CN106253863A - A kind of power amplifier impedance auto-adjusting circuit and power amplifier - Google Patents
A kind of power amplifier impedance auto-adjusting circuit and power amplifier Download PDFInfo
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- CN106253863A CN106253863A CN201610503809.5A CN201610503809A CN106253863A CN 106253863 A CN106253863 A CN 106253863A CN 201610503809 A CN201610503809 A CN 201610503809A CN 106253863 A CN106253863 A CN 106253863A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/56—Modifications of input or output impedances, not otherwise provided for
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Abstract
The invention discloses a kind of power amplifier impedance auto-adjusting circuit and power amplifier, wherein, power amplifier impedance adjustment circuit includes single-chip microcomputer, presets detector unit, the first programmable power supply, adjustable input matching network, the second programmable power supply and tunable output matching network；Adjustable input matching network provides source impedance for power tube；Tunable output matching network provides load impedance for power tube；Single-chip microcomputer is arranged to: controls the first programmable power supply and regulates adjustable input matching network, and controls the second programmable power supply regulation tunable output matching network；According to the detection radio frequency input of default detector unit and/or the testing result of radio frequency output, determine target property；Regulation power amplifier output characteristics is to target property.The present invention is automatically adjusted power amplifier source impedance and load impedance by single-chip microcomputer, power amplifier output characteristics is made to reach target property, for different power tubes or different power amplifier output characteristics without redesigning input matching network and output matching network, low cost, impedance regulation is convenient.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of power amplifier impedance auto-adjusting circuit and power amplifier.
Background technology
The characteristics such as the output of power amplifier, i.e. power amplifier, efficiency, gain and the linearity are directly by power amplifier input coupling
The source impedance of network and the load impedance of output matching network determine.Therefore, the source impedance of power amplifier and load impedance result are to merit
The design put is most important.
The most direct means of assessment of power tube performance are to use load balance factor (Load pull) test system to enter at present
OK.The radio frequency instruments such as load governor (Tuner) binding signal source, driving amplifier, energy meter and frequency spectrum instrument are constituted
Load pull test system provides the source impedance of (power, efficiency, gain and the linearity etc.) under different qualities for power tube and bears
Carry impedance.The result that load balance factor test obtains is directly used in power tube Performance Evaluation and power amplifier design.But Load
Pull test system price is expensive, and a lot of companies hope and halt.Additionally, at some special occasions, need the power amplifier can be defeated
Going out different qualities, traditional power amplifier has input matching network and the output matching networking of blocked impedance, it is difficult to meet pin
The different performance of different application is switched.
Summary of the invention
In view of this, the purpose of the present invention is to propose to a kind of power amplifier impedance auto-adjusting circuit and power amplifier, automatically adjust
The source impedance of the input matching network of joint power amplifier and the load impedance of output matching network, save power tube Performance Evaluation cost,
The most this power amplifier can be automatically adjusted the output state of power amplifier as required..
For achieving the above object, the present invention adopts the following technical scheme that
On the one hand, embodiments provide a kind of power amplifier impedance auto-adjusting circuit, including single-chip microcomputer, preset detection
Unit, the first programmable power supply, adjustable input matching network, the second programmable power supply and tunable output matching network；
Described adjustable input matching network is for providing source impedance for power tube；
Described tunable output matching network is for providing load impedance for described power tube；
Described adjustable input matching network and described tunable output matching network all include mating inductance and voltage-controlled adjustable electric
Hold；
Described single-chip microcomputer is arranged to:
Control described first programmable power supply and regulate described adjustable input matching network, and control described second programmable power supply tune
Save described tunable output matching network；According to the detection radio frequency input of described default detector unit and/or the detection knot of radio frequency output
Really, target property is determined；Regulation power amplifier output characteristics is to described target property.
On the other hand, a kind of power amplifier is embodiments provided, including the power amplifier impedance described in one side face
Auto-adjusting circuit；
One end of described adjustable input matching network connects the outfan of radio frequency input coupler, and the other end is inclined by grid
Circuits is connected to the grid of power tube；
The coupled end of described radio frequency input coupler connects described first detector unit；
One end of described tunable output matching network connects the input of radio frequency output coupler, and the other end is by drain electrode partially
Circuits is connected to the drain electrode of described power tube；
The coupled end of described radio frequency output coupler connects described second detector unit.
The invention has the beneficial effects as follows: the power amplifier impedance auto-adjusting circuit of present invention offer and power amplifier, single-chip microcomputer
Control the first programmable power supply and regulate adjustable input matching network, and control the second programmable power supply regulation tunable output matching network,
I.e. single-chip microcomputer exports adjustable input matching network and adjustable output by regulating the first programmable power supply and the second programmable power supply
The voltage of distribution network, the source impedance of regulation power amplifier input matching network and the load impedance of output matching network so that power amplifier is defeated
Go out characteristic to change；According to the detection radio frequency input of default detector unit and/or the testing result of radio frequency output, determine that target is special
Property, it is automatically adjusted source impedance and the load impedance of power amplifier by the first programmable power supply and the second programmable power supply so that power amplifier exports
Characteristic reaches target property.Thus, the power amplifier impedance adjustment circuit that the present invention provides has saved power tube assessed cost, it is achieved that
To the source impedance of power tube and being automatically adjusted of load impedance.Additionally, this power amplifier can be also used for regulating power tube output
State, to adapt to different demand.
Accompanying drawing explanation
Below by describing the exemplary embodiment of the present invention in detail by referring to accompanying drawing, make those of ordinary skill in the art
Become apparent from the above-mentioned and other feature and advantage of the present invention, in accompanying drawing:
Fig. 1 is the schematic diagram of the power amplifier impedance auto-adjusting circuit that the embodiment of the present invention one provides；
Fig. 2 is the schematic diagram of the power amplifier that the embodiment of the present invention one provides；
Fig. 3 is source impedance and the load impedance of output matching network of the input matching network that the embodiment of the present invention one provides
The circuit diagram of timing signal；
Fig. 4 is the schematic diagram of the power amplifier impedance auto-adjusting circuit that the embodiment of the present invention two provides；
Fig. 5 is the schematic diagram of the power amplifier that the embodiment of the present invention two provides；
Fig. 6 is the schematic diagram of the power amplifier impedance auto-adjusting circuit that the embodiment of the present invention three provides；
Fig. 7 is the schematic diagram of the power amplifier that the embodiment of the present invention three provides.
Detailed description of the invention
Further illustrate technical scheme below in conjunction with the accompanying drawings and by detailed description of the invention.May be appreciated
It is that specific embodiment described herein is used only for explaining the present invention, rather than limitation of the invention.Further need exist for explanation
, for the ease of describing, accompanying drawing illustrate only part related to the present invention rather than entire infrastructure.
The power amplifier impedance auto-adjusting circuit of the present invention, including single-chip microcomputer, preset detector unit, the first programmable power supply, can
Adjust input matching network, the second programmable power supply and tunable output matching network.
Wherein, adjustable input matching network is for providing source impedance for power tube；Tunable output matching network is used for as merit
Put pipe and load impedance is provided；Adjustable input matching network and tunable output matching network all include mating inductance and voltage-controlled adjustable electric
Hold；Single-chip microcomputer is arranged to:
Control the first programmable power supply and regulate adjustable input matching network, and control the second programmable power supply adjustable output of regulation
Distribution network；According to the detection radio frequency input of default detector unit and/or the testing result of radio frequency output, determine target property；Regulation
Power amplifier output characteristics is to target property.
The present invention can arrange different default detector units according to different power amplifier output characteristics, provides multiple for power amplifier
Matching way, wherein, power amplifier output characteristics includes power amplifier output, power amplifier gain, the power amplifier linearity or power amplification efficiency.Specifically
Embodiment is as follows.
Embodiment one
Fig. 1 is the schematic diagram of the power amplifier impedance auto-adjusting circuit that the embodiment of the present invention one provides.Power amplifier output characteristics is
When power amplifier output or power amplifier gain, default detector unit includes the first detector unit and the second detector unit.Such as Fig. 1 institute
Showing, this power amplifier impedance auto-adjusting circuit includes single-chip microcomputer the 1, first detector unit the 2, first programmable power supply 3, adjustable input coupling
Network the 4, second detector unit the 5, second programmable power supply 6 and tunable output matching network 7.
Wherein, adjustable input matching network 4 is for providing source impedance for power tube；
Tunable output matching network 7 is for providing load impedance for power tube；
First detector unit 2 is used for detecting power amplifier input power, and the second detector unit 5 is used for detecting power amplifier output；
Adjustable input matching network 4 and tunable output matching network 7 all include mating inductance and voltage-controlled tunable capacitor.
Single-chip microcomputer 1 specifically for:
Control voltage according to multiple default source impedances, control the first programmable power supply 3 and regulate adjustable input matching network 4, with
Time according to first detector unit 2 detection power amplifier input power, and the second detector unit 5 detection power amplifier output, really
Fixed first maximum work amplification gain；
The default source impedance controlling the first programmable power supply 3 output corresponding with the first maximum work amplification gain controls voltage；
According to multiple default load impedance control voltages, control the second programmable power supply 6 and regulate tunable output matching network 7,
Simultaneously according to the power amplifier input power of the first detector unit 2 detection, and the power amplifier output of the second detector unit 5 detection,
Determine the second maximum work amplification gain or maximum power amplifier output；
Control the preset negative that the second programmable power supply 6 output is corresponding with the second maximum work amplification gain or maximum power amplifier output
Carry impedance control voltage.
Wherein, power amplifier gain can be obtained by the ratio of power amplifier output with power amplifier input power.
In the present embodiment, the first detector unit 2 and the second detector unit 5 can be all power detection module (such as energy meter),
Detection RF input power and radio frequency power output respectively；First programmable power supply 3 and the second programmable power supply 6 are controlled by single-chip microcomputer 1
Export different voltage, regulate adjustable input matching network 4 and the impedance of tunable output matching network 7 respectively, to regulate power amplifier
The source impedance of pipe and load impedance；Power amplifier input power and the second detection that single-chip microcomputer 1 detects according to the first detector unit 2 are single
The power amplifier output of unit 5 detection, records each power amplifier output and calculates the power amplifier gain that each power amplifier output is corresponding,
Target property (as maximum in power amplifier output or power amplifier gain) is determined according to record and result of calculation；Single-chip microcomputer 1 is again by adjusting
Save the first programmable power supply 3 and output voltage of the second programmable power supply 6, control power amplifier output characteristics to above-mentioned target property.
Exemplary, single-chip microcomputer 1, again by regulating the first programmable power supply 3 and output voltage of the second programmable power supply 6, controls
During power amplifier output characteristics extremely above-mentioned target property, single-chip microcomputer 1 can be according to each power amplifier output characteristics of record and the first journey
Control power supply 3 and the corresponding relation of the second programmable power supply 6 output voltage, directly regulation the first programmable power supply 3 and the second programmable power supply 6
Output voltage to the voltage the most corresponding with target property；Or, single-chip microcomputer 1 can constantly regulate the first programmable power supply 3 and the second journey
The output voltage of control power supply 6, until judging that power amplifier output characteristics reaches target property.
Further, above-mentioned voltage-controlled tunable capacitor can be the adjustable condenser of barium strontium titanate ferroelectric film composition or partly lead
The adjustable condenser that body diode is constituted.Preferably, adjustable input matching network 4 also includes being connected with the first programmable power supply 3
First choke coil, tunable output matching network 7 also includes the second choke coil being connected with the second programmable power supply 6, to prevent radio frequency
Signal enters the first programmable power supply and 3 second programmable power supplys 6.
Exemplary, as it is shown in figure 1, adjustable input matching network 4 includes the first choke coil L12, the first coupling inductance L11
With the first voltage-controlled tunable capacitor C13；Tunable output matching network 7 includes the second choke coil L22, the second coupling inductance L21 and the
Two voltage-controlled tunable capacitor C23.Above-mentioned choke coil can realize the isolation between radiofrequency signal and programmable power supply, prevents radiofrequency signal from entering
Enter programmable power supply and cause programmable power supply to damage.Above-mentioned coupling inductance can be lumped inductance element, it is possible to be microstrip line and penetrating
Frequently the modular circuit that electric capacity is constituted.It is voltage-controlled that the voltage of the first programmable power supply 3 and the output of the second programmable power supply 6 can regulate first respectively
Tunable capacitor C13 and the capacitance of the second voltage-controlled tunable capacitor C23, and then change the source resistance that adjustable input matching network 4 provides
The load impedance that anti-and tunable output matching network 7 provides.
Further, adjustable input matching network 4 can include the multistage adjustable input matching network of series connection, adjustable output
Distribution network 7 can include the multistage tunable output matching network of series connection, and now, the first programmable power supply 3 includes and adjustable inputs at different levels
The first sub-programmable power supply that matching network is corresponding, the second programmable power supply 6 includes corresponding with tunable output matching network at different levels
Two sub-programmable power supplys.Thus, the bandwidth of adjustable input matching network 4 and tunable output matching network 7 can be increased, expand source impedance
Range of accommodation with load impedance.
It addition, Fig. 2 is the schematic diagram of the power amplifier that the embodiment of the present invention one provides.As in figure 2 it is shown, this power amplifier bag
Include the power amplifier impedance auto-adjusting circuit in this enforcement.One end of adjustable input matching network 4 connects radio frequency input coupler 11
Outfan, the other end is connected to the grid of power tube 8 by gate bias circuit 9；The coupled end of radio frequency input coupler 11
Connect the first detector unit 2；One end of tunable output matching network 7 connects the input of radio frequency output coupler 12, the other end
The drain electrode of power tube 8 it is connected to by drain bias circuit 10；It is single that the coupled end of radio frequency output coupler 12 connects the second detection
Unit 5.
Exemplary, as in figure 2 it is shown, above-mentioned gate bias circuit 9 can include the first bias inductors L1 and the first biased electrical
Holding C1, external power source provides gate bias voltage VGG；Drain bias circuit 10 can include the second bias inductors L2 and the second biasing
Electric capacity C2, external power source provides drain bias voltage VDD.Concrete, one end of the first partially installing capacitor C1 connects the first coupling electricity
Sense L11, the other end connects grid and one end of the first bias inductors L1 of power tube 8, and the other end of the first bias inductors L1 is even
Meet gate bias voltage VGG；One end of second partially installing capacitor C2 connects the second coupling inductance L21, and the other end connects power tube 8
Drain electrode and one end of the second bias inductors L2, the other end of the second bias inductors L2 connects drain bias voltage VDD.Gate bias
Circuit 9 and drain bias circuit 10 provide quiescent biasing state for power tube 8.The power tube 8 of the present embodiment can be to have encapsulation
The transistor of shell or there is the amplification module of transistor.
It should be noted that single-chip microcomputer 1 is when getting power amplifier input power and power amplifier output, need to be defeated according to radio frequency
Enter bonder 11 and the degree of coupling of radio frequency output coupler 12, calculate the power amplifier input power before coupling and power amplifier output work
Rate.
The power amplifier that the embodiment of the present invention one provides hinders automatic anti-regulation circuit and power amplifier, and Single-chip Controlling first is program control
Power supply regulate adjustable input matching network, and control second programmable power supply regulation tunable output matching network, i.e. single-chip microcomputer pass through
Regulate the first programmable power supply and the second programmable power supply export the voltage of adjustable input matching network and tunable output matching network,
The source impedance of the regulation adjustable input matching network of power tube and the load impedance of tunable output matching network so that power amplifier output spy
Property changes；Power amplifier input power according to the first detector unit detection and the power amplifier output work of the second detector unit detection
Rate, determines target property, is automatically adjusted source impedance and the load resistance of power tube by the first programmable power supply and the second programmable power supply
Anti-so that power amplifier output characteristics reaches target property.Thus, present invention saves power tube assessed cost, it is achieved that to power amplifier
Source impedance and being automatically adjusted of load impedance.
Further, single-chip microcomputer 1 is provided with the difference demarcated in advance and presets the source impedance under source impedance voltage, and different
Preset the load impedance under load impedance voltage；
Accordingly, single-chip microcomputer 1 is additionally operable to:
Target property and the source impedance of correspondence and load impedance are exported to display device.
Exemplary, by Network Analyzer, difference can be preset the source under difference controls voltage of input matching network
Impedance, and different output matching network load impedance under different voltages of presetting demarcates.Concrete, as it is shown on figure 3,
Signal source 14 is connected to the input of radio frequency input coupler 11, by a survey of Network Analyzer 13 by driving amplifier 15
Amount port is connected with gate bias circuit 9, and another measurement port is connected with drain bias circuit 10.Wherein, signal source 14 is used for
Producing radio-frequency input signals needed for power amplifier, driving amplifier 15 is used for amplifying radio-frequency input signals, provides sufficiently large for power tube
Input power.In the case of signal source inactivity exports, control voltage by single-chip microcomputer 1 according to multiple default source impedances,
Regulate the output voltage of the first programmable power supply 3 successively, recorded under the first each output voltage of programmable power supply 3 by Network Analyzer 13
The source impedance of input matching network, is stored in single-chip microcomputer 1 by the first each output voltage of programmable power supply 3 with corresponding source impedance.Lead to again
Cross single-chip microcomputer 1 according to multiple default load impedance control voltages, regulate the output voltage of the second programmable power supply 6 successively, by net
Network analyser 13 records the load impedance of output matching network under the second each output voltage of programmable power supply 6, by the second programmable power supply 6
Each output voltage is stored in single-chip microcomputer 1 with corresponding load impedance.
In the present embodiment, power amplifier output characteristics regulation to maximum power amplifier output or maximum power amplifier are being increased by single-chip microcomputer 1
After benefit, maximum power amplifier output or maximum work amplification gain and the source impedance of correspondence and load impedance are exported to display device,
Thus, can realize power tube Performance Evaluation.
Embodiment two
Fig. 4 is the schematic diagram of the power amplifier impedance auto-adjusting circuit that the embodiment of the present invention two provides.As shown in Figure 4, this reality
The difference granting embodiment one is: power amplifier output characteristics is the power amplifier linearity, and default detector unit includes the first detection
Unit the 2, second detector unit 5 and the 3rd detector unit 16.
First detector unit 2 is used for detecting power amplifier input power, and the second detector unit 5 is used for detecting power amplifier output,
3rd detector unit 16 is for carrying out frequency domain detection analysis to the output signal of power amplifier；
Single-chip microcomputer 1 specifically for:
Control voltage according to multiple default source impedances, control the first programmable power supply 3 and regulate adjustable input matching network 4, with
Time according to first detector unit 2 detection power amplifier input power, and the second detector unit 5 detection power amplifier output, really
Fixed first maximum work amplification gain；
The default source impedance controlling the first programmable power supply 3 output corresponding with the first maximum work amplification gain controls voltage；
According to multiple default load impedance control voltages, control the second programmable power supply 6 and regulate tunable output matching network 7,
Simultaneously analyze, according to the 3rd detector unit 16 detection, the frequency domain data that output signal obtains, determine minimum third order intermodulation distortion or
Little ACLR, wherein, third order intermodulation distortion or ACLR are the least, and the power amplifier linearity is the best；
Control the default load that the second programmable power supply 6 output is corresponding with minimum third order intermodulation distortion or minimum ACLR
Impedance control voltage.
Wherein, the 3rd detector unit 16 can be frequency domain detection module (such as spectrum analyzer), third order intermodulation distortion and neighbour
Road leakage ratio directly can be measured by frequency domain detection module.
Thus, power amplifier impedance auto-adjusting circuit and the power amplifier of the offer of the present embodiment can be automatically obtained input coupling
Network source impedance and output matching network load impedance adjustment, it is achieved the linearity assessment of power tube.
It addition, Fig. 5 is the schematic diagram of the power amplifier that the embodiment of the present invention two provides.The power amplifier of the present embodiment and reality
Execute the distinctive points of example one, identical with the distinctive points of embodiment one with the power amplifier impedance adjustment circuit of the present embodiment, the most superfluous
State.Further, it is connected between the 3rd detector unit 16 and radio frequency output coupler 12 and has attenuator 17, bigger to prevent
Output damages the 3rd detector unit 16.
The power amplifier impedance auto-adjusting circuit of the present embodiment offer and power amplifier, single-chip microcomputer is by regulating the first program-controlled electric
Source and the second programmable power supply export the voltage of adjustable input matching network and tunable output matching network, the source resistance of regulation power amplifier
Resist and load impedance so that the power amplifier linearity changes；The frequency domain of the power amplifier output signal according to the 3rd detector unit detection
Data, determine minimum third order intermodulation distortion or minimum ACLR, automatic by the first programmable power supply and the second programmable power supply
The source impedance of regulation power amplifier and load impedance so that the output signal of power amplifier has minimum third order intermodulation distortion or minimum neighboring trace is let out
Leakage ratio, obtains the best power amplifier linearity.Thus, present invention saves power amplifier assessed cost, it is achieved that to the source impedance of power amplifier and
Being automatically adjusted of load impedance.
Embodiment three
Fig. 6 is the schematic diagram of the power amplifier impedance auto-adjusting circuit that the embodiment of the present invention three provides.As shown in Figure 6, this reality
The difference granting embodiment one is: power amplifier output characteristics is power amplification efficiency.Default detector unit includes the first detection list
Unit's the 2, second detector unit 5 and the 4th detector unit 18.
First detector unit 2 is used for detecting power amplifier input power, and the second detector unit 5 is used for detecting power amplifier output,
4th detector unit 18 is for detecting drain bias voltage and the drain bias electric current of power amplifier；
Single-chip microcomputer 1 specifically for:
Control voltage according to multiple default source impedances, control the first programmable power supply 3 and regulate adjustable input matching network 4, with
Time according to first detector unit 2 detection power amplifier input power, and the second detector unit 5 detection power amplifier output, really
Fixed first maximum work amplification gain；
The default source impedance controlling the first programmable power supply 3 output corresponding with the first maximum work amplification gain controls voltage；
According to multiple default load impedance control voltages, control the second programmable power supply 6 and regulate tunable output matching network 7,
Examine according to the drain bias voltage of power amplifier, drain electrode average current and second detector unit 5 of the 4th detector unit 18 detection simultaneously
The power amplifier output surveyed, determines maximum power amplification efficiency (power tube drain efficiency)；Concrete, single-chip microcomputer 1 can be according to following public affairs
Formula calculates power amplification efficiency:
Wherein, η is power amplification efficiency, PoutFor power amplifier output, VDD is the drain bias voltage of power amplifier, and IDD is power amplifier
Drain electrode average current；
Control the default load impedance voltage that the second programmable power supply 6 output is corresponding with maximum power amplification efficiency.
Thus, the scheme of the present embodiment can be according to pre-set power amplifier work state, according to maximum power amplifier output work
Rate, maximum work amplification gain or maximum power amplification efficiency, the source impedance of regulation power amplifier and load impedance, it is achieved that be different from embodiment one
Power amplifier output characteristics power amplifier coupling.
It addition, Fig. 7 is the schematic diagram of the power amplifier that the embodiment of the present invention three provides.The power amplifier of the present embodiment and reality
Execute the distinctive points of example one, identical with the distinctive points of embodiment one with the power amplifier impedance adjustment circuit of the present embodiment, the most superfluous
State.
The power amplifier impedance auto-adjusting circuit of the present embodiment offer and power amplifier, single-chip microcomputer is by regulating the first program-controlled electric
Source and the second programmable power supply export the voltage of adjustable input matching network and tunable output matching network, the source resistance of regulation power amplifier
Resist and load impedance so that power amplification efficiency changes；The drain bias voltage of power amplifier according to the 4th detector unit detection, leakage
Pole bias current and the power amplifier output of the second detector unit detection, determine maximum power amplification efficiency, by the first programmable power supply
With source impedance and the load impedance that the second programmable power supply is automatically adjusted power amplifier so that power amplification efficiency reaches maximum.Thus, the present invention
Save power tube assessed cost, it is achieved that to the source impedance of power amplifier and being automatically adjusted of load impedance.
It should be noted that when actual power amplifier impedance auto-adjusting circuit and power amplifier design, preset detector unit
Can include the first detector unit, the second detector unit, the 3rd detector unit and the 4th detector unit simultaneously, thus, can be according in advance
First setting power amplifier work state, input and output state according to power amplifier are automatically adjusted adjustable input matching network and provide
Source impedance and tunable output matching network provide load impedance, it is achieved different power amplifier output characteristics, different to meet
Work requirements.
Note, above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art various obvious change,
Readjust and substitute without departing from protection scope of the present invention.Therefore, although by above example, the present invention is carried out
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
Other Equivalent embodiments more can be included, and the scope of the present invention is determined by scope of the appended claims.
Claims (10)
1. a power amplifier impedance auto-adjusting circuit, it is characterised in that include single-chip microcomputer, preset detector unit, the first program-controlled electric
Source, adjustable input matching network, the second programmable power supply and tunable output matching network；
Described adjustable input matching network is for providing source impedance for power tube；
Described tunable output matching network is for providing load impedance for described power tube；
Described adjustable input matching network and described tunable output matching network all include mating inductance and voltage-controlled tunable capacitor；
Described single-chip microcomputer is arranged to:
Control described first programmable power supply regulate described adjustable input matching network, and control described second programmable power supply regulation institute
State tunable output matching network；According to the detection radio frequency input of described default detector unit and/or the testing result of radio frequency output, really
Set the goal characteristic；Regulation power amplifier output characteristics is to described target property.
Circuit the most according to claim 1, it is characterised in that described power amplifier output characteristics includes power amplifier output, merit
Amplification gain, the power amplifier linearity or power amplification efficiency.
Circuit the most according to claim 2, it is characterised in that described power amplifier output characteristics is power amplifier output or power amplifier
During gain, described default detector unit includes the first detector unit and the second detector unit；
Described first detector unit is used for detecting power amplifier input power, and described second detector unit is used for detecting power amplifier output work
Rate；
Described single-chip microcomputer specifically for:
Control voltage according to multiple default source impedances, control described first programmable power supply and regulate described adjustable input matching network,
Simultaneously according to the power amplifier input power of described first detector unit detection, and the power amplifier output of described second detector unit detection
Power, determines the first maximum work amplification gain；
The default source impedance controlling described first programmable power supply output corresponding with described first maximum work amplification gain controls voltage；
According to multiple default load impedance control voltages, control described second programmable power supply and regulate described adjustable output matching net
Network, simultaneously according to the power amplifier input power of described first detector unit detection, and the power amplifier of described second detector unit detection
Output, determines the second maximum work amplification gain or maximum power amplifier output；
Control described second programmable power supply output and described second maximum work amplification gain or maximum corresponding pre-of power amplifier output
If load impedance controls voltage.
Circuit the most according to claim 2, it is characterised in that when described power amplifier output characteristics is the power amplifier linearity, described
Default detector unit includes the first detector unit, the second detector unit and the 3rd detector unit；
Described first detector unit is used for detecting power amplifier input power, and described second detector unit is used for detecting power amplifier output work
Rate, described 3rd detector unit is analyzed for the output signal of described power amplifier carries out frequency-region signal detection；
Described single-chip microcomputer specifically for:
Control voltage according to multiple default source impedances, control described first programmable power supply and regulate described adjustable input matching network,
Simultaneously according to the power amplifier input power of described first detector unit detection, and the power amplifier output of described second detector unit detection
Power, determines the first maximum work amplification gain；
The default source impedance controlling described first programmable power supply output corresponding with described first maximum work amplification gain controls voltage；
According to multiple default load impedance control voltages, control described second programmable power supply and regulate described adjustable output matching net
Network, analyzes, according to described 3rd detector unit detection, the frequency domain data that described output signal obtains simultaneously, determines that minimum three rank are mutual
Adjusting distortion or minimum ACLR, wherein, third order intermodulation distortion or ACLR are the least, and the power amplifier linearity is the best；
Control described second programmable power supply output and described minimum third order intermodulation distortion or corresponding the presetting of minimum ACLR
Load impedance controls voltage.
Circuit the most according to claim 2, it is characterised in that when described power amplifier output characteristics is power amplification efficiency, described pre-
If detector unit includes the first detector unit, the second detector unit and the 4th detector unit；
Described first detector unit is used for detecting power amplifier input power, and described second detector unit is used for detecting power amplifier output work
Rate, described 4th detector unit is for detecting drain bias voltage and the drain electrode average current of described power amplifier；
Described single-chip microcomputer specifically for:
Control voltage according to multiple default source impedances, control described first programmable power supply and regulate described adjustable input matching network,
Simultaneously according to the power amplifier input power of described first detector unit detection, and the power amplifier output of described second detector unit detection
Power, determines the first maximum work amplification gain；
The default source impedance controlling described first programmable power supply output corresponding with described first maximum work amplification gain controls voltage；
According to multiple default load impedance control voltages, control described second programmable power supply and regulate described adjustable output matching net
Network, simultaneously according to the drain bias voltage of described power amplifier of described 4th detector unit detection, drain electrode average current and described the
The power amplifier output of two detector unit detections, determines maximum power amplification efficiency；
Control the default load impedance control voltage that described second programmable power supply output is corresponding with described maximum power amplification efficiency.
6. according to the arbitrary described circuit of claim 3-5, it is characterised in that described single-chip microcomputer is provided with demarcate in advance adjustable
Input matching network is preset source impedance in difference and is controlled the source impedance under voltage, and tunable output matching network is preset in difference
Load impedance controls the load impedance under voltage；
Described single-chip microcomputer is additionally operable to:
Described target property and the source impedance of correspondence and load impedance are exported to display device.
Circuit the most according to claim 1, it is characterised in that described adjustable input matching network also includes and described first
The first choke coil that programmable power supply connects, described tunable output matching network also include being connected with described second programmable power supply the
Two choke coils, to prevent radiofrequency signal from entering described first programmable power supply and described second programmable power supply.
Circuit the most according to claim 1, it is characterised in that described adjustable input matching network includes that the multistage of series connection can
Adjusting input matching network, described tunable output matching network includes the multistage tunable output matching network of series connection, described first journey
Control power supply include the first sub-programmable power supply corresponding with adjustable input matching networks at different levels, described second programmable power supply include with respectively
The second sub-programmable power supply that level tunable output matching network is corresponding.
9. a power amplifier, it is characterised in that include that the power amplifier impedance described in any one of claim 1-8 is automatically adjusted electricity
Road；
One end of described adjustable input matching network connects the outfan of radio frequency input coupler, and the other end is by gate bias electricity
Road is connected to the grid of power tube；
The coupled end of described radio frequency input coupler connects described first detector unit；
One end of described tunable output matching network connects the input of radio frequency output coupler, and the other end is by drain bias electricity
Road is connected to the drain electrode of described power tube；
The coupled end of described radio frequency output coupler connects described second detector unit.
Circuit the most according to claim 9, it is characterised in that described power tube be have encapsulating package transistor or
Amplification module including transistor.
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| CN201610503809.5A CN106253863A (en) | 2016-06-30 | 2016-06-30 | A kind of power amplifier impedance auto-adjusting circuit and power amplifier |
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| CN201610503809.5A CN106253863A (en) | 2016-06-30 | 2016-06-30 | A kind of power amplifier impedance auto-adjusting circuit and power amplifier |
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| CN201610503809.5A Pending CN106253863A (en) | 2016-06-30 | 2016-06-30 | A kind of power amplifier impedance auto-adjusting circuit and power amplifier |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108539991A (en) * | 2018-06-12 | 2018-09-14 | 深圳半岛医疗有限公司 | Intelligent digital medical treatment power supply |
| CN111371416A (en) * | 2020-03-18 | 2020-07-03 | 锐石创芯（深圳）科技有限公司 | Bias network capable of switching output impedance, control method and power amplifier system |
| WO2021227328A1 (en) * | 2020-05-13 | 2021-11-18 | 广州慧智微电子有限公司 | Impedance regulating circuit and method, and bias circuit structure and amplifier |
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| CN108539991A (en) * | 2018-06-12 | 2018-09-14 | 深圳半岛医疗有限公司 | Intelligent digital medical treatment power supply |
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| CN111371416B (en) * | 2020-03-18 | 2024-04-30 | 锐石创芯(深圳)科技股份有限公司 | Bias network capable of switching output impedance, control method and power amplifier system |
| WO2021227328A1 (en) * | 2020-05-13 | 2021-11-18 | 广州慧智微电子有限公司 | Impedance regulating circuit and method, and bias circuit structure and amplifier |
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Application publication date: 20161221 |