TWI580176B - With automatic adjustment of the main and auxiliary amplifier power ratio than the Doher power amplifier - Google Patents
With automatic adjustment of the main and auxiliary amplifier power ratio than the Doher power amplifier Download PDFInfo
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本發明係為一種杜赫功率放大器，特別是一種具自動調節主輔放大器功率比的功能之杜赫功率放大器，以使此放大器在高輸出功率時能維持較寬的高轉換效益區間。The present invention is a Duch power amplifier, and more particularly a Duch power amplifier having a function of automatically adjusting the power ratio of the main and auxiliary amplifiers, so that the amplifier can maintain a wide range of high conversion efficiency at high output power.
現代無線通訊技術蓬勃發展，如藍芽、行動衛星通訊系統、無線區域網路、無線電話、個人無線通訊系統以及目前最熱門的物聯網等，這些無線通訊系統較以往要求更高功率、高轉換效益以及低功率消耗。要如何達到高功率、高轉換效益以及低功率消耗是非常值得研究的主題。Modern wireless communication technologies are booming, such as Bluetooth, mobile satellite communication systems, wireless local area networks, wireless phones, personal wireless communication systems, and the most popular Internet of Things. These wireless communication systems require higher power and higher conversion than ever before. Benefits and low power consumption. How to achieve high power, high conversion efficiency and low power consumption is a topic worth studying.
在無線通訊系統中，最主要影響整個系統的功率消耗以及效益值就是功率放大器，決定了電池的消耗及使用時間。為了提高功率放大器的效率，目前已經出現許多的技術，如開關模式功率放大器、包絡消除和恢復技術(EER)、包絡跟蹤技術、非線性元件實現線性放大技術(LINC)以及杜赫功率放大器等，其中杜赫功率放大器具有設計方法簡單、線性度佳、回退值效益好以及輸出功率值較高的優點，獲得了許多人採用和發展。In wireless communication systems, the power consumption and benefit value that affects the entire system is the power amplifier, which determines the battery consumption and usage time. In order to improve the efficiency of power amplifiers, many technologies have emerged, such as switch mode power amplifier, envelope cancellation and recovery (EER), envelope tracking technology, nonlinear components for linear amplification (LINC), and Duch power amplifiers. Among them, Duch power amplifier has the advantages of simple design method, good linearity, good return value and high output power value, which has been adopted and developed by many people.
將固定輸入功率比杜赫功率放大器的概念，轉變成可調整輸入功率比杜赫功率放大器，會有更多的變化性及高輸出功率時能有較寬的高轉換效益區間。Converting the fixed input power to the Duch power amplifier concept into an adjustable input power ratio than the Duch power amplifier, there will be more variability and high output power with a wider range of high conversion benefits.
杜赫(Doherty)功率放大器的技術是在1936年由美國的W. H. Doherty教授提出。概念分為兩功率放大器，一個為主要功率放大器，一個為輔助功率放大器。假設今天主要功率放大器要到達飽和時再加入輔助功率放大器可以使1-dB壓縮點向後推，得到較好的線性度，並且由於電流與輸出功率的轉換效率比也會增加，得到較高較好的回退值。系統由一個功率分配器饋入功率到兩個功率放大器中，經過功率放大器放大訊號後面再用四分之一波長(λ/4)傳輸線來彌補功率分配器以及不同類別的放大器的相位差，進而把兩分開的功率得以相加。The technology of the Doherty power amplifier was proposed by Professor W. H. Doherty of the United States in 1936. The concept is divided into two power amplifiers, one for the main power amplifier and one for the auxiliary power amplifier. Assuming that the main power amplifier is to be saturated when it is added to the auxiliary power amplifier, the 1-dB compression point can be pushed backwards to obtain better linearity, and the conversion efficiency ratio between current and output power is also increased, which is better. The back value. The system feeds power into two power amplifiers by a power splitter. After the power amplifier amplifies the signal, the quarter-wavelength (λ/4) transmission line is used to compensate the phase difference between the power divider and the amplifiers of different classes. Add the two separate powers together.
中華民國專利公開第201611514號，揭露一種具有可調阻抗終端電路之杜赫功率放大器組合器。一信號組合器可包含具有一第一線圈及一第二線圈之一平衡-不平衡變壓器電路。可在一第一埠與一第二埠之間實施該第一線圈。可在一第三埠與一第四埠之間實施該第二線圈。可藉由一第一電容器來耦合該第一埠與該第三埠。可藉由一第二電容器來耦合該第二埠與該第四埠。該第一埠可經組態以接收一第一信號。該第四埠可經組態以接收一第二信號。該第二埠可經組態以產生該第一信號與該第二信號之一組合。該信號組合器可包含將該第三埠耦合至一接地之一終端電路。該終端電路可包含一可調阻抗電路。The Republic of China Patent Publication No. 201611514 discloses a Duch power amplifier combiner having a variable impedance termination circuit. A signal combiner can include a balun circuit having a first coil and a second coil. The first coil can be implemented between a first turn and a second turn. The second coil can be implemented between a third turn and a fourth turn. The first turn and the third turn can be coupled by a first capacitor. The second turn and the fourth turn can be coupled by a second capacitor. The first port can be configured to receive a first signal. The fourth turn can be configured to receive a second signal. The second turn can be configured to generate the first signal in combination with one of the second signals. The signal combiner can include coupling the third turn to a grounded termination circuit. The termination circuit can include a tunable impedance circuit.
中華民國專利公告第I462469號，揭露一種功率放大器，尤指一種杜赫功率放大器。該功率放大器包括至少一載波放大器；至少一峰值放大器，其配置成與該載波放大器並聯，其方式使得該載波放大器及該峰值放大器共同運作成一杜赫放大器；複數輸入匹配電路，其中至少一電路分別連接到該載波放大器及該峰值放大器之輸入端；至少一阻抗控制電路，其每一電路連接到每個載波放大器之輸出端，用以控制每一個載波放大器之負載線阻抗；至少一輸出匹配電路，其可直接或間接地連接到該阻抗控制電路及該峰值放大器之輸出端；及至少一第一延遲電路，用以匹配該載波放大器與該峰值放大器之間的延遲。本發明提供一種能夠達到進一步小型化及整合的改良式杜赫功率放大器，而藉由利用一種改良的輸出及輸入匹配方法維持杜赫功率放大器之效率及線性度之優點，且藉由施加一種改良的輸入功率區分方法而使得其運作更類似一杜赫功率放大器之理想性運作。The Republic of China Patent Publication No. I462469 discloses a power amplifier, especially a Duch power amplifier. The power amplifier includes at least one carrier amplifier; at least one peaking amplifier configured to be in parallel with the carrier amplifier in such a manner that the carrier amplifier and the peaking amplifier operate together as a Duch amplifier; a complex input matching circuit, at least one of which Connected to the carrier amplifier and the input of the peak amplifier respectively; at least one impedance control circuit, each of which is connected to an output of each carrier amplifier for controlling the load line impedance of each carrier amplifier; at least one output matching a circuit directly or indirectly coupled to the impedance control circuit and an output of the peak amplifier; and at least a first delay circuit for matching a delay between the carrier amplifier and the peak amplifier. The present invention provides an improved Duch power amplifier capable of further miniaturization and integration, while maintaining the advantages of efficiency and linearity of the Duch power amplifier by utilizing an improved output and input matching method, and by applying an improvement The input power differentiation method makes its operation more similar to the ideal operation of a Duch power amplifier.
然而，上述之杜赫功率放大器若要達成各種輸入功率比，仍需要額外更改電路，而造成高轉換效益區侷限在一個較小的輸入功率範圍內。However, in order to achieve various input power ratios, the above-mentioned Duch power amplifier still needs to additionally change the circuit, and the high conversion efficiency area is limited to a small input power range.
因此，如何設計出一具自動調節主輔放大器功率比之杜赫功率放大器，即成為相關設備廠商以及研發人員所共同期待的目標。Therefore, how to design a Duch power amplifier that automatically adjusts the power ratio of the main and auxiliary amplifiers has become a common expectation of related equipment manufacturers and R&D personnel.
本發明人有鑑於習知技術之杜赫功率放大器若要達成各種輸入功率比，仍需要額外更改電路之缺失，乃積極著手進行開發，以期可以改進上述既有之缺點，經過不斷地試驗及努力，終於開發出本發明。The present inventors have made it necessary to further develop the circuit in order to achieve various input power ratios in order to achieve various input power ratios in view of the prior art, in order to improve the above-mentioned shortcomings, and to continually test and work hard. Finally, the invention has been developed.
本發明之目的，係提供一種具自動調節主輔放大器功率比之杜赫功率放大器。SUMMARY OF THE INVENTION It is an object of the present invention to provide a Doher power amplifier having an automatic adjustment of the power ratio of the main and auxiliary amplifiers.
為了達成上述之目的，本發明之具自動調節主輔放大器功率比之杜赫功率放大器係包括一射頻輸入端、一可調式轉換方向耦合器、一自動控制偏壓電路、一輔助功率放大器、一主要功率放大器、一四分之一波長傳輸線以及一射頻輸出端。In order to achieve the above object, the Duch power amplifier with automatic adjustment of the power ratio of the main and auxiliary amplifiers includes an RF input terminal, an adjustable conversion direction coupler, an automatic control bias circuit, an auxiliary power amplifier, A main power amplifier, a quarter-wavelength transmission line, and a radio frequency output.
該射頻輸入端係接收一射頻訊號。The RF input receives an RF signal.
該可調式轉換方向耦合器係包括一第一耦合線以及一第二耦合線。該第一耦合線係為缺口朝左的U字形耦合線，兩端各自設有一輸入埠以及一隔離埠，該輸入埠係與該射頻輸入端連接，並接收該射頻訊號。The adjustable conversion direction coupler includes a first coupling line and a second coupling line. The first coupling line is a U-shaped coupling line with a notch to the left, and each end is provided with an input port and an isolation port. The input line is connected to the RF input end and receives the RF signal.
該第二耦合線係為缺口朝右的U字形耦合線，兩端各自設有一耦合埠以及一直通埠，該第二耦合線係設置於該第一耦合線旁，且該第二耦合線與該第一耦合線的中間部分係互相平行不接觸，該可調式轉換方向耦合器係使用可變電容調整耦合係數，該耦合係數係為該耦合埠及該直通埠之間輸出功率比。The second coupling line is a U-shaped coupling line with a notch to the right, and a coupling 埠 and an all-way 各自 are respectively disposed at both ends, the second coupling line is disposed beside the first coupling line, and the second coupling line is The intermediate portions of the first coupling lines are not in parallel with each other. The adjustable conversion direction coupler adjusts the coupling coefficient by using a variable capacitor, and the coupling coefficient is an output power ratio between the coupling turns and the through pass.
該自動控制偏壓電路係與該隔離埠連接，該自動控制偏壓電路將該隔離埠的該射頻訊號轉換成直流訊號，以得知輸入功率，並控制偏壓以輸出至該可調式轉換方向耦合器，，以調整輸出端口的功率比，該輸出端口係為分別為該耦合埠以及該直通埠。The automatic control bias circuit is connected to the isolation ,, the automatic control bias circuit converts the RF signal of the isolation 成 into a DC signal to know the input power, and controls the bias voltage to output to the adjustable Converting the directional coupler to adjust the power ratio of the output port, the output port being the coupling 埠 and the through 埠, respectively.
該輔助功率放大器係為B類功率放大器，輸出負載阻抗Zb，並與該可調式轉換方向耦合器之該耦合埠連接。該主要功率放大器係為AB類的功率放大器，輸出負載阻抗Zab，並與該可調式轉換方向耦合器之該直通埠連接。The auxiliary power amplifier is a class B power amplifier that outputs a load impedance Zb and is coupled to the coupling 埠 of the adjustable conversion directional coupler. The main power amplifier is a class AB power amplifier that outputs a load impedance Zab and is connected to the through-turn 该 of the adjustable conversion directional coupler.
該四分之一波長傳輸線之一端係分別與該主要功率放大器以及該輔助功率放大器連接，以彌補該主要功率放大器以及該輔助功率放大器的相位差，進而相加該主要功率放大器以及該輔助功率放大器的功率。該射頻輸出端係與該四分之一波長傳輸線之另一端連接。One end of the quarter-wavelength transmission line is respectively connected to the main power amplifier and the auxiliary power amplifier to compensate for a phase difference between the main power amplifier and the auxiliary power amplifier, thereby adding the main power amplifier and the auxiliary power amplifier Power. The RF output is coupled to the other end of the quarter-wave transmission line.
其中，該具自動調節主輔放大器功率比之杜赫功率放大器係包括低功率工作模式、中功率工作模式以及高功率工作模式來驅動該自動控制偏壓電路產生正確的偏壓以得到最佳的該輔助功率放大器與該主要功率放大器之間的功率比。Wherein, the Duch power amplifier with automatic adjustment of the power ratio of the main and auxiliary amplifiers includes a low power operation mode, a medium power operation mode, and a high power operation mode to drive the automatic control bias circuit to generate a correct bias voltage for optimal use. The power ratio between the auxiliary power amplifier and the primary power amplifier.
該低功率工作模式係為該主要功率放大器工作，該輔助功率放大器關閉，該可調式轉換方向耦合器增加該主要功率放大器之輸入訊號，並降低該輔助功率放大器之輸入訊號。The low power mode of operation operates for the primary power amplifier, the auxiliary power amplifier is turned off, the adjustable conversion directional coupler increases the input signal to the primary power amplifier and reduces the input signal to the auxiliary power amplifier.
該中功率工作模式係為該主要功率放大器達到飽和狀態，該輔助功率放大器開始運作，但未達到飽和狀態，該可調式轉換方向耦合器將由低功率模式時將大部份輸入功率置於輸出至該主要功率放大器之狀況自動改成將輸入訊號可分成兩個同功率的輸入訊號分別輸入該主要功率放大器及該輔助功率放大器。The medium power mode of operation is that the main power amplifier is saturated, the auxiliary power amplifier starts to operate, but does not reach saturation state, and the adjustable conversion direction coupler will place most of the input power on the output in the low power mode. The condition of the main power amplifier is automatically changed to input the input signal into two power signals of the same power and input to the main power amplifier and the auxiliary power amplifier.
該高功率工作模式係為該主要功率放大器己完全飽和狀態以及該輔助功率放大器接近飽和狀態，該可調式轉換方向耦合器將近一步降低該主要功率放大器之輸入訊號以使其維持在飽和狀態，並增加該輔助功率放大器之輸入訊號之功率，使放大器可達更高之輸出功率及高轉換效益。The high power mode of operation is that the main power amplifier is fully saturated and the auxiliary power amplifier is near saturation, and the adjustable conversion directional coupler further reduces the input signal of the main power amplifier to maintain it in saturation state, and Increasing the power of the input signal of the auxiliary power amplifier enables the amplifier to achieve higher output power and high conversion efficiency.
藉由上述之結構，本發明因加入新型可調式轉換方向耦合器可以具自動調節主輔放大器功率比以達成可在不同輸入功率下，自行調變功率比使新型杜赫功率放大器在每個狀態下有更好的輸出功率及效率。With the above structure, the present invention can automatically adjust the power ratio of the main and auxiliary amplifiers by adding a new adjustable conversion direction coupler to achieve a self-modulating power ratio at different input powers, so that the new Duch power amplifier is in each state. Better output power and efficiency.
為使熟悉該項技藝人士瞭解本發明之目的，兹配合圖式將本發明之較佳實施例詳細說明如下。The preferred embodiments of the present invention are described in detail below with reference to the drawings.
請參考圖1所示，本發明之具自動調節主輔放大器功率比之杜赫功率放大器(1)係包括一射頻輸入端(10)、一可調式轉換方向耦合器(11)、一自動控制偏壓電路(12)、一輔助功率放大器(13)、一主要功率放大器(14)、一四分之一波長傳輸線(15)以及一射頻輸出端(16)。Referring to FIG. 1 , the Duch power amplifier (1) of the present invention has an automatic adjustment of the power ratio of the main and auxiliary amplifiers, and includes an RF input terminal (10), an adjustable conversion direction coupler (11), and an automatic control. A bias circuit (12), an auxiliary power amplifier (13), a main power amplifier (14), a quarter-wavelength transmission line (15), and a radio frequency output terminal (16).
該射頻輸入端(10)係接收一射頻訊號。The RF input terminal (10) receives an RF signal.
該可調式轉換方向耦合器(11)係包括一第一耦合線(110)以及一第二耦合線(111)。該第一耦合線(110)係為缺口朝左的U字形耦合線，兩端各自設有一輸入埠(1100)以及一隔離埠(1101)，該輸入埠(1100)係與該射頻輸入端(10)連接，並接收該射頻訊號。The adjustable conversion direction coupler (11) includes a first coupling line (110) and a second coupling line (111). The first coupling line (110) is a U-shaped coupling line with a notch to the left, and an input 埠 (1100) and an isolation 埠 (1101) are respectively disposed at both ends, and the input 埠 (1100) is connected to the RF input end ( 10) Connect and receive the RF signal.
該第二耦合線(111)係為缺口朝右的U字形耦合線，兩端各自設有一耦合埠(1110)以及一直通埠(1111)，該第二耦合線(111)係設置於該第一耦合線(110)旁，且該第二耦合線(111)與該第一耦合線(110)的中間部分係互相平行不接觸，該可調式轉換方向耦合器(11)係使用可變電容調整耦合係數，該耦合係數係為該耦合埠(1110)及該直通埠(1111)之間輸出功率比。The second coupling line (111) is a U-shaped coupling line with a notch to the right, and a coupling 埠 (1110) and an all-way 11 (1111) are respectively disposed at both ends, and the second coupling line (111) is disposed on the first a coupling line (110), and the second coupling line (111) and the middle portion of the first coupling line (110) are not in parallel with each other, and the adjustable conversion direction coupler (11) uses a variable capacitor The coupling coefficient is adjusted, which is the output power ratio between the coupling 埠 (1110) and the through 埠 (1111).
該自動控制偏壓電路(12)係與該隔離埠(1101)連接，該自動控制偏壓電路(12)將該隔離埠(1101)的該射頻訊號轉換成直流訊號，以得知輸入功率，並控制偏壓以輸出至該可調式轉換方向耦合器(11) ，以調整輸出端口的功率比，該輸出端口係為分別為該耦合埠(1110)以及該直通埠(1111)。The automatic control bias circuit (12) is connected to the isolation port (1101), and the automatic control bias circuit (12) converts the RF signal of the isolation port (1101) into a DC signal to learn the input. The power is controlled and output to the adjustable conversion direction coupler (11) to adjust the power ratio of the output port, which is the coupling port (1110) and the through port (1111), respectively.
該輔助功率放大器(13)係為B類功率放大器，輸出負載阻抗Zb，並與該可調式轉換方向耦合器(11)之該耦合埠(1110)連接。該主要功率放大器(14)係為AB類的功率放大器，輸出負載阻抗Zab，並與該可調式轉換方向耦合器(11)之該直通埠(1111)連接。The auxiliary power amplifier (13) is a class B power amplifier that outputs a load impedance Zb and is coupled to the coupling port (1110) of the adjustable conversion direction coupler (11). The main power amplifier (14) is a class AB power amplifier that outputs a load impedance Zab and is connected to the through port (1111) of the adjustable conversion directional coupler (11).
該四分之一波長傳輸線(15)之一端係分別與該輔助功率放大器(13)以及該主要功率放大器(14)連接，以彌補該輔助功率放大器(13)以及該功率主要放大器(14)的相位差，進而相加該輔助功率放大器(13)以及該主要功率放大器(14)的功率。該射頻輸出端(16)係與該四分之一波長傳輸線(15)之另一端連接。One end of the quarter-wavelength transmission line (15) is respectively connected to the auxiliary power amplifier (13) and the main power amplifier (14) to make up the auxiliary power amplifier (13) and the power main amplifier (14) The phase difference, in turn, adds the power of the auxiliary power amplifier (13) and the main power amplifier (14). The RF output (16) is coupled to the other end of the quarter-wave transmission line (15).
其中，該具自動調節主輔放大器功率比之杜赫功率放大器(1)係包括低功率工作模式、中功率工作模式以及高功率工作模式來驅動該自動控制偏壓電路(12)產生正確的偏壓以得到最佳的該輔助功率放大器(13)與該主要功率放大器(14)之間的功率比。Wherein, the Duch power amplifier (1) with automatic adjustment of the power ratio of the main and auxiliary amplifiers includes a low power operation mode, a medium power operation mode, and a high power operation mode to drive the automatic control bias circuit (12) to generate the correct The bias voltage is obtained to obtain an optimum power ratio between the auxiliary power amplifier (13) and the main power amplifier (14).
該低功率工作模式係為該主要功率放大器(13)工作，該輔助功率放大器(13)關閉，該可調式轉換方向耦合器(11)增加該主要功率放大器(14)之輸入訊號，並降低該輔助功率放大器(13)之輸入訊號。The low power mode of operation operates for the primary power amplifier (13), the auxiliary power amplifier (13) is turned off, the adjustable switching directional coupler (11) increases the input signal of the primary power amplifier (14) and reduces the The input signal of the auxiliary power amplifier (13).
該中功率工作模式係為該主要功率放大器(14)達到飽和狀態，該輔助功率放大器(13)開始運作，但未達到飽和狀態，該可調式轉換方向耦合器(11) 將由低功率模式時將大部份輸入功率置於輸出至該主要功率放大器(14)之狀況自動改成將輸入訊號可分成兩個同功率的輸入訊號分別輸入該主要功率放大器(14)及該輔助功率放大器(13)。The medium power mode of operation is when the main power amplifier (14) reaches saturation, the auxiliary power amplifier (13) starts to operate, but does not reach saturation state, and the adjustable conversion direction coupler (11) will be operated by the low power mode. Most of the input power is placed in the output to the main power amplifier (14), and the input signal can be divided into two input signals of the same power and input to the main power amplifier (14) and the auxiliary power amplifier (13). .
該高功率工作模式係為該主要功率放大器(14)己完全飽和狀態，以及該輔助功率放大器(13)接近飽和狀態，該可調式轉換方向耦合器(11)將近一步降低該主要功率放大器(14)之輸入訊號以使其維持在飽和狀態，並增加該輔助功率放大器(13)之輸入訊號之功率，使放大器可達更高之輸出功率及高轉換效益，藉由該可調式轉換方向耦合器(11)，該具自動調節主輔放大器功率比之杜赫功率放大器(1)在不需要額外更改電路的狀況下係達成各種輸入功率比。The high power mode of operation is that the main power amplifier (14) is fully saturated, and the auxiliary power amplifier (13) is near saturation, and the adjustable switching directional coupler (11) will further reduce the main power amplifier (14). The input signal is maintained to be saturated, and the input signal power of the auxiliary power amplifier (13) is increased, so that the amplifier can achieve higher output power and high conversion efficiency, and the adjustable conversion direction coupler (11) The Duch power amplifier (1) with automatic adjustment of the power ratio of the main and auxiliary amplifiers achieves various input power ratios without requiring additional circuit changes.
請參考圖2所示，在本發明之一較佳實施例中，該可調式轉換方向耦合器(11)更包括一第一電容(112)、一第二電容(113)以及一第三電容(114)以及二阻抗轉換單元(115)。Referring to FIG. 2, in a preferred embodiment of the present invention, the adjustable conversion direction coupler (11) further includes a first capacitor (112), a second capacitor (113), and a third capacitor. (114) and a two-impedance conversion unit (115).
該第一電容(112)之兩端係各自連接該第二耦合線(111)與該第一耦合線(110)的中間部分。該第二電容(113)之兩端係各自連接該第二耦合線(111)與該第一耦合線(110)的中間部分。該第三電容(114)之兩端係各自連接該第二耦合線(111)與該第一耦合線(110)的中間部分。The two ends of the first capacitor (112) are respectively connected to the intermediate portion of the second coupling line (111) and the first coupling line (110). The two ends of the second capacitor (113) are respectively connected to the intermediate portion of the second coupling line (111) and the first coupling line (110). The two ends of the third capacitor (114) are respectively connected to the middle portion of the second coupling line (111) and the first coupling line (110).
該等阻抗轉換單元(115)係各自與該第二電容之一端連接，該等阻抗轉換單元(115)各自包括一三分之一波長傳輸線(1150)、一第一電感(1151)、一可變電容(1152)以及一旁路電容(1153)。The impedance conversion units (115) are each connected to one end of the second capacitor, and the impedance conversion units (115) each include a one-third wavelength transmission line (1150), a first inductance (1151), and a Variable capacitance (1152) and a bypass capacitor (1153).
該三分之一波長傳輸線(1150)之一端係與該第二電容(113)之一端連接。該第一電感(1151)之一端係與該三分之一波長傳輸線(1150)之另一端連接，另一端係接地。該可變電容(1152)之一端係與該三分之一波長傳輸線(1150)之另一端連接，該可變電容(1152)之另一端係與一第一電壓連接。該旁路電容(1153)之一端係與該可變電容(1152)之另一端連接，另一端接地。One end of the one-third wavelength transmission line (1150) is connected to one end of the second capacitor (113). One end of the first inductor (1151) is connected to the other end of the one-third wavelength transmission line (1150), and the other end is grounded. One end of the variable capacitor (1152) is connected to the other end of the one-third wavelength transmission line (1150), and the other end of the variable capacitor (1152) is connected to a first voltage. One end of the bypass capacitor (1153) is connected to the other end of the variable capacitor (1152), and the other end is grounded.
請參考圖2以及圖3所示，在本發明之一較佳實施例中，該自動控制偏壓電路(12)係包括一功率檢測器(120)、一第一運算放大器(121)、一第一電阻(122)、一第一二極體(123)、一第二二極體(124)、一第二電阻(125)、一第二運算放大器(126)、一第三電阻(127)以及一第四電阻(128)。Referring to FIG. 2 and FIG. 3, in a preferred embodiment of the present invention, the automatic control bias circuit (12) includes a power detector (120), a first operational amplifier (121), a first resistor (122), a first diode (123), a second diode (124), a second resistor (125), a second operational amplifier (126), and a third resistor ( 127) and a fourth resistor (128).
該功率檢測器(120)之一端係與該隔離埠(1101)連接，並將該隔離埠(1101)的該射頻訊號轉換成直流訊號，以得知輸入功率。該第一運算放大器(121)之一輸入端係與該功率檢測器(120)之另一端連接，以限制何時開始改變偏壓。One end of the power detector (120) is connected to the isolation port (1101), and the RF signal of the isolation port (1101) is converted into a DC signal to know the input power. An input of the first operational amplifier (121) is coupled to the other end of the power detector (120) to limit when to begin changing the bias voltage.
該第一電阻(122)之一端係與一第二電壓連接，另一端係與該第一運算放大器(121)之另一輸入端連接。該第一二極體(123)之正端係與該第一運算放大器(121)之輸出端連接，該第一二極體(123)之負端係與該第一運算放大器(121)之另一輸入端連接。One end of the first resistor (122) is connected to a second voltage, and the other end is connected to the other input end of the first operational amplifier (121). The positive terminal of the first diode (123) is connected to the output end of the first operational amplifier (121), and the negative terminal of the first diode (123) is coupled to the first operational amplifier (121). The other input is connected.
第二二極體(124)之正端係與該第一運算放大器(121)之輸出端連接。該第二電阻(125)之一端係與該第二二極體(124)之負端連接，另一端係接地。該第二運算放大器(126)之一輸入端係與該第二二極體(124)之負端連接，輸出端係與一第三電壓連接，以進行直流訊號放大，讓該可調式轉換方向耦合器(11)可以在高功率時，得到其相對所需功率比。The positive terminal of the second diode (124) is coupled to the output of the first operational amplifier (121). One end of the second resistor (125) is connected to the negative terminal of the second diode (124), and the other end is grounded. An input end of the second operational amplifier (126) is connected to a negative terminal of the second diode (124), and an output terminal is connected to a third voltage for performing DC signal amplification to allow the adjustable conversion direction. The coupler (11) can obtain its relative required power ratio at high power.
該第三電阻(127)之一端係接地，另一端係與該第二運算放大器(126)之另一輸入端連接。該第四電阻(128)之一端係與該第二運算放大器(126)之另一輸入端連接，另一端係與該第二運算放大器(126)之輸出端連接。One end of the third resistor (127) is grounded, and the other end is connected to the other input of the second operational amplifier (126). One end of the fourth resistor (128) is connected to the other input end of the second operational amplifier (126), and the other end is connected to the output end of the second operational amplifier (126).
在本發明之較佳實施例中，在低功率工作模式時，該輔助功率放大器(13)之輸出負載阻抗Zb係遠大於該主要功率放大器(14)之輸出負載阻抗Zab，因此在低功率模式時，並聯合成輸出功率，係由該主要功率放大器(14)主控。In a preferred embodiment of the invention, the output load impedance Zb of the auxiliary power amplifier (13) is much larger than the output load impedance Zab of the main power amplifier (14) in the low power mode of operation, thus in the low power mode. When parallel, the combined output power is controlled by the main power amplifier (14).
在本發明之另一較佳實施例中，在高功率工作模式時，該輔助功率放大器(13)之輸出負載阻抗Zb係相等於該主要功率放大器(14)之輸出負載阻抗Zab，以達最佳合成功率。In another preferred embodiment of the present invention, in the high power mode of operation, the output load impedance Zb of the auxiliary power amplifier (13) is equal to the output load impedance Zab of the main power amplifier (14). Good synthesis power.
透過上述之結構，本發明因加入新型可調式轉換方向耦合器可以使在不需要額外更改電路的狀況下達成各種輸入功率比，加入自動控制偏壓電路，可將需要人為調動偏壓改變功率比的狀況改良，已達成可在不同輸入功率下，自行調變功率比使新型杜赫功率放大器在每個狀態下有更好的輸出功率及效率。再者，其結構型態並非所屬技術領域中之人士所能輕易思及而達成者，實具有新穎性以及進步性無疑。Through the above structure, the present invention can achieve various input power ratios without adding additional circuit changes by adding a new adjustable conversion direction coupler, and an automatic control bias circuit can be added, which can change the power by artificially biasing the bias voltage. Compared with the improved condition, it has been achieved that the power ratio can be self-modulated at different input powers, so that the new Duch power amplifier has better output power and efficiency in each state. Moreover, its structural form is not easily reached by those skilled in the art, and it is novel and progressive.
透過上述之詳細說明，即可充分顯示本發明之目的及功效上均具有實施之進步性，極具產業之利用性價值，且為目前市面上前所未見之新發明，完全符合發明專利要件，爰依法提出申請。唯以上所述著僅為本發明之較佳實施例而已，當不能用以限定本發明所實施之範圍。即凡依本發明專利範圍所作之均等變化與修飾，皆應屬於本發明專利涵蓋之範圍內，謹請 貴審查委員明鑑，並祈惠准，是所至禱。Through the above detailed description, it can fully demonstrate that the object and effect of the present invention are both progressive in implementation, highly industrially usable, and are new inventions not previously seen on the market, and fully comply with the invention patent requirements. , 提出 apply in accordance with the law. The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the invention. All changes and modifications made in accordance with the scope of the invention shall fall within the scope covered by the patent of the invention. I would like to ask your review committee to give a clear explanation and pray for it.
(1)‧‧‧具自動調節主輔放大器功率比之杜赫功率放大器
(10)‧‧‧射頻輸入端
(11)‧‧‧可調式轉換方向耦合器
(110)‧‧‧第一耦合線
(1100)‧‧‧輸入埠
(1101)‧‧‧隔離埠
(111)‧‧‧第二耦合線
(1110)‧‧‧耦合埠
(1111)‧‧‧直通埠
(112)‧‧‧第一電容
(113)‧‧‧第二電容
(114)‧‧‧第三電容
(115)‧‧‧阻抗轉換單元
(1150)‧‧‧三分之一波長傳輸線
(1151)‧‧‧第一電感
(1152)‧‧‧可變電容
(1153)‧‧‧旁路電容
(12)‧‧‧自動控制偏壓電路
(120)‧‧‧功率檢測器
(121)‧‧‧第一運算放大器
(122)‧‧‧第一電阻
(123)‧‧‧第一二極體
(124)‧‧‧第二二極體
(125)‧‧‧第二電阻
(126)‧‧‧第二運算放大器
(127)‧‧‧第三電阻
(128)‧‧‧第四電阻
(13)‧‧‧輔助功率放大器
(14)‧‧‧主要功率放大器
(15)‧‧‧四分之一波長傳輸線
(16)‧‧‧射頻輸出端(1)‧‧‧Dukh power amplifier with automatic adjustment of the power ratio of the main and auxiliary amplifiers
(10) ‧‧‧RF input
(11)‧‧‧Adjustable conversion direction coupler
(110)‧‧‧First coupling line
(1100) ‧‧‧ Input 埠
(1101)‧‧‧Isolation
(111)‧‧‧Second coupling line
(1110) ‧‧‧Coupling
(1111)‧‧‧Direct pass
(112)‧‧‧First Capacitor
(113)‧‧‧second capacitor
(114)‧‧‧ Third capacitor
(115)‧‧‧ Impedance conversion unit
(1150)‧‧‧Three-wavelength transmission line
(1151)‧‧‧First inductance
(1152)‧‧‧Variable Capacitance
(1153)‧‧‧ Bypass capacitor
(12)‧‧‧Automatic control bias circuit
(120)‧‧‧Power detector
(121)‧‧‧First operational amplifier
(122)‧‧‧First resistance
(123)‧‧‧First Diode
(124)‧‧‧Secondary diode
(125)‧‧‧second resistance
(126)‧‧‧Second operational amplifier
(127)‧‧‧ Third resistor
(128)‧‧‧fourth resistor
(13)‧‧‧Auxiliary Power Amplifier
(14)‧‧‧Main power amplifier
(15)‧‧‧ Quarter-wavelength transmission line
(16)‧‧‧RF output
圖1係本發明之具自動調節主輔放大器功率比之杜赫功率放大器之示意圖。 圖2係本發明之具自動調節主輔放大器功率比之杜赫功率放大器之另一實施例。 圖3係本發明之自動控制偏壓電路之示意圖。1 is a schematic diagram of a Duch power amplifier with automatic adjustment of the power ratio of the main and auxiliary amplifiers of the present invention. 2 is another embodiment of the Duch power amplifier of the present invention having an automatic adjustment of the power ratio of the main and auxiliary amplifiers. 3 is a schematic diagram of an automatic control bias circuit of the present invention.
(1)‧‧‧具自動調節主輔放大器功率比之杜赫功率放大器 (1)‧‧‧Dukh power amplifier with automatic adjustment of the power ratio of the main and auxiliary amplifiers
(10)‧‧‧射頻輸入端 (10) ‧‧‧RF input
(11)‧‧‧可調式轉換方向耦合器 (11)‧‧‧Adjustable conversion direction coupler
(110)‧‧‧第一耦合線 (110)‧‧‧First coupling line
(1100)‧‧‧輸入埠 (1100) ‧‧‧ Input 埠
(1101)‧‧‧隔離埠 (1101)‧‧‧Isolation
(111)‧‧‧第二耦合線 (111)‧‧‧Second coupling line
(1110)‧‧‧耦合埠 (1110) ‧‧‧Coupling
(1111)‧‧‧直通埠 (1111)‧‧‧Direct pass
(12)‧‧‧自動控制偏壓電路 (12)‧‧‧Automatic control bias circuit
(13)‧‧‧輔助功率放大器 (13)‧‧‧Auxiliary Power Amplifier
(14)‧‧‧主要功率放大器 (14)‧‧‧Main power amplifier
(15)‧‧‧四分之一波長傳輸線 (15)‧‧‧ Quarter-wavelength transmission line
(16)‧‧‧射頻輸出端 (16)‧‧‧RF output
Claims (3)
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| TW105122997A TWI580176B (en) | 2016-07-21 | 2016-07-21 | With automatic adjustment of the main and auxiliary amplifier power ratio than the Doher power amplifier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW105122997A TWI580176B (en) | 2016-07-21 | 2016-07-21 | With automatic adjustment of the main and auxiliary amplifier power ratio than the Doher power amplifier |
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| Publication Number | Publication Date |
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| TW201804727A TW201804727A (en) | 2018-02-01 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200828784A (en) * | 2006-06-07 | 2008-07-01 | Wipam Inc | Doherty power amplifier |
| TW200937840A (en) * | 2008-02-21 | 2009-09-01 | Univ Nat Taiwan | Cascode-cascade doherty power amplifier |
| WO2015049272A1 (en) * | 2013-10-05 | 2015-04-09 | Rwth Aachen | Sequential broadband doherty power amplifier having an adjustable output power backoff |
| US20160049910A1 (en) * | 2014-08-13 | 2016-02-18 | Skyworks Solutions, Inc. | Doherty power amplifier combiner with tunable impedance termination circuit |
-
2016
- 2016-07-21 TW TW105122997A patent/TWI580176B/en not_active IP Right Cessation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200828784A (en) * | 2006-06-07 | 2008-07-01 | Wipam Inc | Doherty power amplifier |
| TW200937840A (en) * | 2008-02-21 | 2009-09-01 | Univ Nat Taiwan | Cascode-cascade doherty power amplifier |
| WO2015049272A1 (en) * | 2013-10-05 | 2015-04-09 | Rwth Aachen | Sequential broadband doherty power amplifier having an adjustable output power backoff |
| US20160049910A1 (en) * | 2014-08-13 | 2016-02-18 | Skyworks Solutions, Inc. | Doherty power amplifier combiner with tunable impedance termination circuit |
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