JPH02159805A - Nonlinear compensator - Google Patents
Nonlinear compensatorInfo
- Publication number
- JPH02159805A JPH02159805A JP31529688A JP31529688A JPH02159805A JP H02159805 A JPH02159805 A JP H02159805A JP 31529688 A JP31529688 A JP 31529688A JP 31529688 A JP31529688 A JP 31529688A JP H02159805 A JPH02159805 A JP H02159805A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- nonlinear compensation
- attenuation
- compensation circuit
- high frequency
- 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.)
- Pending
Links
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 230000032683 aging Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Landscapes
- Amplifiers (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はマイクロ波帯電力増幅器に付加する非線形補償
回路と線形回路との切替機能を有する非線形補償装置に
関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a nonlinear compensation device that is added to a microwave band power amplifier and has a switching function between a nonlinear compensation circuit and a linear circuit.
従来、マイクロ波帯電力増幅器の歪を補償するために非
線形補償回路を用いているが、マイクロ波電力増幅器あ
るいは非線形補償回路が経年変化などによって総合特性
が劣化し、マイクロ波帯電力増幅器のみによる伝送を行
ないたい場合、線形回路に切替えることにより、マイク
ロ波帯電力増幅器をそのまま活用し、通信を確保するこ
とが可能である。このような非線形補償回路と線形回路
との切替えは、第3図のブロック図に示すように非線形
補償回路23とこれをバイパスする線形回路24を設け
、これらを切替えることによって行なっていた。第3図
において入力端子20より入力した信号は同軸スイッチ
22により切替えられ非線形補償回路23あるいは線形
回路24を経て出力端子21より出力される。Conventionally, nonlinear compensation circuits have been used to compensate for distortion in microwave power amplifiers, but the overall characteristics of the microwave power amplifiers or nonlinear compensation circuits have deteriorated due to aging, etc., and transmission using only microwave power amplifiers has become difficult. If you want to do this, by switching to a linear circuit, you can use the microwave band power amplifier as is and secure communication. Such switching between the nonlinear compensation circuit and the linear circuit is accomplished by providing a nonlinear compensation circuit 23 and a linear circuit 24 that bypasses the nonlinear compensation circuit 23, as shown in the block diagram of FIG. 3, and switching between them. In FIG. 3, a signal input from an input terminal 20 is switched by a coaxial switch 22, passes through a nonlinear compensation circuit 23 or a linear circuit 24, and is output from an output terminal 21.
上述した従来の非線形補償回路と線形回路との切替は、
高周波信号の切替を行うので、同軸スイッチを使用して
いる。また、同軸スイッチから線形回路への配線が非線
形補償回路を迂回するために切替系を含めた装置全体の
形状が大きくなり、重くなるという欠点がある。また、
切替時の高周波信号伝送の信頼度も劣化するという欠点
もある。Switching between the conventional nonlinear compensation circuit and the linear circuit described above is as follows:
A coaxial switch is used to switch high frequency signals. Furthermore, since the wiring from the coaxial switch to the linear circuit bypasses the nonlinear compensation circuit, there is a drawback that the entire device including the switching system becomes larger and heavier. Also,
Another drawback is that the reliability of high-frequency signal transmission during switching also deteriorates.
本発明の非線形補償装置は、高周波信号を2つの分岐信
号に分配する分岐回路と、前記分岐信号の一つを入力し
歪の補償を行なう非線形補償回路と、前記分岐信号の他
の一つを入力し、制御信号により減衰量を変化させる可
変減衰器ならびに高周波増幅器のうち少なくとも前記可
変減衰器を有する線形回路と、前記非線形補償回路およ
び前記線形回路の各出力信号を合成する合成回路とを備
え、前記制御信号が外部から印加され減衰量を零または
所定減衰量とするか、または前記制御信号が前記非線形
補償回路から印加され減衰量を零または所定減衰量とす
るか、いずれかで構成されている。The nonlinear compensation device of the present invention includes a branch circuit that divides a high frequency signal into two branch signals, a nonlinear compensation circuit that inputs one of the branch signals and compensates for distortion, and a nonlinear compensation circuit that inputs one of the branch signals and compensates for distortion. A linear circuit having at least the variable attenuator of a variable attenuator and a high frequency amplifier that input and change the amount of attenuation according to a control signal, and a synthesizing circuit that synthesizes each output signal of the nonlinear compensation circuit and the linear circuit. , the control signal is applied from the outside to set the attenuation to zero or a predetermined attenuation, or the control signal is applied from the nonlinear compensation circuit to set the attenuation to zero or a predetermined attenuation. ing.
次に本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.
第1図は本発明の第1の実施例のブロック図である。第
1の実施例は、高周波信号の入力端子20、入力された
高周波信号を分岐比の異なる大きい電力と小さい電力と
の2つの高周波信号に分岐する分岐器1、分岐器1の大
きい方の電力を入力し、減衰量を制御できる可変減衰器
2、分岐器1の小さい方の電力を入力し、高周波信号の
歪を補償する非線形補償回路4、可変減衰器2および非
線形補償回路23の出力を合成する分岐器1の分岐比と
同じ分岐比を有する合成器3、この合成出力を取り出す
出力端子21から構成される。ここで可変減衰器2は外
部端子か、らの制御信号により可変のバイアス電流をP
INダイオードに印加して、高周波信号の減衰量を変え
ることができる。FIG. 1 is a block diagram of a first embodiment of the present invention. The first embodiment includes a high-frequency signal input terminal 20, a splitter 1 that branches the input high-frequency signal into two high-frequency signals of high power and low power with different branching ratios, and a larger power of the splitter 1. , input the smaller power of the variable attenuator 2 that can control the amount of attenuation, and the brancher 1, and output the outputs of the nonlinear compensation circuit 4, the variable attenuator 2, and the nonlinear compensation circuit 23 that compensate for the distortion of the high frequency signal. It is composed of a combiner 3 having the same branching ratio as that of the combining splitter 1, and an output terminal 21 from which the combined output is taken out. Here, variable attenuator 2 outputs a variable bias current to P by a control signal from an external terminal.
It can be applied to an IN diode to change the amount of attenuation of high frequency signals.
また、非線形補償回路4はこの回路への電圧のオン・オ
フにより本回路を動作・非動作とすることができる。本
実施例の動作は、非線形補償回路4がオンのときには可
変減衰器2のPINダイオードにバイアス電流が流れ減
衰量が大きく取れるようにし、非線形補償回路4がオフ
のときにはPINダイオードのバイアス電流が零となり
減衰量が最小となるようにしておく、すなわち、入力端
子20と出力端子21間は非線形補償回路4または減衰
量が零の可変減衰器4かいずれかの回路で結合されてい
るので、高周波信号の瞬断のない装置が得られる。なお
、分岐器11合成器3の分岐および合成比は本実施例で
はバイパス回路を主たる動作とするために可変減衰器2
の方に大きい電力を供給する方式としたが、その逆の構
成も可能である。Furthermore, the nonlinear compensation circuit 4 can operate or disable the circuit by turning on/off a voltage to this circuit. The operation of this embodiment is such that when the nonlinear compensation circuit 4 is on, a bias current flows through the PIN diode of the variable attenuator 2 to obtain a large amount of attenuation, and when the nonlinear compensation circuit 4 is off, the bias current of the PIN diode is zero. In other words, the input terminal 20 and the output terminal 21 are coupled by either the nonlinear compensation circuit 4 or the variable attenuator 4 with zero attenuation, so that the attenuation is minimized. A device without momentary signal interruption can be obtained. In addition, in this embodiment, the branching and combining ratio of the splitter 11 and combiner 3 is determined by the variable attenuator 2 in order to mainly operate the bypass circuit.
Although we have adopted a method in which a larger amount of power is supplied to the other side, the opposite configuration is also possible.
本実施例の応用例として、可変減衰器2のバイアス線5
を非線形補償回路4との間に設けて、非線形補償回路4
内に設けられたバイアス電源からバイアス電流が供給さ
れる。このような構成の回路では歪補償回路自体の電源
をオフにすることにより自動的に可変減衰器2のバイア
ス電流がオフになって減衰量は最小となる。As an application example of this embodiment, the bias line 5 of the variable attenuator 2
is provided between the nonlinear compensation circuit 4 and the nonlinear compensation circuit 4.
A bias current is supplied from a bias power supply provided inside. In a circuit having such a configuration, by turning off the power of the distortion compensation circuit itself, the bias current of the variable attenuator 2 is automatically turned off, and the amount of attenuation is minimized.
次に、本発明の第2の実施例について説明する。第2図
は本発明の第2の実施例のブロック図である。この回路
では可変減衰器2に直列に増幅器6を追加している以外
は第1の実施例と同一の構成である。増幅器6を追加す
ることにより、可変減衰器2の減衰量を零としたバイパ
スのみでなく、利得を有する線形回路を形成することも
できる。Next, a second embodiment of the present invention will be described. FIG. 2 is a block diagram of a second embodiment of the invention. This circuit has the same configuration as the first embodiment except that an amplifier 6 is added in series with the variable attenuator 2. By adding the amplifier 6, it is possible to form not only a bypass in which the amount of attenuation of the variable attenuator 2 is zero, but also a linear circuit having a gain.
以上説明したように本発明は、非線形補償回路と可変減
衰器を並列に設け、可変減衰器を電子的に制御すること
により非線形補償回路と線形回路への移行を瞬断なく容
易に行なうことができる効果がある。また同軸スイッチ
を使用しないため小型・軽量化でき、かつ信頼度を高く
できる効果がある。As explained above, the present invention provides a nonlinear compensation circuit and a variable attenuator in parallel, and electronically controls the variable attenuator, thereby making it possible to easily transition to a nonlinear compensation circuit and a linear circuit without momentary interruption. There is an effect that can be done. In addition, since no coaxial switch is used, it can be made smaller and lighter, and has the effect of increasing reliability.
第1図は本発明の第1の実施例のブロック図、第2図は
本発明の第2の実施例のブロック図、第3図は従来の非
線形補償装置のブロック図である。。
1・・・分岐器、2・・・可、変減衰器、3・・・合成
器、4・・・非線形補償回路、5・・・バイアス線、6
・・・増幅器、20・・・入力端子、21・・・出力端
子、22・・・同軸スイッチ、23・・・非線形補償回
路、24・・・線形回路。FIG. 1 is a block diagram of a first embodiment of the present invention, FIG. 2 is a block diagram of a second embodiment of the present invention, and FIG. 3 is a block diagram of a conventional nonlinear compensator. . DESCRIPTION OF SYMBOLS 1... Brancher, 2... Variable attenuator, 3... Combiner, 4... Nonlinear compensation circuit, 5... Bias line, 6
...Amplifier, 20...Input terminal, 21...Output terminal, 22...Coaxial switch, 23...Nonlinear compensation circuit, 24...Linear circuit.
Claims (1)
記分岐信号の一つを入力し歪の補償を行なう非線形補償
回路と、前記分岐信号の他の一つを入力し、制御信号に
より減衰量を変化させる可変減衰器ならびに高周波増幅
器のうち少なくとも前記可変減衰器を有する線形回路と
、前記非線形補償回路および前記線形回路の各出力信号
を合成する合成回路とを備え、前記制御信号が外部から
印加され減衰量を零または所定減衰量とするか、または
前記制御信号が前記非線形補償回路から印加され減衰量
を零または所定減衰量とするか、いずれかで構成された
ことを特徴とする非線形補償装置。A branch circuit that divides a high frequency signal into two branch signals, a nonlinear compensation circuit that inputs one of the branch signals and compensates for distortion, and a nonlinear compensation circuit that inputs the other branch signal and adjusts the amount of attenuation according to a control signal. A linear circuit having at least the variable attenuator among a variable attenuator and a high frequency amplifier that changes the attenuation amount is zero or a predetermined attenuation amount, or the control signal is applied from the nonlinear compensation circuit and the attenuation amount is zero or a predetermined attenuation amount. Device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP31529688A JPH02159805A (en) | 1988-12-13 | 1988-12-13 | Nonlinear compensator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP31529688A JPH02159805A (en) | 1988-12-13 | 1988-12-13 | Nonlinear compensator |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH02159805A true JPH02159805A (en) | 1990-06-20 |
Family
ID=18063689
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP31529688A Pending JPH02159805A (en) | 1988-12-13 | 1988-12-13 | Nonlinear compensator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH02159805A (en) |
-
1988
- 1988-12-13 JP JP31529688A patent/JPH02159805A/en active Pending
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