JPS6155283B2 - - Google Patents
Info
- Publication number
- JPS6155283B2 JPS6155283B2 JP56114369A JP11436981A JPS6155283B2 JP S6155283 B2 JPS6155283 B2 JP S6155283B2 JP 56114369 A JP56114369 A JP 56114369A JP 11436981 A JP11436981 A JP 11436981A JP S6155283 B2 JPS6155283 B2 JP S6155283B2
- Authority
- JP
- Japan
- Prior art keywords
- distortion
- amplifier
- nonlinear
- output
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Amplifiers (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Description
【発明の詳細な説明】
本発明は増幅器の非線形歪を補償するプリデイ
ストーシヨン法などの補償特性を安定化する装置
に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for stabilizing compensation characteristics such as a predistortion method for compensating for nonlinear distortion of an amplifier.
負帰還法が適用できない高周波帯増幅器の非線
形歪補償方式として知られているプリデイストー
シヨン法やポストデイストーシヨン法の補償特性
を安定化する方法として、特願昭54−014358のよ
うに補償後の残留歪成分を検出し、そのレベルが
最小となるように歪補償回路の特性を自動的に制
御する方法がある。第１図はそのような自動追従
形非線形補償方式の基本構成例を示す。第１図で
１は入力ポート、２は歪検出帯域の雑音を除去す
る帯域除去波器、３は電力分配器、４は遅延線
路、５は３次歪発生器、６は可変移相器、７は可
変減衰器、８は電力合成器、９は被補償増幅器、
１０は電力分配器、１１は出力ポート、１２は非
線形歪検出器、１３は非線形特性制御器、１４は
非線形歪補償回路である。しかしながら、被補償
増幅器が２台以上の増幅器で並列構成されている
場合、その非線形の周波数特性は単体増幅器の特
性と比較しより複雑となるため、広帯域に亘つて
良好な補償特性を得ることが困難となる欠点があ
つた。 As a method of stabilizing the compensation characteristics of the pre-distortion method and the post-distortion method, which are known as nonlinear distortion compensation methods for high frequency band amplifiers to which the negative feedback method cannot be applied, compensation is proposed in patent application No. 54-014358. There is a method of detecting the residual distortion component and automatically controlling the characteristics of the distortion compensation circuit so that its level is minimized. FIG. 1 shows an example of the basic configuration of such an automatic tracking type nonlinear compensation system. In FIG. 1, 1 is an input port, 2 is a band remover that removes noise in the distortion detection band, 3 is a power divider, 4 is a delay line, 5 is a third-order distortion generator, 6 is a variable phase shifter, 7 is a variable attenuator, 8 is a power combiner, 9 is a compensated amplifier,
10 is a power divider, 11 is an output port, 12 is a nonlinear distortion detector, 13 is a nonlinear characteristic controller, and 14 is a nonlinear distortion compensation circuit. However, when the compensated amplifier is configured with two or more amplifiers in parallel, its nonlinear frequency characteristics are more complex than those of a single amplifier, so it is difficult to obtain good compensation characteristics over a wide band. There were some drawbacks that made it difficult.
被補償増幅器が２台以上の単位増幅器９，１６
で並列接続される場合に、非線形歪補償を広帯域
に亘つて良好にする構成として各単位増幅器の
各々について自動追従形非線形歪補償を施すこと
が考えられるが、その場合、増幅器全体としての
歪成分は各単位増幅器についての非線形歪補償後
の残留歪成分が電力相加、もしくは最悪の場合は
電圧相加したものとして与えられる。 Unit amplifiers 9 and 16 with two or more compensated amplifiers
When connected in parallel, it is conceivable to perform automatic tracking type nonlinear distortion compensation for each unit amplifier as a configuration to improve nonlinear distortion compensation over a wide band, but in that case, the distortion component of the amplifier as a whole is given as the residual distortion component after nonlinear distortion compensation for each unit amplifier, added by power, or in the worst case, added by voltage.
本発明は従来の技術の上記欠点を改善すること
を目的とし、その特徴は、増幅器の入力径路また
は出力径路または並列径路に、歪発生器と線形回
路から構成される歪補償回路を接続し、さらに、
増幅器と歪補償回路から構成される増幅器系全体
としての出力信号中から歪成分を検出する歪検出
器ならびに検出された歪成分が減少する方向に歪
発生器出力の振幅と位相を制御する歪制御回路を
具備し増幅器の非直線歪を改善する自動追従形非
線形方式において、増幅器がｎ個（ｎは２以上の
自然数）の単位増幅器の並列接続で構成され、各
単位増幅器の各々に歪補償回路が具備され、歪検
出器が（ｎ−１）個の単位増幅器の出力と全単位
増幅器の合成出力に各々もうけられて検出された
歪情報が歪制御回路に印加されるごとき自動追従
形非線形補償方式にある。以下図面により説明す
る。 The present invention aims to improve the above-mentioned drawbacks of the conventional technology, and its features include connecting a distortion compensation circuit consisting of a distortion generator and a linear circuit to the input path, output path, or parallel path of the amplifier, moreover,
A distortion detector that detects distortion components from the output signal of the entire amplifier system consisting of an amplifier and a distortion compensation circuit, and a distortion control that controls the amplitude and phase of the distortion generator output in a direction that reduces the detected distortion components. In an automatic tracking nonlinear system that improves the nonlinear distortion of an amplifier, the amplifier is composed of n (n is a natural number of 2 or more) unit amplifiers connected in parallel, and each unit amplifier is equipped with a distortion compensation circuit. Automatic tracking type nonlinear compensation is provided in which distortion detectors are provided at the outputs of (n-1) unit amplifiers and the composite output of all unit amplifiers, respectively, and the detected distortion information is applied to the distortion control circuit. It's in the method. This will be explained below with reference to the drawings.
第２図は本発明の実施例である。ここで第１図
と同じ番号は同じ部材を示し、１５は非線形歪補
償回路、９と１６は被補償単位増幅器、１７は電
力分配器、１８は非線形歪検出器である。 FIG. 2 shows an embodiment of the invention. Here, the same numbers as in FIG. 1 indicate the same members, 15 is a nonlinear distortion compensation circuit, 9 and 16 are compensated unit amplifiers, 17 is a power divider, and 18 is a nonlinear distortion detector.
第２図に示されるように、１台の単位増幅器に
ついての非線形歪検出器を単位増幅器の出力を合
成した後の径路に接続し、かつ非線形歪補償回路
の非線形特性を、その合成出力中の残留歪成分が
減少する方向に変化せしめることにより増幅器系
全体の歪発生量を大幅に抑圧することが可能とな
る。 As shown in Figure 2, a nonlinear distortion detector for one unit amplifier is connected to the path after combining the outputs of the unit amplifiers, and the nonlinear characteristics of the nonlinear distortion compensation circuit are detected in the combined output. By changing the residual distortion component in a direction that reduces it, it becomes possible to significantly suppress the amount of distortion generated in the entire amplifier system.
第２図において、非線形特性制御器１３は、初
めに第１の単位増幅器９の歪（歪検出器１２によ
り検出された歪）が最小になるごとく第１の非線
形歪補償回路１４を制御し、同様にｎ−１番目ま
での各単位増幅器の歪が最小となるように各非線
形歪補償回路を制御する（第２図の実施例ではｎ
＝２）。最後に全単位増幅器の合成出力の歪（歪
検出器１８により与えられる歪）が最小となるご
とく第ｎ番目の非線形歪補償回路１５を制御す
る。 In FIG. 2, the nonlinear characteristic controller 13 first controls the first nonlinear distortion compensation circuit 14 so that the distortion of the first unit amplifier 9 (the distortion detected by the distortion detector 12) is minimized, Similarly, each nonlinear distortion compensation circuit is controlled so that the distortion of each unit amplifier up to the (n-1)th unit amplifier is minimized (in the embodiment shown in FIG.
=2). Finally, the n-th nonlinear distortion compensation circuit 15 is controlled so that the distortion of the combined output of all unit amplifiers (the distortion given by the distortion detector 18) is minimized.
第３図は歪のベクトル関係を示すもので、図中
ベクトル１は被補償増幅器９の補償前の歪ベクト
ル、ベクトル２は非線形歪補償回路１４の歪ベク
トル、ベクトル３はベクトル１とベクトル２の相
殺残留ベクトルで被補償増幅器９の出力中のベク
トル成分に一致する。ベクトル４は増幅器１６と
補償回路１５による残留ベクトルである。 FIG. 3 shows the vector relationship of distortion. In the figure, vector 1 is the distortion vector of the compensated amplifier 9 before compensation, vector 2 is the distortion vector of the nonlinear distortion compensation circuit 14, and vector 3 is the distortion vector of vector 1 and vector 2. The canceled residual vector corresponds to the vector component in the output of the compensated amplifier 9. Vector 4 is a residual vector caused by amplifier 16 and compensation circuit 15.
ここで、非線形歪補償回路１４と１５が全く独
立に被補償増幅器９と１０の歪を最適補償する場
合には、それらの残留歪ベクトル３と４は全く独
立となるため、場合によつては第３図に示すよう
に電圧相加されることがある。これは１台の非線
形歪補償回路を、単位増幅器合成後の非線形歪を
改善するために用いた結果生ずるものであり、こ
の作用は各単位増幅器すべてについて自動非線形
歪補償装置を装備し、さらに増幅器系全体につい
て別個自動非線形歪補償装置を装備した構成と同
一である。 Here, when the nonlinear distortion compensation circuits 14 and 15 completely independently optimally compensate for the distortion of the compensated amplifiers 9 and 10, their residual distortion vectors 3 and 4 become completely independent, so in some cases, A voltage may be added as shown in FIG. This is the result of using one nonlinear distortion compensation circuit to improve the nonlinear distortion after unit amplifier synthesis.This effect is achieved by equipping each unit amplifier with an automatic nonlinear distortion compensation device, The configuration is the same as that in which the entire system is equipped with a separate automatic nonlinear distortion compensation device.
これに対して第２図のような構成を用いれば、
ベクトル３とベクトル４を互いに相殺することが
可能となり、増幅器全体としての残留歪が大幅に
低減される。本構成の場合、増幅器全体について
新たに自動非線形歪補償装置を設けることが不要
となるため装置の経済化が可能となり、増幅器の
並列構成により実現される大出力固体増幅器の非
線形歪補償方式として有効である。 On the other hand, if you use the configuration shown in Figure 2,
It becomes possible to cancel vectors 3 and 4 with each other, and the residual distortion of the amplifier as a whole is significantly reduced. In the case of this configuration, it is not necessary to newly install an automatic nonlinear distortion compensation device for the entire amplifier, which makes the device economical, and is effective as a nonlinear distortion compensation method for high-output solid-state amplifiers realized by parallel configuration of amplifiers. It is.
以上説明したように本発明は増幅器を並列接続
し、出力の増大を期待する場合に適した自動追従
形非線形歪補償方式の構成法といえる。さらに本
発明は、増幅器の種類、信号周波数と無関係にす
ベての電力合成形増幅器に適用可能であり、その
非線形歪を良好にかつ安定して改善することがで
きる。従つて本発明は、従来プリデイストーシヨ
ン法の効果が少なかつた電力合成形のFET増幅
器などにも非線形歪補償を有効に適用できる利点
をもつ。 As explained above, the present invention can be said to be a method of configuring an automatic tracking type nonlinear distortion compensation system suitable for cases in which amplifiers are connected in parallel and an increase in output is expected. Furthermore, the present invention is applicable to all power combining type amplifiers regardless of the type of amplifier or signal frequency, and can improve the nonlinear distortion favorably and stably. Therefore, the present invention has the advantage that nonlinear distortion compensation can be effectively applied to power combining type FET amplifiers and the like, where conventional predistortion methods have had little effect.
第１図は従来の自動追従形非線形歪補償方式の
基本構成を示す図、第２図は本発明による装置の
一実施例のブロツク図、第３図は本発明の動作説
明のためのベクトル図である。
１……入力ポート、２……狭帯除去波器、３
……電力分配器、４……遅延回路、５……３次特
性歪発生器、６……可変移相器、７……可変減衰
器、８……電力合成器、９……被補償増幅器、１
０，１７……電力分配器、１１……出力ポート、
１２，１８……非線形歪検出器、１３……非線形
特性制御器、１４，１５……非線形歪補償回路、
１６……被補償増幅器。
FIG. 1 is a diagram showing the basic configuration of a conventional automatic tracking type nonlinear distortion compensation system, FIG. 2 is a block diagram of an embodiment of the device according to the present invention, and FIG. 3 is a vector diagram for explaining the operation of the present invention. It is. 1...Input port, 2...Narrow band remover, 3
... Power divider, 4 ... Delay circuit, 5 ... Third-order characteristic distortion generator, 6 ... Variable phase shifter, 7 ... Variable attenuator, 8 ... Power combiner, 9 ... Compensated amplifier ,1
0, 17...Power divider, 11...Output port,
12, 18... Nonlinear distortion detector, 13... Nonlinear characteristic controller, 14, 15... Nonlinear distortion compensation circuit,
16...compensated amplifier.
Claims (1)
径路に、歪発生器と線形回路から構成される歪補
償回路を接続し、さらに、増幅器と歪補償回路か
ら構成される増幅器系全体としての出力信号中か
ら歪成分を検出する歪検出器ならびに検出された
歪成分が減少する方向に歪発生器出力の振幅と位
相を制御する歪制御回路を具備し増幅器の非直線
歪を改善する自動追従形非線形補償方式におい
て、増幅器がｎ個（ｎは２以上の自然数）の単位
増幅器の並列接続で構成され、各単位増幅器の
各々に歪補償回路が具備され、歪検出器が（ｎ−
１）個の単位増幅器の出力と全単位増幅器の合成
出力に各々もうけられて検出された歪情報が歪制
御回路に印加されることを特徴とする自動追従形
非線形補償方式。1. A distortion compensation circuit consisting of a distortion generator and a linear circuit is connected to the input path, output path, or parallel path of the amplifier, and furthermore, from the output signal of the entire amplifier system consisting of the amplifier and the distortion compensation circuit, An automatic tracking nonlinear compensation system that improves the nonlinear distortion of an amplifier by including a distortion detector that detects distortion components and a distortion control circuit that controls the amplitude and phase of the output of the distortion generator in a direction that reduces the detected distortion components. , the amplifier is composed of n unit amplifiers (n is a natural number of 2 or more) connected in parallel, each unit amplifier is equipped with a distortion compensation circuit, and the distortion detector is (n-
1) An automatic tracking type nonlinear compensation system characterized in that distortion information generated and detected in the output of each unit amplifier and the composite output of all unit amplifiers is applied to a distortion control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56114369A JPS5817712A (en) | 1981-07-23 | 1981-07-23 | Automatic tracking type nonlinear compensation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56114369A JPS5817712A (en) | 1981-07-23 | 1981-07-23 | Automatic tracking type nonlinear compensation system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5817712A JPS5817712A (en) | 1983-02-02 |
| JPS6155283B2 true JPS6155283B2 (en) | 1986-11-27 |
Family
ID=14635979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56114369A Granted JPS5817712A (en) | 1981-07-23 | 1981-07-23 | Automatic tracking type nonlinear compensation system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5817712A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9410042B2 (en) | 2012-03-30 | 2016-08-09 | Aditya Birla Science And Technology Company Ltd. | Process for obtaining carbon black powder with reduced sulfur content |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60173908A (en) * | 1984-02-20 | 1985-09-07 | Fujitsu Ltd | Nonlinear distortion compensating circuit |
| JPS6384780A (en) * | 1986-09-26 | 1988-04-15 | Kitoo Tekko Kk | Butt welding method for square bar or the like |
| JPS63190411A (en) * | 1987-02-02 | 1988-08-08 | Nippon Telegr & Teleph Corp <Ntt> | Power amplifier |
-
1981
- 1981-07-23 JP JP56114369A patent/JPS5817712A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9410042B2 (en) | 2012-03-30 | 2016-08-09 | Aditya Birla Science And Technology Company Ltd. | Process for obtaining carbon black powder with reduced sulfur content |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5817712A (en) | 1983-02-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5634271B2 (en) | Improved control loop for the amplification stage | |
| US6232838B1 (en) | Feed-forward amplifier and method of compensating non-linear distortion in the same | |
| JP3106996B2 (en) | Feed forward amplification circuit | |
| KR200212866Y1 (en) | Active Distortion Signal Generator for Line Distortion Power Amplifier | |
| JPH05504457A (en) | Feedforward distortion reduction circuit | |
| KR20010005877A (en) | Pulse referenced control method for enhanced power amplification of a pulse modulated signal | |
| JPH0537263A (en) | Constant amplitude wave synthesis amplifier | |
| EP0526241B1 (en) | Linear compensating circuit | |
| US6194964B1 (en) | Predistorter having an automatic gain control circuit and method therefor | |
| US5874856A (en) | Feed forward amplifier | |
| JPH07249943A (en) | Feedforward type distortion compensating circuit | |
| WO1995004400A1 (en) | Adaptive feedback system | |
| JPH11298258A (en) | Input signal amplifying method and feed forward circuit | |
| JPS6155283B2 (en) | ||
| JPS6355805B2 (en) | ||
| US7015753B2 (en) | Digital signal processing based implementation of a feed forward amplifier | |
| JPH06224650A (en) | Distortion compensated amplifier | |
| JP3367745B2 (en) | Distortion compensator | |
| JPS5823965B2 (en) | Linear amplifier that removes disturbances | |
| JP2788865B2 (en) | Distortion compensator | |
| JP2697618B2 (en) | Feedforward amplifier | |
| JP2003229727A (en) | Nonlinear distortion compensation circuit | |
| JPS60171831A (en) | Cross modulation compensating device | |
| US6348838B1 (en) | Optimal power combining for balanced error correction amplifier | |
| JPH0797733B2 (en) | Non-linear distortion compensation circuit for power amplifier |