CN205921561U - High efficiency low -harmonic -wave's power amplifier and mobile terminal thereof - Google Patents
High efficiency low -harmonic -wave's power amplifier and mobile terminal thereof Download PDFInfo
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- CN205921561U CN205921561U CN201620853777.7U CN201620853777U CN205921561U CN 205921561 U CN205921561 U CN 205921561U CN 201620853777 U CN201620853777 U CN 201620853777U CN 205921561 U CN205921561 U CN 205921561U
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Abstract
The utility model discloses a high efficiency low -harmonic -wave's power amplifier and mobile terminal thereof, the amplifier circuit who utilizes at least one -level connects with the cascade system, the regulation that can gain at the radio frequency that different power output required to realize down power amplifier through the nimble offset voltage who disposes each the unit amplifying unit among the amplifier circuit at different levels or bias current, the brand -new design of load simultaneously can reach second item harmonic to the optimization of the tenth harmonic and the optimization of amplifier and module efficiency. This kind of flexibility and efficient power amplifier design can be applied to among the power amplification who needs low -harmonic -wave's demand among the any wireless connection of thing networking uses to can realize the high performance under multiple communication standard, thereby realize the regulation of power amplifier's power mode and harmonic and satisfy the demand of multiple communication standard in the thing networking.
Description
Technical field
This utility model is related to Design of RF Power Amplifier technical field, specifically a kind of high-efficiency and low-harmonic
Multimode power amplifier and its mobile terminal.
Background technology
Radio-frequency transmissions front-end module is the key componentses that signal transmission realized by rf terminal device.Currently with the whole world no
The rapid growth of the line communication user and user more high-end demand for experience to radio communication, market is to the bandwidth of radio communication
Demand rapid growth.In the frequency range of mobile phone wireless communication, mostly adopt the high modulation demodulation system of frequency range utilization rate, for example:
The WCDMA (wideband code division multiple access, wcdma) of 3g, carries CDMA
(code division multiple access, cdma), TD SDMA (time division
Synchronous code division multiple access, td-scdma), and gradually replacement 3g technology becomes city
The long term evolution of the 4g technology of field main flow, lte include paired spectrum pattern (frequency domain
Duplexing, fdd) and non-paired spectrum mode (time domain duplexing, tdd).
In other wireless communication fields, such as man-machine interaction, Machine To Machine (m2m), intelligent grid, intelligent electric meter, intelligence
Can water meter, smart city, in the application of smart home etc. trillion Internet of Things, have more radio frequency bands and corresponding its
Its more modulation demodulation mode all proposes higher requirement to wireless communication terminal, for example: intelligent grid, intelligent electric meter water meter
Conventional frequency range high frequency (very high frequency, vhf), hyperfrequency (ultra-high frequency, uhf), industrial section
Learn Medical band (industrial scientific medical, ism), the modulation demodulation system of zigbee is usually used.
One of Internet of Things example is intelligent grid, the uhf frequency of conventional 433mhz-470mhz in intelligent electric meter water meter
Rate, its two frequency multiplication and quadruple will just fall in mobile phone wireless rf frequency, lead to reduce Internet of Things wireless data
Interference to other terminals such as cellphone subscriber in letter, therefore has much to the harmonic wave of cellular power amplifier generally in Internet of Things
Require.
In addition power amplifier must have the higher linearity and can amplify transmission and can ensureing radiofrequency signal
Lack distorted signals as far as possible.The high linearity of general power amplifier means to reduce its output to reduce output transistor device
The generation of the non-linear harmonic wave of part, which results in power amplifier and can not be operated in its high-output power and peak efficiency area
Between.
Additionally due to mobile radio terminal can lead to it to receipt signal strength demand with the distance change of signal source
Change, typically when needing high power at a distance, efficiency of RF power amplifier is higher, when closer distance needs lower-wattage
Efficiency power amplifier is relatively low.Relatively low efficiency of amplitude can lead to wireless terminal to generate heat, and seriously consumes the electricity of battery.
Therefore, the power amplifier in Internet of Things also should be using multimode power amplifier and it needs to be the inclined of radio-frequency power amplifier
Circuits design at least two or two or more patterns make under different output power, and radio-frequency power amplifier has higher
Efficiency.
Market existing Internet of Things radio-frequency power amplifier and comprise this power amplifier RF front-end module main
Have following two.The two stage power amplifier 102/103 that Fig. 1 shows represent respectively radio frequency amplify path in the first order and
Second level amplifier unit, 101 represent amplifier control circuit, and 104/105/106/107/108/109/110 representative load is defeated
Go out the impedance unit in match circuit.Radiofrequency signal is amplified by output matching circuit 104/105/ through 102/103
106/107/108/109/110 optimized is transferred to antenna 111.Wherein 106 and 107 one wave filter of composition, 109 and 110
Form another wave filter.The program, because being the design of single mode power amplifier, therefore cannot accomplish to control power output
Scalable is it is impossible to optimize efficiency under different output power for this amplifier；Additionally since only two wave filter be integrated in negative
Carry match circuit in, therefore its harmonics level higher it is difficult to ensure second harmonic all can reach relatively low level to ten subharmonic.
Fig. 2 is shown that another kind of common Internet of Things radio-frequency power amplifier in market and its module, 202/203 generation respectively
Table radio frequency amplifies the first order and second level amplifier unit in path, and 201 represent amplifier control circuit, and 204/205/
206/207/208/209/210/211/212 represents the impedance unit in load output matching circuit.Radiofrequency signal is through 202/
203 are amplified by that output matching circuit 204/205/206/207/208/209/210/211/212 is optimized to be transferred to
Antenna 213.Wherein 204 and 205 one wave filter of composition, 208 and 209 second wave filter of composition, 211 and 212 compositions the 3rd
Individual wave filter.In harmonics level, the program is better than the scheme shown in figure one, but the program is because be to be equally single mode power amplification
The design of device, therefore cannot accomplish to control the scalable of power output it is difficult to accomplish all to reach under different output power efficiently
Rate.
The power amplifier of both the above scheme typically adopts the technique of gaas hbt, and power-mode control circuitry is typically
Cmos technique, output matching circuit can adopt passive discrete component, semiconductor passive device or the combination of the two.
Content of the invention
This utility model is to solve above-mentioned the shortcomings of the prior art, there is provided a kind of integrated level is higher, more
The multimode power amplifier of flexible high-efficiency and low-harmonic and its mobile terminal, to simplifying radio frequency in Internet of Things radio communication
Amplifier and its structure design of module, thus realizing the scalable of the power mode of power amplifier, to meet Internet of Things with this
The demand of the multiple communication standard of net radio communication.
This utility model is to solve technical problem to adopt the following technical scheme that
A kind of multimode power amplifier of high-efficiency and low-harmonic of this utility model, comprising: m level Cascaded amplification circuit and output
Match circuit；N is comprised in the amplifying circuit of i-th cascade of described m level Cascaded amplification circuitiThe individual unit being connected in parallel is amplified
Unit；1≤i≤m and m >=2；
The input of the amplifying circuit from i-th of described m level Cascaded amplification circuit cascade for the radiofrequency signal into and through
niAfter the individual amplification of unit amplifying unit being connected in parallel, then the input of the amplifying circuit exporting to i+1 cascade is carried out
Amplify, after the amplification through the amplifying circuit of m-th cascade, obtain Cascaded amplification signal and pass to described output matching
Circuit；
Described output matching circuit exports to antenna after described Cascaded amplification signal is carried out with load optimized coupling, its feature
It is:
Described output matching circuit be by the first impedance z1, the second impedance z2, the 3rd impedance z3, the 4th impedance z4, the 5th
Impedance z5, the 6th impedance z6, the 7th impedance z7 and the 8th impedance z8 composition；
One end of described first impedance z1 is connected with the outfan of described multimode power amplifier, for receiving described cascade
Amplify signal, the other end has, with the second impedance z2 and the 4th impedance z4, the node a being jointly connected；Described second impedance z2's is another
One end is connected with one end of the 3rd impedance z3, described 3rd impedance z3 other end ground connection, described second impedance z2 and the 3rd impedance
Z3 collectively forms first harmonic wave filter；One end of described 4th impedance z4 is connected with power supply, the other end and the first impedance z1 and
Second impedance z2 is connected in described node a；Common end after described 5th impedance z5 and the 6th impedance z6 parallel connection is also connected to
Described node a, the other end after parallel connection is connected to node b, and described 5th impedance z5 and the common shape of the 6th impedance z6 constitute second
Harmonic filter；One end of described 7th impedance z7 is connected to described node b, and the other end is followed by through described 8th impedance z8
Ground, described 7th impedance z7 and the 8th impedance z8 collectively forms the 3rd harmonic filter；Described node b is connected with antenna.
The feature of multimode power amplifier described in the utility model lies also in, and described output matching circuit is to be hindered by first
Anti- z1, the second impedance z2, the 3rd impedance z3, the 4th impedance z4, the 5th impedance z5, the 6th impedance z6, the 7th impedance z7, the 8th resistance
Anti- z8, the 9th impedance z9 and the tenth impedance z10 form；
One end of described first impedance z1 is connected with the outfan of described multimode power amplifier, for receiving described cascade
Amplify signal, and form receiving node a, the other end passes through the second impedance z2 ground connection, described first impedance z1 and the second impedance z2
Collectively form first harmonic wave filter；One end of described 3rd impedance z3 is connected with power supply, and the one of the other end and the 4th impedance z4
End is connected in described receiving node a jointly；The described other end of the 4th impedance z4 and one end of the 5th impedance z5 are connected in node
b；The other end of described 5th impedance z5 passes through the 6th impedance z6 ground connection, and described 5th impedance z5 and the 6th impedance z6 collectively forms
Second harmonic wave filter；Common end after described 7th impedance z7 and the 8th impedance z8 parallel connection is also connected to described node b, and
The common other end after connection is connected to node c, and described 7th impedance z7 and the 8th impedance z8 collectively forms third harmonic wave filter；
One end of described 9th impedance z9 connects described node c, and the other end is grounded after described tenth impedance z10, described 9th resistance
Anti- z9 and the tenth impedance z10 collectively forms the 4th harmonic filter；Described node c is connected with antenna；
Described multimode power amplifier constitutes multimode power amplification module with power-mode control circuitry；
Described power-mode control circuitry accordingly controls the cascade of m level to put by m group bias voltage or bias current respectively
The power of big circuit；I-th group of bias voltage or bias current comprise niIndividual bias voltage or bias current simultaneously accordingly control niIndividual simultaneously
The power of the unit amplifying unit that connection connects, thus realize the output mode of multiple power；And with described output matching circuit
The low harmony wave output of multiple power realized by multiple harmonic filters.
Described output matching circuit is applied in two stage power amplifier.
A kind of feature of mobile terminal is: described mobile terminal has described multimode power amplifier.
Compared with the prior art, this utility model has the beneficial effect that:
1st, market such scheme is substantially the design of single mode power amplifier, and the optimization of its efficiency is only that this power is put
The maximum service rating of big device, each the relatively low output situation that may need in actual applications under this power
Under, the efficiency far of this amplifier fails to reach optimization；
And this utility model is applied in Internet of Things radio communication using the design of multimode power amplifier, this utility model
In enabling every grade this unique amplifier circuit be issued in different output power configurable.In high-power output, radio frequency
Signal, after the amplification of m level Cascaded amplification circuit, obtains Cascaded amplification signal and passes to output matching circuit.In middle power
Or during low-power output, radiofrequency signal is through the n of m level Cascaded amplification circuitiOne of the individual unit amplifying unit being connected in parallel
Divide (such as ni/ 2, ni/ 3, ni/ 4 ... etc.), after amplifying, obtain Cascaded amplification signal and pass to output matching circuit.Due to
Radiofrequency signal is merely through niThe part amplification of the individual unit amplifying unit being connected in parallel, niThe individual unit being connected in parallel is amplified single
The remainder of unit is turned off, so as to reach the scalable of the output to this utility model power amplifier.This put
Big device is in the inside of amplifier circuit at different levels to the regulation of power, thus different outputs is not needed unnecessary
Amplifier circuit；Thus ensure that this multimode power amplifier chip area less, integrated level is higher, and cost is lower.Simultaneously
This amplifier can optimize the efficiency of amplifier to the regulation of power, in the practical application of Internet of Things radio communication, due to
Mobile radio terminal can lead to it that receipt signal strength demand is changed with the distance change of signal source, typically remote
Need high power, need lower-wattage in closer distance, and multimode power amplifier efficiency of the present utility model can be various
Output is all likely to be breached optimization.
2nd, the above-mentioned load matching circuit in market scheme only carries out very limited harmonic controling to this power amplifier, and it is multiple
Harmonic effect fails to reach optimization；
And this utility model is applied in Internet of Things radio communication using the design of multimode power amplifier, assist simultaneously with
The design of brand-new load matching circuit, a kind of output matching circuit designed by this utility model is applied as shown in Figure 1
Existing design on, obtain new departure as shown in Figure 3, by the electricity of another kind of output matching designed by this utility model
Road is applied in existing design as shown in Figure 2, obtains new departure as shown in Figure 4, this utility model is existing
Added a harmonic filter, such design not only optimizes effect under multiple outputs for the amplifier in design
Rate, also can optimize harmonic wave under multiple outputs for this power amplifier simultaneously, add new the changing to load matching circuit
Enter, thus greatly reducing the generation of the harmonic wave of this amplifier product.
3rd, using the mobile terminal in existing scheme on market, every grade needs multiple power amplifier circuits to realize difference
The conversion of power mode, and harmonic wave can not optimize.And low harmony wave multimode power amplifier of the present utility model, movement can be made
Terminal reduces area/volume, thus saving the cost of mobile terminal.
Brief description
Fig. 1 is a kind of two stage power amplifier principle figure in prior art；
Fig. 2 is a kind of two stage power amplifier principle figure in prior art；
Fig. 3 is that a kind of low harmony wave of this utility model loads output matching circuit schematic diagram；
Fig. 4 is this utility model another kind low harmony wave load output matching circuit schematic diagram；
Fig. 5 is this utility model many power low harmony wave dual-stage amplifier schematic diagram；
Fig. 6 is this utility model another kind many power low harmony wave dual-stage amplifier schematic diagram.
Specific embodiment
Below in conjunction with the accompanying drawings this utility model is described in further detail.
In front already described and market Internet of Things radio communication, existing scheme is the design of single mode power amplifier, and this amplifier exists
Work under fixing output, certain efficiency can be reached, existing load design has certain harmonic.Many in needs
In the system of power output, need multiple similar to power amplifier as shown in Figure 1 or 2, for example needing three outputs
In the system of power, it is respectively necessary for three products similar to Fig. 1 or Fig. 2 and represents high power/middle power/lower powered radio frequency putting
Big path.For example using high power amplifier during high-power output, using low power amplifier during low-power output.These three are defeated
Go out path each independent, the program, because using three power amplifiers, considerably increases the area of module and the one-tenth of product
This.The integrated performance of this circuit is relatively low.
It is different from the common power amplifier of existing Internet of Things wireless communications market and be single mode power amplifier, this enforcement
In example, a kind of multimode power amplifier of high-efficiency and low-harmonic, the amplifying circuit using at least one-level connects in cascaded fashion, leads to
Cross the bias voltage of each unit amplifying unit in flexible configuration amplifying circuit at different levels or bias current can be in different capacity
The regulation of the rf gain of power amplifier is realized in output under requiring, the brand-new design simultaneously loading can reach humorous to Section 2
The optimization to Section 10 harmonic wave for the ripple and the optimization of amplifier and its module efficiency.This flexibly and efficiently power amplifier sets
Meter scheme can apply to Internet of Things any wireless connect in need low harmony wave demand power amplification application among, and
High-performance can be realized under multiple communication standards.Specifically, this multimode power amplifier includes: m level Cascaded amplification circuit and
Output matching circuit；N is comprised in the amplifying circuit of i-th cascade of m level Cascaded amplification circuit thereiniThe individual list being connected in parallel
Position amplifying unit；1≤i≤m and m >=2；
The input of the amplifying circuit of i-th cascade from m level Cascaded amplification circuit for the radiofrequency signal is into and through niIndividual
After the amplification of unit amplifying unit being connected in parallel, then the input of the amplifying circuit exporting to i+1 cascade is amplified,
After the amplification through the amplifying circuit of m-th cascade, obtain Cascaded amplification signal and pass to described output matching circuit；
The output matching circuit of this utility model multimode power amplifier carries out load optimized coupling to Cascaded amplification signal
After export to antenna.Using m level Cascaded amplification circuit, wherein i-th Cascaded amplification during high-power output in the existing scheme of market
Device contains niThe individual unit amplifying unit being connected in parallel；Using m level Cascaded amplification circuit during low-power output, wherein i-th
Cascade amplifier contains njThe individual unit amplifying unit being connected in parallel.Wherein niAnd njIt is belonging respectively to different amplifier circuits.
The every one-level amplifying circuit in m level Cascaded amplification circuit in multimode power amplifier of the present utility model is all only to be put with one
The design of big device, this amplifier contains niThe individual unit amplifying unit being connected in parallel.Using whole n during high-power outputiIndividual simultaneously
The unit amplifying unit that connection connects；During low-power output, choose niNj unit in the individual unit amplifying unit being connected in parallel
Amplifying unit thus ensure that this multimode power amplifier chip area less, integrated level is higher, and cost is lower.
Market above-mentioned load matching circuit scheme only carries out very limited harmonic controling to this power amplifier, and it is repeatedly humorous
Ripple filter effect fails to reach optimization.It is different from the load matched of the common power amplifier of existing Internet of Things wireless communications market
Circuit design, in the present embodiment, Designing power amplifier is applied in Internet of Things channel radio using the design of multimode power amplifier
In letter, assist with the design of brand-new load matching circuit, such as Fig. 3 is that this utility model is based on the existing design side in market simultaneously
The improvement of case Fig. 1, Fig. 4 is the improvement based on existing design Fig. 2 in market for this utility model.This utility model is existing
Added a harmonic filter, this harmonic filter is not affecting radiofrequency signal visible load matched basis in design
On, add a function to harmonic frequency reflection, such as 308 in Fig. 3 and 309；In Fig. 4 410 and 411.Lead to simultaneously
Cross the scalable to power amplifier it is also possible to optimize the generation of harmonic wave under certain output for this power amplifier.
Such design not only optimizes efficiency under multiple outputs for the amplifier, also can optimize this power amplifier many simultaneously
Harmonic wave under individual output, adds the new improvement to load matching circuit simultaneously, thus greatly reduce this amplifier producing
The generation of the harmonic wave of product.
Fig. 5 for a kind of high-efficiency and low-harmonic multimode power amplifier of the present utility model in m=2, that is, put by two-stage cascade
The schematic diagram of big circuit.Wherein 501 represent amplifier control circuit, and 502/503/504/505/506/507 to represent amplifier each
Individual amplifying unit.508/509/510/511/512/513/514/515 represents the impedance unit in load output matching circuit.Its
In the amplifying circuit of i-th of 2 grades of Cascaded amplification circuit cascade in comprise niThe individual unit amplifying unit being connected in parallel；1≤i
≤m.
The input of the amplifying circuit of the 1st cascade from this 2 grades of Cascaded amplification circuit for the radiofrequency signal is into and through n1
After the individual amplification of unit amplifying unit being connected in parallel, then the input of the amplifying circuit exporting to the 2nd cascade is amplified,
Obtain Cascaded amplification signal and pass to described output matching circuit；
The output matching circuit 508/509/510/511/512/513/514/ of multimode power amplifier of the present utility model
515 pairs of Cascaded amplification signals export to antenna after carrying out load optimized coupling.Wherein 509 and 510 one wave filter of composition, 512
With 513 second wave filter of composition, 514 and 515 the 3rd wave filter of composition.Specifically,
As shown in figure 5, output matching circuit is by the first impedance z1, the second impedance z2, the 3rd impedance z3, the 4th impedance
Z4, the 5th impedance z5, the 6th impedance z6, the 7th impedance z7 and the 8th impedance z8 composition；
One end of first impedance z1 is connected with the outfan of multimode power amplifier, for receiving Cascaded amplification signal, separately
There is, with the second impedance z2 and the 4th impedance z4, the node a being jointly connected one end；The other end of the second impedance z2 and the 3rd impedance
One end of z3 is connected, the 3rd impedance z3 other end ground connection, and the second impedance z2 and the 3rd impedance z3 collectively forms first harmonic filtering
Device；One end of 4th impedance z4 is connected with power supply, and the other end and the first impedance z1 and the second impedance z2 are connected in node a；5th
Common end after impedance z5 and the 6th impedance z6 parallel connection is also connected to node a, and the other end after parallel connection is connected to node b, the
Five impedance z5 and the common shape of the 6th impedance z6 constitute second harmonic wave filter；One end of 7th impedance z7 is connected to node b, another
End is grounded after the 8th impedance z8, and the 7th impedance z7 and the 8th impedance z8 collectively forms the 3rd harmonic filter；Node b with
Antenna is connected.
This load matching circuit is the improvement based on existing design Fig. 1 in market, simultaneously by power amplifier
The scalable of power is it is also possible to optimize the generation of harmonic wave under certain output for this power amplifier.
Fig. 6 be of the present utility model another kind high-efficiency and low-harmonic multimode power amplifier in m=2, i.e. two-stage cascade
The schematic diagram of amplifying circuit.Wherein 601 represent amplifier control circuit, and 602/603/604/605/606/607 represents amplifier
Each amplifying unit.608/609/610/611/612/613/614/615/616/617 represents in load output matching circuit
Impedance unit.
The output matching circuit 608/609/610/611/612/613/614/ of multimode power amplifier of the present utility model
615/616/617 pair of Cascaded amplification signal exports to antenna after carrying out load optimized coupling.Wherein 608 and 609 composition one filters
Ripple device, 612 and 613 second wave filter of composition, 614 and 615 the 3rd wave filter of composition, 616 and 617 composition the 4th filtering
Device.Specifically,
As shown in fig. 6, output matching circuit is by the first impedance z1, the second impedance z2, the 3rd impedance z3, the 4th impedance
Z4, the 5th impedance z5, the 6th impedance z6, the 7th impedance z7, the 8th impedance z8, the 9th impedance z9 and the tenth impedance z10 composition；
One end of first impedance z1 is connected with the outfan of multimode power amplifier, for receiving Cascaded amplification signal, and
Form receiving node a, the other end passes through the second impedance z2 ground connection, the first impedance z1 and the second impedance z2 collectively forms first harmonic
Wave filter；One end of 3rd impedance z3 is connected with power supply, and one end of the other end and the 4th impedance z4 is connected in receiving node jointly
a；One end of the other end of the 4th impedance z4 and the 5th impedance z5 is connected in node b；The other end of the 5th impedance z5 passes through the 6th
Impedance z6 is grounded, and the 5th impedance z5 and the 6th impedance z6 collectively forms second harmonic wave filter；7th impedance z7 and the 8th impedance
Common end after z8 parallel connection is also connected to node b, and the common other end after parallel connection is connected to node c, the 7th impedance z7 and the
Eight impedance z8 collectively form third harmonic wave filter；One end connecting node c of the 9th impedance z9, the other end is through the tenth impedance
It is grounded after z10, the 9th impedance z9 and the tenth impedance z10 collectively forms the 4th harmonic filter；Node c is connected with antenna；
This load matching circuit is the improvement based on existing design Fig. 2 in market, simultaneously by power amplifier
The scalable of power is it is also possible to optimize the generation of harmonic wave under certain output for this power amplifier.
By that analogy, a kind of multimode power amplifier of the present utility model is all achievable in arbitrary integer m >=2.
As shown in Figure 5 or Figure 6, multimode power is constituted by multimode power amplifier and power-mode control circuitry and amplify mould
Block, power-mode control circuitry therein accordingly controls m level Cascaded amplification electricity by m group bias voltage or bias current respectively
The power on road；I-th group of bias voltage or bias current comprise niIndividual bias voltage or bias current simultaneously accordingly control niIndividual parallel connection
The power of the unit amplifying unit connecting, thus realize the output mode of multiple power；And with many in described output matching circuit
Individual harmonic filter realize multiple power low harmony wave output so that realize power amplifier efficient can meet simultaneously low
The requirement of harmonic wave.
In amplifying circuits at different levels, the bias voltage of each basic amplifying unit array or bias current are by power mode control
Circuit processed independently controls.When multimode power amplifier is in high-power output pattern, each base of amplifying circuits at different levels
This amplifying unit passes through bias voltage or bias current is all set to conducting state；When multimode power amplifier be in middle power or
During low-power output mode, the partly basic amplifying unit of amplifying circuits at different levels is set to turn on by bias voltage or bias current
State, the basic amplifying unit of remainder passes through bias voltage or bias current is all set to closed mode thus realizing to described many
The rf gain of mould power amplifier and the optimization of different output power.This design can reach under any power to work(
The performance of rate amplifier accordingly controls m level Cascaded amplification circuit by m group bias voltage or bias current；I-th group of biased electrical
Pressure or bias current comprise niIndividual bias voltage or bias current simultaneously accordingly control niIn all or partial unit amplifying unit
Radiofrequency signal is amplified accordingly and carries out with the optimization of other radio frequency amplifier performances, thus reaching the adjustable of many power
Section.
The performance of low harmony wave is by using brand-new power amplifier load match circuit, more wave filter organic
In conjunction with the basis of existing load, on the basis of the load matched not changing radio frequency dominant frequency, increased the reflection to harmonic wave,
Reach the generation of more low harmony wave in Internet of Things wireless communication terminal for this power amplifier.Bias voltage or bias current simultaneously
Scalable can also indirectly optimize harmonic wave under multiple outputs for this power amplifier.
Mobile terminal in existing Internet of Things radio communication system on market, power amplifier is mostly single mode power amplification
The design of device, this amplifier works under fixing output, can reach certain efficiency, existing load design has necessarily
Harmonic.In the system needing many power outputs, need multiple similar to such power amplifier, for example needing
In the system of three outputs, it is respectively necessary for three products similar to Fig. 2 and represents high power/middle power/lower powered penetrating
Frequency amplifies path.For example using high power amplifier during high-power output, using low power amplifier during low-power output.This three
Plant output channel each independent, the program, because using three power amplifiers, considerably increases area and the product of module
Cost.The integrated performance of this circuit is relatively low.Low harmony wave many power power amplifier of the present utility model can apply to existing
There is Internet of Things communication mobile terminal, mobile terminal can be made to reduce area/volume, the cost of mobile terminal can be saved.
Core unit in a kind of multi-mode radio frequency amplifier of high-efficiency and low-harmonic of this utility model offer and its module path
The adjustable scheme of part, every grade of its intermediate power amplifier is all adjustable to participate in final output power adjustable, wherein loads defeated
Go out the generation that match circuit can substantially reduce harmonic wave.Wherein power-mode control circuitry can be by the core of cmos or soi technology
Piece, the design of multi-stage cascade power amplifier can be the semiconductor technology of any suitable amplifier, for example, can include and not
It is confined to the technology of cmos, the technology of soi, the technology of gaas hbt, the technology of gaas phemt, the technology of gan hemt,
, it might even be possible to be the combination of multiple semiconductor technologies, the first order amplifying circuit of such as amplifier is by cmos for the technology of ldmos
Or soi Technology design, second level amplifying circuit is by gaas hbt Technology design.Impedance element wherein in load output matching circuit
Part can be passive discrete component, or the passive element based on semiconductor integration technology, or is based on substrate process, but not
It is confined to above-mentioned implementation or the combination of above-mentioned multiple technologies.
This utility model provides a kind of multimode power amplifier of high-efficiency and low-harmonic and comprises this amplifier and its mould
The scheme of block, it is mainly applied and can include being not limited to mobile phone, panel computer, notebook electricity in rf terminal equipment
Brain, the Wireless Telecom Equipment of vehicle electronics, Wireless Telecom Equipment of Internet of Things etc..In addition multimode amplifier of the present utility model
And its module can also apply among other Wireless Telecom Equipments, including being not limited to communication base station, satellite wireless communication,
Military Wireless Telecom Equipment etc..The technical scheme that therefore this utility model is proposed, can apply to need many power modes
And the adjustable any wireless communication terminal of bandwidth of operation, and do not limited by concrete communications band.Any in physical circuit or
Change in chip layout way of realization, is included within the covering scope of this patent.
Claims (5)
1. a kind of multimode power amplifier of high-efficiency and low-harmonic, comprising: m level Cascaded amplification circuit and output matching circuit；Institute
N is comprised in the amplifying circuit of i-th cascade stating m level Cascaded amplification circuitiThe individual unit amplifying unit being connected in parallel；1≤i≤
M and m >=2；
The input of the amplifying circuit of i-th cascade from described m level Cascaded amplification circuit for the radiofrequency signal is into and through niIndividual simultaneously
After the amplification of unit amplifying unit that connection connects, then the input of the amplifying circuit exporting to i+1 cascade is amplified, directly
To after the amplification through the amplifying circuit of m-th cascade, obtain Cascaded amplification signal and pass to described output matching circuit；
Described output matching circuit exports to antenna after described Cascaded amplification signal is carried out with load optimized coupling, it is characterized in that:
Described output matching circuit is by the first impedance z1, the second impedance z2, the 3rd impedance z3, the 4th impedance z4, the 5th impedance
Z5, the 6th impedance z6, the 7th impedance z7 and the 8th impedance z8 composition；
One end of described first impedance z1 is connected with the outfan of described multimode power amplifier, for receiving described Cascaded amplification
Signal, the other end has, with the second impedance z2 and the 4th impedance z4, the node a being jointly connected；The other end of described second impedance z2
It is connected with one end of the 3rd impedance z3, described 3rd impedance z3 other end ground connection, described second impedance z2 and the 3rd impedance z3 is altogether
With composition first harmonic wave filter；One end of described 4th impedance z4 is connected with power supply, the other end and the first impedance z1 and second
Impedance z2 is connected in described node a；Common end after described 5th impedance z5 and the 6th impedance z6 parallel connection is also connected to described
Node a, the other end after parallel connection is connected to node b, and described 5th impedance z5 and the common shape of the 6th impedance z6 constitute second harmonic
Wave filter；One end of described 7th impedance z7 is connected to described node b, and the other end is grounded after described 8th impedance z8, institute
State the 7th impedance z7 and the 8th impedance z8 and collectively form the 3rd harmonic filter；Described node b is connected with antenna.
2. multimode power amplifier according to claim 1, is characterized in that, described output matching circuit is by the first impedance
Z1, the second impedance z2, the 3rd impedance z3, the 4th impedance z4, the 5th impedance z5, the 6th impedance z6, the 7th impedance z7, the 8th impedance
Z8, the 9th impedance z9 and the tenth impedance z10 form；
One end of described first impedance z1 is connected with the outfan of described multimode power amplifier, for receiving described Cascaded amplification
Signal, and form receiving node a, the other end passes through the second impedance z2 ground connection, and described first impedance z1 and the second impedance z2 is common
Constitute first harmonic wave filter；One end of described 3rd impedance z3 is connected with power supply, and one end of the other end and the 4th impedance z4 is altogether
It is connected in described receiving node a together；The described other end of the 4th impedance z4 and one end of the 5th impedance z5 are connected in node b；Institute
The other end stating the 5th impedance z5 passes through the 6th impedance z6 ground connection, and described 5th impedance z5 and the 6th impedance z6 collectively forms second
Harmonic filter；Common end after described 7th impedance z7 and the 8th impedance z8 parallel connection is also connected to described node b, after parallel connection
The common other end be connected to node c, described 7th impedance z7 and the 8th impedance z8 collectively forms third harmonic wave filter；Described
One end of 9th impedance z9 connects described node c, and the other end is grounded after described tenth impedance z10, described 9th impedance z9
And the tenth impedance z10 collectively form the 4th harmonic filter；Described node c is connected with antenna.
3. multimode power amplifier according to claim 1 and 2, is characterized in that, described multimode power amplifier and power
Mode control circuit constitutes multimode power amplification module；
Described power-mode control circuitry accordingly controls m level Cascaded amplification electricity by m group bias voltage or bias current respectively
The power on road；I-th group of bias voltage or bias current comprise niIndividual bias voltage or bias current simultaneously accordingly control niIndividual parallel connection is even
The power of the unit amplifying unit connecing, thus realize the output mode of multiple power；And with multiple in described output matching circuit
The low harmony wave output of multiple power realized by harmonic filter.
4. a kind of multimode power amplifier as claimed in claim 1 or 2, is characterized in that, described output matching circuit is arranged on
In two stage power amplifier.
5. a kind of mobile terminal, is characterized in that: described mobile terminal has multimode power as claimed in claim 1 or 2 and amplifies
Device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620853777.7U CN205921561U (en) | 2016-08-08 | 2016-08-08 | High efficiency low -harmonic -wave's power amplifier and mobile terminal thereof |
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| CN201620853777.7U CN205921561U (en) | 2016-08-08 | 2016-08-08 | High efficiency low -harmonic -wave's power amplifier and mobile terminal thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106100591A (en) * | 2016-08-08 | 2016-11-09 | 苏州雷诚芯微电子有限公司 | The power amplifier of a kind of high-efficiency and low-harmonic and mobile terminal thereof |
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2016
- 2016-08-08 CN CN201620853777.7U patent/CN205921561U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106100591A (en) * | 2016-08-08 | 2016-11-09 | 苏州雷诚芯微电子有限公司 | The power amplifier of a kind of high-efficiency and low-harmonic and mobile terminal thereof |
| CN106100591B (en) * | 2016-08-08 | 2022-10-25 | 安徽佳视通电子科技有限公司 | High-efficiency low-harmonic power amplifier and mobile terminal thereof |
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