JPS61193524A - Power amplifier circuit - Google Patents

Power amplifier circuit

Info

Publication number
JPS61193524A
JPS61193524A JP3158685A JP3158685A JPS61193524A JP S61193524 A JPS61193524 A JP S61193524A JP 3158685 A JP3158685 A JP 3158685A JP 3158685 A JP3158685 A JP 3158685A JP S61193524 A JPS61193524 A JP S61193524A
Authority
JP
Japan
Prior art keywords
transmission power
temperature compensation
circuit
voltage
temperature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP3158685A
Other languages
Japanese (ja)
Inventor
Yoshiki Satou
左東 芳己
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP3158685A priority Critical patent/JPS61193524A/en
Publication of JPS61193524A publication Critical patent/JPS61193524A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02Transmitters
    • H04B1/03Constructional details, e.g. casings, housings
    • H04B1/036Cooling arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transmitters (AREA)

Abstract

PURPOSE:To make transmission power stable even under a wide range of temperature conditions by providing a temperature compensation circuit giving temperature compensation corresponding to a temperature characteristic of a detection circuit to a voltage from a detection circuit corresponding to the transmission power to temperature compensation among plural transmission powers. CONSTITUTION:A detection circuit 5 detects an output signal of a power amplifier module 2, outputs a detection output, which is given to a resistance network on one hand. The resistance network 13 divides the voltage of the detection output and gives a voltage corresponding to transmission power reduction 0dB, -4dB...-24dB to input terminals t8, t7...t2 of an IC switch 9 respectively. On the other hand, the detection output is given also to a resistance network 14, which divides the voltage of the detection output and gives a voltage corresponding to a transmission power reduction -28dB to an input terminal t1 of the IC switch 9. In this case, the divided voltage is subjected to temperature compensation by a temperature compensation circuit 15. Thus, the transmission power requiring temperature compensation is subject to temperature compensation easily and properly, and when the temperature compensation is applied with very small transmission power, the transmission power is kept stable even under a wide range of temperature conditions.

Description

【発明の詳細な説明】 (産業上の利用分野) この発明は自動車電話装置等における送信電力増幅回路
に関し、更に詳細には送信電力増幅回路における送信電
力の温度補償に関する。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a transmission power amplification circuit in a car telephone device or the like, and more particularly to temperature compensation of transmission power in a transmission power amplification circuit.

(従来の技術) 従来、自動車電話装置等の送信電力増幅回路は、送信電
力を複数段−階に低減する機能を有する。これは、例え
ばシステム上アンテナ端で3Wの送信電力をOdBとし
、4 dBステップで−28dB(4,8mW ) ’
!で送信電力を可変するものである。この場合、従来の
送信電力増幅回路は、送信電力低減時における送信電力
の温度による変動を補償する機能を有する。
(Prior Art) Conventionally, a transmission power amplifier circuit of a car telephone device or the like has a function of reducing transmission power in multiple stages. For example, if the transmission power of 3W at the antenna end of the system is OdB, then -28dB (4.8mW) in 4 dB steps.
! The transmission power can be varied by In this case, the conventional transmission power amplifier circuit has a function of compensating for fluctuations in transmission power due to temperature when reducing transmission power.

第2図は、このような機能を有する従来の送信電力補償
回路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 conventional transmission power compensation circuit having such a function.

同図において、1は高周波電力入力端子、2は電力増幅
モジュール、3はアイソレータ、4は高周波電力出力端
子、5は検波回路、6,7及び8は抵抗ネットワーク、
9はICスイッチ、10は温度補償回路、11は比較回
路、及び12は論理レベル入力端子である。この動作に
ついて説明すると、高周波電力入力端子1を介して与え
られた高周波信号は電力増幅モジュール2で電力増幅さ
れ、一方においてアイソレータ3及び高周波電力出力端
子4を介して送信され、他方において検波回路5に与え
られる。検波回路5は電力増幅モジュール2の出力信号
を検波し検波出力を出力する。検波出力は抵抗ネットワ
ーク6及び7に与えられ、送信電力の−4dB  ごと
の低減量OaB 、 −4dB 。
In the figure, 1 is a high frequency power input terminal, 2 is a power amplification module, 3 is an isolator, 4 is a high frequency power output terminal, 5 is a detection circuit, 6, 7 and 8 are resistor networks,
9 is an IC switch, 10 is a temperature compensation circuit, 11 is a comparison circuit, and 12 is a logic level input terminal. To explain this operation, a high frequency signal applied via the high frequency power input terminal 1 is power amplified by the power amplification module 2, and is transmitted via the isolator 3 and the high frequency power output terminal 4 on the one hand, and the detection circuit 5 on the other hand. given to. The detection circuit 5 detects the output signal of the power amplification module 2 and outputs a detection output. The detection output is given to the resistor networks 6 and 7, and the amount of reduction OaB is -4 dB for each -4 dB of the transmission power.

−8dB・・・−28dBの8段階に対応する電圧に分
割される。分割された電圧はICスイッチ9の入力端子
t、〜t8にそれぞれ与えられる。この場合、入力端子
tI*L2・・・t8はそれぞれ−28dB 。
It is divided into voltages corresponding to 8 levels of -8dB...-28dB. The divided voltages are applied to input terminals t, -t8 of the IC switch 9, respectively. In this case, the input terminals tI*L2...t8 are each -28 dB.

−24dB・・・OdBに対応するものとする。ICス
イッチ9は論理レベル入力端子12を介して与えられる
論理レベル信号に従って、所望の送信電力低減量に対応
する電圧を抵抗ネットワーク8に与える。抵抗ネットワ
ーク8は、サーミスタで構成される温度補償回路10と
ともKICスイッチ9からの電圧を温度補償しく補正し
)、比較回路11に出力する。比較回路11は所定の基
準値と抵抗ネットワーク8からの温度補償された電圧と
を比較し、比較結果に基づいて電力増幅モジュール2を
制御する。以上のようにして、検波回路5の温度変動に
起因する送信電力の温度による変動を補償している。
-24dB... corresponds to OdB. IC switch 9 applies a voltage to resistor network 8 corresponding to a desired amount of transmission power reduction in accordance with a logic level signal applied via logic level input terminal 12. The resistor network 8 , together with a temperature compensation circuit 10 constituted by a thermistor, temperature-compensates the voltage from the KIC switch 9 ) and outputs it to a comparison circuit 11 . Comparison circuit 11 compares the temperature compensated voltage from resistor network 8 with a predetermined reference value and controls power amplification module 2 based on the comparison result. As described above, temperature-related fluctuations in transmission power caused by temperature fluctuations in the detection circuit 5 are compensated for.

(発明が解決しようとする問題点) しかしながら、このような従来の送信電力増幅回路にあ
っては、次の問題点を有する。ICスイッチ9の後段に
設けられている抵抗ネットワーク8に温度補償回路10
が接続されている構成となっているため、すべての送信
電力低減量OdB、−4dB・・・−28dBに温度補
償が働く。この場合、1つの温度補償回路10にてすべ
ての送信電力低減量に温度補償を作用させることは、実
際問題として温度補償の設定が極めて難しい。特に、例
えば−34℃のような低温で−28dB (4,8mW
 )の送信電力低減時には、上記構成では送信電力の低
下が著しいことが観測される。
(Problems to be Solved by the Invention) However, such a conventional transmission power amplifier circuit has the following problems. A temperature compensation circuit 10 is connected to the resistor network 8 provided after the IC switch 9.
are connected, temperature compensation works for all transmission power reduction amounts OdB, -4 dB, . . . -28 dB. In this case, as a practical matter, it is extremely difficult to set temperature compensation to apply temperature compensation to all transmission power reduction amounts using one temperature compensation circuit 10. In particular, -28dB (4,8mW
), it is observed that the transmission power decreases significantly in the above configuration.

従って、この発明はこれらの問題点を解決することを目
的とする。
Therefore, the present invention aims to solve these problems.

(構 成) この発明は、高周波信号を増幅する電力増幅部と、この
出力を検波する検波回路と、該検波回路の出力を分圧し
て複数段階の送信電力量に対応する複数の電圧を出力す
る電圧分割回路と、該電圧分割回路からの複数の電圧を
切換えてこのうちの1つを電力増幅部に出力する切換え
回路とを有する電力増幅回路を対象とする。この発明に
よれば、このよ5な電力増幅回路に対し、前記複数の送
信電力量のうち温度補償をすべき送信電力量に対応する
前記検波回路からの電圧に、前記検波回路の温度特性に
対応する温度補償を与える温度補償回路を設けたたとに
ある。
(Configuration) The present invention includes a power amplification section that amplifies a high-frequency signal, a detection circuit that detects the output thereof, and a voltage division of the output of the detection circuit to output a plurality of voltages corresponding to multiple levels of transmission power. The present invention is directed to a power amplifier circuit that has a voltage divider circuit that outputs a plurality of voltages from the voltage divider circuit, and a switching circuit that switches a plurality of voltages from the voltage divider circuit and outputs one of the voltages to a power amplification section. According to the present invention, for such a power amplifier circuit, the voltage from the detection circuit corresponding to the transmission power amount to be temperature compensated among the plurality of transmission power amounts is applied to the temperature characteristic of the detection circuit. A temperature compensation circuit is provided next to provide a corresponding temperature compensation.

(作 用) この発明によれば、温度補償をすべき送信電力量に対応
する検波回路からの電圧に、この検波回路の温度特性に
対応する温度補償が与えられる。
(Function) According to the present invention, temperature compensation corresponding to the temperature characteristics of the detection circuit is given to the voltage from the detection circuit corresponding to the amount of transmission power to be temperature compensated.

このように、温度補償は選択的に行なわれるので、送信
電力の温度補償設定は容易となり、広い範囲の温度条件
下であっても送信電力を安定に保つことが可能となる。
Since temperature compensation is performed selectively in this way, it becomes easy to set the temperature compensation for the transmission power, and it becomes possible to keep the transmission power stable even under a wide range of temperature conditions.

(実施例) 以下、この発明を実施例に基づき図面を参照して詳細に
説明する。
(Example) Hereinafter, the present invention will be described in detail based on an example with reference to the drawings.

第1図はこの発明の一実施例を示すブロック図である。FIG. 1 is a block diagram showing one embodiment of the present invention.

図中、第2図と同一の構成要素には同一の参照番号を付
す。第2図において、13は抵抗ネットワークで、検波
回路5からの検波出力を分圧してOdB 、 −4dB
 、 −8dB・・・−24dBの送信電力低減量に対
応する電圧を形成し、ICスイッチ9の入力端子t2〜
t8にそれぞれ供給する。
In the figure, the same reference numerals are given to the same components as in FIG. 2. In Fig. 2, 13 is a resistor network that divides the detection output from the detection circuit 5 into OdB and -4dB.
, -8 dB...--24 dB of the voltage corresponding to the transmission power reduction amount is formed, and the input terminal t2 of the IC switch 9 -
t8 respectively.

14は抵抗ネットワークで抵抗R,及びR2が直列に接
続されて構成され、検波回路14からの検波出力を分圧
して−28dBの送信電力低減量に対応する電圧を形成
し、ICスイッチ9の入力端子t1に供給する。15は
温度補償回路で、サーミスタTHと抵抗R3a R4e
 R5及びR6からなる。
14 is a resistor network configured by connecting resistors R and R2 in series, and divides the detection output from the detection circuit 14 to form a voltage corresponding to a -28 dB transmission power reduction amount, which is connected to the input of the IC switch 9. Supplied to terminal t1. 15 is a temperature compensation circuit, which includes a thermistor TH and resistors R3a and R4e.
Consists of R5 and R6.

抵抗R3#R4及びR5はサーミスタTHの非直線的動
作を直線的動作にし、微小電圧可変を可能とし送信電力
減衰量−28dB時における検波回路5の温度特性の温
度補償を行なう。ここで、第3図に温度補償回路15の
温度と温度補償電圧(温度補償回路15の出力電圧)と
の関係を示す。尚、温度補償回路15には電源端子16
を介して所定の電源が供給される。16は直流増幅器で
、ICスイッチ9の出力を直流増幅する。
Resistors R3#R4 and R5 change the non-linear operation of the thermistor TH to linear operation, enable minute voltage variation, and perform temperature compensation for the temperature characteristics of the detection circuit 5 when the transmission power attenuation is -28 dB. Here, FIG. 3 shows the relationship between the temperature of the temperature compensation circuit 15 and the temperature compensation voltage (output voltage of the temperature compensation circuit 15). Note that the temperature compensation circuit 15 has a power terminal 16.
A predetermined power is supplied via the. A DC amplifier 16 amplifies the output of the IC switch 9.

次に、動作について説明する。高周波電力入力端子1を
介して与えられた高周波信号は電力増幅モジュール2で
電力増幅され、一方においてアイソレータ3及び高周波
電力出力端子4を介して送信され、他方において検波回
路5に与えられる。
Next, the operation will be explained. A high frequency signal applied via a high frequency power input terminal 1 is power amplified by a power amplification module 2, transmitted via an isolator 3 and a high frequency power output terminal 4 on one side, and applied to a detection circuit 5 on the other side.

検波回路5は電力増幅モジュール2の出力信号を検波し
検波出力を出力する。検波出力は、一方において抵抗ネ
ットワーク13に与えられる。抵抗ネットワーク13は
この検波出力を分圧して、送信電力低減量OdB 、 
−4dB・・・−24dBに対応する電圧をICスイッ
チ9の入力端子t8.t7・・・t2にそれぞれ供給す
る。他方、検波出力は抵抗ネットワーク14に与えられ
る。抵抗ネットワーク14は検波出力を分圧して、送信
電力低減量−28dBに対応する電圧をICスイッチ9
0入力端子Hに供給する。この際、分圧された電圧は温
度補償回路15によシ温度補償される。ICスイッチ9
は、論理レベル入力端子12を介して供給される3ビツ
トの論理レベル信号に従って、入力端子t1〜七8のい
ずれか1つを選択する。選択された入力端子の電圧は、
直流増幅器17を介して比較回路11に供給される。比
較回路11は前述した如き比較を行ない、電力増幅モジ
ュール2を制御する。
The detection circuit 5 detects the output signal of the power amplification module 2 and outputs a detection output. The detection output is given to the resistor network 13 on the one hand. The resistor network 13 divides this detection output into a transmission power reduction amount OdB,
-4dB...--24dB is applied to the input terminal t8 of the IC switch 9. t7...t2 are respectively supplied. On the other hand, the detection output is given to the resistor network 14. The resistor network 14 divides the detected output and applies the voltage corresponding to the transmission power reduction amount of -28 dB to the IC switch 9.
0 input terminal H. At this time, the divided voltage is temperature compensated by the temperature compensation circuit 15. IC switch 9
selects any one of input terminals t1 to 78 according to a 3-bit logic level signal supplied via logic level input terminal 12. The voltage at the selected input terminal is
The signal is supplied to the comparison circuit 11 via the DC amplifier 17. The comparison circuit 11 performs the comparison as described above and controls the power amplification module 2.

以上のとおシ、この実施例では一34℃程度の低温にお
ける送信電力の低下が著しい−28dB送信電力低減量
に対して温度補償が行なわれるので、広い温度条件(−
34℃〜+60℃/95チ)の条件下でも送信電力の低
減動作を良好に行なうことができる。
As described above, in this embodiment, temperature compensation is performed for the -28 dB transmission power reduction amount, which is significant at low temperatures of about -34°C.
Transmission power reduction operation can be performed satisfactorily even under conditions of 34° C. to +60° C./95° C.

以上、この発明を一実施例に基づいて説明した。The present invention has been described above based on one embodiment.

この実施例では−28dBの送信電力低減量の場合に温
度補償を行な5構成であったが、他の送信電力低減量の
場合にも同様に適用可能である。また、複数の送信電力
低減量に対応させて温度補償を行なうことも可能である
In this embodiment, temperature compensation is performed in the case of a transmission power reduction amount of -28 dB, and five configurations are used, but it is similarly applicable to cases of other transmission power reduction amounts. Furthermore, it is also possible to perform temperature compensation in correspondence with a plurality of transmission power reduction amounts.

(発明の効果) 以上説明したように、この発明によれば、複数段階の送
信電力量のすべてに温度補償を行なうのではなく所望の
段階の送信電力量にのみ選択的に温度補償を行なう構成
としたため、温度補償が必要な送信電力を容易かつ好適
に温度補償することができる。特に、送信電力量が極め
て小さい場合に温度補償を行なうこととすれば、広範囲
な温度条件下においても、送信電力を安定に保つという
効果が得られる。この発明は、自動車電話装置等に適用
して好適である。
(Effects of the Invention) As explained above, according to the present invention, the configuration is such that temperature compensation is not performed for all of the transmission power amounts at multiple stages, but selectively for the transmission power amounts at a desired stage. Therefore, transmission power that requires temperature compensation can be easily and suitably temperature compensated. In particular, if temperature compensation is performed when the amount of transmitted power is extremely small, it is possible to maintain the transmitted power stably even under a wide range of temperature conditions. The present invention is suitable for application to car telephone devices and the like.

【図面の簡単な説明】[Brief explanation of drawings]

第1図はこの発明の一実施例を示すブロック図、第2図
は従来の送信電力回路の構成例を示すブロック図、及び
第3図は第1図に示す実施例に用いられる温度補償回路
の温度と温度補償電圧との関係を示す図である。 1・・・高周波電力入力端子、2・・・電力増幅モジュ
ール、3・・・アイソレータ、4・・・高周波電力出力
端子、5・・・検波回路、6,768.13.14・・
・抵抗ネットワーク、9・・・ICスイッチ、10.1
5・・・温度補償回路、11・・・比較回路、12・・
・論理レベル入力端子、16・・・電源端子、17・・
・直流増幅器。 特許出願人 沖電気工業株式会社 特許出願代理人 弁理士 山 本 恵 −秦lI2] 幕2rgJ −40士2北 ゛ す’?’cc)。 5呂演
FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a block diagram showing an example of the configuration of a conventional transmission power circuit, and FIG. 3 is a temperature compensation circuit used in the embodiment shown in FIG. FIG. 3 is a diagram showing the relationship between temperature and temperature compensation voltage. DESCRIPTION OF SYMBOLS 1... High frequency power input terminal, 2... Power amplification module, 3... Isolator, 4... High frequency power output terminal, 5... Detection circuit, 6,768.13.14...
・Resistance network, 9...IC switch, 10.1
5... Temperature compensation circuit, 11... Comparison circuit, 12...
・Logic level input terminal, 16... Power supply terminal, 17...
・DC amplifier. Patent Applicant Oki Electric Industry Co., Ltd. Patent Application Agent Patent Attorney Megumi Yamamoto - Hata II2] Maku2rgJ -40ushi2north? 'cc). 5ro performances

Claims (1)

【特許請求の範囲】[Claims] 高周波信号を増幅する電力増幅部と、この出力を検波す
る検波回路と、該検波回路の出力を分圧して複数段階の
送信電力量に対応する複数の電圧を出力する電圧分割回
路と、該電圧分割回路からの複数の電圧を切換えてこの
うちの1つを電力増幅部に出力する切換え回路とを有す
る電力増幅回路において、前記複数の送信電力量のうち
温度補償をすべき送信電力量に対応する前記検波回路か
らの電圧に、前記検波回路の温度特性に対応する温度補
償を与える温度補償回路を設けたことを特徴とする電力
増幅回路。
a power amplification section that amplifies a high-frequency signal; a detection circuit that detects the output; a voltage divider circuit that divides the output of the detection circuit and outputs a plurality of voltages corresponding to multiple levels of transmission power; In a power amplifier circuit having a switching circuit that switches a plurality of voltages from a dividing circuit and outputs one of the voltages to a power amplifier section, the power amplifier circuit corresponds to a transmission power amount that should be temperature compensated among the plurality of transmission power amounts. 1. A power amplifier circuit comprising: a temperature compensation circuit that provides temperature compensation to the voltage from the detection circuit corresponding to the temperature characteristics of the detection circuit.
JP3158685A 1985-02-21 1985-02-21 Power amplifier circuit Pending JPS61193524A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3158685A JPS61193524A (en) 1985-02-21 1985-02-21 Power amplifier circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3158685A JPS61193524A (en) 1985-02-21 1985-02-21 Power amplifier circuit

Publications (1)

Publication Number Publication Date
JPS61193524A true JPS61193524A (en) 1986-08-28

Family

ID=12335293

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3158685A Pending JPS61193524A (en) 1985-02-21 1985-02-21 Power amplifier circuit

Country Status (1)

Country Link
JP (1) JPS61193524A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6436124A (en) * 1987-07-31 1989-02-07 Oki Electric Ind Co Ltd Transmission power control circuit in radio transmitter
FR2759219A1 (en) * 1997-01-31 1998-08-07 Samsung Electronics Co Ltd METHOD FOR CONTROLLING THE POWER OF A RADIO SIGNAL BASED ON FREQUENCY AND TEMPERATURE VARIATIONS IN A PERSON SEARCH TRANSMITTER

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6436124A (en) * 1987-07-31 1989-02-07 Oki Electric Ind Co Ltd Transmission power control circuit in radio transmitter
FR2759219A1 (en) * 1997-01-31 1998-08-07 Samsung Electronics Co Ltd METHOD FOR CONTROLLING THE POWER OF A RADIO SIGNAL BASED ON FREQUENCY AND TEMPERATURE VARIATIONS IN A PERSON SEARCH TRANSMITTER

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