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JP2004048797A - Transmitter and power amplifier - Google Patents

Transmitter and power amplifier

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JP2004048797A
JP2004048797A JP2003320597A JP2003320597A JP2004048797A JP 2004048797 A JP2004048797 A JP 2004048797A JP 2003320597 A JP2003320597 A JP 2003320597A JP 2003320597 A JP2003320597 A JP 2003320597A JP 2004048797 A JP2004048797 A JP 2004048797A
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power
means
amplification
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conditions
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Makoto Katagishi
Shiro Machida
片岸 誠
町田 史郎
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Hitachi Ltd
株式会社日立製作所
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Abstract

<P>PROBLEM TO BE SOLVED: To reduce current consumption of a transmitter in a CDMA type mobile telephone. <P>SOLUTION: In accordance with transmission powers, n (n>2) bias setting conditions of a power amplification means are stored and when sending a desired transmission power, optimal combination of stored gains and bias conditions is selected. Based upon the selected conditions, a variable amplification means 1 and a power amplification means 2 are controlled. <P>COPYRIGHT: (C)2004,JPO

Description

本発明は、出力電力制御が可能な送信機とそれに適用可能な電力増幅器の構成、およびその制御方法に関する。 The present invention, structure applicable power amplifier thereto and output power control capable transmitter, and a control method thereof. 特に制御幅が大きいCDMA方式携帯電話に適した送信機に関する。 Particularly to a transmitter control range is suitable for large CDMA system cellular phone.

従来の技術の一例としてCDMA(符号分割多元接続)方式携帯電話を挙げて説明する。 Cited CDMA (Code Division Multiple Access) scheme mobile phone will be described as an example of the prior art. ここではCDMA方式の代表的な規格として米国のTIA IS− Here in the United States as a typical standard of the CDMA system TIA IS-
95を考える。 Given the 95. 送信機の構成の一例を図7に示す。 An example of a configuration of the transmitter shown in FIG. 変調信号は送信周波数帯に周波数変換された後、可変増幅手段1、電力増幅手段2、アンテナ共用器3を介してアンテナ4より送出される。 After the modulation signal is frequency-converted to the transmission frequency band, variable amplifying means 1, the power amplifier unit 2, it is transmitted from the antenna 4 via an antenna duplexer 3. ここで、可変増幅手段1はアンテナ4における所望の送信電力値となるよう制御手段6によって利得を調節される。 Here, variable amplifying means 1 is adjusted gain by the control means 6 so that a desired transmission power value at the antenna 4. IS−95では基地局の受信電力を一定にするため開ループおよび閉と呼ばれる電力制御を行う。 The received power of the base station in the IS-95 performs power control, called open-loop and closed to constant. 開ループ制御は受信手段5によって検出された受信電界強度情報によって一義的に送信電力値を決定するもので精度はあまり要求されない(±9.5dB) Open-loop control accuracy is not so much required by what determines the uniquely transmission power value by the reception field strength information detected by the receiving means 5 (± 9.5 dB)
. 一方、閉ループ制御は基地局より送られてくる利得の増減情報に基づきより細かい制御を行う(1dBステップ)。 On the other hand, closed loop control performing finer control than on the basis of the increase or decrease information gain transmitted from the base station (1 dB steps). 送信機は始めに開ループ制御を行った後に閉ループ制御に移行し、基地局が要求する所望の送信電力値に収束する。 The transmitter proceeds to closed-loop control after the open loop control was performed at the beginning, converges to a desired transmission power value which the base station requests.

上記のように送信機の送信電力値を可変増幅手段1を制御することによって行っているが、消費電流低減を目的として電力増幅手段2のバイアス条件を送信電力値に応じて制御する方法が一般に考えられている(例えば、特許文献1参照)。 Is performed by controlling the variable amplifying means 1 the transmission power value of the transmitter as described above, the bias conditions of the power amplifier unit 2 to a method of controlling in accordance with the transmission power value is generally for the purpose of current consumption reduction are considered (for example, see Patent Document 1).
この場合の制御を図8を用いて説明する。 The control in this case will be described with reference to FIG.

電力増幅手段2に例えばディプレッション型GaAsFETを用いた場合、ゲートに印加するバイアスを変化させると出力電力と消費電流の関係が変化する(図8の破線)。 When using, for example, depression type GaAsFET to the power amplifier unit 2, the relationship between the output power and the current consumption changing the bias applied to the gate changes (broken lines in FIG. 8). ゲート電圧を下げれば(バイアス設定値=B1)、消費電流が減るが最大出力電力は低下する。 By lowering the gate voltage (bias setting value = B1), current consumption is reduced maximum output power decreases. 逆にゲート電圧を上げれば(バイアス設定値=B2)、最大出力電力は向上するが消費電流が増加する。 Increasing the gate voltage in the reverse (bias setting value = B2), the maximum output power current consumption is increased to improve. この特性を利用して電力増幅手段2のバイアス条件を任意の出力電力の設定値で切換えると、低い出力電力においての消費電流低減が可能となる(図8の実線)。 When using this characteristic switching the bias conditions of the power amplifying means 2 in the set value of any of the output power, it is possible to reduce current consumption in the low output power (solid line in FIG. 8). 具体的には可変増幅手段1に対する制御信号をレベル判定手段9によって判別し、任意のしきい値を境に電力増幅手段2のバイアスを切換える。 Specifically the control signal for the variable amplifying means 1 and determined by level determination means 9 switches the bias of the power amplifier unit 2 the boundary of any threshold.

特開平9−46152号公報 JP 9-46152 discloses

従来の技術は、例えば20dB程度の可変幅で4dBステップの制御を行うPDC方式(RCR STD−27)で有効である。 The prior art is effective, for example, the PDC system for controlling a 4dB step at about 20dB of variable width (RCR STD-27). 一方、IS−95では70dB以上の可変幅で1dBステップの制御を行うため、消費電流を低減するためにはより細やかなバイアス制御が必要になる。 Meanwhile, for controlling the 1dB steps IS-95 At 70dB or more variable widths, it is required finer bias control in order to reduce current consumption.

上記課題は以下の制御を行うことにより解決される。 The above object is achieved by performing the following control. 即ち、制御手段6が電力増幅手段2における任意の出力電力を得る可変増幅手段1の利得および電力増幅手段2のバイアス条件の組合わせをn個(n>2)の電力増幅手段2の出力電力に対応付けて記憶する。 That is, the output power of the power amplifying means 2 of the combination of n bias condition of the control means 6 to obtain any output power in the power amplifier unit 2 variable amplifying means 1 of gain and power amplifying circuit 2 (n> 2) It is stored in association with. さらに、電力増幅手段2における所望の出力電力を発生するときに、記憶した利得およびバイアス条件の組合わせの中から最適なものを1つ選択し、選択した条件に基づいて可変増幅手段1および電力増幅手段2を制御する。 Furthermore, when generating a desired output power in the power amplifier unit 2, one selects the best ones from among the combinations of the stored gain and bias conditions, variable amplifying means 1 and the power based on the selection criteria controlling the amplifying means 2. または、電力増幅手段2のバイアス条件を電力増幅手段2の出力電力あるいは可変増幅手段1における利得設定値の関数として記憶し、電力増幅手段2における所望の出力電力を発生するときに記憶した関数を用いて算出されたバイアス制御信号と利得制御信号に基づいて可変増幅手段1および電力増幅手段2を制御する。 Or the function stored when storing the bias conditions of the power amplifier unit 2 as a function of the gain setting value in the output power or variable amplifying means 1 of the power amplifying means 2 to generate the desired output power in the power amplifier unit 2 controlling the variable amplifying means 1 and the power amplifier unit 2 based on a bias control signal and the gain control signal calculated using.

電力増幅手段のバイアス条件を送信電力に応じて細かく制御することにより、消費電流の低減が実現できる。 By finely controlled in accordance with the transmission power bias conditions of the power amplifying means, a reduction in current consumption can be realized.

以下、本発明の実施例を図面を用いて詳細に説明する。 It will be described in detail with reference to the drawings an embodiment of the present invention. 従来技術と同様に C As with prior art C
DMA(符号分割多元接続)方式携帯電話に適用した場合を例に挙げて説明する。 Is applied to a DMA (code division multiple access) scheme mobile phone will be described as an example.

図1は本発明の第1の実施例を示すシステム構成図である。 Figure 1 is a system configuration diagram showing a first embodiment of the present invention. 前述の従来技術と同様の構成であるがその制御方法が異なる。 Is a prior art similar to the preceding configuration control method thereof are different. 制御方法を図2を用いて説明する。 The control method will be described with reference to FIG.

可変増幅手段1はアンテナ4における所望の送信電力値となるよう制御手段6によって利得を調節され、このときの設定値を制御手段6が記憶している(図2中G1、G2、…、Gnのn個、n>2)。 Variable amplifying means 1 is adjusted gain by the control means 6 so that a desired transmission power value at the antenna 4, and stores the set value control means 6 is (in FIG. 2 G1, G2 at this time, ..., Gn n-number of, n> 2). さらに制御手段6は可変増幅手段1 Further, the control means 6 variable amplifying means 1
の各設定に対応した電力増幅手段2のバイアス条件を記憶している(図2中B1 Stores the bias conditions of the power amplifier unit 2 corresponding to the respective setting (in FIG. 2 B1
、B2、…、Bn のn個、n>2)。 , B2, ..., n-number of Bn, n> 2). 電力増幅手段2のバイアス条件が一定のときは図2の破線に示すように、バイアス条件によって最大出力電力と消費電流の関係が異なる。 As indicated by the broken line in FIG. 2 when the bias conditions of the power amplifying means 2 is constant, the relationship between the maximum output power and the current consumption by the bias conditions are different. この関係を利用し、可変増幅手段1の利得に応じてバイアス条件を変えた場合図2の実線のような特性を得ることができる。 Using this relationship, it is possible to obtain the characteristic shown by the solid line in the case Figure 2 by changing the bias conditions according to the gain of the variable amplifying means 1. したがって、同一の出力電力が得られ且つ消費電流の少ないバイアス条件を選択して記憶し、所望の送信電力を送出するときに記憶した条件に基づいて可変増幅手段1および電力増幅手段2を制御することにより送信機の消費電流を低減することができる。 Therefore, to select the low bias condition of and current consumption obtained by the same output power is stored, controlling the variable amplifying means 1 and the power amplifier unit 2 based on the stored condition when delivering the desired transmission power it is possible to reduce the current consumption of the transmitter by. 実際には送信電力以外の性能(隣接チャネル電力漏洩など)を満たす範囲内でバイアス条件を選ぶことになるが、前述の従来技術と比較し、消費電流を削減できる送信電力範囲が著しく広くすることができる。 Actually will be selected bias condition within a range that satisfies the performance other than the transmission power (such as adjacent channel power leakage) in, compared with the prior art described above, transmission power ranges that can reduce current consumption widely remarkably that can.

また、本実施例においてn個のバイアス条件を用いる代わりに、電力増幅手段2のバイアス条件を電力増幅手段2の出力電力あるいは可変増幅手段1における利得設定値の関数として記憶しても良い。 Also, instead of using the n number of bias conditions in the present embodiment may store the bias conditions of the power amplifier unit 2 as a function of the gain setting value in the output power or variable amplifying means 1 of the power amplifying means 2. この場合、所望の電力増幅手段2の出力電力を発生するときに記憶した関数を用いて算出された電力増幅手段2のバイアス制御信号および可変増幅手段1の利得設定値に基づいて可変増幅手段1および電力増幅手段2を制御する。 In this case, variable amplifying means 1 on the basis of the bias control signal and the gain setting value of the variable amplifying means 1 of the power amplifying means 2 which is calculated by using a function stored in generating a desired output power of the power amplifier means 2 and controlling the power amplifying means 2. その結果、送信機の消費電流低減が可能となる。 As a result, it is possible to reduce current consumption of the transmitter.

図3は本発明の第2の実施例を示すシステム構成図である。 Figure 3 is a system configuration diagram showing a second embodiment of the present invention. 本実施例は第1の実施例において電力増幅手段2のバイアスを制御するバイアス制御信号にパルス幅変調(PWM)を用いた場合である。 This embodiment is a case where a pulse width modulation (PWM) to the bias control signal for controlling the bias of the power amplifier unit 2 in the first embodiment. 一般に、バイアスを制御する場合は制御手段内に具備されたD/A(ディジタル・アナログ変換器)によって発生する直流電圧をバイアス制御信号に用いることがある。 Generally, when controlling a bias may be used a DC voltage generated by provided in the control means a D / A (digital-to-analog converter) to the bias control signal. しかし、出力電圧の分解能を上げると高価なD/Aが必要となるとういう問題が発生する。 However, expensive D / A is a problem that shaking is needed to generate increasing the resolution of the output voltage. PWMを用いた場合、D/Aが不要となりコスト低減が可能になる。 When using PWM, D / A is enabled to reduce the cost becomes unnecessary. また、第1の実施例に示したようなバイアス条件を関数で算出する場合の実装に都合がよい。 Further, it is convenient to implement in the case of calculating the bias conditions shown in the first embodiment in function. バイアス制御信号にPWMを用いた場合に適した電力増幅手段2の構成は図3に示すように内部に平滑回路を設け、電力増幅手段2の内部でバイアスに変換する。 Configuration of the power amplifying means 2 suitable for the case of using the PWM to the bias control signal is provided to a smoothing circuit therein as shown in FIG. 3, is converted to a bias in the internal power amplifying means 2. この場合、平滑手段が電力増幅手段2の内部に設けられたことにより外来雑音による影響を軽減することができる。 In this case, it is possible to reduce the effect of external noise by smoothing means is provided in the power amplifying circuit 2.

図4は本発明の第3の実施例を示すシステム構成図であり、可変増幅手段1と電力増幅手段2を統合した電力増幅器8の構成を示している。 Figure 4 shows a third is a system configuration diagram showing an example of the configuration of the variable amplifying means 1 and the power amplifier 8 which integrates the power amplifying means 2 of the present invention. 一般に可変増幅手段1と電力増幅手段2を統合した場合図9に示すように可変増幅手段1と電力増幅手段2に対する各制御信号は別々の端子を介して入力されていた。 Each control signal for the variable amplifying means 1 and the power amplifier unit 2 as shown if Figure 9 generally integrates variable amplifying means 1 and the power amplifier unit 2 has been input via separate terminals. 所望の送信電力を得るこれら制御信号の組合わせが1つの送信電力値に対して1組にも関わらずである。 Combination of these control signals to obtain the desired transmit power is despite a set for one transmission power value. 本実施例では所望の出力電力を得るための制御信号は唯一とし、電力増幅器8の内部に可変増幅手段1の利得制御信号および電力増幅手段2のバイアス制御信号を発生する信号発生手段7を設けている。 Control signal for obtaining a desired output power in the present embodiment is the only, provided a signal generating means 7 for generating a bias control signal of the variable amplifying means 1 of the gain control signal and the power amplifying means 2 in the interior of the power amplifier 8 ing. 信号発生手段7は制御手段6からの制御信号に応じて利得制御信号およびバイアス制御信号を発生する。 Signal generating means 7 generates a gain control signal and bias control signal in response to a control signal from the control means 6. 以上の構成により制御手段6の処理を軽減できる使い勝手の良い電力増幅器8が得られる。 Processing good power amplifier 8 convenient that can reduce the control means 6 is obtained by the above construction.

図5は本発明の第4の実施例を示すシステム構成図であり、最大電力検出機能を有する電力増幅器8とそれを具備する送信機の構成を示している。 Figure 5 is a system configuration diagram showing a fourth embodiment of the present invention illustrating a configuration of a transmitter comprising it and power amplifier 8 with a maximum power detecting function. IS−95では前述のように基地局から送られてくる送信電力増減信号によって送信電力を制御する(前述の閉ループ制御)。 Controlling the transmission power by the transmission power decrease signal transmitted from the base station as described above in the IS-95 (closed-loop control of the above). したがって、基地局が自局の送信電力を検出するので、基本的には自局内での電力検出は不要である。 Accordingly, since the base station detects transmission power of the own station, basically the power detection in the local station is not required. しかし実際には特表平8−510614に示されているように、基地局より送られてくる送信電力増減信号が送信機の(歪み等の特性保証範囲内での)最大出力を超えてしまう場合があり、これを検出して送信出力を制限するために図10に示すような電力検出の構成が必要である。 In practice, however, as shown in Kohyo 8-510614, the transmission power increase or decrease signal sent from the base station transmitter (within the characteristics specified range of the distortion, etc.) exceeds the maximum output If there is a need to configure the power detection as shown in FIG. 10 in order to limit the transmission power to detect this. すなわち、電力増幅手段2の出力の一部を結合器203を介して電力検出手段204に導き、制御手段が電力検出手段204の出力を任意のしきい値と比較することにより最大電力の検出・判別を行う。 That leads to the power detection unit 204 a portion of the output of the power amplifier means 2 via a coupler 203, detected and the maximum power by the control means for comparing the output of the power detection unit 204 and any threshold It discriminates. これに対し本実施例では、結合器203、電力検出手段204および最大電力の判別を行う判別手段205を電力増幅器8に具備している。 In this embodiment contrast, it has a coupler 203, power detection unit 204 and the judging means 205 for discriminating the maximum power provided to the power amplifier 8. 判別手段205は最大電力を検出した場合に任意の信号を制御手段6に出力するとともに増幅器202の出力電飾を制限するよう制御する。 Discriminating means 205 controls to limit the output illuminations of the amplifier 202 outputs a given signal to the control means 6 when detecting the maximum power. この構成により送信機の部品数削減が可能になるとともに、制御手段6の処理を軽減できる使い勝手の良い電力増幅器8が得られる。 Together allowing the component reducing the number of transmitters This configuration may power amplifier 8 convenient processing can reduce the control means 6 is obtained.

図6は本発明の第5の実施例を示すシステム構成図であり、最大電力検出あるいは過電流検出機能を有する電力増幅器8とそれを具備する送信機の構成を示している。 Figure 6 is a system configuration diagram showing a fifth embodiment of the present invention illustrating a configuration of a transmitter comprising it and power amplifier 8 with a maximum power detection or overcurrent detecting function. 電力増幅器8の出力電力と消費電流の間には相関があるので、第4の実施例で述べた最大電力検出を電流値で検出することが可能である。 Since between the output power and the current consumption of the power amplifier 8 are correlated, it is possible to detect the maximum power detection described in the fourth embodiment in the current value. 電流値の検出は電流検出手段206で行いこの出力値が任意のしきい値を超えた場合に任意の信号を制御手段6に出力するとともに増幅器202の出力電飾を制限するよう制御する。 Detection of the current value is controlled so as to limit the output illuminations of the amplifier 202 outputs a given signal to the control means 6 when the output value is performed by the current detecting means 206 has exceeded an arbitrary threshold. この構成により送信機の部品数削減が可能になるとともに、制御手段6の処理を軽減できる使い勝手の良い電力増幅手段2が得られる。 Together allowing the number of parts reduces the transmitter by this arrangement, the processing power amplifying means 2 good usability can reduce the control means 6 is obtained. さらに第4の実施例に対し信号経路に結合器203を有していないため低損失となり、電力増幅器8の省電流化を図ることができる。 Becomes low loss for further does not have a coupler 203 to the signal path to the fourth embodiment, it is possible to save the current of the power amplifier 8.

本実施例において、しきい値を増幅器202の異常を示す値として別に設け、電流検出手段206の出力値がこのしきい値を超えた場合に任意の信号を制御手段6に出力するとともに増幅器202の動作を停止するよう制御することにより電力増幅器8の故障検出および破壊防止が可能となる。 In the present embodiment, amplifier 202 along with separately provided as a value indicating the abnormality of the amplifier 202 the threshold, the output value of the current detection means 206 outputs a given signal to the control unit 6 if it exceeds this threshold it is possible to fault detection and destruction preventing the power amplifier 8 by controlling to stop the operation.

なお、上記実施例の構成において、可変増幅手段1および電力増幅手段2の間にフィルタ等が挿入されても同様の効果が得られることは自明である。 In the configuration of the above embodiment, the same effect can filter or the like is inserted between the variable amplifying means 1 and the power amplifier unit 2 is obtained is obvious.

本発明の第1の実施例を示す構成図。 Diagram showing a first embodiment of the present invention. 本発明の第1の実施例の制御を説明する図。 Diagram for explaining the control of the first embodiment of the present invention. 本発明の第2の実施例を示す構成図。 Block diagram showing the second embodiment of the present invention. 本発明の第3の実施例を示す構成図。 Diagram showing a third embodiment of the present invention. 本発明の第4の実施例の制御を説明する図。 Diagram for explaining the control of the fourth embodiment of the present invention. 本発明の第5の実施例を示す構成図。 Diagram showing a fifth embodiment of the present invention. 従来の技術の一例を説明する構成図。 Configuration diagram for explaining an example of a conventional art. 従来の技術における制御の一例を説明する図。 Diagram for explaining an example of control in the prior art. 従来の技術の一例を説明する構成図。 Configuration diagram for explaining an example of a conventional art. 従来の技術の一例を説明する構成図。 Configuration diagram for explaining an example of a conventional art.

符号の説明 DESCRIPTION OF SYMBOLS

1…可変増幅手段、2…電力増幅手段、3…アンテナ共用器、4…アンテナ、 1 ... variable amplifying means, 2 ... power amplifying means, 3 ... antenna duplexer, 4 ... antenna,
5…受信手段、6…制御手段、7…信号発生手段、8…電力増幅器、9…レベル判定手段、201…平滑手段、202…増幅器、203…結合器、204…電力検出手段、205…判別手段、206…電流検出手段。 5 ... receiving unit, 6 ... control unit, 7 ... signal generator, 8 ... power amplifier 9 ... level determining means, 201 ... smoothing means, 202 ... amplifier, 203 ... coupler, 204 ... power detection unit, 205 ... determination I mean, 206 ... current detection means.

Claims (11)

  1. 送信電力を可変制御可能な送信機において、利得制御信号に応じて出力電力を制御する可変増幅手段と、該可変増幅手段の出力信号を増幅する電力増幅手段と、該電力増幅手段のバイアス条件および上記可変増幅手段の利得を制御する制御手段を具備し、 In the transmission power control variably transmitter, a variable amplifying means for controlling the output power according to the gain control signal, a power amplifier for amplifying the output signal of the variable amplifying means, and bias conditions of the power amplifying means comprising a control means for controlling a gain of the variable amplifying means,
    該制御手段は、上記電力増幅手段における任意の出力電力を得る上記可変増幅手段の利得および上記電力増幅手段のバイアス条件の組合わせをn個(n>2)の上記電力増幅手段の出力電力に対応付けて記憶し、上記電力増幅手段における所望の出力電力を発生するときに記憶した上記利得制御信号および上記バイアス制御信号の組合わせの中から最適なものを1つ選択し、該選択した組合わせに基づいて上記可変増幅手段および上記電力増幅手段を制御することを特徴とする送信機。 Control means, a combination of bias conditions of the gain and the power amplifying circuit of the variable amplifying means to obtain an arbitrary output power to the output power of the power amplification means of n (n> 2) in the power amplifying means association and stored, the optimum one among the combinations of the gain stored control signal and the bias control signal in generating a desired output power in said power amplifying means one selected set of the said selected transmitter and controlling the variable amplifying means and the power amplifying means based on combined.
  2. 送信電力を可変制御可能な送信機において、利得制御信号に応じて出力電力を制御する可変増幅手段と、該可変増幅手段の出力信号を増幅する電力増幅手段と、該電力増幅手段のバイアス条件および上記可変増幅手段の利得を制御する制御手段を具備し、 In the transmission power control variably transmitter, a variable amplifying means for controlling the output power according to the gain control signal, a power amplifier for amplifying the output signal of the variable amplifying means, and bias conditions of the power amplifying means comprising a control means for controlling a gain of the variable amplifying means,
    該制御手段は、上記電力増幅手段のバイアス条件を上記電力増幅手段の出力電力あるいは上記可変増幅手段における利得設定値の関数として記憶し、上記電力増幅手段における所望の出力電力を発生するときに記憶した関数を用いて算出されたバイアス制御信号と上記利得制御信号に基づいて上記可変増幅手段および上記電力増幅手段を制御することを特徴とする送信機。 Control means, the bias conditions of the power amplifier means is stored as a function of the gain setting value in the output power or the variable amplifying means of the power amplifying means, stored in generating a desired output power in said power amplifying means transmitter and controlling the variable amplifying means and the power amplifying means based on a bias control signal calculated using the function and the gain control signal.
  3. 請求項1乃至2に記載の送信機において、前記制御手段が前記電力増幅手段のバイアス条件を制御する信号としてパルス幅変調(PWM)を用いることを特徴とする送信機。 At the transmitter according to claim 1 or 2, the transmitter by the control means is characterized by using a pulse width modulation (PWM) as a signal for controlling the bias condition of said power amplifying means.
  4. 請求項3に記載の送信機に適用可能な電力増幅手段において、前記制御手段が出力するパルス幅変調(PWM)信号を平滑する手段を設けたことを特徴とする電力増幅器。 In applicable power amplifying means to the transmitter of claim 3, the power amplifier, characterized in that a pulse width modulation (PWM) signals the control means outputs provided with means for smoothing.
  5. 請求項1乃至3に記載の送信機において、送信電力の制御を自局に設けた受信手段によって検出した受信電界強度に応じて制御することを特徴とした送信機。 At the transmitter according to any one of claims 1 to 3, transmitter characterized in that control according to received field intensity detected by the receiving means provided to control the transmission power to itself.
  6. 利得制御信号に応じて出力電力を制御する可変増幅手段と、該可変増幅手段の出力信号を増幅する電力増幅手段と、該電力増幅手段のバイアス条件および上記可変増幅手段の利得を制御する信号を発生する信号発生手段を具備した電力増幅器であって、 Variable amplifying means for controlling the output power according to the gain control signal, a power amplifier for amplifying the output signal of the variable amplifying means, a signal for controlling the gain of bias conditions and the variable amplifying means of the power amplifying means a power amplifier provided with the signal generating means for generating,
    上記信号発生器は該電力増幅器外部から印加されるただ1つの制御信号を入力し、該制御信号に応じて上記電力増幅手段のバイアス条件および上記可変増幅手段の利得を制御することを特徴とする電力増幅器。 The signal generator is inputted only one control signal applied from the power amplifier external, and controlling the gain of bias conditions and the variable amplifying means of the power amplifying means in response to said control signal power amplifier.
  7. 請求項6に記載の送信機において、送信電力の制御を自局に設けた受信手段によって検出した受信電界強度に応じて制御することを特徴とした送信機。 At the transmitter of claim 6, transmitter characterized in that control according to received field intensity detected by the receiving means provided to control the transmission power to itself.
  8. 増幅器と該増幅器の出力電力の一部を分離出力する結合器と、該結合器の出力電力値を検出する電力検出手段と、該電力検出手段の出力と任意のしきい値との大小関係を判別する判別手段とを具備する電力増幅器あって、 A coupler for separating the output part of the output power of the amplifier and the amplifier, a power detection means for detecting an output power value of the coupler, the magnitude relationship between the output and any of the threshold of the power detection means there power amplifier; and a discrimination means for discriminating for,
    上記電力検出手段の出力値が任意のしきい値を超えている場合に上記増幅器の動作を停止あるいは利得を低減するよう制御することを特徴とする電力増幅器。 Power amplifier and controlling so that the output value of the power detecting means to reduce the stop or gain operation of the case the amplifier is exceeded any threshold.
  9. 請求項8に記載の電力増幅器において、前記電力検出手段の出力値が任意のしきい値を超えている場合に前記増幅器の動作を停止あるいは利得を低減するよう制御するとともに、上記に具備された任意の端子にしきい値を超えたことを示す信号を出力することを特徴とする電力増幅器。 In the power amplifier according to claim 8, together with the output value of the power detecting means is controlled to reduce the stop or gain operation of the amplifier when it exceeds the arbitrary threshold, it is provided in the power amplifier and outputs a signal indicating that a threshold is exceeded on any terminal.
  10. 増幅器と該増幅器の消費電流を検出する電流検出手段と、該電流検出手段の出力と任意のしきい値との大小関係を判別する判別手段とを具備する電力増幅器であって、 A power amplifier comprising a current detector for detecting the consumption current of the amplifier and the amplifier, and a discriminating means for discriminating the magnitude relationship between the output and any of the threshold of the current detection means,
    上記電力検出手段の出力値が任意のしきい値を超えている場合に上記増幅器の動作を停止あるいは利得を低減するよう制御することを特徴とする電力増幅器。 Power amplifier and controlling so that the output value of the power detecting means to reduce the stop or gain operation of the case the amplifier is exceeded any threshold.
  11. 請求項10に記載の電力増幅器において、前記電流検出手段の出力値が任意のしきい値を超えている場合に前記増幅器の動作を停止あるいは利得を低減するよう制御するとともに、上記に具備された任意の端子にしきい値を超えたことを示す信号を出力することを特徴とする電力増幅器。 The power amplifier of claim 10, controls so that the output value of the current detecting means to reduce the stop or gain operation of the amplifier when it exceeds the arbitrary threshold, it is provided in the power amplifier and outputs a signal indicating that a threshold is exceeded on any terminal.
JP2003320597A 2003-09-12 2003-09-12 Transmitter and power amplifier Pending JP2004048797A (en)

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