JPS62206905A - Nonlinear distortion compensation circuit for power amplifier - Google Patents
Nonlinear distortion compensation circuit for power amplifierInfo
- Publication number
- JPS62206905A JPS62206905A JP4746086A JP4746086A JPS62206905A JP S62206905 A JPS62206905 A JP S62206905A JP 4746086 A JP4746086 A JP 4746086A JP 4746086 A JP4746086 A JP 4746086A JP S62206905 A JPS62206905 A JP S62206905A
- Authority
- JP
- Japan
- Prior art keywords
- nonlinear distortion
- power amplifier
- circuit
- phase
- input signal
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims abstract description 7
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 3
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 3
- 230000002194 synthesizing effect Effects 0.000 claims abstract 2
- 238000010586 diagram Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Amplifiers (AREA)
- Filters And Equalizers (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は電力増幅用として用いられる電子管において発
生する非直線歪み特性を補償する回路に関し、入力信号
の電力レベルつｔｂ電力増幅器の動作電力レベルの如何
にかかわらず常に最良の非直線歪み補償特性を得る方式
に関する。Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a circuit that compensates for non-linear distortion characteristics generated in an electron tube used for power amplification, and the present invention relates to a circuit that compensates for non-linear distortion characteristics generated in an electron tube used for power amplification. This invention relates to a method for always obtaining the best nonlinear distortion compensation characteristics regardless of the situation.
従来、この種の非直線歪み補償回路では、第２図の如く
、非直線歪み発生回路６が本線系に実装されている。そ
して、入力信号の電力レベルに応じて非直線歪み発生回
路６から発生される非直線歪み信号が後続の電力増幅器
１０に常に一定の比で逆相となる様合成され、全体とし
ての非直線歪み特性が補償される構成となっている。Conventionally, in this type of nonlinear distortion compensation circuit, a nonlinear distortion generation circuit 6 is mounted in the main line system, as shown in FIG. Then, the nonlinear distortion signal generated from the nonlinear distortion generation circuit 6 according to the power level of the input signal is synthesized to the subsequent power amplifier 10 so that the signals are always in opposite phase at a constant ratio, and the nonlinear distortion signal as a whole is generated. The structure is such that the characteristics are compensated.
上述した従来の非直線歪み補償回路では、非直線歪み発
生回路６と電力増幅器１０との結合の度合が一定となっ
ている。従って、非直線歪み発生回路６と電力増幅器１
０の非直線歪み発生の度合（比）がまったく等しい場合
にのみ、入力信号の電力レベルの如何にかかわらず、全
体として最良の非直線歪み補償特性を得ることが可能で
ある。In the conventional nonlinear distortion compensation circuit described above, the degree of coupling between the nonlinear distortion generation circuit 6 and the power amplifier 10 is constant. Therefore, the nonlinear distortion generation circuit 6 and the power amplifier 1
Only when the degree (ratio) of zero nonlinear distortion occurrence is exactly the same, it is possible to obtain the best nonlinear distortion compensation characteristic as a whole, regardless of the power level of the input signal.
しかしながら、一般に、電力増幅器には進行波管などの
電子管が用いられるのに対し、その非直線歪み補償の為
の非直線歪み発生回路にはｌＪＳ型化。However, while electron tubes such as traveling wave tubes are generally used in power amplifiers, the nonlinear distortion generation circuit for nonlinear distortion compensation is of the IJS type.
低電力化の為に固体電力増幅器が用いられ、それらの非
直線歪み特性は一般に異なる場合が多い。Solid-state power amplifiers are used to reduce power consumption, and their nonlinear distortion characteristics are often different.
その為、入力信号の電力レベルの大小の如何によっては
、必ずしも最良の補償特性が得られるわけ〔問題点を解
決するための手段及び作用〕本発明による非直線歪み補
償回路は、入力信号を本線系と支線系とに分岐する回路
と２分岐された本線系の入力信号の電力レベルを検出す
る回路と、該検出回路の信号により制御回路を通してあ
らかじめ設定された減衰量及び位相１へ各々調整される
可変減衰器及び可変位相器と、これら可変減衰器及び可
変位相器を通過した入力信号に対応して非直線歪み信号
を発生する非直線歪み発生回路と２分岐された本線系信
号に上記非直線歪み信号を合成する合成回路とから構成
され２分岐した入力信号の電力レベルに応じ振幅・位相
両面にて全体の歪み補償に最適の非直線歪み信号を生み
出し本線系の入力信号と合成することによって常に最良
の非直線歪み補償特性を得ることを可能としている。Therefore, depending on the magnitude of the power level of the input signal, the best compensation characteristics cannot necessarily be obtained. [Means and effects for solving the problem] The nonlinear distortion compensation circuit according to the present invention A circuit that branches into the main line system and the branch line system, and a circuit that detects the power level of the input signal of the main line system that is branched into two, and the signal from the detection circuit is adjusted to a preset attenuation amount and phase 1 through a control circuit. a variable attenuator and a variable phase shifter; a nonlinear distortion generation circuit that generates a nonlinear distortion signal in response to the input signal that has passed through the variable attenuator and the variable phase shifter; It is composed of a synthesis circuit that synthesizes linear distortion signals, and generates a nonlinear distortion signal that is optimal for overall distortion compensation in terms of both amplitude and phase according to the power level of the two-branched input signal, and synthesizes it with the main line input signal. This makes it possible to always obtain the best nonlinear distortion compensation characteristics.
次に２本発明の実施例について図面を参照して説明する
。Next, two embodiments of the present invention will be described with reference to the drawings.
第１図は本発明の一実施例を示す系統図である０高周波
信号入力端子１に入力された高周波信号は。FIG. 1 is a system diagram showing one embodiment of the present invention.The high frequency signal input to the high frequency signal input terminal 1 is as follows.
分岐回路として作用する方向性結合器２により。By means of a directional coupler 2 acting as a branch circuit.
本線系及び支線系へと二分される。支線系の高周波信号
は、更に方向性結合器３により分岐された後、一方は可
変減衰器４．可変位相器５を通して非直線歪み発生回路
６へ送られる。方向性結合器３で分岐された他方の信号
は電力レベル検出回路７に送られ、その電力レベルが検
出される。レベル検出信号は制御回路８を通し、可変減
衰器４及び可変位相器５へ、各々適当なノくイアス信号
に変換されて送られる。このようにして非直線歪み発生
回路６で発生した非直線歪み信号は、方向性結合器９に
おいて本線系の高周波信号に合成され。It is divided into a main line system and a branch line system. The high frequency signal of the branch line system is further branched by a directional coupler 3, and then one side is sent to a variable attenuator 4. The signal is sent to the nonlinear distortion generation circuit 6 through the variable phase shifter 5. The other signal branched by the directional coupler 3 is sent to a power level detection circuit 7, and its power level is detected. The level detection signal passes through the control circuit 8 and is sent to the variable attenuator 4 and the variable phase shifter 5 after being converted into appropriate signals. The nonlinear distortion signal generated in the nonlinear distortion generation circuit 6 in this manner is combined with the high frequency signal of the main line system in the directional coupler 9.
後続の電力増幅器１０へと送られる。電力増幅器１０で
発生する非直線歪みは、あらかじめ非直線歪み発生回路
６で生み出される非直線歪みと逆相のかたらで合成され
ることによって相殺され、全体としての非直線歪み特性
が改善されることになる。It is sent to the subsequent power amplifier 10. The nonlinear distortion generated in the power amplifier 10 is canceled out by being combined with the nonlinear distortion generated in advance in the nonlinear distortion generation circuit 6 in an opposite phase, and the nonlinear distortion characteristics as a whole are improved. become.
この場合、各々の非直線歪み成分が振幅的にはまったく
等しく１位相的には精確に逆相でおることが最高の補償
特性を得ることにつながることはあきらかである。従っ
て本発明では、電力レベル検出回路７で入力信号の電力
レベルの大小を検出して電力増幅器１０の動作レベルを
知り、それに対応した非直線歪み成分を生み出して制御
回路８では振幅的に最高の補償特性を生み出すべく可変
減衰器４を駆動して非直線歪み発生回路６への入力信号
を制御する。また、電力増幅器１０の動作レベルを知る
ことによってその動作レベルにおける絶対位相変化量が
検出される。従って、この位相変化量にもとづいて制御
回路８で可変位相器５を駆動することによって非直線歪
み発生回路６で生み出される非直線歪みの絶対位相を調
整し２合成時の位相差を精確に逆相とすることに↓りで
位相的に最高の補償特性を得ることになる。In this case, it is clear that the best compensation characteristics can be obtained if the nonlinear distortion components are exactly equal in amplitude and exactly opposite in phase. Therefore, in the present invention, the power level detection circuit 7 detects the magnitude of the power level of the input signal to know the operating level of the power amplifier 10, and the control circuit 8 generates a nonlinear distortion component corresponding to the operating level of the power amplifier 10. The input signal to the nonlinear distortion generation circuit 6 is controlled by driving the variable attenuator 4 to produce compensation characteristics. Furthermore, by knowing the operating level of the power amplifier 10, the amount of absolute phase change at that operating level can be detected. Therefore, by driving the variable phase shifter 5 with the control circuit 8 based on this amount of phase change, the absolute phase of the nonlinear distortion generated by the nonlinear distortion generating circuit 6 is adjusted, and the phase difference at the time of combining the two is accurately reversed. The best compensation characteristic in terms of phase can be obtained by setting the phase to ↓.
以上説明した様に１本発明は、電力増幅器の非直線歪み
補償回路において、非直線歪み発生回路からの非直線歪
み信号を電力増幅器への入力信号に合成する際にその振
幅・位相両面における特性を電力増幅器の動作レベルに
対応して可変することによって、入力信号の電力レベル
の如何にかかわらず常に最良の補償特性を得ることが可
能となる。As explained above, the present invention provides characteristics in both amplitude and phase when combining a nonlinear distortion signal from a nonlinear distortion generation circuit with an input signal to the power amplifier in a nonlinear distortion compensation circuit for a power amplifier. By varying this in accordance with the operating level of the power amplifier, it is possible to always obtain the best compensation characteristics regardless of the power level of the input signal.
第１図は本発明による非直線歪み補償回路の一実施例を
示す系統図、第２図は従来の非直線歪み補償回路の系統
図である。
２ 、３−・・方向性結合器、４・・・可変減衰器、５
・・・可変位相器、６・・・非直線歪み発生回路、７・
・・電力レベル検出回路、８・・・制御回路、９・・・
方向性結合器、１０・・・電力増幅器。
第２図FIG. 1 is a system diagram showing an embodiment of a nonlinear distortion compensation circuit according to the present invention, and FIG. 2 is a system diagram of a conventional nonlinear distortion compensation circuit. 2, 3--Directional coupler, 4... Variable attenuator, 5
...Variable phase shifter, 6...Nonlinear distortion generation circuit, 7.
...Power level detection circuit, 8...Control circuit, 9...
Directional coupler, 10...power amplifier. Figure 2
Claims (1)
岐された支線系の入力信号の電力レベルを検出する回路
と，該検出回路の信号により制御回路を通してあらかじ
め設定された減衰量及び位相量へ各々調整される可変減
衰器及び可変位相器と，これら可変減衰器及び可変位相
器を通過した入力信号に対応して非直線歪み信号を発生
する非直線歪み発生回路と，分岐された本線系信号に上
記非直線歪み信号を合成する合成回路とから構成される
電力増幅器用非直線歪み補償回路。1. A circuit that branches the input signal into the main line system and the branch line system, a circuit that detects the power level of the input signal of the branch line system, and an attenuation amount and phase amount that are set in advance through a control circuit based on the signal from the detection circuit. a variable attenuator and a variable phase shifter that are adjusted respectively to A nonlinear distortion compensation circuit for a power amplifier, comprising a synthesis circuit for synthesizing the nonlinear distortion signal with a signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61047460A JPH0797733B2 (en) | 1986-03-06 | 1986-03-06 | Non-linear distortion compensation circuit for power amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61047460A JPH0797733B2 (en) | 1986-03-06 | 1986-03-06 | Non-linear distortion compensation circuit for power amplifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62206905A true JPS62206905A (en) | 1987-09-11 |
| JPH0797733B2 JPH0797733B2 (en) | 1995-10-18 |
Family
ID=12775770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61047460A Expired - Fee Related JPH0797733B2 (en) | 1986-03-06 | 1986-03-06 | Non-linear distortion compensation circuit for power amplifier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0797733B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02131606A (en) * | 1988-11-12 | 1990-05-21 | Nec Corp | Nonlinear compensation circuit |
| JPH08265052A (en) * | 1995-03-20 | 1996-10-11 | Fukushima Nippon Denki Kk | Distortion compensation device |
| JP2011160159A (en) * | 2010-01-29 | 2011-08-18 | Toshiba Corp | High frequency power amplifier and distortion compensation method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2005027340A1 (en) * | 2003-09-10 | 2007-11-08 | 株式会社日立国際電気 | Distortion compensation amplifier |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5573115A (en) * | 1978-11-27 | 1980-06-02 | Nec Corp | Traveling wave tube amplifying device |
| JPS5744246A (en) * | 1980-08-27 | 1982-03-12 | Pioneer Electronic Corp | Travel mode switching device of tape recorder |
| JPS6017936U (en) * | 1983-07-15 | 1985-02-06 | 株式会社日立製作所 | Direct drive type simple NC machine |
-
1986
- 1986-03-06 JP JP61047460A patent/JPH0797733B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5573115A (en) * | 1978-11-27 | 1980-06-02 | Nec Corp | Traveling wave tube amplifying device |
| JPS5744246A (en) * | 1980-08-27 | 1982-03-12 | Pioneer Electronic Corp | Travel mode switching device of tape recorder |
| JPS6017936U (en) * | 1983-07-15 | 1985-02-06 | 株式会社日立製作所 | Direct drive type simple NC machine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02131606A (en) * | 1988-11-12 | 1990-05-21 | Nec Corp | Nonlinear compensation circuit |
| JPH08265052A (en) * | 1995-03-20 | 1996-10-11 | Fukushima Nippon Denki Kk | Distortion compensation device |
| JP2011160159A (en) * | 2010-01-29 | 2011-08-18 | Toshiba Corp | High frequency power amplifier and distortion compensation method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0797733B2 (en) | 1995-10-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5619168A (en) | Distortion creation and reduction circuit | |
| EP0526241B1 (en) | Linear compensating circuit | |
| JPH07101820B2 (en) | Low distortion high frequency amplifier | |
| KR100425385B1 (en) | A Method of reducing distortion and a distortion reduction system | |
| JPH0552084B2 (en) | ||
| JPS62206905A (en) | Nonlinear distortion compensation circuit for power amplifier | |
| KR900702641A (en) | Apparatus for correcting phase induced by class C operation of solid state amplifier and radar system using the apparatus | |
| JPS6282804A (en) | Power amplifier device | |
| JPH06132736A (en) | Linear transmission device | |
| JP2788865B2 (en) | Distortion compensator | |
| JP3367745B2 (en) | Distortion compensator | |
| JPH0254607A (en) | Amplifier | |
| JPS60171831A (en) | Cross modulation compensating device | |
| JPH05235648A (en) | Phase compensation circuit for power amplifier | |
| JPS62193403A (en) | Distortion generating circuit | |
| JPH052443U (en) | Power combiner FET amplifier | |
| JPH03195204A (en) | Low distortion high frequency amplifier circuit | |
| JPS5817712A (en) | Automatic tracking type nonlinear compensation system | |
| JPH0511531U (en) | Power combiner FET amplifier | |
| JPH0447804A (en) | Distortion compensating circuit | |
| JPH0528112U (en) | Power amplifier | |
| JPH03171927A (en) | Transmission output control circuit | |
| JP2000307353A (en) | High frequency amplifier | |
| JPH0210902A (en) | Distortion compensation device | |
| JPH01276807A (en) | Linearity compensating amplifier circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |