JPH06132736A - Linear transmitter - Google Patents
Linear transmitterInfo
- Publication number
- JPH06132736A JPH06132736A JP4305964A JP30596492A JPH06132736A JP H06132736 A JPH06132736 A JP H06132736A JP 4305964 A JP4305964 A JP 4305964A JP 30596492 A JP30596492 A JP 30596492A JP H06132736 A JPH06132736 A JP H06132736A
- Authority
- JP
- Japan
- Prior art keywords
- linear
- power amplifier
- input signal
- amplifier
- 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.)
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- Control Of Amplification And Gain Control (AREA)
- Amplifiers (AREA)
Abstract
(57)【要約】
【目的】 非線形電力増幅器を使用した線形送信装置に
おいて、入力信号の平均電圧を検出し制御信号として利
用することによりその線形動作範囲を簡単に、効率よく
拡大させた線形送信装置を提供すること。
【構成】 非線形電力増幅器１−２の前段に制御電圧で
その増幅率が変化する利得可変増幅器１−１を接続し、
従来の入力信号包絡線による非線形電力増幅器１−２の
制御に加えて、非線形電力増幅器１−２の入力信号の平
均電圧を検出する平均電圧検出器１−４を設け、その出
力によって利得可変増幅器１−１と非線形電力増幅器１
−２を制御する手段を設け、その線形動作範囲を拡大さ
せた。
(57) [Abstract] [Objective] In a linear transmission device using a non-linear power amplifier, the linear operation range is simply and efficiently expanded by detecting the average voltage of an input signal and using it as a control signal. Providing equipment. [Structure] A variable gain amplifier 1-1 whose amplification factor is changed by a control voltage is connected in front of the nonlinear power amplifier 1-2,
In addition to the conventional control of the non-linear power amplifier 1-2 by the input signal envelope, an average voltage detector 1-4 for detecting the average voltage of the input signal of the non-linear power amplifier 1-2 is provided, and a variable gain amplifier is provided by its output. 1-1 and nonlinear power amplifier 1
-2 was provided to expand the linear operation range.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、線形送信装置に関する
もので、入力信号の平均電圧を検出し利用することによ
りその線形動作範囲を簡単に、効率よく拡大させた線形
送信装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear transmitter, and more particularly to a linear transmitter whose linear operation range is easily and efficiently expanded by detecting and utilizing an average voltage of an input signal. .
【０００２】[0002]
【従来技術】従来この種の線形送信装置に関しては、特
開平３−１７４８１０号公報に開示されたものがある。
この種の線形送信装置は基本的に電源効率が良いことが
望ましく、また線形変調方式が用いられる通信システム
においては線形電力増幅する必要がある。このような線
形送信装置の電力増幅器において線形性と電源効率とを
両立させる一つの方法として、電源効率の良い非線形増
幅器を線形補償して用いる手段が知られている。これは
制御信号により増幅率が変化する非線形電力増幅器に入
力及び入出力信号の包絡線を検出する包絡線検出器を用
意して、入出及び出力信号の包絡線信号の差信号により
制御信号を得て、非線形電力増幅器の増幅率を変化させ
ることによって線形補償を行うものである。以下に従来
の技術の原理を述べる。2. Description of the Related Art Conventionally, a linear transmitter of this type is disclosed in Japanese Patent Application Laid-Open No. 3-174810.
It is desirable that this kind of linear transmitter is basically good in power supply efficiency, and it is necessary to perform linear power amplification in a communication system using a linear modulation method. As one method for achieving both the linearity and the power supply efficiency in the power amplifier of such a linear transmission device, there is known a means for linearly compensating a non-linear amplifier having a high power supply efficiency. This is to prepare an envelope detector that detects the envelope of input and input / output signals in a non-linear power amplifier whose amplification factor changes according to the control signal, and obtain the control signal from the difference signal of the envelope signals of input / output and output signals. Then, linear compensation is performed by changing the amplification factor of the non-linear power amplifier. The principle of the conventional technique will be described below.
【０００３】図４に線形増幅器並びに非線形増幅器を用
いた場合の、それぞれの入出力信号の様子を示す。線形
増幅器４−２を用いた場合は構成は簡単であるが電源効
率が悪く特にバッテリ電源を使用する移動用送信装置等
には不向きである。非線形増幅器４−４を用いると出力
信号包絡線４−５に示すように歪が生じ、そのままでは
線形変調系には用いることが出来ない。FIG. 4 shows respective input / output signals when a linear amplifier and a non-linear amplifier are used. When the linear amplifier 4-2 is used, the configuration is simple, but the power supply efficiency is poor, and it is not suitable for a mobile transmitter that uses a battery power supply. When the non-linear amplifier 4-4 is used, distortion occurs as shown in the output signal envelope 4-5 and cannot be used as it is in a linear modulation system.
【０００４】そこで制御信号によりその増幅率が変化す
る増幅器を用意し、図５に示すように入力信号の包絡線
により制御信号を変化させ増幅率を変化させることによ
り非線形性を補償する方法が採られている。図６は従来
の線形送信装置の構成例を示すブロック図である。図示
するように、従来の線形送信装置は前置増幅器６−１、
制御信号によりその増幅率が変化する非線形電力増幅器
６−２、入力信号の包絡線を検出する包絡線検出器６−
３、出力信号の包絡線を検出する包絡線検出器６−４、
両者の差信号を発生する差信号発生器６−５、制御信号
を発生する制御電圧発生器６−６で構成される。Therefore, a method of compensating for the non-linearity by preparing an amplifier whose amplification factor changes according to the control signal and changing the amplification factor by changing the control signal according to the envelope of the input signal as shown in FIG. Has been. FIG. 6 is a block diagram showing a configuration example of a conventional linear transmission device. As shown in the figure, the conventional linear transmitter has a preamplifier 6-1,
Non-linear power amplifier 6-2 whose amplification factor changes according to a control signal, envelope detector 6-for detecting the envelope of an input signal
3, envelope detector 6-4 for detecting the envelope of the output signal,
It is composed of a difference signal generator 6-5 for generating a difference signal between the two and a control voltage generator 6-6 for generating a control signal.
【０００５】包絡線検出器６−３で入力信号の包絡線が
検出され、包絡線検出器６−４で出力信号の包絡線が検
出され、差信号発生器６−５で入力信号と出力信号の包
絡線が比較され、両者が一致するように制御電圧発生器
６−６の出力信号で非線形電力増幅器６−２の増幅率が
制御され電源効率のよい線形電力増幅装置が実現され
る。The envelope detector 6-3 detects the envelope of the input signal, the envelope detector 6-4 detects the envelope of the output signal, and the difference signal generator 6-5 receives the input signal and the output signal. Are compared, and the amplification factor of the non-linear power amplifier 6-2 is controlled by the output signal of the control voltage generator 6-6 so that they coincide with each other, thereby realizing a linear power amplification device with good power supply efficiency.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、非線形
電力増幅器の制御信号と増幅率の関係は一般的には図５
に示す特性曲線の様に非線形性を持っている。図５にお
いて、入力信号５−１のように平均電圧値（入力信号を
整流し平滑した値）が適切な場合は線形補償が可能であ
るが、例えば入力信号が小さくなり、入力信号５−２の
ような状態となると特性カ−ブの非線形性の為に出力信
号５−５に示すような出力となる。従って、このような
非線形電力増幅器を用いた線形送信装置は、制御信号と
増幅率との関係を広範に亘って完全な線形に保つことは
非常に困難であり、線形補償は正しく行われないと云う
問題がある。However, the relationship between the control signal and the amplification factor of the nonlinear power amplifier is generally shown in FIG.
It has non-linearity like the characteristic curve shown in. In FIG. 5, when the average voltage value (the value obtained by rectifying and smoothing the input signal) is appropriate like the input signal 5-1, linear compensation is possible, but for example, the input signal becomes small and the input signal 5-2 In such a state, the output as shown by the output signal 5-5 is produced due to the non-linearity of the characteristic curve. Therefore, it is very difficult for a linear transmission device using such a non-linear power amplifier to keep the relationship between the control signal and the amplification factor completely linear over a wide range, and linear compensation cannot be performed correctly. There is a problem to say.
【０００７】一般的な非線形電力増幅器の増幅率可変範
囲は限られており、広範囲に亘る入力レベル全てについ
て線形補償を施すことは従来の技術では非常に困難であ
る。又、制御信号と増幅率との関係に線形性が保たれる
範囲が狭く、入力信号のレベルによって出力信号に歪が
生じると云う問題がある。The amplification factor variable range of a general non-linear power amplifier is limited, and it is very difficult to perform linear compensation for all input levels over a wide range with conventional techniques. Further, there is a problem that the range in which the linearity is maintained in the relationship between the control signal and the amplification factor is narrow and the output signal is distorted depending on the level of the input signal.
【０００８】本発明は上述の点に鑑みてなされたもの
で、上記問題点を除去し、入力信号の平均電圧を検出し
制御信号として利用することによりその線形動作範囲を
簡単に、効率よく拡大させた線形送信装置を提供するこ
とを目的とする。The present invention has been made in view of the above points, and eliminates the above problems and detects the average voltage of an input signal and uses it as a control signal to expand the linear operation range easily and efficiently. It is an object of the present invention to provide such a linear transmitter.
【０００９】[0009]
【課題を解決するための手段】上記課題を解決するため
第１の発明は、図１に示すように非線形電力増幅器１−
２の前段に利得可変増幅器１−１を接続し、従来の入力
信号包絡線による非線形電力増幅器１−２の制御に加え
て、非線形電力増幅器１−２の入力信号の平均電圧を検
出する平均電圧検出器１−４を設け、その出力によって
利得可変増幅器１−１と非線形電力増幅器１−２を制御
する手段を設け、その線形動作範囲を著しく拡大させた
ことを特徴とする。In order to solve the above problems, the first invention is a nonlinear power amplifier 1-as shown in FIG.
2 is connected to the variable gain amplifier 1-1 in the preceding stage, and in addition to the conventional control of the nonlinear power amplifier 1-2 by the input signal envelope, an average voltage for detecting the average voltage of the input signal of the nonlinear power amplifier 1-2. It is characterized in that a detector 1-4 is provided, means for controlling the variable gain amplifier 1-1 and the non-linear power amplifier 1-2 by the output thereof is provided, and the linear operation range thereof is significantly expanded.
【００１０】第２の発明は広範囲な線形補償効果を得る
ために、図３に示すように平均電圧検出器３−３で平均
入力電圧を検出し、平均入力電圧に応じて適正な入力信
号を切替て入力する切替手段（切替器３−４）を設け、
適正な入力信号を切替て非線形電力増幅器３−２に入力
することにより、線形動作範囲を著しく拡大させたこと
を特徴とする。In order to obtain a wide range of linear compensation effect, the second invention detects the average input voltage by the average voltage detector 3-3 as shown in FIG. 3, and outputs an appropriate input signal according to the average input voltage. A switching means (switcher 3-4) for switching and inputting is provided,
The linear operation range is remarkably expanded by switching an appropriate input signal and inputting it to the non-linear power amplifier 3-2.
【００１１】[0011]
【作用】本発明では、制御信号によりその増幅率が変化
する非線形電力増幅器の前段に制御信号によりその増幅
率が変化する利得可変増幅器を設け、前記非線形電力増
幅器の入力信号レベルの平均入力電圧により利得可変増
幅器と非線形電力増幅器を合わせて制御し、全体の増幅
率を一定に制御し、非線形電力増幅器の動作点を線形動
作範囲に制御することによって広範囲な入力信号レベル
に対して線形特性を得ることができる。In the present invention, a variable gain amplifier whose amplification factor changes according to the control signal is provided in front of the nonlinear power amplifier whose amplification factor changes according to the control signal. Linear characteristics are obtained for a wide range of input signal levels by controlling the variable gain amplifier and the non-linear power amplifier together, controlling the overall amplification factor to be constant, and controlling the operating point of the non-linear power amplifier in the linear operation range. be able to.
【００１２】[0012]
【実施例】［実施例１］以下本発明の実施例を図面に基
づいて詳細に説明する。図１は本発明の実施例１の構成
例を示すブロック図である。図示するように、線形送信
装置は制御信号で増幅率が変化する利得可変増幅器１−
１、制御信号によりその増幅率が変化する非線形電力増
幅器１−２、入力信号の包絡線を検出する包絡線検出器
１−３、入力信号の平均電圧を検出する平均電圧検出器
１−４、制御信号を発生する制御電圧発生器１−５で構
成される。[Embodiment 1] An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a block diagram showing a configuration example of a first embodiment of the present invention. As shown in the figure, the linear transmission device has a variable gain amplifier 1-
1. A non-linear power amplifier 1-2 whose amplification factor changes according to a control signal, an envelope detector 1-3 for detecting an envelope of an input signal, an average voltage detector 1-4 for detecting an average voltage of the input signal, It is composed of a control voltage generator 1-5 which generates a control signal.
【００１３】非線形電力増幅器１−２は図５に示す制御
信号−増幅率特性を持ち、利得可変増幅器１−１と合わ
せて一定の増幅率をもつ線形増幅器となるように制御さ
れる。入力信号レベルが小さくなって線形補償を満足に
実施出来ない信号レベルとなると（図５の入力信号５−
２の状態）、平均電圧検出器１−４の出力信号は利得可
変増幅器１−１の増幅率を下げ、同時に制御電圧発生器
１−５には非線形電力増幅器１−２の増幅率を増大させ
る方向に作用する。The nonlinear power amplifier 1-2 has the control signal-amplification factor characteristic shown in FIG. 5, and is controlled so as to be a linear amplifier having a constant amplification factor together with the variable gain amplifier 1-1. When the input signal level becomes so low that the linear compensation cannot be performed satisfactorily (the input signal 5-
2 state), the output signal of the average voltage detector 1-4 lowers the gain of the variable gain amplifier 1-1, and at the same time increases the gain of the nonlinear power amplifier 1-2 in the control voltage generator 1-5. Acts in the direction.
【００１４】ここで利得可変増幅器１−１の減衰率と非
線形電力増幅器１−２の増幅率は等しく、全体の増幅率
はそのままで、非線形電力増幅器１−２の制御信号レベ
ルは図５の５−２の状態から５−３の状態へと移動す
る。更に包絡線検出器１−３による制御信号により正し
い線形補償がなされる。Here, the attenuation factor of the variable gain amplifier 1-1 and the amplification factor of the non-linear power amplifier 1-2 are equal, the overall amplification factor remains unchanged, and the control signal level of the non-linear power amplifier 1-2 is 5 in FIG. Move from state -2 to state 5-3. Further, correct linear compensation is performed by the control signal from the envelope detector 1-3.
【００１５】［実施例２］図２は本発明の実施例２の構
成例を示すブロック図である。図示するように本発明の
線形送信装置は制御信号でその増幅率が変化する利得可
変増幅器２−１、制御信号でその増幅率が変化する非線
形電力増幅器２−２、入力信号の包絡線を検出する包絡
線検出器２−３、入力信号の平均電圧を検出する平均電
圧検出器２−４、制御信号でその増幅率が変化する利得
可変増幅器２−５、出力信号の包絡線を検出する包絡線
検出器２−６、利得可変増幅器２−５と包絡線検出器２
−６との差信号を発生する差信号発生器２−７、該差信
号発生器２−７の出力から制御信号を発生する制御電圧
発生器２−８で構成される。[Second Embodiment] FIG. 2 is a block diagram showing a configuration example of a second embodiment of the present invention. As shown in the figure, the linear transmitter of the present invention detects a variable gain amplifier 2-1 whose amplification factor changes with a control signal, a non-linear power amplifier 2-2 whose amplification factor changes with a control signal, and an envelope of an input signal. Envelope detector 2-3, average voltage detector 2-4 for detecting average voltage of input signal, variable gain amplifier 2-5 whose amplification factor changes with control signal, envelope for detecting envelope of output signal Line detector 2-6, variable gain amplifier 2-5 and envelope detector 2
A difference signal generator 2-7 that generates a difference signal with respect to −6, and a control voltage generator 2-8 that generates a control signal from the output of the difference signal generator 2-7.
【００１６】上記実施例２では入力信号と出力信号の包
絡線の差信号を差信号発生器２−７で求め、波形が等し
くなるように制御して非線形電力増幅器２−２の線形補
償を行う場合の例である。非線形電力増幅器２−２の入
力信号の包絡線を検出する包絡線検出器２−３の出力は
差信号発生器２−７に入力される前に利得可変増幅器２
−５に入力される。入力信号レベルが小さくなって線形
補償を満足に実施できない信号レベルとなると（図５の
入力信号５−２のような状態）、平均電圧検出器２−４
の出力信号は利得可変増幅器２−１の増幅率を下げ、利
得可変増幅器２−５の増幅率を上げることにより、差信
号発生器２−７の出力を上げ、制御電圧発生器２−８の
出力を上げ、制御信号レベルを適切な位置に移動させ、
非線形電力増幅器２−２の増幅率を上げて実施例１と同
様に全体の総合利得を変えずに線形増幅動作をする。In the second embodiment, the difference signal between the envelopes of the input signal and the output signal is obtained by the difference signal generator 2-7, and the nonlinear power amplifier 2-2 is linearly compensated by controlling the waveforms to be equal. This is an example of the case. The output of the envelope detector 2-3, which detects the envelope of the input signal of the nonlinear power amplifier 2-2, is input to the variable gain amplifier 2 before being input to the difference signal generator 2-7.
Input to -5. When the input signal level becomes so low that the linear compensation cannot be performed satisfactorily (state like the input signal 5-2 in FIG. 5), the average voltage detector 2-4
Output signal of the variable gain amplifier 2-1 is lowered and the gain of the variable gain amplifier 2-5 is increased to increase the output of the difference signal generator 2-7 and the control voltage generator 2-8. Increase the output, move the control signal level to the appropriate position,
The amplification factor of the non-linear power amplifier 2-2 is increased to perform the linear amplification operation without changing the overall total gain as in the first embodiment.
【００１７】［実施例３］図３は本発明の実施例３の構
成例を示すブロック図である。図示するように本発明の
線形送信装置は前置増幅器３−１、制御信号によりその
増幅率が変化する非線形電力増幅器３−２、入力信号の
平均電圧を検出する平均電圧検出器３−３、入力信号を
切替る切替器３−４、入力信号の包絡線を検出する包絡
線検出器３−５、出力信号の包絡線を検出する包絡線検
出器３−６、包絡線検出器３−５の出力信号と包絡線検
出器３−６の出力信号との差信号を発生する差信号発生
器３−７、制御信号を発生する制御電圧発生器３−８で
構成される。[Third Embodiment] FIG. 3 is a block diagram showing a configuration example of a third embodiment of the present invention. As shown in the figure, the linear transmitter of the present invention includes a preamplifier 3-1, a non-linear power amplifier 3-2 whose amplification factor changes according to a control signal, an average voltage detector 3-3 for detecting an average voltage of an input signal, A switch 3-4 that switches the input signal, an envelope detector 3-5 that detects the envelope of the input signal, an envelope detector 3-6 that detects the envelope of the output signal, and an envelope detector 3-5. 2 and an output signal of the envelope detector 3-6, a difference signal generator 3-7 for generating a difference signal and a control voltage generator 3-8 for generating a control signal.
【００１８】従来の方式に平均電圧検出器３−３を設
け、入力信号の平均入力電圧に応じて回路構成を切替る
線形送信装置の構成方法を示すものである。図３におい
て、切替器３−４の接続１は装置の入力信号が適正な場
合の接続側である。入力信号が小さくなり線形補償が不
可能な状態になると平均電圧検出器３−３がそれを検出
して切替器３−４を接続２の側に切替る。This is a method of constructing a linear transmission device in which an average voltage detector 3-3 is provided in the conventional system and the circuit configuration is switched according to the average input voltage of an input signal. In FIG. 3, connection 1 of the switch 3-4 is the connection side when the input signal of the device is proper. When the input signal becomes small and linear compensation becomes impossible, the average voltage detector 3-3 detects it and switches the switch 3-4 to the connection 2 side.
【００１９】以下に本発明の動作を図５の特性図に従っ
て説明する。入力信号が適正で線形補正が正しく行われ
る図５の入力信号５−１の状態では装置は接続１の状態
となっている。入力信号の平均入力電圧レベルが小さく
なって出力に歪が生じる入力信号５−２の状態になる
と、平均電圧検出器３−３が平均入力電圧レベルを検出
して切替器３−４を接続２の状態に切替る。The operation of the present invention will be described below with reference to the characteristic diagram of FIG. In the state of the input signal 5-1 in FIG. 5 in which the input signal is proper and the linear correction is properly performed, the device is in the connection 1 state. When the average input voltage level of the input signal becomes small and the output signal becomes distorted, the average voltage detector 3-3 detects the average input voltage level and connects the switch 3-4. Switch to the state of.
【００２０】接続２の状態では非線形電力増幅器３−２
の入力信号レベルが低下するため非線形電力増幅器３−
２の出力信号レベルも下がる。従って入力信号の包絡線
と出力信号の包絡線の差信号は接続１の状態に比べ増加
する。従って差信号発生器３−７の出力は増加し、制御
電圧発生器３−８の出力信号も増加し、前置増幅器３−
１が切り離されて減少した増幅率だけ非線形電力増幅器
３−２の増幅率が増大するから、線形送信装置全体の増
幅率は変化しない。即ち図５における入力信号５−３の
状態で非線形電力増幅器３−２が稼働し歪のない線形増
幅動作をする。In the state of connection 2, the nonlinear power amplifier 3-2
Since the input signal level of the
The output signal level of 2 also decreases. Therefore, the difference signal between the envelope of the input signal and the envelope of the output signal increases compared to the state of connection 1. Therefore, the output of the difference signal generator 3-7 increases, the output signal of the control voltage generator 3-8 also increases, and the preamplifier 3-
Since the amplification factor of the non-linear power amplifier 3-2 is increased by the reduction factor of 1 when it is cut off, the amplification factor of the entire linear transmission device does not change. That is, the non-linear power amplifier 3-2 operates in the state of the input signal 5-3 in FIG. 5 to perform a linear amplification operation without distortion.
【００２１】[0021]
【発明の効果】以上、詳細に説明したように、例えばπ
／４シフトＤＱＰＳＫを用いた移動体通信などの携帯無
線機においては、変調方式によって送信系の線形動作が
要求される一方、電源の制約から電源効率の良い非線形
電力増幅器を用いざるを得ず、更に電波使用効率を高め
るために、状況に応じて送信電力レベルを切替て使用す
ることが要求されている。本発明によれば非常に簡単な
構成で従来非常に困難であった広範囲な入力電力レベル
に対して線形補償を実現できる。即ち、一般に非線形電
力増幅器の前段には複数段の電圧増幅器が接続されてお
り、新たに追加される要素は極簡単に構成することがで
き、平均入力電圧を考慮することにより、僅かな構成要
素を追加するだけで従来困難であった高性能な線形送信
装置を簡単に構成することが出来るという優れた効果が
得られる。As described above in detail, for example, π
In mobile wireless devices such as mobile communication using / 4 shift DQPSK, linear operation of the transmission system is required due to the modulation method, but a non-linear power amplifier with good power supply efficiency cannot be avoided because of power supply restrictions. Furthermore, in order to improve the efficiency of radio wave use, it is required to switch and use the transmission power level according to the situation. According to the present invention, linear compensation can be realized for a wide range of input power levels, which has been very difficult in the past with a very simple structure. That is, in general, a plurality of stages of voltage amplifiers are connected to the front stage of the nonlinear power amplifier, and the newly added element can be configured very easily. It is possible to obtain an excellent effect that a high-performance linear transmission device, which has been difficult in the past, can be easily configured by simply adding the.
【図１】本発明の実施例１の構成例を示すブロック図で
ある。FIG. 1 is a block diagram showing a configuration example of a first embodiment of the present invention.
【図２】本発明の実施例２の構成例を示すブロック図で
ある。FIG. 2 is a block diagram showing a configuration example of a second embodiment of the present invention.
【図３】本発明の実施例３の構成例を示すブロック図で
あるFIG. 3 is a block diagram showing a configuration example of a third embodiment of the present invention.
【図４】線形増幅器と非線形増幅器の入出力信号を示す
図である。FIG. 4 is a diagram showing input / output signals of a linear amplifier and a non-linear amplifier.
【図５】非線形増幅器の制御信号−増幅率特性と入出力
信号を示す図である。FIG. 5 is a diagram showing a control signal-amplification factor characteristic and an input / output signal of a nonlinear amplifier.
【図６】従来の線形送信装置の構成例を示すブロック図
である。FIG. 6 is a block diagram showing a configuration example of a conventional linear transmission device.
１−１ 利得可変増幅器 １−２ 非線形電力増幅器 １−３ 包絡線検出器 １−４ 平均電圧検出器 １−５ 制御電圧発生器 ２−１ 利得可変増幅器 ２−２ 非線形電力増幅器 ２−３ 包絡線検出器 ２−４ 平均電圧検出器 ２−５ 利得可変増幅器 ２−６ 包絡線検出器 ２−７ 差信号発生器 ２−８ 制御電圧発生器 ３−１ 前置増幅器 ３−２ 非線形電力増幅器 ３−３ 平均電圧検出器 ３−４ 切替器 ３−５ 包絡線検出器 ３−６ 包絡線検出器 ３−７ 差信号発生器 ３−８ 制御電圧発生器 1-1 Variable Gain Amplifier 1-2 Nonlinear Power Amplifier 1-3 Envelope Detector 1-4 Average Voltage Detector 1-5 Control Voltage Generator 2-1 Variable Gain Amplifier 2-2 Nonlinear Power Amplifier 2-3 Envelope Detector 2-4 Average voltage detector 2-5 Variable gain amplifier 2-6 Envelope detector 2-7 Difference signal generator 2-8 Control voltage generator 3-1 Preamplifier 3-2 Non-linear power amplifier 3- 3 Average voltage detector 3-4 Switching device 3-5 Envelope detector 3-6 Envelope detector 3-7 Difference signal generator 3-8 Control voltage generator
Claims (2)
力増幅器を使用し、入力信号の包絡線信号、又は入出力
信号の包絡線信号の差信号を基に制御信号を作り前記非
線形電力増幅器を制御し線形増幅器として使用する線形
送信装置において、 前記非線形電力増幅器の前段に制御信号で増幅率を制御
可能な利得可変増幅器を接続し、前記非線形電力増幅器
の入力信号レベルの平均値を検出する平均値検出手段を
設け、その出力によって前記利得可変増幅器と前記非線
形電力増幅器を制御する手段を設け、 前記利得可変増幅器と前記非線形電力増幅器の特性が互
いに補償するように制御し、線形動作範囲を拡大させた
ことを特徴とする線形送信装置。1. A non-linear power amplifier that uses a non-linear power amplifier whose amplification factor can be controlled by a control signal, and creates a control signal based on an envelope signal of an input signal or a difference signal between envelope signals of input and output signals. In a linear transmission device for controlling a linear gain amplifier, a variable gain amplifier whose amplification factor can be controlled by a control signal is connected to the preceding stage of the nonlinear power amplifier, and an average value of input signal levels of the nonlinear power amplifier is detected. Mean value detection means is provided, means for controlling the variable gain amplifier and the non-linear power amplifier by its output is provided, control is performed so that the characteristics of the variable gain amplifier and the non-linear power amplifier are mutually compensated, and a linear operation range is set. A linear transmission device characterized by being enlarged.
力増幅器を使用し、入力信号の包絡線信号、又は入出力
信号の包絡線信号の差信号を基に制御信号を作り前記非
線形電力増幅器を制御し線形増幅器として使用する線形
送信装置において、 前記非線形電力増幅器の前段に前置増幅器を設け、前記
非線形電力増幅器の入力信号として前置増幅器の出力信
号、又は前置増幅器の入力信号を切替て入力する切替手
段を設け、更に入力信号レベルの平均値を検出し前記切
替手段を制御する手段を設け、 入力信号レベルの平均値を検出し、適切な方の入力信号
を前記切替手段で切替て前記非線形増幅器に入力するこ
とにより線形動作範囲を拡大させたことを特徴とする線
形送信装置2. A non-linear power amplifier that uses a non-linear power amplifier whose amplification factor can be controlled by a control signal, and creates a control signal based on an envelope signal of an input signal or a difference signal between envelope signals of input / output signals. In a linear transmission device for controlling a linear amplifier, the preamplifier is provided before the non-linear power amplifier, and the output signal of the pre-amplifier or the input signal of the pre-amplifier is switched as an input signal of the non-linear power amplifier. Switching means for inputting the input signal level, and further for detecting the average value of the input signal level to control the switching means, detecting the average value of the input signal level, and switching the appropriate input signal by the switching means. The linear transmission device is characterized in that the linear operation range is expanded by inputting it to the nonlinear amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04305964A JP3136382B2 (en) | 1992-10-19 | 1992-10-19 | Linear transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04305964A JP3136382B2 (en) | 1992-10-19 | 1992-10-19 | Linear transmitter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06132736A true JPH06132736A (en) | 1994-05-13 |
| JP3136382B2 JP3136382B2 (en) | 2001-02-19 |
Family
ID=17951423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04305964A Expired - Fee Related JP3136382B2 (en) | 1992-10-19 | 1992-10-19 | Linear transmitter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3136382B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005295523A (en) * | 2004-03-09 | 2005-10-20 | Matsushita Electric Ind Co Ltd | Transmitting apparatus and wireless communication apparatus |
| JP2006086916A (en) * | 2004-09-17 | 2006-03-30 | Sony Ericsson Mobilecommunications Japan Inc | High frequency power amplifier and transmitter |
| JP2009505458A (en) * | 2006-06-14 | 2009-02-05 | リサーチ イン モーション リミテッド | Input drive control for switcher-adjusted power amplifier modules |
| US8000409B2 (en) | 2004-02-20 | 2011-08-16 | Research In Motion Limited | Method and apparatus for improving power amplifier efficiency in wireless communication systems having high peak to average power ratios |
| US8428181B2 (en) | 2002-12-02 | 2013-04-23 | Research In Motion Limited | Method and apparatus for optimizing transmitter power efficiency |
| JP2015510310A (en) * | 2012-01-12 | 2015-04-02 | ゼットティーイー コーポレーションＺｔｅ Ｃｏｒｐｏｒａｔｉｏｎ | Power supply device, power supply management method using the same, and wireless communication terminal |
| US9276545B2 (en) | 2010-07-23 | 2016-03-01 | Blackberry Limited | Method of power amplifier switching power control using post power amplifier power detection |
-
1992
- 1992-10-19 JP JP04305964A patent/JP3136382B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8428181B2 (en) | 2002-12-02 | 2013-04-23 | Research In Motion Limited | Method and apparatus for optimizing transmitter power efficiency |
| US8000409B2 (en) | 2004-02-20 | 2011-08-16 | Research In Motion Limited | Method and apparatus for improving power amplifier efficiency in wireless communication systems having high peak to average power ratios |
| JP2005295523A (en) * | 2004-03-09 | 2005-10-20 | Matsushita Electric Ind Co Ltd | Transmitting apparatus and wireless communication apparatus |
| JP2006086916A (en) * | 2004-09-17 | 2006-03-30 | Sony Ericsson Mobilecommunications Japan Inc | High frequency power amplifier and transmitter |
| JP2009505458A (en) * | 2006-06-14 | 2009-02-05 | リサーチ イン モーション リミテッド | Input drive control for switcher-adjusted power amplifier modules |
| US9276545B2 (en) | 2010-07-23 | 2016-03-01 | Blackberry Limited | Method of power amplifier switching power control using post power amplifier power detection |
| JP2015510310A (en) * | 2012-01-12 | 2015-04-02 | ゼットティーイー コーポレーションＺｔｅ Ｃｏｒｐｏｒａｔｉｏｎ | Power supply device, power supply management method using the same, and wireless communication terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3136382B2 (en) | 2001-02-19 |
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