CN108259009A - A kind of multi-stage, efficient power amplifier - Google Patents
A kind of multi-stage, efficient power amplifier Download PDFInfo
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- CN108259009A CN108259009A CN201810291450.9A CN201810291450A CN108259009A CN 108259009 A CN108259009 A CN 108259009A CN 201810291450 A CN201810291450 A CN 201810291450A CN 108259009 A CN108259009 A CN 108259009A
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- voltage
- amplifier
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- power amplifier
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- 230000003321 amplification Effects 0.000 description 1
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Classifications
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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
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
- H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
- H03F1/0211—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the supply voltage or current
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers
- H03F3/19—High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
- H03F3/211—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only using a combination of several amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/451—Indexing scheme relating to amplifiers the amplifier being a radio frequency amplifier
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
The invention discloses a kind of multi-stage, efficient power amplifier, including a prime low-voltage driving amplifier and a final stage high-voltage power amplifier；Or including a prime low-voltage driving amplifier and multiple final stage high-voltage power amplifiers；Or the power amplifier including a low-voltage driving amplifier and a high pressure belt APT/ET power-supply management system；Prime driving amplifier is operated in opposite low-voltage, and final power amplifier is operated in opposite high voltage.The prime driving amplifier of the present invention works in relatively low operating voltage, can keep the good linearity, the PAE of entire power amplifier is farthest improved in the case where meeting system linear degree requirement.Particularly, by only using APT/ET power-supply management systems in the power amplifier of final stage, the efficiency of entire power amplifier is not only effectively improved, but also due to the decoupling capacitor for there was only final power amplifier, thus reduces the payload of power-supply management system.
Description
Technical field
The present invention relates to radio-frequency front-end fields, and in particular to a kind of multi-stage, efficient rate amplifier.
Background technology
In modern wireless communication systems, radio-frequency power amplifier（RF Power Amplifier）It is to realize radiofrequency signal
The critical component of wireless transmission.Radio-frequency power amplifier is in the radio-frequency front-end of wireless communication system, and performance directly affects nothing
The communication quality and communication distance of line communication system, and it is largely fixed the power consumption of system.
Power added efficiency（Power-Added Efficiency, PAE）Weigh one of important indicator of power amplifier.
It is defined as the ratio between the difference of output power Pout and input power Pin and the power P dc of power supply supply.It can reflect radio-frequency power
Dc power is converted into the ability of radio-frequency power by amplifier.Working efficiency is low to cause very big energy loss, and generate
Heat can deteriorate the performance of power amplifier, if battery powered can also shorten usage time and the service life of battery.Consider
To factor of both thermal losses and battery working time, how to further improve the efficiency of radio-frequency power amplifier is exactly one
A major issue.
The non-constant enveloped modulation mode of modern wireless communication systems generally use, including π/4-DQPSK, OQPSK etc., they
Envelope is to change, carrier's information in envelope.The amplifier of one low linearity can generate high-order intermodulation and harmonic wave, cause hair
Machine spectral regrowth is penetrated, the signal-to-noise ratio in channel is reduced, causes AM-AM effects and AM-PM effects and the star chart for causing transmitter
Deformation.Therefore power amplifier must have enough linearities, ensure that radiofrequency signal is only linearly amplified.
Back-off technology（power back-off）It is most common linearization technique, its basic principle is to work as power
During reduction, each rank intermodulation ingredient and harmonic components can all be reduced with index percent, and output power only linearly reduces, thus can be carried
High linearity.Typical back-off value fallback value under 6 ~ 8dB, certain extreme cases is even as high as 10 ~ 20dB.Utilizing work(
During rate back off technique, the peak power output of power amplifier must be designed to apply the output power of actual needs high by one than this
A back-off value, and in actual work, the power after retracting only is used, there is no the maximum work outputs for utilizing power amplifier
Rate.Because power amplifier is typically designed near 1dB compression points, the effect of back-off technology meeting step-down amplifier
Rate.
With the continuous development of the communication technology, the rate of signal transmission is continuously improved, and leads to signal peak-to-average ratio（peak-to-
Average, PAR）Also become larger therewith.Power amplifier need to be operated in rollback region, with peak to maintain the higher linearity
Than raising, the power of rollback also increasing.Most the efficiency of power amplifier is caused to be greatly reduced at last, system can not be met
It is required that.
Invention content
For overcome the deficiencies in the prior art, the present invention provides a kind of multi-stage, efficient power amplifiers.
A kind of multi-stage, efficient power amplifier,
Including a prime low-voltage driving amplifier and a final stage high-voltage power amplifier；Or
Including a prime low-voltage driving amplifier and multiple final stage high-voltage power amplifiers；Or
Power amplifier including a low-voltage driving amplifier and a high pressure belt APT/ET power-supply management system；
Prime driving amplifier is operated in opposite low-voltage, and final power amplifier is operated in opposite high voltage.
The high voltage corresponds to 12V, and low-voltage corresponds to 3.6V；Or the high voltage corresponds to 28V, low electricity
Pressure corresponds to 12V.
One prime low-voltage driving amplifier and multiple final stage high-voltage power amplifiers, first by prime low-voltage driving
Amplifier is connected to a low consumption switch SPNT, then connects N number of low loss filter by low consumption switch SPNT（11~1N）, finally
Each road low loss filter, which is correspondingly connected with, is operated in respective bandwidth（Band 1~Band N）High-voltage power amplifier（21~
2N）.
Beneficial effects of the present invention：Usually, the driving amplifier output power of prime is with respect to the power amplifier of final stage
It is smaller, therefore driving amplifier works in that the good linearity can be still kept under relatively low operating voltage, is meeting system line
Property degree requirement in the case of farthest improve the PAE of entire power amplifier.Particularly, by only in the power of final stage
Amplifier uses APT/ET power-supply management systems, is not only effectively improved the efficiency of entire power amplifier, but also due to only
There is the decoupling capacitor of final power amplifier, thus reduce the payload of power-supply management system.
Description of the drawings
Fig. 1 is the first embodiment circuit diagram of the present invention；
Fig. 2 is second of embodiment circuit diagram of the present invention；
Fig. 3 is the third embodiment circuit diagram of the present invention.
Fig. 1 mesolows driving amplifier 1, high-voltage power amplifier 2, Fig. 2 mesolows driving amplifier 3, low consumption hilted broadsword N are thrown
Switch SPNT 4, low loss filter 11,12,13 ..., 1N, high-voltage power amplifier 21,22,23 ..., 2N, Fig. 3 mesolows
Driving amplifier 5, high-voltage power amplifier 6, APT/ET power-supply management systems 7.
Specific embodiment
The present invention is further elaborated below in conjunction with the accompanying drawings.
The core concept of the present invention is that prime driving amplifier is operated in opposite low-voltage, final power amplifier work
In opposite high voltage.Especiallyly and relatively commonly：High voltage corresponds to 12V, and low-voltage corresponds to 3.6V；Or high voltage pair
12V should be corresponded in 28V, low-voltage.
High Linear and the specific implementation of three kinds of circuits of efficiency operation are maintained the present invention provides radio-frequency power amplifier is made
Mode：1. it is realized by a low-voltage driving amplifier and a high-voltage power amplifier；2. by a low-voltage driving amplifier and
Multiple high-voltage power amplifiers are realized；3. by a low-voltage driving amplifier and a high pressure belt APT/ET（Mean power with
Track/envelope-tracking）The power amplifier of power-supply management system is realized.
The first circuit realizes radio-frequency power amplifier for a low-voltage driving amplifier and a high-voltage power amplifier
High Linear and the circuit of efficiency operation are maintained, it is specific as shown in Figure 1, the use of driving amplifier 1 of the first order is relatively low
Operating voltage improves the PAE of entire amplifier by reducing the loss of power.Final power amplifier 2 uses relatively high
Operating voltage ensures the output power of overall power amplifier.So this circuit can obtain the efficiency of power amplifier entirety
To promotion.
Second of circuit is to realize radio-frequency power amplification by a low-voltage driving amplifier and multiple high-voltage power amplifiers
Device maintains High Linear and the circuit of efficiency operation, specific as shown in Fig. 2, the use of driving amplifier 3 of the first order is relatively low
Operating voltage, the PAE of entire amplifier is improved by reducing the loss of power.Final stage is operated in different operating frequency by multiple
21 ~ 2N of high-voltage power amplifier form.It is switched by low consumption（SPNT）The filtering of 4 11 ~ 1N of selection and low loss filter,
Realize the efficiency operation of different frequency range.
The third circuit is the power by a low-voltage driving amplifier and a high pressure belt APT/ET power-supply management system
Amplifier realizes that power amplifier maintains High Linear and the circuit of efficiency operation, specifically as shown in figure 3, the driving of the first order is put
Big device 5 uses relatively low operating voltage, and the PAE of entire amplifier is improved by reducing the loss of power.Final power is put
The operating voltage of big device 6 is controlled using APT/ET power-supply management systems 7, and this structure is not only effectively improved entire power and puts
The efficiency of big device can also reduce the payload of power-supply management system.
The above-described case of the present invention is all the realization of high efficiency two stage power amplifier, it is clear that, high efficiency
The power amplifier of three stage power amplifiers or more grade can also be realized by the present invention.Such as to three stage power amplifiers
For, preceding two-stage drive amplifier uses relatively low operating voltage, and final power amplifier uses relatively high operating voltage；
First order driving amplifier uses relatively low operating voltage, and rear dual-stage amplifier uses relatively high operating voltage；It is alternatively, every
One stage power amplifier uses three operating voltages from low to high successively from the first order to final stage.
Embodiment of above is merely to illustrate the present invention, is not limitation of the present invention.
Claims (3)
1. a kind of multi-stage, efficient power amplifier, which is characterized in that
Including a prime low-voltage driving amplifier and a final stage high-voltage power amplifier；Or
Including a prime low-voltage driving amplifier and multiple final stage high-voltage power amplifiers；Or
Power amplifier including a low-voltage driving amplifier and a high pressure belt APT/ET power-supply management system；
Prime driving amplifier is operated in opposite low-voltage, and final power amplifier is operated in opposite high voltage.
2. multi-stage, efficient power amplifier as described in claim 1, which is characterized in that the high voltage corresponds to 12V, low
Voltage corresponds to 3.6V；Or the high voltage corresponds to 28V, low-voltage corresponds to 12V.
3. multi-stage, efficient power amplifier as described in claim 1, which is characterized in that a prime low-voltage driving is put
Big device and multiple final stage high-voltage power amplifiers are first connected to a low consumption switch SPNT by prime low-voltage driving amplifier, then
N number of low loss filter is connected by low consumption switch SPNT（11~1N）, last each road low loss filter, which is correspondingly connected with, to be operated in
The high-voltage power amplifier of respective bandwidth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810291450.9A CN108259009A (en) | 2018-04-03 | 2018-04-03 | A kind of multi-stage, efficient power amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810291450.9A CN108259009A (en) | 2018-04-03 | 2018-04-03 | A kind of multi-stage, efficient power amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108259009A true CN108259009A (en) | 2018-07-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810291450.9A Withdrawn CN108259009A (en) | 2018-04-03 | 2018-04-03 | A kind of multi-stage, efficient power amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108259009A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023142407A1 (en) * | 2022-01-28 | 2023-08-03 | 唯捷创芯(天津)电子技术股份有限公司 | Radio frequency front-end module and corresponding radio frequency front-end system, chip and electronic device |
-
2018
- 2018-04-03 CN CN201810291450.9A patent/CN108259009A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023142407A1 (en) * | 2022-01-28 | 2023-08-03 | 唯捷创芯(天津)电子技术股份有限公司 | Radio frequency front-end module and corresponding radio frequency front-end system, chip and electronic device |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180706 |
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| WW01 | Invention patent application withdrawn after publication |