JP2901166B2 - Temperature compensation circuit of distortion compensation multi-frequency common amplifier - Google Patents
Temperature compensation circuit of distortion compensation multi-frequency common amplifierInfo
- Publication number
- JP2901166B2 JP2901166B2 JP4069935A JP6993592A JP2901166B2 JP 2901166 B2 JP2901166 B2 JP 2901166B2 JP 4069935 A JP4069935 A JP 4069935A JP 6993592 A JP6993592 A JP 6993592A JP 2901166 B2 JP2901166 B2 JP 2901166B2
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- JP
- Japan
- Prior art keywords
- amplifier
- temperature
- distortion
- frequency
- error
- 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)
Description
【０００１】[0001]
【産業上の利用分野】本発明は自動車電話システム等に
おける無線中継装置の多周波共通増幅器に用いられ、特
に相互変調歪補償形多周波共通増幅器の温度補償回路に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for a multi-frequency common amplifier of a wireless relay device in a car telephone system or the like, and more particularly to a temperature compensation circuit of an intermodulation distortion compensation type multi-frequency common amplifier.
【０００２】[0002]
【従来の技術】８００ＭＨｚ帯の自動車電話システム等
における無線中継装置には、多周波信号を同時に増幅す
る多周波共通増幅器が設けられている。この多周波共通
増幅器は相互変調歪を極力小さくするため直線性を十分
良くする必要があり小形で高直線性を得るための回路が
用いられている。このような回路として非線形歪補償回
路があるが、周囲温度の変動により直線性が劣化してし
まう欠点があった。このための改善策として、その一つ
のプレディストーション非線形歪補償回路は、３次の相
互変調歪を補償する増幅器であり、電源投入時または装
置内の温度が変化した時、入力信号を帯域内で互いに周
波数の異なる２波のパイロット信号に切替えて増幅し、
この２波のパイロット信号による３次歪成分を検出して
この３次歪成分を相殺するように増幅器の移相量と減衰
度（増幅度）を制御した後、再び入力信号側に切替えて
多周波入力信号を増幅するように構成されている（ＩＥ
ＥＥ Ｔｒａｎｓ．Ｖｅｈ．Ｔｅｃｈｎｏｌ．，ｖｏ
ｌ．ＶＴ−３４，Ｎo.４，ｐｐ．１６９−１７７，Ｎｏ
ｖ．１９８５参照）。2. Description of the Related Art A multi-frequency common amplifier for simultaneously amplifying multi-frequency signals is provided in a wireless relay device in an 800 MHz band automobile telephone system or the like. In this multi-frequency common amplifier, it is necessary to sufficiently improve linearity in order to minimize intermodulation distortion, and a small-sized circuit for obtaining high linearity is used. As such a circuit, there is a nonlinear distortion compensating circuit, but there is a disadvantage that the linearity is deteriorated due to a change in the ambient temperature. As a remedy for this, one of the pre-distortion nonlinear distortion compensation circuits is an amplifier that compensates for the third-order intermodulation distortion. Amplify by switching to two pilot signals with different frequencies,
After detecting the third-order distortion component due to the two-wave pilot signal and controlling the phase shift amount and attenuation (amplification) of the amplifier so as to cancel the third-order distortion component, the input signal is switched again to the input signal side. Is configured to amplify the frequency input signal (IE
EE Trans. Veh. Technol. , Vo
l. VT-34, No. 4, pp. 169-177, No
v. 1985).
【０００３】他の一つは、自己調整形フィードフォワー
ド増幅器（ＳＡＦＦ−Ａ：Ｓｅｌｆ−Ａｄｊｕｓｔｉｎ
ｇ Ｆｅｅｄ−Ｆｏｒｗａｒｄ Ａｍｐｌｉｆｉｅｒ）
といわれ、すべての相互変調歪と雑音を自己調整によっ
て補償する増幅器である。この回路は誤差検出ループと
誤差除去ループとから構成され、被補償増幅器である主
増幅器を含む誤差検出ループで入力信号以外の歪成分を
検出し、検出された歪成分（誤差成分）を補助増幅器
（誤差増幅器）を含む誤差除去ループに入力して誤差成
分を増幅した後、逆相で多周波入力信号と合成して誤差
成分の相殺を図るように構成されており、全てパイロッ
ト信号による検出が最小となるようパイロット送信機と
受信機を具備している（信学技報，ｖｏｌ．９０，Ｎ
ｏ．５７，ＲＣＳ９０−４）。Another is a self-adjustable feedforward amplifier (SAFF-A: Self-Adjustin).
g Feed-Forward Amplifier)
It is an amplifier that compensates for all intermodulation distortion and noise by self-adjustment. This circuit includes an error detection loop and an error elimination loop, detects a distortion component other than the input signal in an error detection loop including a main amplifier which is a compensated amplifier, and converts the detected distortion component (error component) to an auxiliary amplifier. (Amplifier), which is configured to amplify the error component and combine it with the multi-frequency input signal in the opposite phase to cancel the error component. A pilot transmitter and a receiver are provided so as to be minimized (IEICE Technical Report, vol. 90, N.
o. 57, RCS90-4).
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、前述の
前者のプレディストーション形の場合は、温度が変化す
る度に校正用パイロット信号を切替え入力するため、そ
の間の通信サービスが中断されるという問題点がある。
また、後者の自己調整形フィードフォワードの場合は、
温度特性を良くするためには回路が複雑になるという問
題点がある。さらに、通信システムの不感地対策として
無線中継装置が増設され、数が増えるとともに上り回
線，下り回線の各共通増幅器が実装されると、前述の問
題点が強調されて実用上の欠点となる。However, in the case of the former predistortion type, the calibration pilot signal is switched and input every time the temperature changes, so that the communication service during that period is interrupted. is there.
In the case of the latter self-adjustment type feed forward,
There is a problem that a circuit becomes complicated to improve the temperature characteristics. Further, as the number of wireless relay devices is increased as a countermeasure against blind spots in the communication system and the number thereof is increased, and the common amplifiers of the uplink and the downlink are mounted, the above-mentioned problems are emphasized and become practical disadvantages.
【０００５】本発明の目的は、これらの問題点をなく
し、通信サービスが中断されることなく、しかも、周囲
温度が変化しても歪補償動作を安定に行わしめることの
できる歪補償多周波共通増幅器の温度補償回路を提供す
ることにある。SUMMARY OF THE INVENTION An object of the present invention is to eliminate these problems, to provide a distortion compensation multi-frequency common operation capable of stably performing a distortion compensation operation even when the ambient temperature changes without interrupting communication services. It is to provide a temperature compensation circuit of an amplifier.
【０００６】[0006]
【課題を解決するための手段】本発明の歪補償多周波共
通増幅器の温度補償回路は、多周波入力信号を増幅する
主増幅器で発生する相互変調歪成分を検出しその歪成分
を誤差増幅器で増幅した後、逆相にして前記入力信号と
合成出力する歪補償多周波共通増幅器の前記主増幅器お
よび前記誤差増幅器の近傍にそれぞれ配置された第１お
よび第２の温度センサと、前記主増幅器および前記誤差
増幅器のそれぞれに付加された可変減衰器，可変移相器
の所定の温度範囲内の各温度に対応して前記相互変調歪
が最小となる減衰量，移相量が予め書き込まれたメモリ
と、前記第１および第２の温度センサの検出温度をディ
ジタル変換した値によって前記メモリからそれぞれ該検
出温度に対応する減衰量，移相量を読み出してそれぞれ
前記可変減衰器，可変移相器の減衰量，移相量を設定制
御するＣＰＵとを備えたことを特徴とするものである。SUMMARY OF THE INVENTION A temperature compensation circuit of a distortion-compensating multi-frequency common amplifier according to the present invention detects an intermodulation distortion component generated in a main amplifier for amplifying a multi-frequency input signal, and converts the distortion component with an error amplifier. after amplification, the first and second temperature sensor disposed respectively in the vicinity of said main amplifying unit Contact <br/> spare the error amplifier in the distortion compensation multifrequency common amplifier for combining the output with the input signal in the opposite phase A variable attenuator and a variable phase shifter added to each of the main amplifier and the error amplifier, and an attenuation amount and a phase shift amount at which the intermodulation distortion is minimized corresponding to each temperature within a predetermined temperature range. Are read in advance from the memory and the values of the detected temperatures of the first and second temperature sensors which are digitally converted to read out the attenuation amount and phase shift amount corresponding to the detected temperature, respectively, and read out the variable attenuation values respectively. And it is characterized in that a CPU for setting control attenuation, phase shift of the variable phase shifter.
【０００７】[0007]
【０００８】[0008]
【実施例】図１は本発明の実施例を示すブロック図であ
る。図１の上半分はフィードフォワード共通増幅器（フ
ィードフォワード回路）であり、下半分は本発明の温度
補償回路である。まず、フィードフォワード回路につい
て説明する。FIG. 1 is a block diagram showing an embodiment of the present invention. The upper half of FIG. 1 is a feedforward common amplifier (feedforward circuit), and the lower half is a temperature compensation circuit of the present invention. First, the feedforward circuit will be described.
【０００９】前述のようにフィードフォワード回路は、
誤差検出ループと誤差除去ループとから構成され、図１
の分配器２１から分配合成器２５までが誤差検出ループ
に相当し、分配合成器２５から合成器２９までが誤差除
去ループに相当する。分配器２１に入力される多周波信
号（ＩＮ）は、レベル調整用可変減衰器２２，可変移相
器２３を通って被補償増幅器である主増幅器２４で増幅
され合成分配器２５に入力される。一方、入力多周波信
号（ＩＮ）は遅延線３０により主増幅器２４から出力さ
れる信号とタイミングが等しくなるように遅延されて合
成分配器２５に入力される。合成分配器２５は、入力さ
れる２つの信号から主増幅器２４が発生する誤差成分
（相互変調歪成分と雑音成分）ａを検出して出力する。
分配合成器２５から出力される誤差成分ａは、レベル調
整用可変減衰器２６，可変移相器２７を通って誤差増幅
器２８で増幅されて合成器２９に入力される。一方、主
増幅器２４で増幅され、誤差を含んだ信号が分配合成器
２５から出力され、遅延線３１を介して誤差増幅器２８
から出力される信号とタイミングが等しくなるように遅
延されて合成器２９に入力される。合成器２９は、誤差
増幅器２８から入力される誤差成分を逆相にして遅延線
３１から入力される信号と合成することにより、誤差成
分が相殺された多周波増幅信号を出力（ＯＵＴ）する。As mentioned above, the feedforward circuit
It is composed of an error detection loop and an error removal loop.
From the distributor 21 to the distributor / synthesizer 25 correspond to an error detection loop, and from the distributor / synthesizer 25 to the synthesizer 29 corresponds to an error removal loop. The multi-frequency signal (IN) input to the splitter 21 passes through a variable attenuator 22 for level adjustment and a variable phase shifter 23, is amplified by a main amplifier 24 as a compensated amplifier, and is input to a combiner / distributor 25. . On the other hand, the input multi-frequency signal (IN) is delayed by the delay line 30 so that the timing is equal to that of the signal output from the main amplifier 24, and is input to the combiner / distributor 25. The combiner / divider 25 detects an error component (intermodulation distortion component and noise component) a generated by the main amplifier 24 from the two input signals and outputs the error component.
The error component a output from the divider / combiner 25 passes through a variable attenuator 26 for level adjustment and a variable phase shifter 27, is amplified by an error amplifier 28, and is input to a combiner 29. On the other hand, a signal amplified by the main amplifier 24 and containing an error is output from the distribution / synthesizer 25, and is output via the delay line 31 to the error amplifier 28.
Are input to the synthesizer 29 after being delayed so as to have the same timing as the signal output from. The combiner 29 outputs the multi-frequency amplified signal from which the error component has been canceled by making the error component input from the error amplifier 28 out of phase and synthesizing the signal with the signal input from the delay line 31.
【００１０】上記の歪補償共通増幅器の温度特性を補償
するために、図１の下半分の本発明による温度補償回路
が付加される。歪補償共通増幅器の温度特性は、主増幅
器２４と誤差増幅器２８に支配されるため、温度センサ
１と２をそれぞれ主増幅器２４と誤差増幅器２８の近傍
に配置する。温度センサ１，２で検知される温度情報
は、Ａ／Ｄ変換器３，４でそれぞれディジタルデータに
変換されて中央処理装置（ＣＰＵ）５に与えられる。６
は不揮発性メモリ（Ｅ2 ＰＭＯＭ）であり、想定される
中継装置の使用温度範囲の各温度に対して、歪補償共通
増幅器の歪が最小になる可変減衰器２２，可変移相器２
３及び可変減衰器２６，可変移相器２７の各値が予め書
き込まれている。この不揮発性メモリ６へのデータの書
き込みは次のようにして行われる。装置の最終出荷試験
時に、歪補償回路に多周波信号を入力（ＩＮ）し、出力
信号（ＯＵＴ）の歪が最小値となるように可変減衰器２
２，２６及び可変移相器２３，２７を調整し、その値が
Ｄ／Ａ変換器８，９，１０，１１からそれぞれ与えられ
るようなディジタル値とその時の温度をインタフェース
（Ｉ／Ｏ）１２を介して外部から不揮発性メモリ６に書
き込む。これを、装置の使用温度範囲の各温度について
行って書き込む。上記の書き込み作業は、所定の温度範
囲の上限，下限，室温及び特異点があればその点につい
て行い、電源投入後はメモリ６の内容をメモリ７に移す
とともにその中間温度に対しては上記測定温度における
それぞれの値をＣＰＵ５で推定して補助用のメモリ（Ｒ
ＯＭ）７に書き込む。In order to compensate for the temperature characteristic of the distortion compensation common amplifier, a temperature compensation circuit according to the present invention in the lower half of FIG. 1 is added. Since the temperature characteristic of the distortion compensation common amplifier is governed by the main amplifier 24 and the error amplifier 28, the temperature sensors 1 and 2 are arranged near the main amplifier 24 and the error amplifier 28, respectively. The temperature information detected by the temperature sensors 1 and 2 is converted into digital data by A / D converters 3 and 4, respectively, and given to a central processing unit (CPU) 5. 6
Is a non-volatile memory (E 2 PMOM), and a variable attenuator 22 and a variable phase shifter 2 that minimize the distortion of the distortion compensation common amplifier for each temperature in an assumed operating temperature range of the relay device.
3, and the values of the variable attenuator 26 and the variable phase shifter 27 are written in advance. The writing of data to the nonvolatile memory 6 is performed as follows. At the time of the final shipping test of the device, the multi-frequency signal is input (IN) to the distortion compensation circuit, and the variable attenuator 2 is set so that the distortion of the output signal (OUT) becomes the minimum value.
2 and 26 and the variable phase shifters 23 and 27 are adjusted, and the digital value and the temperature at that time are given from the D / A converters 8, 9, 10 and 11, respectively, to the interface (I / O) 12 Is written to the non-volatile memory 6 from the outside via the. This is performed and written for each temperature in the operating temperature range of the device. The above-mentioned writing operation is performed on the upper and lower limits of the predetermined temperature range, the room temperature, and the singular point, if any. Each value at the temperature is estimated by the CPU 5 and an auxiliary memory (R
OM) 7.
【００１１】以上のような構成により、ＣＰＵ５は、温
度センサ１，２によって検出された温度に対応して可変
減衰器２２，２６及び可変移相器２３，２７のその温度
における最適値をメモリ７から読み出して設定するよう
に制御を行う。With the above configuration, the CPU 5 stores the optimum values of the variable attenuators 22 and 26 and the variable phase shifters 23 and 27 at the temperatures corresponding to the temperatures detected by the temperature sensors 1 and 2 in the memory 7. Is controlled so as to be set by reading from the.
【００１２】図１の本発明の第１の実施例では、フィー
ドフォワード共通増幅器への適用を示したが、プレディ
ストーション形共通増幅器にも適用できることはいうま
でもない。また、図１におけるＣＰＵ５やメモリ６，７
は安価であり、中継増幅器にはＣＰＵ，メモリ類が用い
られており、それらの一部を共用することができるため
装置の価格に及ぼす影響は微々たるものである。In the first embodiment of the present invention shown in FIG. 1, the present invention is applied to a feedforward common amplifier. However, it goes without saying that the present invention can be applied to a predistortion common amplifier. Further, the CPU 5 and the memories 6 and 7 in FIG.
Are inexpensive, and a CPU and a memory are used for the relay amplifier, and a part of them can be shared, so that the influence on the price of the device is insignificant.
【００１３】[0013]
【発明の効果】以上詳細に説明したように、本発明を実
施することにより、通信サービスを中断することなく、
周囲温度の変化に対して極めて安定な歪補償多周波共通
増幅器を実現することができるため、実用上の効果は極
めて大きい。As described in detail above, by implementing the present invention, without interrupting the communication service,
Since a distortion-compensating multi-frequency common amplifier that is extremely stable against changes in the ambient temperature can be realized, the practical effect is extremely large.
【図１】本発明の実施例を示すブロック図である。FIG. 1 is a block diagram showing an embodiment of the present invention.
１，２ 温度センサ ３，４ Ａ／Ｄ変換器 ５ ＣＰＵ ６，７ メモリ ８，９，１０，１１ Ｄ／Ａ変換器 １２ インタフェース ２１ 分配器 ２２，２６ 可変減衰器 ２３，２７ 可変移相器 ２４ 主増幅器 ２５ 分配合成器 ２８ 誤差増幅器 ２９ 合成器 ３０，３１ 遅延線 1, 2 Temperature sensor 3, 4 A / D converter 5 CPU 6, 7 Memory 8, 9, 10, 11 D / A converter 12 Interface 21 Distributor 22, 26 Variable attenuator 23, 27 Variable phase shifter 24 Main amplifier 25 Distribution synthesizer 28 Error amplifier 29 Synthesizer 30, 31 Delay line
───────────────────────────────────────────────────── フロントページの続き (72)発明者 野口 浩 東京都港区虎ノ門二丁目３番13号 国際 電気株式会社内 (72)発明者 横手 隆司 東京都港区虎ノ門二丁目３番13号 国際 電気株式会社内 (56)参考文献 特開 平１−154628（ＪＰ，Ａ) 実開 平２−60316（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.6，ＤＢ名) H03F 1/30 H03F 1/32 H03G 3/20 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroshi Noguchi 2-3-13 Toranomon, Minato-ku, Tokyo Inside Kokusai Denki Co., Ltd. (72) Inventor Takashi Yokote 2-3-1 Toranomon, Minato-ku, Tokyo Kokusai Electric (56) References JP-A-1-154628 (JP, A) JP-A-2-60316 (JP, U) (58) Fields investigated (Int. Cl. 6 , DB name) H03F 1/30 H03F 1/32 H03G 3/20
Claims (1)
生する相互変調歪成分を検出しその歪成分を誤差増幅器
で増幅した後、逆相にして前記入力信号と合成出力する
歪補償多周波共通増幅器の前記主増幅器および前記誤差
増幅器の近傍にそれぞれ配置された第１および第２の温
度センサと、 前記主増幅器および前記誤差増幅器のそれぞれに付加さ
れた可変減衰器，可変移相器の所定の温度範囲内の各温
度に対応して前記相互変調歪が最小となる減衰量，移相
量が予め書き込まれたメモリと、 前記第１および第２の温度センサの検出温度をディジタ
ル変換した値によって前記メモリからそれぞれ該検出温
度に対応する減衰量，移相量を読み出してそれぞれ前記
可変減衰器，可変移相器の減衰量，移相量を設定制御す
るＣＰＵとを備えた歪補償多周波共通増幅器の温度補償
回路。1. A distortion-compensated multi-frequency device that detects an intermodulation distortion component generated by a main amplifier that amplifies a multi-frequency input signal, amplifies the distortion component by an error amplifier, and then reverse-phases the combined output with the input signal. first and second temperature sensor disposed respectively in the vicinity of said main amplifying device and said error amplifier common amplifier, the main amplifier and a variable attenuator is added to each of the error amplifier, a variable phase shifter A memory in which an attenuation amount and a phase shift amount in which the intermodulation distortion is minimized corresponding to each temperature within a predetermined temperature range is written in advance, and the detection temperatures of the first and second temperature sensors are digitally converted. A distortion compensator comprising a variable attenuator and a CPU for setting and controlling the variable attenuator and the variable phase shifter, respectively, by reading out the attenuation amount and the phase shift amount corresponding to the detected temperature from the memory according to the values. Temperature compensation circuit of frequency common amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4069935A JP2901166B2 (en) | 1992-02-21 | 1992-02-21 | Temperature compensation circuit of distortion compensation multi-frequency common amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4069935A JP2901166B2 (en) | 1992-02-21 | 1992-02-21 | Temperature compensation circuit of distortion compensation multi-frequency common amplifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05235671A JPH05235671A (en) | 1993-09-10 |
| JP2901166B2 true JP2901166B2 (en) | 1999-06-07 |
Family
ID=13417022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4069935A Expired - Lifetime JP2901166B2 (en) | 1992-02-21 | 1992-02-21 | Temperature compensation circuit of distortion compensation multi-frequency common amplifier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2901166B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5498657A (en) * | 1993-08-27 | 1996-03-12 | Asahi Glass Company Ltd. | Fluorine-containing polymer composition |
| JPH07212166A (en) * | 1994-01-10 | 1995-08-11 | Nippon Koshuha Kk | Amplitude and phase control circuit |
| JP2792533B2 (en) * | 1995-05-02 | 1998-09-03 | 日本電気株式会社 | Feedforward amplifier |
| JP2000004124A (en) * | 1998-06-17 | 2000-01-07 | Nec Corp | Feedforward amplifier |
-
1992
- 1992-02-21 JP JP4069935A patent/JP2901166B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05235671A (en) | 1993-09-10 |
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