JPH0537263A - Fixed amplitude wave synthesis type amplifier - Google Patents
Fixed amplitude wave synthesis type amplifierInfo
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- JPH0537263A JPH0537263A JP3212741A JP21274191A JPH0537263A JP H0537263 A JPH0537263 A JP H0537263A JP 3212741 A JP3212741 A JP 3212741A JP 21274191 A JP21274191 A JP 21274191A JP H0537263 A JPH0537263 A JP H0537263A
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- Japan
- Prior art keywords
- wave
- constant amplitude
- amplitude
- circuit
- waves
- Prior art date
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はＬＩＮＣ（Linear Ampli
fication with Nonlinear Components) 方式の定振幅
波合成形増幅器に関する。定振幅波合成形増幅器は低歪
かつ高効率電力の増幅器であり、例えば移動通信用無線
装置、多重無線装置、衛星通信無線装置、あるいは放送
機器等の各種通信装置に適用されている。The present invention relates to a LINC (Linear Ampli
fication with Nonlinear Components) constant-amplitude wave synthesis amplifier. The constant amplitude wave synthesizing amplifier is a low-distortion and high-efficiency power amplifier, and is applied to various communication devices such as mobile communication wireless devices, multiplex wireless devices, satellite communication wireless devices, and broadcasting equipment.
【０００２】[0002]
【従来の技術】従来、低歪かつ高効率を達成できる電力
増幅器としてＬＩＮＣ方式を用いた定振幅波合成形増幅
器が知られている。この定振幅波合成形増幅器の原理は
ベル研究所のＤ．Ｃ．ＣＯＸによって提案されたもの
で、ＩＥＥＥ、ＣＯＭ−２２、Ｐ１９４２等に開示され
ている。また応用例として、富里等の方式が特開平１−
２８４１０６号公報等に開示されている。2. Description of the Related Art Conventionally, a constant-amplitude wave combination type amplifier using the LINC system is known as a power amplifier capable of achieving low distortion and high efficiency. The principle of this constant-amplitude wave synthesis type amplifier is based on D.L. C. It was proposed by COX and is disclosed in IEEE, COM-22, P1942 and the like. As an application example, the method of Tomisato et al.
It is disclosed in Japanese Patent No. 284106.
【０００３】図６には、従来の定振幅波合成形増幅器の
構成例が示される。同図において、１は定振幅波発生回
路であり、入力された信号波Ｘと直交しかつ信号波Ｘと
の合成波が定振幅となるような補助波Ｙを演算等により
発生して、この信号波Ｘと補助波Ｙを合成することで定
包絡線の等振幅な二つの定振幅波Ａ、Ｂを発生し出力す
る。ここで英大文字のＸ、Ｙ、Ａ、Ｂは位相を含むベク
トル量を表すものとする。かかる定振幅波発生回路１と
しては、ディジタル演算処理回路による方法や、例えば
本出願人に係る特願平２−２７６９８号で提案される帰
還ループを用いた方法、特願平２−２７６９９号で提案
される近似解回路を用いた方法、あるいは特願平２７７
７００号で提案される電圧制御発振器を用いた方法な
ど、種々の回路構成が可能である。FIG. 6 shows a configuration example of a conventional constant amplitude wave synthesis type amplifier. In the figure, reference numeral 1 denotes a constant amplitude wave generation circuit, which generates an auxiliary wave Y that is orthogonal to the input signal wave X and that has a constant amplitude as a composite wave of the signal wave X. By synthesizing the signal wave X and the auxiliary wave Y, two constant amplitude waves A and B having constant envelope and equal amplitude are generated and output. Here, capital letters X, Y, A, and B represent vector quantities including phases. As the constant amplitude wave generating circuit 1, a method using a digital arithmetic processing circuit, a method using a feedback loop proposed in Japanese Patent Application No. 2-27698 related to the present applicant, and Japanese Patent Application No. 2-27699 are used. Method using the proposed approximate solution circuit, or Japanese Patent Application No. 277
Various circuit configurations are possible, such as the method using the voltage-controlled oscillator proposed in No. 700.
【０００４】３、４は定振幅波発生回路１の二つの定振
幅波Ａ、Ｂをそれぞれ別々に一定の増幅率ｋで増幅する
増幅器であり、Ｃ級増幅器等の高効率な非線形増幅器が
使用される動作点は，効率がよい飽和領域で使用する。
２は−９０°ハイブリッド回路からなる合成回路であ
り、増幅器３、４で増幅後の定振幅波ｋＡ，ｋＢをベク
トル合成して信号波Ｘの増幅出力として信号波成分ｋＸ
と補助波成分ｋＹとを分離する。Reference numerals 3 and 4 denote amplifiers for separately amplifying the two constant amplitude waves A and B of the constant amplitude wave generating circuit 1, respectively, with a constant amplification factor k, and a highly efficient nonlinear amplifier such as a class C amplifier is used. The operating point to be used is in the efficient saturation region.
Reference numeral 2 denotes a combining circuit composed of a -90 ° hybrid circuit, which performs vector combination of the constant amplitude waves kA and kB after being amplified by the amplifiers 3 and 4, and outputs a signal wave component kX as an amplified output of the signal wave X.
And the auxiliary wave component kY are separated.
【０００５】この定振幅波合成形増幅器の動作を説明す
ると、信号波Ｘが入力されると、定振幅波発生回路１は
この信号波Ｘと直交する補助波Ｙを生成してベクトル合
成することで、包絡線が等振幅の二つの定振幅波Ａ、Ｂ
を生成し出力する。これら定振幅波Ａ、Ｂは次に増幅器
３、４でそれぞれｋ倍に増幅されてｋＡ、ｋＢとされ、
合成回路２にそれぞれ入力される。The operation of this constant amplitude wave synthesizing amplifier will be described. When the signal wave X is input, the constant amplitude wave generating circuit 1 generates an auxiliary wave Y orthogonal to this signal wave X and vector-synthesizes it. And two constant amplitude waves A and B whose envelopes are of equal amplitude
Is generated and output. These constant amplitude waves A and B are then amplified by k times by amplifiers 3 and 4 to be kA and kB,
It is input to each synthesis circuit 2.
【０００６】合成回路２では入力された定振幅波ｋＡ、
ｋＢをベクトル合成する。すなわち出力端子ＯＵＴ１で
は、定振幅波ｋＡと−９０度位相回転した定振幅波ｋＢ
とを合成して補助波成分ｋＹをキャンセルしつつ信号波
成分ｋＸを得る。また出力端子ＯＵＴ２では定振幅波ｋ
Ｂと−９０度位相回転した定振幅波ｋＡとを合成して、
信号波成分ｋＸをキャンセルしつつ補助波成分ｋＹを分
離し、この補助波成分を終端抵抗５で終端する。In the synthesizing circuit 2, the input constant amplitude wave kA,
Vector-synthesize kB. That is, at the output terminal OUT1, the constant amplitude wave kA and the constant amplitude wave kB whose phase is rotated by −90 degrees are provided.
And are combined to cancel the auxiliary wave component kY and obtain the signal wave component kX. At the output terminal OUT2, a constant amplitude wave k
B and the constant-amplitude wave kA whose phase is rotated by −90 degrees are combined,
The auxiliary wave component kY is separated while canceling the signal wave component kX, and this auxiliary wave component is terminated by the terminating resistor 5.
【０００７】この定振幅波合成形増幅器においては、増
幅器３、４は定包絡線の定振幅波Ａ、Ｂを増幅するだけ
のものであるから、線形増幅器を用いる必要はなく、Ｃ
級等の高効率な非線形増幅器を最大効率が得られる飽和
領域で使用することができ、しかも出力側の合成回路２
で元の信号が復元できるから、非線形増幅器によりなが
らも歪が少なく直線性の良い増幅が可能である。このよ
うに定振幅波合成形増幅器は非線形増幅器を用いて高効
率、低歪の増幅器を実現できるものである。In this constant amplitude wave synthesis type amplifier, since the amplifiers 3 and 4 only amplify the constant amplitude waves A and B of the constant envelope, it is not necessary to use a linear amplifier, and C
High-efficiency non-linear amplifier such as class can be used in the saturation region where maximum efficiency is obtained, and the output side synthesis circuit 2
Since the original signal can be restored by, the distortion can be reduced and the linearity can be improved even though the nonlinear amplifier is used. As described above, the constant amplitude wave synthesis type amplifier can realize a high efficiency and low distortion amplifier by using a non-linear amplifier.
【０００８】[0008]
【発明が解決しようとする課題】上述したように、定振
幅波合成形増幅器では、ある倍率に増幅された信号波Ｘ
を出力側で取り出すためには、入力側の定振幅波発生回
路１で定振幅波を発生するために加えた補助波Ｙを合成
回路２において取り除く必要がある。この場合、二つの
増幅器３、４のＡＭ（振幅変調）／ＰＭ（位相変調）変
換の偏差が等しく出力レベルが等しい場合には、合成回
路２において信号波成分を分離する際に補助波が完全に
キャンセルされて信号波成分には補助波の漏れ込みがな
く、よって歪みなく信号波を増幅することができる。As described above, in the constant amplitude wave synthesis type amplifier, the signal wave X amplified to a certain magnification is used.
In order to take out the signal on the output side, it is necessary to remove on the combining circuit 2 the auxiliary wave Y added to generate the constant amplitude wave on the input side constant amplitude wave generation circuit 1. In this case, when the AM (amplitude modulation) / PM (phase modulation) conversion deviations of the two amplifiers 3 and 4 are equal and the output levels are equal, the auxiliary wave is completely removed when the signal wave component is separated in the synthesizing circuit 2. Since the signal wave component is canceled by, the auxiliary wave does not leak into the signal wave component, so that the signal wave can be amplified without distortion.
【０００９】ところが、増幅器３、４において偏差およ
び出力レベルが等しくないと、合成回路２において信号
波成分を分離するために理想的な演算が行えなくなり、
補助波成分が信号波成分中に漏れ込み、出力された信号
波に歪みが発生する。However, if the deviations and the output levels in the amplifiers 3 and 4 are not equal, an ideal calculation cannot be performed because the signal wave components are separated in the synthesizing circuit 2.
The auxiliary wave component leaks into the signal wave component and the output signal wave is distorted.
【００１０】本発明はかかる問題点に鑑みてなされたも
のであり、その目的とするところは、二つの増幅器で発
生するＡＭ／ＰＭ変換の偏差と出力レベル差に起因して
増幅信号波に発生する歪みを低減させることにある。The present invention has been made in view of the above problems, and an object of the present invention is to generate an amplified signal wave due to an AM / PM conversion deviation and an output level difference generated in two amplifiers. It is to reduce the distortion.
【００１１】[0011]
【課題を解決するための手段】図１は本発明に係る原理
説明図である。本発明に係る定振幅波合成形増幅器は、
図１の〔Ａ〕に示されるように、一つの形態として、信
号波とこれに直交する補助波とをベクトル合成して二つ
の定振幅波を発生する定振幅波発生回路３１と、二つの
定振幅波をそれぞれ増幅する二つの増幅器３２、３３
と、二つの増幅器の３２、３３出力をベクトル合成する
ことで信号波成分を分離する合成回路３４と、合成回路
３４に入力される二つの定振幅波の振幅差を検出する振
幅差検出器３５と、振幅差検出器３５で検出された振幅
差を無くすように二つの定振幅波の少なくとも一方の振
幅を減衰させる可変減衰器３６とを備えたものである。FIG. 1 is an explanatory view of the principle of the present invention. The constant amplitude wave synthesis type amplifier according to the present invention,
As shown in [A] of FIG. 1, as one form, a constant amplitude wave generation circuit 31 for generating two constant amplitude waves by vector-synthesizing a signal wave and an auxiliary wave orthogonal thereto, and two Two amplifiers 32 and 33 for amplifying constant amplitude waves respectively
, A combination circuit 34 for separating the signal wave components by vector combining the 32 and 33 outputs of the two amplifiers, and an amplitude difference detector 35 for detecting the amplitude difference between the two constant amplitude waves input to the combination circuit 34. And a variable attenuator 36 that attenuates the amplitude of at least one of the two constant amplitude waves so as to eliminate the amplitude difference detected by the amplitude difference detector 35.
【００１２】また本発明に係る定振幅波合成形増幅器
は、図１の〔Ａ〕に示されるように、他の形態として、
信号波とこれに直交する補助波とをベクトル合成して二
つの定振幅波を発生する定振幅波発生回路３１と、二つ
の定振幅波をそれぞれ増幅する二つの増幅器３２、３３
と、二つの増幅器３２、３３の出力をベクトル合成する
ことで信号波成分を分離する合成回路３４と、合成回路
３４に入力される二つの定振幅波の位相差を検出する位
相検出器３７と、位相検出器３７で検出された位相差に
基づき二つの増幅器３２、３３で発生する位相偏差を無
くすように二つの定振幅波の少なくとも一方の位相を変
える可変移相器３８とを備えたものである。Further, the constant amplitude wave synthesis type amplifier according to the present invention, as shown in FIG.
A constant amplitude wave generation circuit 31 for generating two constant amplitude waves by vector-synthesizing a signal wave and an auxiliary wave orthogonal thereto, and two amplifiers 32, 33 for amplifying the two constant amplitude waves, respectively.
And a combining circuit 34 for separating the signal wave components by combining the outputs of the two amplifiers 32 and 33 with a vector, and a phase detector 37 for detecting the phase difference between the two constant amplitude waves input to the combining circuit 34. , A variable phase shifter 38 for changing the phase of at least one of the two constant amplitude waves so as to eliminate the phase deviation generated in the two amplifiers 32, 33 based on the phase difference detected by the phase detector 37. Is.
【００１３】また本発明に係る定振幅波合成形増幅器
は、図１の〔Ｂ〕に示されるように、また他の形態とし
て、信号波とこれに直交する補助波とをベクトル合成し
て二つの定振幅波を発生する定振幅波発生回路３１と、
二つの定振幅波をそれぞれ増幅する二つの増幅器３２、
３３と、二つの増幅器３２、３３の出力をベクトル合成
することで信号波成分と補助波成分を分離する合成回路
３４と、合成回路３４から出力される補助波成分を増幅
器３２、３３の増幅率分の１に減衰させる減衰器４１
と、減衰器４１から出力される補助波成分と定振幅波発
生回路３１で用いた補助波との振幅差を検出する振幅差
検出器４０と、振幅差検出器４０で検出された振幅差を
無くすように二つの定振幅波の少なくとも一方の振幅を
減衰させる可変減衰器３６とを備えたものである。The constant-amplitude wave combination type amplifier according to the present invention, as shown in FIG. 1B, and as another form, performs vector combination of a signal wave and an auxiliary wave orthogonal thereto, and outputs the two signals. A constant amplitude wave generation circuit 31 for generating two constant amplitude waves,
Two amplifiers 32 for respectively amplifying two constant amplitude waves,
33, a combining circuit 34 for separating the signal wave component and the auxiliary wave component by vector combining the outputs of the two amplifiers 32, 33, and the amplification factor of the amplifiers 32, 33 for the auxiliary wave component output from the combining circuit 34. Attenuator 41 that attenuates to one-half
And an amplitude difference detector 40 for detecting the amplitude difference between the auxiliary wave component output from the attenuator 41 and the auxiliary wave used in the constant amplitude wave generation circuit 31, and the amplitude difference detected by the amplitude difference detector 40. A variable attenuator 36 for attenuating the amplitude of at least one of the two constant amplitude waves so as to be eliminated.
【００１４】また本発明る係る定振幅波合成形増幅器
は、図１の〔Ｂ〕に示されるように、さらに他の形態と
して、信号波とこれに直交する補助波とをベクトル合成
して二つの定振幅波を発生する定振幅波発生回路３１
と、二つの定振幅波をそれぞれ増幅する二つの増幅器３
２、３３と、二つの増幅器３２、３３の出力をベクトル
合成することで信号波成分と補助波成分を分離する合成
回路３４と、合成回路３４から出力される補助波成分と
定振幅波発生回路３１で用いた補助波との位相差を検出
する位相検出器３９と、位相検出器３９で検出された位
相差に基づき二つの増幅器３２、３３で発生する位相偏
差を無くすように二つの定振幅波の少なくとも一方の位
相を変える可変移相器３８とを備えたものである。As shown in FIG. 1B, the constant-amplitude wave combination type amplifier according to the present invention is, as yet another form, a vector combination of a signal wave and an auxiliary wave orthogonal to the signal wave. Constant amplitude wave generation circuit 31 for generating two constant amplitude waves
And two amplifiers 3 for amplifying two constant amplitude waves respectively
2, 33 and a combining circuit 34 for separating the signal wave component and the auxiliary wave component by vector combining the outputs of the two amplifiers 32, 33, and the auxiliary wave component and the constant amplitude wave generating circuit output from the combining circuit 34. The phase detector 39 for detecting the phase difference from the auxiliary wave used in 31 and two constant amplitudes so as to eliminate the phase deviation generated in the two amplifiers 32, 33 based on the phase difference detected by the phase detector 39. And a variable phase shifter 38 that changes the phase of at least one of the waves.
【００１５】[0015]
【作用】１番目の定振幅波合成形増幅器では、振幅差検
出器３５によって増幅器３２、３３の出力信号の振幅レ
ベル差を検出し、それがゼロとなるように定振幅波の振
幅を可変減衰器３６によって調整する。これにより合成
回路３４に入力される定振幅波は等振幅となり、信号波
成分の分離にあたって信号波成分中に漏れ込む補助波成
分を抑圧でき、低歪みでの増幅が可能となる。In the first constant amplitude wave synthesizing amplifier, the amplitude difference detector 35 detects the amplitude level difference between the output signals of the amplifiers 32 and 33, and the amplitude of the constant amplitude wave is variably attenuated so that it becomes zero. Adjust with the instrument 36. As a result, the constant amplitude wave input to the synthesizing circuit 34 becomes equal in amplitude, the auxiliary wave component leaking into the signal wave component when separating the signal wave component can be suppressed, and amplification with low distortion becomes possible.
【００１６】上記２番目の定振幅波合成形増幅器では、
位相検出器３７によって増幅器３２、３３の出力信号の
位相差を検出し、この位相差に基づいて、増幅器３２、
３３で発生する位相偏差が無くなるよう可変移相器３８
によって定振幅波の位相を調整する。これにより出力側
の信号波成分中に漏れ込む補助波成分を抑圧できる。In the second constant amplitude wave synthesizer type amplifier,
The phase detector 37 detects the phase difference between the output signals of the amplifiers 32 and 33, and based on this phase difference, the amplifier 32,
The variable phase shifter 38 eliminates the phase deviation generated in 33.
Adjust the phase of the constant amplitude wave by. This makes it possible to suppress the auxiliary wave component that leaks into the signal wave component on the output side.
【００１７】上記３番目の定振幅波合成形増幅器では、
振幅差検出器４０によって定振幅波発生回路３１で生成
される補助波と合成回路３４側で分離される補助波成分
を増幅器３２、３３の増幅率分の１にした値との振幅レ
ベル差を検出し、それがゼロとなるように定振幅波の振
幅を可変減衰器３６によって調整する。これにより合成
回路３４に入力される定振幅波は等振幅となり、信号波
成分の分離にあたって信号波成分中に漏れ込む補助波成
分を抑圧でき、低歪みでの増幅が可能となる。In the third constant amplitude wave synthesis type amplifier,
The amplitude level difference between the auxiliary wave generated by the constant amplitude wave generation circuit 31 by the amplitude difference detector 40 and the value obtained by dividing the auxiliary wave component separated on the synthesis circuit 34 side by one of the amplification factors of the amplifiers 32 and 33 is calculated. The amplitude of the constant amplitude wave is detected by the variable attenuator 36 so that it is detected. As a result, the constant amplitude wave input to the synthesizing circuit 34 becomes equal in amplitude, the auxiliary wave component leaking into the signal wave component when separating the signal wave component can be suppressed, and amplification with low distortion becomes possible.
【００１８】上記４番目の定振幅波合成形増幅器では、
位相検出器３９によって定振幅波発生回路３１で生成さ
れる補助波と合成回路３４で分離される補助波成分との
位相差を検出し、この位相差に基づいて、増幅器３２、
３３で発生する位相偏差が無くなるよう可変移相器３８
によって定振幅波の位相を調整する。これにより出力側
の信号波成分中に漏れ込む補助波成分を抑圧できる。In the fourth constant amplitude wave synthesizer type amplifier,
The phase detector 39 detects the phase difference between the auxiliary wave generated by the constant amplitude wave generating circuit 31 and the auxiliary wave component separated by the combining circuit 34, and based on this phase difference, the amplifier 32,
The variable phase shifter 38 eliminates the phase deviation generated in 33.
Adjust the phase of the constant amplitude wave by. This makes it possible to suppress the auxiliary wave component that leaks into the signal wave component on the output side.
【００１９】[0019]
【実施例】以下、図面を参照しつつ本発明の実施例を説
明する。なお以下の各図を通して同一機能を持つ回路要
素には同一の参照番号を付するものとする。Embodiments of the present invention will be described below with reference to the drawings. It should be noted that circuit elements having the same function are denoted by the same reference numerals throughout the following drawings.
【００２０】図２には本発明の一実施例としての定振幅
波合成形増幅器が示される。図中、定振幅波発生回路
１、合成回路２、増幅率ｋの高出力形の増幅器３と４、
５０Ω終端抵抗５は従来の技術の項で説明したものと同
じ回路である。FIG. 2 shows a constant amplitude wave combination type amplifier as an embodiment of the present invention. In the figure, a constant amplitude wave generation circuit 1, a synthesis circuit 2, high output type amplifiers 3 and 4 with an amplification factor k,
The 50Ω termination resistor 5 is the same circuit as described in the section of the related art.
【００２１】１１は電圧制御形の可変減衰器であり、定
振幅波Ａはこの可変減衰器１１と増幅器３を解して合成
回路２に入力される。増幅器３、４から出力される定振
幅波ｋＡ、ｋＢの大きさはそれぞれ検波器６、７で検出
されるように構成され、この検波器６、７の検波出力は
差動増幅器からなる引算器８に入力されてその振幅差が
求められる。引算器８は出力は更にループゲイン増幅器
９と低域フィルタからなるループフィルタ１０とを介し
て可変減衰器１１の制御入力端子に制御電圧として入力
されるように構成される。Reference numeral 11 is a voltage control type variable attenuator, and the constant amplitude wave A is input to the synthesis circuit 2 through the variable attenuator 11 and the amplifier 3. The magnitudes of the constant amplitude waves kA and kB output from the amplifiers 3 and 4 are configured to be detected by the detectors 6 and 7, respectively, and the detection outputs of the detectors 6 and 7 are subtracted by a differential amplifier. It is input to the instrument 8 and the amplitude difference is obtained. The output of the subtractor 8 is further input as a control voltage to the control input terminal of the variable attenuator 11 via a loop gain amplifier 9 and a loop filter 10 composed of a low pass filter.
【００２２】この実施例回路では、増幅器３、４から出
力される定振幅波ｋＡ、ｋＢはその大きさが検波器６、
７でそれぞれ検波され、その検波出力は引算器８で引算
され、それにより二つの増幅器３、４の出力振幅のレベ
ル差が検出される。このレベル差はループゲイン増幅器
９とループフィルタ１０を経て制御電圧として可変減衰
器１１に入力され、それにより可変減衰器１１は定振幅
波発生回路１から出力された定振幅波Ａの振幅を調整し
て二つの増幅器３、４の出力レベル差がゼロになるよう
にする。In the circuit of this embodiment, the magnitudes of the constant amplitude waves kA and kB output from the amplifiers 3 and 4 are the detector 6,
Each of them is detected at 7, and the detected output is subtracted at the subtracter 8, whereby the level difference between the output amplitudes of the two amplifiers 3 and 4 is detected. This level difference is input to the variable attenuator 11 as a control voltage via the loop gain amplifier 9 and the loop filter 10, whereby the variable attenuator 11 adjusts the amplitude of the constant amplitude wave A output from the constant amplitude wave generation circuit 1. Then, the output level difference between the two amplifiers 3 and 4 is set to zero.
【００２３】これにより合成回路２において信号波成分
ｋＸを分離する際に、合成回路２に入力される定振幅波
ｋＡ、ｋＢの振幅レベルに関してはレベル差がなくな
り、補助波成分をキャンセルする演算を行うにあたって
信号波成分中に漏れ込む補助波成分を抑圧することがで
き、出力される信号波の歪みを低減できる。As a result, when the signal wave component kX is separated in the synthesizing circuit 2, there is no level difference between the amplitude levels of the constant amplitude waves kA and kB input to the synthesizing circuit 2, and an operation for canceling the auxiliary wave component is performed. In doing so, the auxiliary wave component that leaks into the signal wave component can be suppressed, and the distortion of the output signal wave can be reduced.
【００２４】本発明の実施にあたっては種々の変形形態
が可能である。以下、これら種々の実施例について順に
説明する。Various modifications are possible in carrying out the present invention. Hereinafter, these various examples will be described in order.
【００２５】図３には本発明の他の実施例が示される。
この実施例では、定振幅波発生回路１からの定振幅波Ａ
を電圧制御形の可変移相器１７と増幅器３を介して合成
回路２に入力するようにしている。増幅器３、４から出
力される定振幅波ｋＡ、ｋＢはその一部がカップラー１
２、１３でそれぞれ分岐されてミクサー１４に入力され
る。これにより二つの増幅器３、４の出力信号の位相差
に応じた値のビート信号がミクサー１４から出力され、
この出力信号はループゲイン増幅器１５と低域フィルタ
からなるループゲインフィルタ１６とを介して制御電圧
として可変移相器１７の制御入力端子に入力される。こ
の可変移相器１７はＡＭ／ＰＭ変換により発生する二つ
の増幅器３、４の位相偏差を無くすように調整されてい
る。FIG. 3 shows another embodiment of the present invention.
In this embodiment, the constant amplitude wave A from the constant amplitude wave generation circuit 1 is used.
Is input to the combining circuit 2 via the voltage-controlled variable phase shifter 17 and the amplifier 3. Part of the constant amplitude waves kA and kB output from the amplifiers 3 and 4 is the coupler 1.
The signals are branched at 2 and 13 and input to the mixer 14. As a result, a beat signal having a value corresponding to the phase difference between the output signals of the two amplifiers 3 and 4 is output from the mixer 14,
This output signal is input to the control input terminal of the variable phase shifter 17 as a control voltage via the loop gain amplifier 15 and the loop gain filter 16 composed of a low pass filter. The variable phase shifter 17 is adjusted so as to eliminate the phase deviation between the two amplifiers 3 and 4 generated by the AM / PM conversion.
【００２６】この実施例回路の動作を説明すると、増幅
器３、４の出力信号の位相差に応じたビート信号がミク
サー１４で検出され、このビート信号をループゲイン増
幅器１５とループゲインフィルタ１６を経て制御電圧と
して可変移相器１７に入力し、増幅器３、４でのＡＭ／
ＰＭ変換により発生する二つの定振幅波ｋＡ、ｋＢ間の
位相偏差を無くすように可変移相器１７により定振幅波
Ａの位相をシフトするこれにより合成回路２における信
号波成分の分離に際し、信号波成分中に漏れ込む補助波
成分を抑圧して、出力される信号波の歪みの発生を低減
できる。Explaining the operation of the circuit of this embodiment, a beat signal corresponding to the phase difference between the output signals of the amplifiers 3 and 4 is detected by the mixer 14, and this beat signal is passed through the loop gain amplifier 15 and the loop gain filter 16. It is input to the variable phase shifter 17 as a control voltage, and AM /
The phase of the constant amplitude wave A is shifted by the variable phase shifter 17 so as to eliminate the phase deviation between the two constant amplitude waves kA and kB generated by the PM conversion. It is possible to suppress the auxiliary wave component leaking into the wave component and reduce the occurrence of distortion of the output signal wave.
【００２７】図４には本発明のまた他の実施例が示され
る。この実施例は上述の図２の実施例と図３の実施例を
組み合わせたものであり、可変減衰器１１と可変移相器
１７により合成回路２に入力される二つの定振幅波の位
相と振幅の双方に関して調整を行うようにしたものであ
る。これにより出力される信号波に発生する歪みを一層
低減することができる。FIG. 4 shows another embodiment of the present invention. This embodiment is a combination of the embodiment of FIG. 2 and the embodiment of FIG. 3 described above, and the phase of the two constant amplitude waves input to the combining circuit 2 by the variable attenuator 11 and the variable phase shifter 17 is The adjustment is performed with respect to both amplitudes. As a result, the distortion generated in the output signal wave can be further reduced.
【００２８】図５には本発明のさらに他の実施例が示さ
れる。この実施例回路では、定振幅波発生回路１からそ
こで生成した補助波Ｙを取り出してミクサ１４に入力
し、また合成回路２から出力される補助波成分ｋＹを１
／ｋに減衰する減衰器２０を介してミクサー１４に入力
し、このミクサー１４の出力をループゲイン増幅器１５
とループゲインフィルタ１６を介して可変移相器１７に
制御電圧として入力するよう構成する。また定振幅波発
生回路１からの補助波Ｙの大きさを検波器２１で検出し
て引算器８に入力し、一方、減衰器２０から出力される
補助波の大きさを検波器２２で検出して引算器８に入力
し、ここで両者の差をとる。この振幅差に応じた信号は
ループゲイン増幅器９とループフィルタ１０を介して可
変減衰器１１に制御電圧として入力されるよう構成され
る。FIG. 5 shows still another embodiment of the present invention. In the circuit of this embodiment, the auxiliary wave Y generated there is taken out from the constant amplitude wave generating circuit 1 and inputted to the mixer 14, and the auxiliary wave component kY outputted from the synthesizing circuit 2 is set to 1
It is input to the mixer 14 through the attenuator 20 that attenuates to / k, and the output of the mixer 14 is loop gain amplifier 15
And the variable phase shifter 17 via the loop gain filter 16 as a control voltage. Further, the magnitude of the auxiliary wave Y from the constant amplitude wave generating circuit 1 is detected by the detector 21 and input to the subtractor 8, while the magnitude of the auxiliary wave output from the attenuator 20 is detected by the detector 22. It is detected and input to the subtractor 8, and the difference between the two is calculated here. A signal corresponding to the amplitude difference is configured to be input as a control voltage to the variable attenuator 11 via the loop gain amplifier 9 and the loop filter 10.
【００２９】この実施例回路では、ミクサー１４の出力
において、二つの増幅器３、４のＡＭ／ＰＭ変換によっ
て生じた位相偏差が検出され、これがループゲイン増幅
器１５とループゲインフィルタ１６を介して可変移相器
１７に制御電圧として入力され、それにより位相偏差に
起因して発生する出力側の信号波の歪みが低減されるよ
うに可変移相器１７によって定振幅波Ａの位相が調整さ
れる。In the circuit of this embodiment, the phase deviation caused by the AM / PM conversion of the two amplifiers 3 and 4 is detected at the output of the mixer 14, and this is varied via the loop gain amplifier 15 and the loop gain filter 16. The variable phase shifter 17 adjusts the phase of the constant amplitude wave A so that distortion of the output-side signal wave generated due to the phase deviation is input to the phase shifter 17 as a control voltage.
【００３０】また検波器２１、２２の検波出力は引算器
８に入力されて増幅器３、４の出力信号のレベル変動値
が検出され、これがループゲイン増幅器９とループフィ
ルタ１０を介して可変減衰器１１に制御電圧として入力
され、それより出力レベル差に起因して発生する出力側
の信号波の歪みが低減されるように可変減衰器１１によ
って定振幅波Ａの振幅値が調整される。The detection outputs of the detectors 21 and 22 are input to the subtractor 8 to detect the level fluctuation value of the output signals of the amplifiers 3 and 4, which is variably attenuated via the loop gain amplifier 9 and the loop filter 10. The variable attenuator 11 adjusts the amplitude value of the constant amplitude wave A so that the distortion of the output-side signal wave generated due to the output level difference is reduced.
【００３１】なお、上述の図５の実施例回路では、可変
減衰器１１による振幅調整を可変移相器１７による位相
調整を同時に行う回路について述べたが、もちろん本発
明は可変減衰器１１のみを持つ回路、あるいは可変移相
器１７のみを持つ回路であってもよい。In the embodiment circuit of FIG. 5 described above, the circuit in which the amplitude adjustment by the variable attenuator 11 and the phase adjustment by the variable phase shifter 17 are performed at the same time is described, but of course, the present invention includes only the variable attenuator 11. It may be a circuit having the same or a circuit having only the variable phase shifter 17.
【００３２】[0032]
【発明の効果】以上に説明したように、本発明によれ
ば、出力側で分離される信号波に漏れ込む補助波成分を
抑圧して歪みの発生を低減できる。As described above, according to the present invention, it is possible to suppress the auxiliary wave component leaking into the signal wave separated at the output side and reduce the occurrence of distortion.
【図１】本発明に係る原理説明図である。FIG. 1 is a diagram illustrating the principle of the present invention.
【図２】本発明の一実施例としての定振幅波合成形増幅
器を示すブロック図である。FIG. 2 is a block diagram showing a constant amplitude wave combination type amplifier as one embodiment of the present invention.
【図３】本発明の他の実施例としての定振幅波合成形増
幅器を示すブロック図である。FIG. 3 is a block diagram showing a constant amplitude wave combination type amplifier as another embodiment of the present invention.
【図４】本発明のまた他の実施例としての定振幅波合成
形増幅器を示すブロック図である。FIG. 4 is a block diagram showing a constant amplitude wave combination type amplifier as another embodiment of the present invention.
【図５】本発明のさらに他の実施例としての定振幅波合
成形増幅器を示すブロック図である。FIG. 5 is a block diagram showing a constant-amplitude-wave synthesis amplifier as still another embodiment of the present invention.
【図６】従来例の定振幅波合成形増幅器を示すブロック
図である。FIG. 6 is a block diagram showing a conventional constant amplitude wave combining type amplifier.
１ 定振幅波発生回路 ２ 合成回路 ３、４ 増幅器 ５ ５０Ω終端抵抗 ６、７、２１、２２ 検波器 ８ 引算器（差動増幅器） ９、１５ ループゲイン増幅器 １０、１６ ループフィルタ １１ 電圧制御形の可変減衰器 １２、１３ カップラー １７ 電圧制御形の可変移相器 1 constant amplitude wave generation circuit 2 synthesis circuit 3, 4 amplifier 5 50 Ω termination resistance 6, 7, 21, 22 detector 8 subtractor (differential amplifier) 9, 15 loop gain amplifier 10, 16 loop filter 11 voltage control type Variable attenuator 12, 13 Coupler 17 Voltage controlled variable phase shifter
───────────────────────────────────────────────────── フロントページの続き (72)発明者 馬庭 透 神奈川県川崎市中原区上小田中1015番地 富士通株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toru Maniwa 1015 Kamiodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa Fujitsu Limited
Claims (4)
トル合成して二つの定振幅波を発生する定振幅波発生回
路（３１）と、 該二つの定振幅波をそれぞれ増幅する二つの増幅器（３
２、３３）と、 該二つの増幅器の出力をベクトル合成することで信号波
成分を分離する合成回路（３４）と、 該合成回路に入力される二つの定振幅波の振幅差を検出
する振幅差検出器（３５）と、 該振幅差検出器で検出された振幅差を無くすように該二
つの定振幅波の少なくとも一方の振幅を減衰させる可変
減衰器（３６）とを備えた定振幅波合成形増幅器。1. A constant amplitude wave generation circuit (31) for generating two constant amplitude waves by vector-synthesizing a signal wave and an auxiliary wave orthogonal thereto, and two constant amplitude wave amplifying circuits for amplifying the two constant amplitude waves, respectively. Amplifier (3
2, 33), a combination circuit (34) for separating signal wave components by vector combining the outputs of the two amplifiers, and an amplitude for detecting an amplitude difference between two constant amplitude waves input to the combination circuit. A constant amplitude wave including a difference detector (35) and a variable attenuator (36) that attenuates the amplitude of at least one of the two constant amplitude waves so as to eliminate the amplitude difference detected by the amplitude difference detector. Compound amplifier.
トル合成して二つの定振幅波を発生する定振幅波発生回
路（３１）と、 該二つの定振幅波をそれぞれ増幅する二つの増幅器（３
２、３３）と、 該二つの増幅器の出力をベクトル合成することで信号波
成分を分離する合成回路（３４）と、 該合成回路に入力される二つの定振幅波の位相差を検出
する位相検出器（３７）と、 該位相検出器で検出された位相差に基づき該二つの増幅
器で発生する位相偏差を無くすように該二つの定振幅波
の少なくとも一方の位相を変える可変移相器（３８）と
を備えた定振幅波合成形増幅器。2. A constant amplitude wave generating circuit (31) for generating two constant amplitude waves by vector-synthesizing a signal wave and an auxiliary wave orthogonal thereto, and two constant amplitude wave amplifying circuits for amplifying the two constant amplitude waves, respectively. Amplifier (3
2, 33), a combining circuit (34) for separating the signal wave components by vector combining the outputs of the two amplifiers, and a phase for detecting the phase difference between the two constant amplitude waves input to the combining circuit. A detector (37) and a variable phase shifter () for changing the phase of at least one of the two constant amplitude waves so as to eliminate the phase deviation generated in the two amplifiers based on the phase difference detected by the phase detector ( 38) and a constant amplitude wave synthesizer type amplifier.
トル合成して二つの定振幅波を発生する定振幅波発生回
路（３１）と、 該二つの定振幅波をそれぞれ増幅する二つの増幅器（３
２、３３）と、 該二つの増幅器の出力をベクトル合成することで信号波
成分と補助波成分を分離する合成回路（３４）と、 該合成回路から出力される補助波成分を該増幅器の増幅
率分の１に減衰させる減衰器（４１）と、 該減衰器から出力される補助波成分と該定振幅波発生回
路で用いた補助波との振幅差を検出する振幅差検出器
（４０）と、 該振幅差検出器で検出された振幅差を無くすように該二
つの定振幅波の少なくとも一方の振幅を減衰させる可変
減衰器（３６）とを備えた定振幅波合成形増幅器。3. A constant amplitude wave generating circuit (31) for generating two constant amplitude waves by vector-synthesizing an input wave and an auxiliary wave orthogonal thereto, and two constant amplitude wave amplifying circuits for amplifying the two constant amplitude waves, respectively. Amplifier (3
2, 33), a combining circuit (34) for separating the signal wave component and the auxiliary wave component by vector combining the outputs of the two amplifiers, and the auxiliary wave component output from the combining circuit for amplification of the amplifier. An attenuator (41) for attenuating to a factor of 1, and an amplitude difference detector (40) for detecting an amplitude difference between the auxiliary wave component output from the attenuator and the auxiliary wave used in the constant amplitude wave generating circuit. And a variable attenuator (36) that attenuates the amplitude of at least one of the two constant amplitude waves so as to eliminate the amplitude difference detected by the amplitude difference detector.
トル合成して二つの定振幅波を発生する定振幅波発生回
路（３１）と、 該二つの定振幅波をそれぞれ増幅する二つの増幅器（３
２、３３）と、 該二つの増幅器の出力をベクトル合成することで信号波
成分と補助波成分を分離する合成回路（３４）と、 該合成回路から出力される補助波成分と該定振幅波発生
回路で用いた補助波との位相差を検出する位相検出器
（３９）と、 該位相検出器で検出された位相差に基づき該二つの増幅
器で発生する位相偏差を無くすように該二つの定振幅波
の少なくとも一方の位相を変える可変移相器（３８）と
を備えた定振幅波合成形増幅器。4. A constant amplitude wave generation circuit (31) for generating two constant amplitude waves by vector-synthesizing a signal wave and an auxiliary wave orthogonal thereto, and two constant amplitude wave amplifying circuits for amplifying the two constant amplitude waves, respectively. Amplifier (3
2, 33), a synthesis circuit (34) for separating the signal wave component and the auxiliary wave component by vector-synthesizing the outputs of the two amplifiers, the auxiliary wave component output from the synthesis circuit, and the constant amplitude wave. A phase detector (39) for detecting the phase difference with the auxiliary wave used in the generating circuit, and the two phase detectors (39) for eliminating the phase deviation generated by the two amplifiers based on the phase difference detected by the phase detector. And a variable phase shifter (38) for changing the phase of at least one of the constant amplitude waves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3212741A JPH0537263A (en) | 1991-07-30 | 1991-07-30 | Fixed amplitude wave synthesis type amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3212741A JPH0537263A (en) | 1991-07-30 | 1991-07-30 | Fixed amplitude wave synthesis type amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0537263A true JPH0537263A (en) | 1993-02-12 |
Family
ID=16627663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3212741A Withdrawn JPH0537263A (en) | 1991-07-30 | 1991-07-30 | Fixed amplitude wave synthesis type amplifier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0537263A (en) |
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-
1991
- 1991-07-30 JP JP3212741A patent/JPH0537263A/en not_active Withdrawn
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