JPH04100426A - Transmitting output control circuit - Google Patents
Transmitting output control circuitInfo
- Publication number
- JPH04100426A JPH04100426A JP21921590A JP21921590A JPH04100426A JP H04100426 A JPH04100426 A JP H04100426A JP 21921590 A JP21921590 A JP 21921590A JP 21921590 A JP21921590 A JP 21921590A JP H04100426 A JPH04100426 A JP H04100426A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- control
- output
- attenuating
- attenuation
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims abstract description 26
- 230000005540 biological transmission Effects 0.000 claims description 42
- 230000003321 amplification Effects 0.000 claims description 7
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 description 5
- 230000007423 decrease Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
Landscapes
- Control Of Amplification And Gain Control (AREA)
- Time-Division Multiplex Systems (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、主にＴＤＭＡ無線送信機において、バースト
状の送信波の出力レベル、及び出力の立上り立下り特性
を広いダイナミックレンジに渡って制御する送信出力ｌ
ｌ７ａｙ回路に関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is mainly used in TDMA radio transmitters to control the output level of burst-shaped transmission waves and the rise and fall characteristics of the output over a wide dynamic range. Output l
Regarding the l7ay circuit.
従来の技術
従来、この種の送信出力制御回路は第３図に示すような
、いわゆる自動電力料？Ｉ（ＡＰＣ）回路があり、送信
出力を電′ａ！圧、人力、温度等の諸条件の変動に対し
て一定に保つ役割りをしている。BACKGROUND OF THE INVENTION Conventionally, this type of transmission output control circuit has been used for so-called automatic power consumption control circuits as shown in Fig. 3. There is an I (APC) circuit, and the transmission output is converted to electric 'a! Its role is to maintain a constant level against fluctuations in various conditions such as pressure, human power, and temperature.
第３図において、ｌは送信■ＣＯ１２は送信電力増幅回
路、３は方向性結合器、４はダイオードを使用した検波
回路、５は比較誤差アンプである。In FIG. 3, 1 is a transmission power amplifier circuit, 3 is a directional coupler, 4 is a detection circuit using a diode, and 5 is a comparison error amplifier.
送信ＶＣＯＩからの出力は送信電力増幅回路２で電力増
幅され、方向性結合器３を介して送信される。方向性結
合器３は送信電力増幅回路２の出力を一部分岐して検波
回路４に供給し、その検波出力を比較誤差アンプ５に人
力する。比較誤差アンプ５では、この検波出力と基準波
形１３ （Ｖｒｅｆ）とを比較し、その比較結果に応し
て送信電力増幅回路２に制御電圧Ｖ Ａｒｃを与え増幅
度を制御する。The output from the transmission VCOI is power amplified by a transmission power amplification circuit 2 and transmitted via a directional coupler 3. The directional coupler 3 branches part of the output of the transmission power amplification circuit 2 and supplies it to the detection circuit 4 , and supplies the detection output to the comparison error amplifier 5 . The comparison error amplifier 5 compares this detection output with the reference waveform 13 (Vref), and applies a control voltage V Arc to the transmission power amplifier circuit 2 in accordance with the comparison result to control the amplification degree.
こうして送信出力制御負帰還ループが構成されている。In this way, a transmission output control negative feedback loop is constructed.
送信出力レベルは通常、離散的な値をとり、最大最小の
レベル差は高々２０数ｄＢであるから、般に良く知られ
ているダイオードを用いた簡単な検波回路で、はぼその
目的を達成できる。The transmission output level usually takes discrete values, and the difference between maximum and minimum levels is at most 20 dB, so a simple detection circuit using a well-known diode can achieve the basic purpose. can.
発明が解決しようとする課題
しかしながら、今後一般に広く普及してゆくであろう狭
帯域ＴＤＭＡ無線通信では、送信波はバースト状である
から、隣接チャンネルへのスペクトラムの拡がりを抑え
る為には、送信波の立上り、立下り特性を正確に制御し
なくてはならない。Problems to be Solved by the Invention However, in narrowband TDMA wireless communication, which is expected to become widespread in the future, the transmitted waves are burst-like, so in order to suppress the spread of the spectrum to adjacent channels, it is necessary to It is necessary to accurately control the rise and fall characteristics of the
−例として、ディジタルセルラー電話の欧州統一規格で
ある０３Ｍ規格では、立上り立下り応答時間特性を、出
力下限−３６ｄＢｍまたはピーク値とのレベル相対比−
７０ｄＢｃのポイント及び−３０ｄＢｃのポイントと、
ピーク値に達する時間とを規定している。- For example, in the 03M standard, which is the unified European standard for digital cellular telephones, the rise and fall response time characteristics are defined as the level relative ratio with the output lower limit of -36 dBm or the peak value -
a point of 70 dBc and a point of -30 dBc,
The time required to reach the peak value is specified.
ところが前述したように一般的な検波回路はダイオード
の検波特性を応用したものであるから本質的にダイナミ
ックレンジが狭く、多少の工夫をしても２０数ｄＢにし
かならず、制御可能な送信出力レンジがはるかに不足す
る。However, as mentioned above, since general detection circuits apply the detection characteristics of diodes, their dynamic range is essentially narrow, and even with some effort, the dynamic range is only about 20 dB, and the controllable transmission output range is limited. much less.
本発明はこのような従来の課題を解決するもので、検波
回路のダイナミックレンジの不足を補い、送信出力を広
いダイナミックレンジにわたって再現性よく制御するこ
とを目的とするものである。The present invention is intended to solve these conventional problems, and aims to compensate for the lack of dynamic range of a detection circuit and control transmission output with good reproducibility over a wide dynamic range.
課題を解決するための手段
上記目的を達成するために、本発明は送信電力増幅回路
の出力の一部を分離する方向性結合器と、分離した出力
を減衰させる可変減衰器と、この可変減衰器の出力を検
波する検波回路と、この検波回路の出力と基準値との比
較結果に応じて送信電力増幅回路の増幅度を制御する手
段とを有するものである。Means for Solving the Problems In order to achieve the above objects, the present invention provides a directional coupler that separates a part of the output of a transmission power amplifier circuit, a variable attenuator that attenuates the separated output, and a variable attenuator that attenuates the separated output. The transmitter has a detection circuit for detecting the output of the detector, and means for controlling the amplification degree of the transmission power amplifier circuit in accordance with a comparison result between the output of the detection circuit and a reference value.
作用
上記構成の作用は次のようになる。送信電力増幅回路か
ら出力された送信出力の一部が方向性結合器によって取
り出され可変減衰回路を通って検波回路で検出される。Effect The effect of the above configuration is as follows. A part of the transmission power output from the transmission power amplifier circuit is taken out by the directional coupler, passes through a variable attenuation circuit, and is detected by a detection circuit.
可変減衰回路での減衰量が増すと、検出値が減少して見
かけ上送信出力が低下したようになる為、負帰還ループ
によって送信出力を増大するように動く、従って本発明
によれば、検波回路のダイナミックレンジの拡大に頼ら
なくても、可変減衰器による制御と組合わせることによ
って送信出力を広いダイナミックレンジにわたって再現
性良く制御できる。When the amount of attenuation in the variable attenuation circuit increases, the detected value decreases and the transmission output appears to decrease, so the negative feedback loop operates to increase the transmission output.Therefore, according to the present invention, the detection By combining this with control by a variable attenuator, the transmission output can be controlled with good reproducibility over a wide dynamic range without relying on expanding the dynamic range of the circuit.
寞施例
第１図は本発明の一実施例の構成を示す０図中第３回と
同一部分には同一符号を付して説明を省略する。６は可
変減衰回路で、方向性結合器３で取り出した送信出力を
減衰させて検波回路４へ供給する。可変減衰回路６には
制御線が接続されていて、瞬時に任意の減衰量が得られ
るようになっている。この可変減衰回路６の制御線では
、主に出力レベルの切換え制御を行なう。First Embodiment FIG. 1 shows the configuration of an embodiment of the present invention. In FIG. A variable attenuation circuit 6 attenuates the transmission output taken out by the directional coupler 3 and supplies it to the detection circuit 4. A control line is connected to the variable attenuation circuit 6, so that any desired amount of attenuation can be instantaneously obtained. The control line of this variable attenuation circuit 6 mainly performs output level switching control.
前述の０３Ｍ規格を例にとると、送信出力は４３ｄＢ−
〜１３ｄＢ−で２ｄＢステツプで１６段階に分かれてい
る。またバースト波形のタイムマスクは、相対値で規定
され３０ｄＢ以上の制御が必要となる。最小出力レベル
の場合、１７ｄＢ−から制御するので、実に６０ｄＢの
制御範囲となる。バースト波形の制御に必要なダイナミ
ックレンジは、検波回路にもたせ、２ｄＢステツプの精
度の高い送信レベルの制御は可変減衰器が受持つ、この
為には可変減衰器の構成を２’ｄＢ（Ｎ＝１．２．３．
４）の減衰器の継続接続とするのが一つの手段である。Taking the 03M standard mentioned above as an example, the transmission output is 43dB-
It is divided into 16 stages in 2 dB steps at ~13 dB-. Further, the time mask of the burst waveform is defined by a relative value and requires control of 30 dB or more. In the case of the minimum output level, control starts from 17 dB, so the control range is actually 60 dB. The dynamic range required to control the burst waveform is provided by the detection circuit, and the variable attenuator is responsible for controlling the transmission level with high precision in 2 dB steps. 1.2.3.
One method is to continuously connect the attenuator in step 4).
なぜなら、送信出力レベルのデータが４ピントパラレル
であればそのまま制御線で取り込めるので構成が簡単で
精度が高い、この構成例を第２図に示す、可変減衰回路
６は２ｄＢ減衰部６１．４ｄＢ減衰部６２．８ｄＢ減衰
部６３およびｘ６ｄＢ減衰部６４から成っており、送信
出力レベル４ビツトデータＤ１．Ｄ２．Ｄ３．Ｄ４によ
り２ｄＢステツプで０〜３０ｄＢの１６段階での減衰量
制御が行われる。勿論、アナログ値で制御線を一本にし
ても良いが減衰量の精度がとれるよう配慮する必要があ
る。This is because if the transmission output level data is 4-pin parallel, it can be taken in as it is via the control line, so the configuration is simple and highly accurate.An example of this configuration is shown in Figure 2.The variable attenuation circuit 6 has a 2dB attenuation section and 61.4dB attenuation. section 62.8dB attenuation section 63 and x6dB attenuation section 64, and transmit output level 4-bit data D1. D2. D3. D4 performs attenuation control in 16 steps from 0 to 30 dB in 2 dB steps. Of course, it is possible to use a single control line using analog values, but care must be taken to ensure the accuracy of the attenuation amount.
本発明は上記のような構成で、ＴＤＭＡ送信出力制御を
可能とするものである。詳しく説明すると、前述したダ
イナミックレンジ７０ｄＢの出力ＩＩ ｍを、バースト
波形の制御と出力レベル制御とに分ける。バースト波形
の制御は、周波数スペクトラムの拡がりを防ぐ為のもの
で、検波回路４のダイナミックレンジを下限から上記迄
を全て使い切って制御する６通常３０〜４０ｄＢの検波
範囲で良い、この為、比較誤差アンプ５に入力する基準
波形８は、送信電力レベルに無関係で基本的には一定と
なる。The present invention enables TDMA transmission output control with the above configuration. To explain in detail, the aforementioned output II m with a dynamic range of 70 dB is divided into burst waveform control and output level control. Burst waveform control is to prevent the frequency spectrum from spreading, and is controlled by fully utilizing the dynamic range of the detection circuit 4 from the lower limit to the above 6. Normally, a detection range of 30 to 40 dB is sufficient; therefore, the comparison error The reference waveform 8 input to the amplifier 5 is basically constant regardless of the transmission power level.
次に送信電力レベルの制御は、送信開始前に決まってい
るので、その値に応じて可変減衰回路６の減衰量を設定
しておく、すなわち最大出力時には減衰量も最大で、出
力を例えば２ｄＢずつ減少させるには、減衰量も２ｄＢ
ずつ減らせば良い、つまり可変減衰回路６の変化幅は送
信出力の変化幅と一致する。一般に検波特性のバラツキ
よりも減衰特性のバラツキの方が管理しやすいので、出
力レベルの精度は高くなる。なお、可変減衰回路の具体
的構成法としては、インピーダンス特性やアイソレーシ
ッン特性を改善する為に線形増幅器を混在配置して精度
を高める工夫をするのも勿論良い。Next, since control of the transmission power level is determined before starting transmission, the amount of attenuation of the variable attenuation circuit 6 is set according to that value. To decrease the amount by 2 dB, the attenuation amount must also be 2 dB.
In other words, the range of change of the variable attenuation circuit 6 matches the range of change of the transmission output. In general, variations in attenuation characteristics are easier to manage than variations in detection characteristics, so the accuracy of the output level becomes higher. Note that as a specific method of configuring the variable attenuation circuit, it is of course a good idea to mix and arrange linear amplifiers to improve the accuracy in order to improve the impedance characteristics and isolating characteristics.
このように、上記実施例によれば、広い送信出力制御範
囲を、ディジタル的な制御の可能な可変減衰器と、実現
性の高いダイオード検波回路に各々分担するので、従来
の検波回路のグイナミノクレンジだけに依存する送信出
力制御回路に較べて、精度の高い、再現性に優れた出力
制御が可能になる。In this way, according to the above embodiment, the wide transmission output control range is divided between the digitally controllable variable attenuator and the diode detection circuit, which is highly practical. Compared to a transmission output control circuit that relies only on cleanliness, it is possible to perform output control with higher precision and excellent reproducibility.
発明の効果
本発明は上記実施例より明らかなように、送信出力制御
回路において検波回路の前に高周波可変減衰回路を設け
、送信出力レベルに応して減衰量を制御することにより
、従来の方法では得られなかった非常に広い出力レベル
範囲に渡って、送信出力レベル波形制御を可能とする効
果を有する。Effects of the Invention As is clear from the above embodiments, the present invention provides a high frequency variable attenuation circuit in front of the detection circuit in the transmission output control circuit, and controls the amount of attenuation according to the transmission output level, thereby improving the conventional method. This has the effect of making it possible to control the transmission output level waveform over a very wide output level range, which was not possible with the previous method.
また出力レベル設定の精度も高くなる効果を存する。ま
たバースト制御の立上り立下り基準波形は一つで済むこ
とは大きな利点で、機器の生産性向上に大いに寄与する
ことができる。It also has the effect of increasing the accuracy of output level setting. Furthermore, it is a great advantage that only one reference waveform for the rise and fall of burst control is required, and can greatly contribute to improving the productivity of equipment.
第１図は本発明による送信出力制御回路の実施例を示す
ブロック図、第２図は第１図における可変減衰器の構成
を示すブロック図、第３図は従来の送信出力制御回路の
ブロック図である。
１・・・・・・送信■ＣＯ１２・・・・・・送信電力増
幅回路、３・・・・・・方向性結合器、４・−・・・・
検波回路、５・・・・・・比較誤差アンプ、６・・・・
・・可変減衰回路、８・・・・・・基準波形（Ｖｒｅｆ
）。
代理人の氏名 弁理士 粟野重孝 はか１名第６図
第 ２ 図Fig. 1 is a block diagram showing an embodiment of the transmission output control circuit according to the present invention, Fig. 2 is a block diagram showing the configuration of the variable attenuator in Fig. 1, and Fig. 3 is a block diagram of a conventional transmission output control circuit. It is. 1... Transmission ■CO12... Transmission power amplifier circuit, 3... Directional coupler, 4...
Detection circuit, 5... Comparison error amplifier, 6...
...Variable attenuation circuit, 8...Reference waveform (Vref
). Name of agent: Patent attorney Shigetaka Awano (1 person) Figure 6 Figure 2
Claims (1)
増幅回路の出力の一部を分離する方向性結合器と、分離
した出力を減衰させる可変減衰器と、前記可変減衰器の
出力を検波する検波回路と、前記検波回路の出力と基準
値との比較結果に応じて前記送信電力増幅回路の増幅度
を制御する手段とを有する送信出力制御回路。A transmission power amplification circuit that amplifies transmission power, a directional coupler that separates a part of the output of the transmission power amplification circuit, a variable attenuator that attenuates the separated output, and a detection of the output of the variable attenuator. A transmission output control circuit comprising: a detection circuit; and means for controlling the amplification degree of the transmission power amplifier circuit according to a comparison result between the output of the detection circuit and a reference value.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2219215A JPH0771054B2 (en) | 1990-08-20 | 1990-08-20 | Transmission output control circuit |
| US07/740,966 US5214393A (en) | 1990-08-20 | 1991-08-06 | Transmission output control circuit |
| EP91307314A EP0472330B1 (en) | 1990-08-20 | 1991-08-08 | Transmission output control circuit |
| DE69113925T DE69113925T2 (en) | 1990-08-20 | 1991-08-08 | Circuit for regulating the transmission output level. |
| FI913935A FI104299B (en) | 1990-08-20 | 1991-08-20 | Transmission output control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2219215A JPH0771054B2 (en) | 1990-08-20 | 1990-08-20 | Transmission output control circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04100426A true JPH04100426A (en) | 1992-04-02 |
| JPH0771054B2 JPH0771054B2 (en) | 1995-07-31 |
Family
ID=16732009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2219215A Expired - Lifetime JPH0771054B2 (en) | 1990-08-20 | 1990-08-20 | Transmission output control circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0771054B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5376895A (en) * | 1991-11-29 | 1994-12-27 | Matsushita Electric Industrial Co., Ltd. | Control circuit and method for transmission output |
| US5459426A (en) * | 1993-09-30 | 1995-10-17 | Nec Corporation | Output level control circuit for setting transmission output to desired level |
| US6920334B1 (en) | 2000-03-24 | 2005-07-19 | International Business Machines Corporation | Method and apparatus for providing gain control feedback in RF amplifiers |
| JP2013519277A (en) * | 2010-02-04 | 2013-05-23 | エプコス アクチエンゲゼルシャフト | Amplifier circuit and method for signal sensing |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6173408A (en) * | 1984-09-19 | 1986-04-15 | Matsushita Electric Ind Co Ltd | Controlling method of transmitting output |
| JPS61158204A (en) * | 1984-12-29 | 1986-07-17 | Mitsubishi Electric Corp | Automatic power control circuit |
-
1990
- 1990-08-20 JP JP2219215A patent/JPH0771054B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6173408A (en) * | 1984-09-19 | 1986-04-15 | Matsushita Electric Ind Co Ltd | Controlling method of transmitting output |
| JPS61158204A (en) * | 1984-12-29 | 1986-07-17 | Mitsubishi Electric Corp | Automatic power control circuit |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5376895A (en) * | 1991-11-29 | 1994-12-27 | Matsushita Electric Industrial Co., Ltd. | Control circuit and method for transmission output |
| US5459426A (en) * | 1993-09-30 | 1995-10-17 | Nec Corporation | Output level control circuit for setting transmission output to desired level |
| US6920334B1 (en) | 2000-03-24 | 2005-07-19 | International Business Machines Corporation | Method and apparatus for providing gain control feedback in RF amplifiers |
| JP2013519277A (en) * | 2010-02-04 | 2013-05-23 | エプコス アクチエンゲゼルシャフト | Amplifier circuit and method for signal sensing |
| US8629719B2 (en) | 2010-02-04 | 2014-01-14 | Epcos Ag | Amplifier circuit and method for signal sensing |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0771054B2 (en) | 1995-07-31 |
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