JP2014207570A - Power control circuit and temperature compensation method - Google Patents

Power control circuit and temperature compensation method Download PDF

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JP2014207570A
JP2014207570A JP2013084165A JP2013084165A JP2014207570A JP 2014207570 A JP2014207570 A JP 2014207570A JP 2013084165 A JP2013084165 A JP 2013084165A JP 2013084165 A JP2013084165 A JP 2013084165A JP 2014207570 A JP2014207570 A JP 2014207570A
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output power
amplifier
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JP6304734B2 (en
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泰和 黒田
Yasukazu Kuroda
泰和 黒田
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NEC Network and Sensor Systems Ltd
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Abstract

PROBLEM TO BE SOLVED: To reduce a temperature characteristic change of an output power detection circuit in an ALC circuit or the like without requiring complicated control and without adding to the number of circuit components.SOLUTION: A power control circuit includes: an output power detection circuit 2 for receiving a part of an output power of a power amplifier 1 and outputting a detection voltage; a processing circuit 3 for controlling a power input into the power amplifier 1 such that the output power of the power amplifier 1 becomes a desired value according to the detection voltage; and an attenuator 4 for attenuating the power input into the output power detection circuit 2 by an amount of attenuation determined on the basis of the desired value of the output power of the power amplifier 1 and a temperature characteristic of the output power detection circuit 2.

Description

本発明は、ALC回路等における温度変動を保障する電力制御回路および温度補償方法に関する。   The present invention relates to a power control circuit and a temperature compensation method for ensuring temperature fluctuation in an ALC circuit or the like.

高周波増幅器(以下、アンプともいう。)は、周囲温度変動や、アンプ自体の発熱、つまりアンプ自体の温度変動や、入力電力の変動によって、出力電力が変動しないことが望ましい。その周囲温度変動、アンプ自体の温度変動、入力電力の変動等に対して出力電力を補償し安定化する技術として、ALC(Automatic Level Control)回路がある(例えば、特許文献1、2参照。)。特許文献1、2には、一般的なALC回路が記載されている。ALC回路は、出力電力を検出し、アンプに対して前置されている可変減衰器の減衰量を変化させ、出力電力を一定に保つ回路である。   A high-frequency amplifier (hereinafter also referred to as an amplifier) desirably has output power that does not fluctuate due to ambient temperature fluctuations, heat generation of the amplifier itself, that is, temperature fluctuation of the amplifier itself, and fluctuation of input power. There is an ALC (Automatic Level Control) circuit as a technique for compensating and stabilizing output power against fluctuations in ambient temperature, temperature fluctuation of the amplifier itself, fluctuation in input power, and the like (see, for example, Patent Documents 1 and 2). . Patent Documents 1 and 2 describe general ALC circuits. The ALC circuit is a circuit that detects output power, changes the amount of attenuation of a variable attenuator provided in front of the amplifier, and keeps the output power constant.

特許文献1、2に記載されたALC回路では、周囲温度変動等による特性変化を保障することはできるが、出力電力を検出する回路(以下、出力電力検出回路という。)の温度変化による特性変化を補償することができない可能性がある。つまり、ALC回路では、出力電力検出回路の温度が変化した場合、出力電力を一定に保てなくなる可能性がある。従って、ALC回路において、出力電力をより安定化させるためには、出力電力検出回路の温度を補償する回路が必要となる。   In the ALC circuits described in Patent Documents 1 and 2, a change in characteristics due to ambient temperature fluctuations can be guaranteed, but a change in characteristics due to a change in temperature of a circuit that detects output power (hereinafter referred to as an output power detection circuit). May not be able to compensate. That is, in the ALC circuit, there is a possibility that the output power cannot be kept constant when the temperature of the output power detection circuit changes. Therefore, in order to further stabilize the output power in the ALC circuit, a circuit for compensating the temperature of the output power detection circuit is required.

特開昭60−019310号公報JP 60-019310 A 特開平02−217011号公報Japanese Patent Laid-Open No. 02-217011

出力電力検出回路の温度を補償するためには、例えば、温度センサを用意し、アンプの温度を計測し、そのデータに基づき可変減衰器の制御信号に補正を加えるなど、複雑な制御が必要となる。つまり、温度センサや当該複雑な制御を行うための回路等が必要となる。従って、出力電力検出回路の温度を補償する場合、ALC回路における部品点数が増え、回路構成が複雑になる可能性がある。   Compensating the temperature of the output power detection circuit requires complicated control, for example, preparing a temperature sensor, measuring the temperature of the amplifier, and correcting the control signal of the variable attenuator based on the data. Become. That is, a temperature sensor, a circuit for performing the complicated control, and the like are necessary. Therefore, when the temperature of the output power detection circuit is compensated, the number of parts in the ALC circuit increases and the circuit configuration may be complicated.

そこで、本発明は、複雑な制御を必要とせず、また回路の部品点数を増やすことなく、出力電力検出回路の温度特性変化を低減させることができる電力制御回路および温度補償方法を提供することを目的とする。   Therefore, the present invention provides a power control circuit and a temperature compensation method capable of reducing the temperature characteristic change of the output power detection circuit without requiring complicated control and without increasing the number of parts of the circuit. Objective.

本発明による電力制御回路は、電力増幅器の出力電力の一部を入力し、検波電圧を出力する出力電力検出回路と、検波電圧に応じて、電力増幅器の出力電力が目標値になるように電力増幅器に入力される電力を制御する処理回路と、電力増幅器の出力電力の目標値と、出力電力検出回路の温度特性とにもとづいて決定された減衰量で、出力電力検出回路に入力される電力を減衰する減衰器とを含むことを特徴とする。   The power control circuit according to the present invention includes an output power detection circuit that inputs a part of the output power of the power amplifier and outputs a detection voltage, and a power so that the output power of the power amplifier becomes a target value according to the detection voltage. Power input to the output power detection circuit with the amount of attenuation determined based on the processing circuit that controls the power input to the amplifier, the target value of the output power of the power amplifier, and the temperature characteristics of the output power detection circuit And an attenuator for attenuating.

本発明による温度補償方法は、検波素子による検波電圧にもとづいて出力電力を一定にする電力制御方法において、出力電力の目標値と、検波素子の温度特性とにもとづいて決定された減衰量で、検波素子に入力される電力を減衰することを特徴とする。   The temperature compensation method according to the present invention is a power control method in which the output power is made constant based on the detection voltage by the detection element, and the amount of attenuation determined based on the target value of the output power and the temperature characteristics of the detection element. The power input to the detector element is attenuated.

本発明によれば、複雑な制御を必要とせず、また回路の部品点数を増やすことなく、出力電力検出回路の温度特性変化を低減させることができる。   According to the present invention, it is possible to reduce the temperature characteristic change of the output power detection circuit without requiring complicated control and without increasing the number of parts of the circuit.

本発明による電力制御回路の第1の実施形態の構成を示す説明図である。It is explanatory drawing which shows the structure of 1st Embodiment of the power control circuit by this invention. PINダイオードの温度特性の一例を示す説明図である。It is explanatory drawing which shows an example of the temperature characteristic of a PIN diode. 本発明による電力制御回路の第1の実施形態の他の構成を示す説明図である。It is explanatory drawing which shows the other structure of 1st Embodiment of the power control circuit by this invention. 本発明による電力制御回路の第1の実施形態の他の構成を示す説明図である。It is explanatory drawing which shows the other structure of 1st Embodiment of the power control circuit by this invention. 本発明による電力制御回路の最小構成を示すブロック図である。It is a block diagram which shows the minimum structure of the power control circuit by this invention.

実施形態1.
以下、本発明の第1の実施形態を図面を参照して説明する。
Embodiment 1. FIG.
A first embodiment of the present invention will be described below with reference to the drawings.

図1は、本発明による電力制御回路の第1の実施形態の構成を示す説明図である。   FIG. 1 is an explanatory diagram showing a configuration of a first embodiment of a power control circuit according to the present invention.

図1に示すように、本発明による電力制御回路は、ALC回路を含む。具体的には、電力制御回路は、可変減衰器11と、増幅器(アンプ)12と、方向性結合器13と、検波ダイオード15と、可変減衰器制御回路(以下、ALC処理回路という。)16とを含む。さらに、電力制御回路は、固定減衰器14を含む。   As shown in FIG. 1, the power control circuit according to the present invention includes an ALC circuit. Specifically, the power control circuit includes a variable attenuator 11, an amplifier (amplifier) 12, a directional coupler 13, a detection diode 15, and a variable attenuator control circuit (hereinafter referred to as an ALC processing circuit) 16. Including. Further, the power control circuit includes a fixed attenuator 14.

可変減衰器11は、ALC処理回路16が指定する減衰量に応じて、アンプ12に入力される電力を減衰する。   The variable attenuator 11 attenuates the power input to the amplifier 12 according to the attenuation amount designated by the ALC processing circuit 16.

アンプ12は、アンプ12に対して前置されている可変減衰器11から入力した電力を増幅し、出力する。   The amplifier 12 amplifies and outputs the power input from the variable attenuator 11 provided in front of the amplifier 12.

方向性結合器13は、アンプ12の出力電力、つまりアンプ12によって増幅された電力を分波する。   The directional coupler 13 demultiplexes the output power of the amplifier 12, that is, the power amplified by the amplifier 12.

固定減衰器14は、方向性結合器13が分派した電力を入力し、減衰する。   The fixed attenuator 14 receives the power distributed by the directional coupler 13 and attenuates it.

検波素子としての検波ダイオード15は、例えば、PIN(p−intrinsic−n)ダイオードである。検波ダイオード15は、本実施形態における出力電力検出回路である。検波ダイオード15は、固定減衰器14によって減衰された電力を入力し、検波電圧に変換する。検波ダイオード15は、ALC処理回路16に検波電圧を出力する。   The detection diode 15 as the detection element is, for example, a PIN (p-intrinsic-n) diode. The detection diode 15 is an output power detection circuit in the present embodiment. The detection diode 15 receives the power attenuated by the fixed attenuator 14 and converts it into a detection voltage. The detection diode 15 outputs a detection voltage to the ALC processing circuit 16.

ALC処理回路16は、入力した検波電圧を基準電圧と比較する。ALC処理回路16は、比較結果に応じて、可変減衰器11の減衰量を制御し、アンプ12の出力電力を安定化させる。すなわち、ALC処理回路16は、アンプ12の出力電力が予め定められた目標値となるように、可変減衰器11の減衰量を制御する。   The ALC processing circuit 16 compares the input detection voltage with a reference voltage. The ALC processing circuit 16 controls the attenuation amount of the variable attenuator 11 according to the comparison result, and stabilizes the output power of the amplifier 12. That is, the ALC processing circuit 16 controls the attenuation amount of the variable attenuator 11 so that the output power of the amplifier 12 becomes a predetermined target value.

次に、本実施形態の動作を説明する。   Next, the operation of this embodiment will be described.

図2は、PINダイオードの温度特性の一例を示す説明図である。具体的には、PINダイオードの温度が+50℃、+25℃、−20℃であるときの、PINダイオードの入力電力と検波電圧との対応を示すグラフである。   FIG. 2 is an explanatory diagram showing an example of temperature characteristics of the PIN diode. Specifically, it is a graph showing the correspondence between the input power of the PIN diode and the detection voltage when the temperature of the PIN diode is + 50 ° C., + 25 ° C., and −20 ° C.

図2に示すように、PINダイオードに入力される電力がA[dBm]である場合には、検波電圧は温度変動しないことが分かる。従って、検波ダイオード15がPINダイオードである場合、つまり検波ダイオード15の入力電力と検波電圧とが図2に示す温度特性を有する場合には、検波ダイオード15の入力電力をA[dBm]となるように最適化することにより、検波電圧の温度変動を無くすことができる。   As shown in FIG. 2, when the power input to the PIN diode is A [dBm], it can be seen that the detected voltage does not fluctuate in temperature. Therefore, when the detection diode 15 is a PIN diode, that is, when the input power and detection voltage of the detection diode 15 have the temperature characteristics shown in FIG. 2, the input power of the detection diode 15 is set to A [dBm]. By optimizing to, the temperature fluctuation of the detection voltage can be eliminated.

逆に、検波ダイオード15の入力電力が図2に示すB[dBm]である場合には、検波電圧の温度変動が発生する。仮に、検波ダイオード15の入力電力をB[dBm]にした場合、B[dBm]は変化していないにもかかわらず、検波電圧が温度により変動する。そのため、ALC処理回路16は、可変減衰器11の減衰量を変えようと制御する可能性がある。その結果、アンプ11の出力電力が変化する可能性がある。   On the contrary, when the input power of the detection diode 15 is B [dBm] shown in FIG. 2, the temperature fluctuation of the detection voltage occurs. If the input power of the detection diode 15 is set to B [dBm], the detection voltage varies depending on the temperature even though B [dBm] does not change. Therefore, the ALC processing circuit 16 may control to change the attenuation amount of the variable attenuator 11. As a result, the output power of the amplifier 11 may change.

そこで、本実施形態では、固定減衰器14が、検波ダイオード15の入力電力を、図2に示すA[dBm]となるように、減衰する。つまり、減衰後の電力がA[dBm]となるような減衰量を有する固定減衰器14を、検波ダイオード15に対して前置する。固定減衰器14の減衰量は、アンプ12の出力電力の目標値と、図2に示す検波ダイオード15の温度特性とにもとづいて決定すればよい。   Therefore, in the present embodiment, the fixed attenuator 14 attenuates the input power of the detection diode 15 so as to be A [dBm] shown in FIG. That is, the fixed attenuator 14 having an attenuation amount such that the attenuated power becomes A [dBm] is placed in front of the detection diode 15. The attenuation amount of the fixed attenuator 14 may be determined based on the target value of the output power of the amplifier 12 and the temperature characteristic of the detection diode 15 shown in FIG.

それにより、検波ダイオード15の入力電力を図2に示すA[dBm]にすることができ、検波電圧の温度変動を無くすことが可能となる。よって、ALC処理回路16に入力さる検波電圧が安定化される。従って、ALC処理回路16は、可変減衰器11の減衰量を正確に調整することができ、アンプ12の出力電力が一定になる。   As a result, the input power of the detection diode 15 can be set to A [dBm] shown in FIG. 2, and the temperature fluctuation of the detection voltage can be eliminated. Therefore, the detection voltage input to the ALC processing circuit 16 is stabilized. Therefore, the ALC processing circuit 16 can accurately adjust the attenuation amount of the variable attenuator 11, and the output power of the amplifier 12 becomes constant.

以上に説明したように、本実施形態では、所定の減衰量を有する固定減衰器14を検波ダイオード15に対して前置し、検波ダイオード15に入力される電力を最適化する。それにより、検波ダイオード15における、検波電圧の温度変動を低減することができる。例えば、検波ダイオード15の入力電力を、検波電圧が温度変動しない電力量(例えば、図2に示すA[dBm])に最適化すれば、検波電圧の温度変動を無くすことができる。従って、アンプ12の出力電力の安定化を図ることができる。   As described above, in this embodiment, the fixed attenuator 14 having a predetermined attenuation is placed in front of the detection diode 15 to optimize the power input to the detection diode 15. Thereby, the temperature fluctuation of the detection voltage in the detection diode 15 can be reduced. For example, if the input power of the detection diode 15 is optimized to an amount of power (for example, A [dBm] shown in FIG. 2) at which the detection voltage does not fluctuate, temperature fluctuation of the detection voltage can be eliminated. Therefore, the output power of the amplifier 12 can be stabilized.

また、固定減衰器14を検波ダイオード15に対して前置するだけでよいので、温度センサなどの部品や、複雑な制御を必要としない。従って、複雑な制御を必要とせず、また部品点数を増やすことなく、出力電力検出回路の温度特性変化を低減することができる。   Further, since the fixed attenuator 14 only needs to be placed in front of the detection diode 15, no components such as a temperature sensor or complicated control is required. Therefore, the temperature characteristic change of the output power detection circuit can be reduced without requiring complicated control and without increasing the number of components.

なお、本実施形態では、検波ダイオード15の検波電圧をALC処理回路16に入力する場合を例にしたが、図3に示すような、検波ダイオード15の検波電圧を処理する位相処理回路17を含む回路にも本発明を適用することができる。図3は、本発明による電力制御回路の第1の実施形態の他の構成を示す説明図である。図3に示す回路は、ALC処理回路16の代わりに位相処理回路17が配置されている。また、可変減衰器11の代わりに可変移相器18が配置されている。図3に示す回路においても同様に、検波ダイオード15に入力される電力が最適化されるため、温度変動による出力電力の誤差を低減することが可能である。   In the present embodiment, the case where the detection voltage of the detection diode 15 is input to the ALC processing circuit 16 is taken as an example. However, the phase processing circuit 17 that processes the detection voltage of the detection diode 15 as shown in FIG. 3 is included. The present invention can also be applied to circuits. FIG. 3 is an explanatory diagram showing another configuration of the first embodiment of the power control circuit according to the present invention. In the circuit shown in FIG. 3, a phase processing circuit 17 is arranged instead of the ALC processing circuit 16. Further, a variable phase shifter 18 is arranged instead of the variable attenuator 11. Similarly, in the circuit shown in FIG. 3, since the power input to the detection diode 15 is optimized, it is possible to reduce an error in output power due to temperature fluctuation.

また、図4に示すように、ALC処理回路16を、検波ダイオード15の検波電圧を入力とするAGC(Automatic Gain Control)処理回路19に置き換えた、高周波アンプのAGC回路にも、本発明を適用することができる。図4は、本発明による電力制御回路の第1の実施形態の他の構成を示す説明図である。図4に示すAGC回路においても同様に、検波ダイオード15に入力される電力が最適化されるため、温度変動による出力電力の誤差を低減することが可能である。   Further, as shown in FIG. 4, the present invention is also applied to an AGC circuit of a high-frequency amplifier in which the ALC processing circuit 16 is replaced with an AGC (Automatic Gain Control) processing circuit 19 that receives the detection voltage of the detection diode 15. can do. FIG. 4 is an explanatory diagram showing another configuration of the first embodiment of the power control circuit according to the present invention. Similarly, in the AGC circuit shown in FIG. 4, since the power input to the detection diode 15 is optimized, it is possible to reduce an error in output power due to temperature fluctuation.

図5は、本発明による電力制御回路の最小構成を示すブロック図である。図5に示すように、電力制御回路は、電力増幅器1(図1に示すアンプ12に相当。)の出力電力の一部を入力し、検波電圧を出力する出力電力検出回路2(図1に示す検波ダイオード15に相当。)と、検波電圧に応じて、電力増幅器1の出力電力が目標値になるように電力増幅器1に入力される電力を制御する処理回路3(図1に示す可変減衰器11およびALC処理回路16に相当。)と、電力増幅器1の出力電力の目標値と、出力電力検出回路2の温度特性とにもとづいて決定された減衰量で、出力電力検出回路2に入力される電力を減衰する減衰器4(図1に示す固定減衰器14に相当。)とを含む。   FIG. 5 is a block diagram showing the minimum configuration of the power control circuit according to the present invention. As shown in FIG. 5, the power control circuit receives a part of the output power of the power amplifier 1 (corresponding to the amplifier 12 shown in FIG. 1) and outputs an output voltage detection circuit 2 (shown in FIG. 1). And a processing circuit 3 (variable attenuation shown in FIG. 1) that controls the power input to the power amplifier 1 so that the output power of the power amplifier 1 becomes a target value in accordance with the detection voltage. And an attenuation amount determined based on the target value of the output power of the power amplifier 1 and the temperature characteristic of the output power detection circuit 2 and is input to the output power detection circuit 2. And an attenuator 4 (corresponding to the fixed attenuator 14 shown in FIG. 1).

そのような構成によれば出力電力検出回路における、検波電圧の温度変動を低減すことができ、アンプの出力電力の安定化を図ることができる。また、減衰器を出力電力検出回路に対して前置するだけでよいので、温度センサなどの部品や、複雑な制御を必要としない。従って、複雑な制御を必要とせず、また部品点数を増やすことなく、出力電力検出回路の温度特性変化を低減することができる。   According to such a configuration, the temperature fluctuation of the detection voltage in the output power detection circuit can be reduced, and the output power of the amplifier can be stabilized. Further, since the attenuator only needs to be placed in front of the output power detection circuit, components such as a temperature sensor and complicated control are not required. Therefore, the temperature characteristic change of the output power detection circuit can be reduced without requiring complicated control and without increasing the number of components.

上記の実施形態には、以下のような電力制御回路も開示されている。   In the above embodiment, the following power control circuit is also disclosed.

(1)減衰器4は、出力電力検出回路2に入力される電力が、検波電圧の温度変動を最も小さくすると判断された電力量になるように、出力電力検出回路2に入力される電力を減衰する電力制御回路。 (1) The attenuator 4 supplies the power input to the output power detection circuit 2 so that the power input to the output power detection circuit 2 becomes the amount of power determined to minimize the temperature fluctuation of the detection voltage. Attenuating power control circuit.

そのような構成によれば、検波電圧の変動をより確実に小さくすることができる。また、出力電力検出回路の入力電力を、検波電圧が温度変動しない電力量(例えば、図2に示すA[dBm])にすることにより、検波電圧の温度変動を無くすことが可能となる。   According to such a configuration, fluctuations in the detection voltage can be reduced more reliably. In addition, by making the input power of the output power detection circuit an amount of electric power (for example, A [dBm] shown in FIG. 2) at which the detection voltage does not fluctuate, temperature fluctuation of the detection voltage can be eliminated.

(2)処理回路3が、検波電圧に応じて電力増幅器1に入力される電力を減衰する電力制御回路。 (2) A power control circuit in which the processing circuit 3 attenuates the power input to the power amplifier 1 in accordance with the detected voltage.

(3)処理回路3(図4に示す可変減衰器11およびAGC処理回路19に相当。)が、検波電圧に応じて電力増幅器1の利得を制御する電力制御回路。 (3) A power control circuit in which the processing circuit 3 (corresponding to the variable attenuator 11 and the AGC processing circuit 19 shown in FIG. 4) controls the gain of the power amplifier 1 in accordance with the detection voltage.

(4)処理回路3(図3に示す可変移相器18および位相処理回路17に相当。)が、検波電圧に応じて電力増幅器1に入力される信号の位相を制御する電力制御回路。 (4) A power control circuit in which the processing circuit 3 (corresponding to the variable phase shifter 18 and the phase processing circuit 17 shown in FIG. 3) controls the phase of the signal input to the power amplifier 1 in accordance with the detected voltage.

上記の実施形態には、以下のような減衰器(温度補償回路)も開示されている。   In the above embodiment, the following attenuators (temperature compensation circuits) are also disclosed.

(5)電力増幅器1の出力電力の一部を入力し、検波電圧を出力する出力電力検出回路2と、検波電圧に応じて、電力増幅器1の出力電力が目標値になるように電力増幅器1に入力される電力を制御する処理回路3とを含む電力制御回路において、電力増幅器1の出力電力の目標値と、出力電力検出回路2の温度特性とにもとづいて決定された減衰量で、出力電力検出回路2に入力される電力を減衰する温度補償回路。 (5) An output power detection circuit 2 that inputs a part of the output power of the power amplifier 1 and outputs a detection voltage, and the power amplifier 1 so that the output power of the power amplifier 1 becomes a target value according to the detection voltage. In the power control circuit including the processing circuit 3 for controlling the power input to the output, the output is determined with the attenuation determined based on the target value of the output power of the power amplifier 1 and the temperature characteristic of the output power detection circuit 2. A temperature compensation circuit that attenuates the power input to the power detection circuit 2.

そのような構成によれば、複雑な制御を必要とせず、また部品点数を増やすことなく、電力制御回路における出力電力検出回路の温度特性変化を低減することができる。   According to such a configuration, it is possible to reduce a change in temperature characteristics of the output power detection circuit in the power control circuit without requiring complicated control and without increasing the number of components.

(6)出力電力検出回路2に入力される電力が、検波電圧の温度変動を最も小さくすると判断された電力量になるように、出力電力検出回路2に入力される電力を減衰する温度補償回路。 (6) A temperature compensation circuit for attenuating the power input to the output power detection circuit 2 so that the power input to the output power detection circuit 2 becomes an amount of power determined to minimize the temperature fluctuation of the detection voltage. .

そのような構成によれば、検波電圧の変動をより確実に小さくすることができる。また、出力電力検出回路の入力電力を、検波電圧が温度変動しない電力量(例えば、図2に示すA[dBm])にすることにより、検波電圧の温度変動を無くすことが可能となる。   According to such a configuration, fluctuations in the detection voltage can be reduced more reliably. In addition, by making the input power of the output power detection circuit an amount of electric power (for example, A [dBm] shown in FIG. 2) at which the detection voltage does not fluctuate, temperature fluctuation of the detection voltage can be eliminated.

1 電力増幅器
2 出力電力検出回路
3 処理回路
4 減衰器
10 変減衰器
11 可変減衰器
12 増幅器(アンプ)
13 方向性結合器
14 固定減衰器
15 検波ダイオード
16 ALC処理回路
17 位相処理回路
18 可変移相器
19 AGC処理回路
DESCRIPTION OF SYMBOLS 1 Power amplifier 2 Output power detection circuit 3 Processing circuit 4 Attenuator 10 Variable attenuator 11 Variable attenuator 12 Amplifier (amplifier)
DESCRIPTION OF SYMBOLS 13 Directional coupler 14 Fixed attenuator 15 Detection diode 16 ALC processing circuit 17 Phase processing circuit 18 Variable phase shifter 19 AGC processing circuit

Claims (7)

電力増幅器の出力電力の一部を入力し、検波電圧を出力する出力電力検出回路と、
前記検波電圧に応じて、前記電力増幅器の出力電力が目標値になるように前記電力増幅器に入力される電力を制御する処理回路と、
前記電力増幅器の出力電力の目標値と、前記出力電力検出回路の温度特性とにもとづいて決定された減衰量で、前記出力電力検出回路に入力される電力を減衰する減衰器とを含む
ことを特徴とする電力制御回路。
An output power detection circuit that inputs a part of the output power of the power amplifier and outputs a detection voltage;
A processing circuit for controlling the power input to the power amplifier so that the output power of the power amplifier becomes a target value according to the detection voltage;
An attenuator for attenuating the power input to the output power detection circuit with an attenuation determined based on a target value of the output power of the power amplifier and a temperature characteristic of the output power detection circuit. A characteristic power control circuit.
減衰器は、出力電力検出回路に入力される電力が、検波電圧の温度変動を最も小さくすると判断された電力量になるように、前記出力電力検出回路に入力される電力を減衰する
請求項1に記載の電力制御回路。
The attenuator attenuates the power input to the output power detection circuit so that the power input to the output power detection circuit becomes an amount of power determined to minimize the temperature fluctuation of the detection voltage. The power control circuit described in 1.
処理回路が、検波電圧に応じて電力増幅器に入力される電力を減衰する
請求項1または請求項2に記載の電力制御回路。
The power control circuit according to claim 1, wherein the processing circuit attenuates the power input to the power amplifier according to the detected voltage.
処理回路が、検波電圧に応じて電力増幅器の利得を制御する
請求項1または請求項2に記載の電力制御回路。
The power control circuit according to claim 1, wherein the processing circuit controls the gain of the power amplifier in accordance with the detection voltage.
処理回路が、検波電圧に応じて電力増幅器に入力される信号の位相を制御する
請求項1または請求項2に記載の電力制御回路。
The power control circuit according to claim 1, wherein the processing circuit controls a phase of a signal input to the power amplifier in accordance with the detection voltage.
検波素子による検波電圧にもとづいて出力電力を一定にする電力制御方法において、
前記出力電力の目標値と、前記検波素子の温度特性とにもとづいて決定された減衰量で、前記検波素子に入力される電力を減衰する
ことを特徴とする温度補償方法。
In the power control method of making the output power constant based on the detection voltage by the detector element,
A temperature compensation method, wherein the power input to the detector element is attenuated by an attenuation amount determined based on a target value of the output power and a temperature characteristic of the detector element.
検波素子に入力される電力が、検波電圧の温度変動を最も小さくすると判断された電力量になるように、前記検波素子に入力される電力を減衰する
請求項6に記載の温度補償方法。
The temperature compensation method according to claim 6, wherein the power input to the detection element is attenuated so that the power input to the detection element is an amount of power determined to minimize the temperature fluctuation of the detection voltage.
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