CN105790720B - Bimodulus enhanced efficiency linear power amplifier - Google Patents
Bimodulus enhanced efficiency linear power amplifier Download PDFInfo
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- CN105790720B CN105790720B CN201610246198.0A CN201610246198A CN105790720B CN 105790720 B CN105790720 B CN 105790720B CN 201610246198 A CN201610246198 A CN 201610246198A CN 105790720 B CN105790720 B CN 105790720B
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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
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
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Abstract
The present invention discloses a kind of bimodulus enhanced efficiency linear power amplifier, two stage power amplifying circuit and output circuit including LIPA structures, wherein, the two stage power amplifying circuit of LIPA structures amplifies branch circuit by 45 degree of phase shift two-stages and minus 45 degree of phase shift two-stages amplification branch circuit is constituted, it is characterised in that：Output circuit includes branch circuit A and branch circuit B, the branch circuit A include inductance L8, capacitance C6, inductance L10 and capacitance C5；The branch circuit B includes inductance L9, capacitance C7 and capacitance C3；The output end of another pole of capacitance C3 in the branch circuit B and the inductance L10 in the branch circuit A are all connect with power take-off RFOUT.This patent, which removes a part of element reduction number of elements, can entirely to design cheaper, reduction system complexity and raising system reliability.
Description
Technical field
The present invention relates to a kind of power amplifier, specifically a kind of bimodulus efficiency linear power amplifier.
Background technology
Efficient LIPA（Load Insensitive Power Amplifier, that is, load insensitive power amplifier）Allow
Still there is good PAE under low output power level（Power-Added Efficiency, i.e. power added efficiency）.So
And PAE possessed by this efficient LIPA can not be showed under various power it is fine, in order to improve the PAE of LIPA,
Bimodulus enhanced efficiency linear power amplifier design is proposed, this method is exactly to make efficient LIPA simultaneously in high power
Output level and low-power output level possess better PAE.Current phone supplier needs more cheap, smaller and more preferable
The mobile phone of performance.For WCDMA/CDMA power amplifiers, while being carried under high-output power level and low output power level
High PAE is the demand of current great competitiveness.
In 2005, a kind of novel efficient LIPA invented in Skyworks companies, as shown in Figure 1, it includes
The two stage power amplifying circuit and output circuit of LIPA structures, wherein the two stage power amplifying circuit of the LIPA structures by
45 degree of phase shift two-stage amplification branch circuits and minus 45 degree of phase shift two-stages amplification branch circuit are constituted.This amplifier allows low defeated
Going out still has good PAE under power level, and will not sacrifice its performance and the linearity under other output power levels.
This switching mode LIPA is operated very well always.Its output circuit by upper channel and lower channel output phase shifter and closely follow
The Wilkinson power synthesizer of this two channel output is synthesized below（Wilkinson power combiner）It is formed.This
It plants the fine of design work and provides one kind and loading insensitive structure well.The switching mode LIPA that Skyworks companies propose
Have the advantages that work is good, stability is high, durability is strong, keep load insensitive.However, this efficient LIPA is had
PAE be no longer its similar product --- the rival of the WCDMA power amplifiers of high PAE.This design has following
Several points limitation：
1. first, switching mode LIPA in highest than being intended to lower PAE when single-ended work, because of Weir
The gloomy power combiner of gold is inherently lossy.This inherent loss is partially due to discrete electricity in parallel between two channels
Resistance.It is so important, the damage even due to the 0.2-0.3dB of opposite mitigation caused by discrete resistance turning now to PAE
Mistake can not be endured, let alone it is so more so that PAE is reduced 2-3%.This is most important deficiency.
2. switching mode LIPA modes use first part's output matching network while being used as impedance transformer and phase shifter.This
Kind single structure provides the way of multi-functional, is to be difficult while being optimal impedance and accurately phase equilibrium.
3. upper channel and lower channel are not really Wilkinson power synthesizer to be caused to introduce certain journey independently of each other
The tuning of degree is difficult.This is because upper channel is connected together with lower channel by Wilkinson power synthesizer, wherein
The change of the impedance in one channel can have strong influence to the impedance in another channel, so any impedance to a wherein channel
Adjustment can affect the impedance in another channel.In this way so that switching mode LIPA does not allow neatly to remove adjustment upper channel respectively at that time
And lower channel, for example, it is also that another channel exists while wherein a channel is optimal impedance in high-power mode that cannot make
Optimal impedance is realized under low-power mode.
4. Wilkinson power synthesizer is also a kind of structure of large volume, it is seized of the real estate of certain values.
Invention content
In order to solve the shortcomings of the prior art, the object of the present invention is to provide a kind of linear work(of bimodulus enhanced efficiency
Rate amplifier.This patent, which removes a part of element reduction number of elements, can entirely to design cheaper, reduction system complex
Degree and raising system reliability.
To achieve the above object, the technical solution adopted in the present invention is：
Bimodulus enhanced efficiency linear power amplifier, including the two stage power amplifying circuit of LIPA structures and output electricity
Road, wherein the two stage power amplifying circuit of the LIPA structures amplifies branch circuit and minus 45 degree of shiftings by 45 degree of phase shift two-stages
Phase two-stage is amplified branch circuit and is constituted, it is characterised in that：The output circuit includes branch circuit A and branch circuit B, described point
Branch circuit A includes inductance L8, capacitance C6, inductance L10 and capacitance C5, described 45 degree of phase shift two-stage amplification branch circuits and inductance
The input terminal of L8 is electrically connected, and the output end of inductance L8 is concatenated by capacitance C6 with the input terminal of inductance L10, a pole of capacitance C5 and
The output end of inductance L8 connects, another pole ground connection of capacitance C5；The branch circuit B includes inductance L9, capacitance C7 and capacitance C3,
Minus 45 degree of phase shift two-stages amplification branch circuit is electrically connected with the input terminal of inductance L9, output end and the capacitance C3 of inductance L9
Pole connection, a pole of capacitance C7 connect with the output end of inductance L6, and another pole of capacitance C7 is grounded；The branch circuit B
In another pole of capacitance C3 and the output end of the inductance L10 in the branch circuit A all connect with power take-off RFOUT.
The working method of bimodulus enhanced efficiency linear power amplifier, it is characterised in that：It is being operated in low-power mode
When, in order to preserve energy, minus 45 degree of phase shift two-stages amplification branch circuit is closed, and all power amplify branch from 45 degree of phase shift two-stages
Circuit flows through；When being operated in high-power mode, 45 degree of phase shift two-stage amplification branch circuits and minus 45 degree of phase shift two-stages have been used
Amplify the balanced structure of branch circuit, input signal will be split into 45 degree of phase shift two-stage amplification branch circuits and bear after coming in
45 degree of phase shift two-stages amplify branch circuits, after the signal of separation is by above-mentioned two branch circuits amplification, are shifted by back,
The signal of separation is enable to carry out same mix in output circuit.
Beneficial effects of the present invention：This patent is the improvement to LIPA power amplifiers, in LIPA power amplifiers, is protected
Other circuit structures have been stayed, only output circuit therein is improved, is had the following advantages：
（1）There is higher PAE than LIPA：
A. for the UMTS frequency bands in the case where WCDMA is modulated：Under 28dBm high-power modes, highest PAE is 44%, and
The highest PAE of LIPA of standard only have 41%；Under 16dBm low-power modes, highest PAE is 21%, and the LIPA of standard
Highest PAE only has 18%.
B. for the CELL frequency bands in the case where WCDMA is modulated：Under 28.5dBm high-power modes, highest PAE is 44%,
And the highest PAE of LIPA of standard only have 41%；Under 16dBm low-power modes, highest PAE is 21%, and standard
The highest PAE of LIPA only have 18%.
（2）In high-power mode, keep loading insensitive characteristic.45 degree of phase shift two-stage amplification branch circuits and minus 45 degree of shiftings
Phase two-stage amplifies the impedance difference in branch circuit, impedance transformation is isolated from phase equilibrium, or even at two points above-mentioned
In branch circuit under different impedance transformations, it can ensure phase equilibrium.
（3）In high-power mode, 45 degree of phase shift two-stage amplification branch circuits are operated in gain compression state, and minus 45 degree are moved
Phase two-stage amplification branch circuit is then operated in gain extension state, it is operated in the areas adjacent of power peak at this time.
（4）Removing Wilkinson power synthesizer makes the loss of output matching circuit lower.
（5）In power combing channel（Output circuit）In, a spiral inductance has been only used, two elements are eliminated, because
Overall dimensions needed for this output network become smaller.Less SMT（Surface Mount Technology, i.e. surface are pasted
Dress technology）The spiral inductance of number of elements and a printing formula so that PA moulds can be realized under the area of 3mm x 3mm
Type；And the LIPA structures of standard are difficult to be compressed to the area of 3mm x 3mm.A part of element is removed in output circuit reduces element
Quantity can entirely to design cheaper, reduction system complexity and raising system reliability.
（6）45 degree of phase shift two-stage amplification branch circuits individually optimize for low-power mode, therefore in low-power mould
Achieve the purpose that improve PAE under formula.
Description of the drawings
Invention is further described in detail with reference to the accompanying drawings and detailed description：
Fig. 1 is the circuit diagram of existing LIPA structures power amplifier；
Fig. 2 is the circuit diagram of the present invention.
Specific implementation mode
As shown in Fig. 2, bimodulus enhanced efficiency linear power amplifier, includes the two stage power amplifying circuit of LIPA structures
And output circuit, wherein the two stage power amplifying circuit of the LIPA structures by 45 degree of phase shift two-stages amplify branch circuits and
Minus 45 degree of phase shift two-stages amplification branch circuit is constituted, it is characterised in that：The output circuit includes branch circuit A and branch circuit
B, the branch circuit A include inductance L8, capacitance C6, inductance L10 and capacitance C5, described 45 degree of phase shift two-stage amplification branch electricity
Road is electrically connected with the input terminal of inductance L8, and the output end of inductance L8 is concatenated by capacitance C6 with the input terminal of inductance L10, capacitance C5
A pole connect with the output end of inductance L8, another pole of capacitance C5 ground connection；The branch circuit B includes inductance L9, capacitance C7
With capacitance C3, minus 45 degree of phase shift two-stages amplification branch circuit is electrically connected with the input terminal of inductance L9, the output of inductance L9
End is connect with a pole of capacitance C3, and a pole of capacitance C7 is connect with the output end of inductance L6, another pole ground connection of capacitance C7；It is described
The output end of another pole of capacitance C3 in branch circuit B and the inductance L10 in the branch circuit A all with power take-off
RFOUT connections.
The working method of bimodulus enhanced efficiency linear power amplifier, it is characterised in that：It is being operated in low-power mode
When, in order to preserve energy, minus 45 degree of phase shift two-stages amplification branch circuit is closed, and all power amplify branch from 45 degree of phase shift two-stages
Circuit flows through；When being operated in high-power mode, 45 degree of phase shift two-stage amplification branch circuits and minus 45 degree of phase shift two-stages have been used
Amplify the balanced structure of branch circuit, input signal will be split into 45 degree of phase shift two-stage amplification branch circuits and bear after coming in
45 degree of phase shift two-stages amplify branch circuits, after the signal of separation is by above-mentioned two branch circuits amplification, are shifted by back,
The signal of separation is enable to carry out same mix in output circuit.
1, output network removes Wilkinson power synthesizer, the inherent loss of output matching circuit is reduced, to carry
High PAE.
2, Wilkinson power synthesizer is eliminated on power combing channel, using spiral inductance, reduces output net
Network size.
3, cancel Wilkinson power synthesizer, directly the power amplifier in two channels is exported and carries out impedance matching and phase shift matching
After be mixed, counteract third order intermodulation distortion so that its linearity is greatly improved, while but also PAE is carried
It is high.
4, the structure of output circuit is successfully isolated impedance matching network from phase balance net network, enabled simultaneously in height
High PAE is realized under power and low-power mode.
5, in high-power mode, impedance matching net is isolated from phase balance net network due to the structure of output circuit
Network makes upper and lower two channels under different impedance matchings, can ensure phase equilibrium.
6, in high-power mode, the power amplifier of upper channel is operated in gain compression state, and the power of lower channel
Amplifier is then operated in gain extension state, it is operated in the areas adjacent of power peak at this time.
7, low-power mode optimization individually is carried out to upper channel, makes to improve PAE under low-power mode.
Generally speaking, the channel of the impedance matching network and phase-shift network of separation and high-low power pattern so that no matter
Under high-power mode or low-power mode, PAE can be greatlyd improve under the premise of not sacrificing the linearity.
The above is the preferred embodiment of the present invention, cannot limit the right model of the present invention with this certainly
It encloses, it is noted that for those skilled in the art, modify or wait to technical scheme of the present invention
With replacing, without departure from the protection domain of technical solution of the present invention.
Claims (1)
1. a kind of bimodulus enhanced efficiency linear power amplifier, including the two stage power amplifying circuit of LIPA structures and output electricity
Road, wherein the two stage power amplifying circuit of the LIPA structures amplifies branch circuit and minus 45 degree of shiftings by 45 degree of phase shift two-stages
Phase two-stage is amplified branch circuit and is constituted, it is characterised in that：The output circuit includes branch circuit A and branch circuit B, described point
Branch circuit A includes inductance L8, capacitance C6, inductance L10 and capacitance C5, described 45 degree of phase shift two-stage amplification branch circuits and inductance
The input terminal of L8 is electrically connected, and the output end of inductance L8 is concatenated by capacitance C6 with the input terminal of inductance L10, a pole of capacitance C5 and
The output end of inductance L8 connects, another pole ground connection of capacitance C5；The branch circuit B includes inductance L9, capacitance C7 and capacitance C3,
Minus 45 degree of phase shift two-stages amplification branch circuit is electrically connected with the input terminal of inductance L9, output end and the capacitance C3 of inductance L9
Pole connection, a pole of capacitance C7 connect with the output end of inductance L6, and another pole of capacitance C7 is grounded；The branch circuit B
In another pole of capacitance C3 and the output end of the inductance L10 in the branch circuit A all connect with power take-off RFOUT；
The working method of bimodulus enhanced efficiency linear power amplifier is as follows, when being operated in low-power mode, in order to preserve energy,
Minus 45 degree of phase shift two-stages amplification branch circuit is closed, and all power are flowed through from 45 degree of phase shift two-stage amplification branch circuits；Work as work
In high-power mode, 45 degree of phase shift two-stage amplification branch circuits and minus 45 degree of phase shift two-stages is used to amplify the flat of branch circuit
Weigh structure, and input signal will be split into 45 degree of phase shift two-stage amplification branch circuits and the amplification of minus 45 degree of phase shift two-stages after coming in
Branch circuit is shifted by back so that the signal energy of separation after the signal of separation is by above-mentioned two branch circuits amplification
Same mix is carried out in output circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610246198.0A CN105790720B (en) | 2016-04-20 | 2016-04-20 | Bimodulus enhanced efficiency linear power amplifier |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610246198.0A CN105790720B (en) | 2016-04-20 | 2016-04-20 | Bimodulus enhanced efficiency linear power amplifier |
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| Publication Number | Publication Date |
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| CN105790720A CN105790720A (en) | 2016-07-20 |
| CN105790720B true CN105790720B (en) | 2018-09-25 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116317978B (en) * | 2023-05-22 | 2023-07-21 | 广东工业大学 | Dual-mode power amplifier, power amplifying method and related equipment thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1874555A (en) * | 2005-05-31 | 2006-12-06 | 华为技术有限公司 | Method and device for raising output power of base station system |
| CN101098127A (en) * | 2006-06-19 | 2008-01-02 | 株式会社瑞萨科技 | RF power amplifier |
| CN102386870A (en) * | 2011-11-16 | 2012-03-21 | 武汉滨湖电子有限责任公司 | Amplitude and phase control equipment and control method for power amplifier |
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2016
- 2016-04-20 CN CN201610246198.0A patent/CN105790720B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1874555A (en) * | 2005-05-31 | 2006-12-06 | 华为技术有限公司 | Method and device for raising output power of base station system |
| CN101098127A (en) * | 2006-06-19 | 2008-01-02 | 株式会社瑞萨科技 | RF power amplifier |
| CN102386870A (en) * | 2011-11-16 | 2012-03-21 | 武汉滨湖电子有限责任公司 | Amplitude and phase control equipment and control method for power amplifier |
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| CN105790720A (en) | 2016-07-20 |
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Effective date of registration: 20220303 Address after: 510700 Room 305, No. 11, caipin Road, Huangpu District, Guangzhou, Guangdong Patentee after: Zhenzhi microchip (Guangzhou) Technology Co.,Ltd. Address before: 510090 Dongfeng East Road 729, Yuexiu District, Guangzhou City, Guangdong Province Patentee before: GUANGDONG University OF TECHNOLOGY |