal output part and switch unit, so as to provide appropriate biasing for switching circuit
Electric current, further optimizes the operating current that switching circuit provides for power amplifier.By setting up filtering in power supply circuit
Unit, so as to the glitch target signal filter for producing switching circuit in the connection procedure of switching and voltage output end,
The stabilization of output voltage is ensure that, the operating current that switching circuit provides for power amplifier is further optimized.
The 4th embodiment of the present invention is related to a kind of power regulating method, based on the work(in any embodiment of the invention
The power supply circuit of rate amplifier, applied to control circuit.The idiographic flow of the power regulating method is as shown in Figure 4.
In step 401, signal output index is obtained.
Specifically, when power amplifier is in running order, control circuit (being specifically as follows processor) obtains letter
Number output-index, the instruction that such as a certain base station is sent.
Put it should be noted that the signal output index for controlling circuit to obtain in present embodiment is mainly used in control power
The power output of big device.
In step 402, switching circuit is controlled alternatively to select at least two voltage output ends to be powered for power amplifier.
Specifically, control circuit alternatively selects at least two according to the signal output norm controlling switching circuit got
Individual voltage output end is powered for power amplifier, that is, selects wherein that voltage output end is powered for power amplifier all the way.
It is more than power supply circuit current voltage in the power output of signal output index request power amplifier and supports output
During peak power output, control switching circuit is switched to output voltage higher than current voltage output end by current voltage output end
Voltage output end；It is less than power supply circuit current voltage in the power output of signal output index request power amplifier to set most
During small power output, control switching circuit is switched to the electricity that output voltage is less than current voltage output end by current voltage output end
Press output end.
As shown in figure 5, the power being combined into three voltage output ends, three signal output parts and three switch units is put
Exemplified by the power supply circuit of big device, it is specifically described, in actual applications, it is ensured that the different voltage of at least two output voltages
Output end, is not limited here.
As shown in figure 5, V2, V1, V0 are three voltage output ends of electric power management circuit, and V2 ＞ V1 ＞ V0, typically
V1 value can be (V0+V2)/2, specifically can according to actual needs set, not be limited herein.
Wherein, V2 is voltage highest power supply, and its voltage, which must assure that, can meet power amplifier Maximum Power Output
(PMAX) performance requirement when, such as can be used as highest power supply from cell voltage VBAT.
VOUT is power output end, for the power supply exported after switch unit (in Fig. 5 by taking triode as an example) to be carried
Supply power amplifier is used as working power.
CNT2, CNT1, CNT0 are three signal output parts, for exporting three kinds of different signal output indexs, so as to
To control the switch unit being attached thereto and suitable voltage output end to turn on.
CNT2, CNT1, CNT0 can also be three output unlike signal output-indexes of processor in actual applications
Pin.
Q2, Q1, Q0, which are three, to be had in different conduction resistance values and the switch unit of capacitance, Fig. 5 by taking triode as an example,
Suitable field-effect circuits, electronic switch, relay etc. can also be chosen in practical application as switch unit.
R2, R1, R0 are the biasing resistor of three different resistance values, are mainly used in the triode in switch unit, i.e. Fig. 5
Appropriate bias current is provided.
It should be noted that not having magnitude relationship between three biasing resistors, it is inclined that its resistance value and triode need
Put electric current or signal output part supports that the maximum current of output is relevant.
C1 is filter capacitor, can also be used as filter unit using energy-storage travelling wave tube in actual applications.It can generally choose
Capacitance is 10UF, or a variety of capacitances combination, such as 10UF+100NF+100PF filters handoff procedure as filter unit
In glitch, it is ensured that the stabilization of output voltage.
When beginning to use the power output of power supply circuit adjustment power amplifier of above-mentioned power amplifier, measurement in advance
Choose V2, V1, V0 as power amplifier working power when, be able to support power amplifier output, and meet every
The peak power of index,.
Specifically, when setting V1 as the working power of power amplifier, if (P is letter to power amplifier requirements power output P
Number output-index meets desired power output) (P1 is power amplifier when working power is V1 to ＜=P1, it is allowed to output
Peak power output, wherein, P1 ＜ PMAX) when, judging the power output of power amplifier, to meet signal output index request defeated
The power gone out；If power amplifier output power P>During P1, the power output of power amplifier is unsatisfactory for signal output index
It is required that the power of output.
It should be noted that in actual applications, signal output index can be mark power output, the finger of distorted signals
Mark, such as error vector magnitude, output signal spectrum etc..
If V0 is power amplifier power supply, if power amplifier present output power P ＜=(P0 is power amplification to P0
Device is when working power is V0, the peak power for the output that can be exported on the premise of indices are met, wherein, P0 ＜ P1
＜ PMAX) when, judge that the power output of power amplifier meets the power of signal output index request output；If power amplification
Device power output P>During P0, the power output of power amplifier is unsatisfactory for the power of signal output index request output.
In addition, in order to avoid due to unstable working condition caused by electronic component difference, it will usually in power supply circuit
(N-1) individual compensation power P marge (N is the number of switch unit), such as compensation power P marge0, compensation power are set
Pmarge1, and the value of each compensation power is all higher than being equal to 0, specifically could be arranged to 1.5dB, the value specifically set can be with
Show that here is omitted by the performance statistics for measuring multiple electronic devices.
In addition, in order that switching point during power rise and during power drop is different, it is to avoid switching ping-pong (table tennis
Effect refers to back and forth becoming between two different states), it will usually (N-1) individual difference power is set in power supply circuit
Value DeltaP (N is the number of switch unit), such as power difference DeltaP0, power difference DeltaP1, and each power difference
Value be all higher than being equal to 0, specifically could be arranged to 2dB, the value specifically set can be by measuring the property of multiple electronic devices
It can count and draw, here is omitted.
Power switched point Pswitch, power switched point Pswitch11=P1-Pmarge1 for V1 is set, switches work(
Rate point Pswitch12=Pswitch11-DeltaP1 (not embodied in figure).
Power switched point Pswitch, power switched point Pswitch01=P0-Pmarge0 for V0 is set, switches work(
Rate point Pswitch02=Pswitch01-DeltaP0 (not embodied in figure).
Knowable to above-mentioned setting, Pswitch11>Pswitch12>Pswitch01>Pswitch02.
After above-mentioned preparation is completed, the power supply circuit that control circuit starts based on the power amplifier is realized to power
The adjustment of amplifier output power, specifically：
Can be specifically the signal output index that processor is got if signal output part when power supply circuit works
It is required that power amplifier output power from minimum power taper to peak power when, processor control CNT0 pins output 1,
CNT1 pins and CNT2 pins output 0 are controlled, the voltage output end V0 of Q0 connections, output minimum voltage V0 to work(is now only turned on
Rate amplifier power end.
It should be noted that " 1 " represents effective herein, it is invalid that " 0 " is represented, in actual applications also can table in other ways
Show, such as " 0 " is represented effectively, and it is invalid that " 1 " is represented, now control CNT0 pins output 0, control CNT1 pins and CNT2 pins are defeated
Go out 1, other guide can also be exported as needed, is not limited herein.
When power amplifier needs the power rise exported, the working power or V0 of power amplifier, until power
When amplifier output power rises to power switched point Pswitch01, signal output index request power amplifier output power
When tapering to peak power from minimum power, processor control CNT1 pins output 1 controls CNT0 pins and CNT2 pins
Output 0, now only turns on the voltage output end V1 of Q1 connections, and output V1 is given to power amplifier power supply end.
When power amplifier needs the power exported to continue to rise, the now working power or V1 of power amplifier,
When power amplifier output power reaches power switched point Pswitch11, processor control CNT2 pins output 1, control
CNT0 pins and CNT1 pins output 0；The voltage output end V2 of Q2 connections is now only turned on, output ceiling voltage V2 is put to power
Big device power end.
Conversely, when power supply circuit works, if control single channel, can be specifically that the signal output that processor is got refers to
Mark require power amplifier output power from peak power taper to minimum power when, processor control CNT2 pins output
1, control CNT0 pins and CNT1 pins export 0, now only turn on the voltage output end V2 of Q2 connections, and output ceiling voltage V2 is arrived
Power amplifier power supply end.
When power amplifier needs the power reduction exported, the now working power or V2 of power amplifier, until
When power amplifier output power is reduced to power switched point Pswitch12, processor control CNT1 pins output 1, control
CNT0 pins and CNT2 pins output 0, now only turn on the voltage output end V1 of Q1 connections, output V1 to power amplifier power supply
End.
When power amplifier needs the power exported to continue to reduce, the now working power or V1 of power amplifier,
When power amplifier output power is reduced to power switched point Pswitch02, processor control CNT0 pins output 1, control
CNT1 pins and CNT2 pins output 0 processed, now only turns on the voltage output end V0 of Q0 connections, output minimum voltage V0 to power
APS amplifier power supply end.
Based on the power supply circuit of above-mentioned power amplifier, and according to above-mentioned power regulating method, switching circuit is according to signal
Output-index is by switch to the different voltage output end of output voltage, you can realize to working power needed for power amplifier
Optimization, it is convenient to realize, and simply.
Compared with prior art, the power regulating method provided in present embodiment, based on any embodiment of the invention
The power supply circuit of the power amplifier of middle offer, the signal output index request power amplifier output got in control circuit
When power changes, control circuit selects suitable voltage output end to connect according to signal output norm controlling switching circuit, is work(
Rate amplifier is powered, so that the effect of power supply needed for having reached optimization power amplifier work, and taken into account cost.
It will be understood by those skilled in the art that the respective embodiments described above are to realize the specific embodiment of the present invention,
And in actual applications, can to it, various changes can be made in the form and details, without departing from the spirit and scope of the present invention.
Claims (9)
1. a kind of power supply circuit of power amplifier, it is characterised in that including electric power management circuit, control circuit and switching electricity
Road；
The electric power management circuit has at least two voltage output ends；Wherein, the output voltage of the voltage output end is each not
It is identical；
It is described to control circuit to control the switching circuit alternatively to select at least two voltage output end to be put for the power
Big device is powered.
2. the power supply circuit of power amplifier according to claim 1, it is characterised in that
The signal output part of the control circuit is connected to the control end of the switching circuit, the electric power management circuit it is each
Individual voltage output end is respectively connecting to an input of the switching circuit, and the output end of the switching circuit connects the work(
The input of rate amplifier；
Wherein, it is more than the power supply circuit current voltage branch in the power output of power amplifier described in signal output index request
When holding the peak power output of output, the control circuit controls the switching circuit to be switched to output by current voltage output end
Voltage is higher than the voltage output end of current voltage output end；
It is less than the power supply circuit current voltage in the power output of power amplifier described in signal output index request and supports defeated
During the minimum output power gone out, the control circuit controls the switching circuit to be switched to output voltage by current voltage output end
Less than the voltage output end of current voltage output end.
3. the power supply circuit of power amplifier according to claim 1 or 2, it is characterised in that
The switching circuit has several switch units；Wherein, the number of the switch unit and the voltage output end
Number is identical, and the switch unit is corresponded with the voltage output end；
The control circuit has several signal output parts；Wherein, the number of the signal output part and the switch unit
Number it is identical, and the signal output part and the switch unit correspond.
4. the power supply circuit of power amplifier according to claim 3, it is characterised in that the electric conduction of the switch unit
Resistance is less than 0.1 Europe, and capacitance span is between the microfarad of 9 microfarads~11.
5. the power supply circuit of power amplifier according to claim 3, it is characterised in that the switch unit is electronic cutting
Close；
Wherein, the control end of the electronic switch is connected with the corresponding signal output part, input and the power management
Corresponding voltage output end connection in circuit, output end is connected with the input of the power amplifier.
6. the power supply circuit of power amplifier according to claim 3, it is characterised in that the power supply of the power amplifier
Circuit also includes biasing resistor；
The number of the biasing resistor is identical with the number of the signal output part, and each described biasing resistor correspondence one
Signal output part and a switch unit；
Wherein, the first end of the biasing resistor is connected with the signal output part, the second end of the biasing resistor with it is described
The control end connection of switch unit.
7. the power supply circuit of power amplifier according to claim 3, it is characterised in that the power supply of the power amplifier
Circuit also includes filter unit；
The first end of the filter unit is connected with the output end of the switching circuit, the second end ground connection of the filter unit.
8. a kind of power regulating method, it is characterised in that the power supply circuit based on the power amplifier described in claim 1, should
For the control circuit；
The power regulating method includes：
When power amplifier is in running order, signal output index is obtained；Wherein, the signal output index is used to control
The power output of the power amplifier；
It is institute that the switching circuit according to the signal output norm controlling, which alternatively selects at least two voltage output end,
Power amplifier is stated to power.
9. power regulating method according to claim 8, it is characterised in that according to the signal output norm controlling
Switching circuit alternatively selects at least two voltage output end to be powered for the power amplifier, specifically includes：
It is more than the power supply circuit current voltage in the power output of power amplifier described in signal output index request and supports defeated
During the peak power output gone out, the switching circuit is controlled to be switched to output voltage higher than current voltage by current voltage output end
The voltage output end of output end；
It is less than what the power supply circuit current voltage was set in the power output of power amplifier described in signal output index request
During minimum output power, control the switching circuit to be switched to output voltage by current voltage output end and exported less than current voltage
The voltage output end at end.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710192533.8A CN106953613A (en) | 2017-03-28 | 2017-03-28 | The power supply circuit and power regulating method of power amplifier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710192533.8A CN106953613A (en) | 2017-03-28 | 2017-03-28 | The power supply circuit and power regulating method of power amplifier |
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| CN106953613A true CN106953613A (en) | 2017-07-14 |
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| CN201710192533.8A Pending CN106953613A (en) | 2017-03-28 | 2017-03-28 | The power supply circuit and power regulating method of power amplifier |
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| CN (1) | CN106953613A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110955353A (en) * | 2019-10-11 | 2020-04-03 | 基合半导体（宁波）有限公司 | Drive circuit of capacitive screen, drive circuit output method and mobile terminal |
| CN112653400A (en) * | 2020-12-10 | 2021-04-13 | Oppo（重庆）智能科技有限公司 | Amplifying circuit, control method thereof, electronic device, and storage medium |
| CN114553251A (en) * | 2020-11-26 | 2022-05-27 | 华为技术有限公司 | Wireless communication system, power supply circuit and device |
| CN118376844A (en) * | 2024-06-25 | 2024-07-23 | 中国第一汽车股份有限公司 | Internal resistance testing circuit of oxygen sensor, device and testing method thereof |
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| CN110955353A (en) * | 2019-10-11 | 2020-04-03 | 基合半导体（宁波）有限公司 | Drive circuit of capacitive screen, drive circuit output method and mobile terminal |
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