JPS61131917A - Transmitter - Google Patents

Transmitter

Info

Publication number
JPS61131917A
JPS61131917A JP59253602A JP25360284A JPS61131917A JP S61131917 A JPS61131917 A JP S61131917A JP 59253602 A JP59253602 A JP 59253602A JP 25360284 A JP25360284 A JP 25360284A JP S61131917 A JPS61131917 A JP S61131917A
Authority
JP
Japan
Prior art keywords
output
diodes
detector
coupling
transmitter
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
JP59253602A
Other languages
Japanese (ja)
Inventor
Koji Suzuki
鈴木　好治
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.)
NEC Corp
Original Assignee
NEC Corp
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 NEC Corp filed Critical NEC Corp
Priority to JP59253602A priority Critical patent/JPS61131917A/en
Publication of JPS61131917A publication Critical patent/JPS61131917A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/52—TPC using AGC [Automatic Gain Control] circuits or amplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details 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
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B1/0458—Arrangements for matching and coupling between power amplifier and antenna or between amplifying stages
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details 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
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B2001/0408—Circuits with power amplifiers
    • H04B2001/0416—Circuits with power amplifiers having gain or transmission power control

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Transmitters (AREA)

Abstract

PURPOSE:To change a transmission output over a wide range by rectifying an output of each coupling circuit with a detection diode and synthesizing a voltage obtained through current flowing to a logarithmic conversion diode so as to obtain a detected output. CONSTITUTION:A detector 40 is provided with coupling circuits Z1-Z3 (411-413), each output is detected by diodes X1, X3, X5 (431-433) and DC currents I1-I3 flow in proportion to the root of transmission power P. In flowing them to diodes X2, X4, X6 (461-463), terminal voltages V1-V3 of the diodes are expressed as Vn=K1logIn, where K1 is a constant and n=1, 2, 3.... The voltages V1-V3 are expressed by Vn=K2logP and in synthesizing the voltages V1-V3 by a synthesizer 8, since the voltage and the logarithm of power change linearly, the transmission power is controlled over a wide range.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は高周波信号レベルの検出器を備えた送信機に関
し、特に無線送信機の送信１カレベルの検出に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a transmitter equipped with a high frequency signal level detector, and more particularly to the detection of the transmission level of a radio transmitter.

（従来の技術） 無線送信機の一部を結合回路で分岐して整流し、送信出
力に対応して直流信号を作り、この直流信号を基準直流
電圧と比較し、得られた誤差分を送信回路に負帰還して
送信出力が一定になるように制御する自動出力制御回路
が移動無線通信機に使用されている。しかし、移動局が
基地局に極めて接近した場合には、他の移動局への妨害
を少なくするため、斯かる通信機の送信電力は小さくす
る必要がある。(Prior art) A part of the wireless transmitter is branched and rectified by a coupling circuit, a DC signal is created corresponding to the transmission output, this DC signal is compared with a reference DC voltage, and the resulting error is transmitted. Automatic output control circuits are used in mobile radio communication devices that control the transmission output to be constant by providing negative feedback to the circuit. However, when a mobile station is very close to a base station, the transmit power of such a communicator must be reduced in order to reduce interference to other mobile stations.

第３図は、従来技術による検波器を含む送信機の実例を
示すブロック図である。第３図において、■はドライバ
増幅器、２は成力増幅器、３はアイソレータ、４は検波
器、５は比較器、６は直流増幅器、７は基準電圧発生器
である。FIG. 3 is a block diagram illustrating an example of a transmitter including a detector according to the prior art. In FIG. 3, ■ is a driver amplifier, 2 is a power amplifier, 3 is an isolator, 4 is a detector, 5 is a comparator, 6 is a DC amplifier, and 7 is a reference voltage generator.

また、検波器４において、４１は結合回路（Ｚｌ）、４
２　、４４はそれぞれ抵抗器（Ｒｔ、Ｅｌ、ｚ）、４３
はダイオード（Ｘ）、４４はコンデンサ（Ｃ）である。In addition, in the detector 4, 41 is a coupling circuit (Zl);
2 and 44 are resistors (Rt, El, z), 43
is a diode (X), and 44 is a capacitor (C).

第３図にかいて、無線信号はト°ライバ増幅器１から電
力増幅器２に送出され、送信出力レベルに至るまで増幅
される。この出力はアイソレータ３を介して出力端子１
２に送出される。電力増幅器２の出力は分岐されて検波
器４にも与えられて、送信出力に応じた直流信号を得て
いる。In FIG. 3, a wireless signal is sent from a driver amplifier 1 to a power amplifier 2, where it is amplified up to the transmission output level. This output is passed through isolator 3 to output terminal 1.
2 is sent out. The output of the power amplifier 2 is branched and also given to the detector 4 to obtain a DC signal corresponding to the transmission output.

この直流信号は、比較器５のいっぽうの入力に与えられ
る。比較器５の他方の入力には基準電圧発生器７の出力
が与えられており、これら両入力の誤差分が比較器５の
出力に得られる。この出力は直流増幅器６を介してドラ
イバ増幅器ｌに負帰還される。This DC signal is applied to one input of comparator 5. The output of the reference voltage generator 7 is given to the other input of the comparator 5, and the error between these two inputs is obtained as the output of the comparator 5. This output is negatively fed back to the driver amplifier l via the DC amplifier 6.

ｆ＆、基準電圧発生器７を制御入力１子１３上の制御信
号入力により制御して出力電圧をさげれば送信出力は負
帰還により低下することになる。f&, if the reference voltage generator 7 is controlled by the control signal input on the control input 1 13 to lower the output voltage, the transmission output will be lowered due to negative feedback.

（発明が解決しようとする問題点） しかし、斯かる方式では多くのゾーンを共用し、それぞ
れのゾーンの大きさが異な不移動無線システムにおいて
、移動形送信機の送信出力をそれぞれのゾーンに合せて
変更するとともに、送信電力を低減するシステムでは、
送信電力の制御範囲を非常に広範囲（例えば、３ｏｄＢ
）に変える必要があり、従来の方式では電源成田の関係
上、特別な工夫をしない限り比較器のダイナミックレン
ジが不足すると云う欠点があっ念。(Problem to be Solved by the Invention) However, in such a system, in a fixed wireless system that shares many zones and each zone has a different size, it is difficult to adjust the transmission output of the mobile transmitter to each zone. In a system that changes the transmission power and reduces the transmit power,
The transmission power control range is very wide (for example, 3 odB
), and the conventional method has the disadvantage that the dynamic range of the comparator is insufficient unless special measures are taken, due to the power supply at Narita.

本発明の目的は、結合度の異なる複数個の結合回路を有
し、それすれの結合回路の出力を検波ダイオードによっ
て整流し、対数変換用ダイオード°に電流を流すことに
よって得られた電圧を合成して得た検波出力を利用する
ことにょプ上記欠点を除去し、広範囲にわたって送信出
力を可変できるように構成した送信機を提供することに
ある。The object of the present invention is to have a plurality of coupling circuits with different degrees of coupling, rectify the output of each coupling circuit with a detection diode, and synthesize a voltage obtained by flowing a current through a logarithmic conversion diode. It is an object of the present invention to provide a transmitter configured to eliminate the above-mentioned drawbacks by utilizing the detected output obtained by the above-mentioned detection, and to be able to vary the transmission output over a wide range.

（問題点を解決するための手段） 本発明による送信機はドライバ増幅器、電力増幅器、検
波器、合成器、比較器、ならびに直流増幅器より成る閉
ループにより送信電力を制御できるように構成したもの
である。(Means for Solving the Problems) A transmitter according to the present invention is configured so that transmission power can be controlled by a closed loop consisting of a driver amplifier, a power amplifier, a detector, a combiner, a comparator, and a DC amplifier. .

上記において、検出器は複数個の結合回路と、複数個の
整流回路と、複数個の対数変換用ダイオードとを備え念
ものである。合成器は、複数個の整流回路の出力を合成
するためのものである。In the above, the detector includes a plurality of coupling circuits, a plurality of rectifier circuits, and a plurality of log conversion diodes. The combiner is for combining the outputs of a plurality of rectifier circuits.

複数個の結合回路は、電力増幅器の出力を取出す九めの
それぞれ結合度の異なるものである。The plurality of coupling circuits each take out the output of the power amplifier and each has a different degree of coupling.

複数個の整流回路は複数個の整流用ダイオードより成る
ものであり、それぞれ複数個の結合回路からの複数のＲ
Ｆ信号を検波するためのものである。The plurality of rectifier circuits are composed of a plurality of rectifying diodes, each of which has a plurality of R
This is for detecting the F signal.

複数個の対数変換用ダイオードは、それぞれ複数個の整
流用ダイオードと共通電位点との間（挿入したものであ
る。The plurality of logarithmic conversion diodes are inserted between the plurality of rectification diodes and a common potential point.

（実　施　例） 次に、本発明の実施例について図面を参四して説明する
。(Example) Next, an example of the present invention will be described with reference to the drawings.

第１図は、本発明による送信機の一実施例を示すブロッ
ク図である。第１図において、第３図と同様な要素には
同様な番号を付してあり、４０は検波器、８は合成器で
ある。検織器４ｏにおいて、４１１〜４１３はそれぞれ
結合回路（ｚ１〜ｚ３）、４２１〜４２３はそれぞれ抵
抗器（Ｒ１−Ｒ，ａ　）、４３１〜４３３はそれぞれダ
イオード（ＸＩ、Ｘ３．Ｘ１１）、４４１−４４３はそ
れぞれ抵抗器（ＰＬ４〜Ｒ１６）、４５１〜４５３はそ
れぞれコンデンサ（０１〜Ｏｓ）、４６１〜４６３はそ
れぞれダイオード（Ｘ２　、　Ｘ４　、　ＸＩ　’）で
ある。第１図に示す送信機の回路構成は、第３図に説明
した従来技術による送信機の回路構成と大部分が同一で
あり、送信電力は負帰還制御にょプ安定化されるように
構成されている。FIG. 1 is a block diagram showing one embodiment of a transmitter according to the present invention. In FIG. 1, the same elements as in FIG. 3 are given the same numbers, 40 is a detector, and 8 is a combiner. In the weaving machine 4o, 411-413 are coupling circuits (z1-z3), 421-423 are resistors (R1-R,a), 431-433 are diodes (XI, X3.X11), 441- 443 are resistors (PL4 to R16), 451 to 453 are capacitors (01 to Os), and 461 to 463 are diodes (X2, X4, XI'), respectively. The circuit configuration of the transmitter shown in FIG. 1 is mostly the same as the circuit configuration of the conventional transmitter explained in FIG. 3, and is configured so that the transmission power is stabilized by negative feedback control. ing.

まず、検波器４０に複数個の結合回路（ｚ１〜Ｚ３）４
１１〜４１３を備え、それぞれの出力はダ’（ｙＪ−−
ト（Ｘｉ　、Ｘ３．ＸＩ　’ｌ　４３１〜４３３１ｃ！
ツテ検波される。そこで、ダイオード（Ｘｔ　、　Ｘ３
　。First, a plurality of coupling circuits (z1 to Z3) 4 are connected to the detector 40.
11 to 413, each output is DA'(yJ--
To (Xi, X3.XI 'l 431~4331c!
The wave is detected. Therefore, the diode (Xt, X3
.

ＸＩ　）　４３１〜４３３の直流電流工！〜Ｉ３は送信
゛心力Ｐに対して〆「に比例して流れる。これ会ダイオ
ードｒＸｚ、Ｘ４．Ｘ５）４ａｘ〜４６３に流すとダイ
オード（Ｘ２１Ｘ４．Ｘ６）４６１〜４６３の両端の電
圧ｖ１〜ｖ３は１流工１〜工３に対してＶｌ　ｍ　Ｋｌ
ｌｏｇ　Ｉｎ　　　　　　（１１となる。ただし、 Ｋ！：定数 ｎ土１，２，３．・・・・・・ が満足される。それぞれの電圧ｖ１〜ｖ３は送信電力に
対して Ｖｎ　＝Ｋｚ　　ｌｏｇ　Ｐ　　　　　　　（２１とな
る。九だし、 ｎｍｌ、２，３．・・・・・・ が満足される。この関係を第２図に示す。XI) 431-433 DC electricians! ~ I3 flows in proportion to the transmitting force P. When it flows through the diode rXz, X4.X5) 4ax ~ 463, the voltage v1 ~ v3 across the diode (X21X4. Vl m Kl for 1st grade engineering 1 to engineering 3
log In (11. However, K!: constant n 1, 2, 3...... is satisfied. Each voltage v1 to v3 is Vn = Kz log P ( 21. Since it is 9, nml, 2, 3, etc. is satisfied. This relationship is shown in Figure 2.

電圧Ｖｓ−Ｖｓを合成器８によって合成すれば、第２図
のような電圧と送信電力との関係が得られ、広範囲にわ
たって送信電力を制御することができる。If the voltages Vs-Vs are combined by the combiner 8, a relationship between voltage and transmission power as shown in FIG. 2 is obtained, and the transmission power can be controlled over a wide range.

（発明の効果） 本発明は以上説明したように、結合度の異なる複数個の
結合回路を設けて通信信号を検波し、それぞれの検波出
力を合成することにより広範囲に送信電力を制御できる
ようにして、異なる大きさのゾーンのそれぞれに使用さ
れる送信電力が大幅に異なる場合にも容易に対処できる
と云う効果がある。(Effects of the Invention) As explained above, the present invention detects a communication signal by providing a plurality of coupling circuits with different degrees of coupling, and by combining the respective detection outputs, it is possible to control transmission power over a wide range. This has the advantage that it is possible to easily deal with the case where the transmission powers used for zones of different sizes are significantly different.

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

第１図は、本発明による送信機の一実施例を示ｆブロッ
ク図である。 第２図は、第１図に示す検波器の応答特性の一例を示す
説明図である。 第３図は、従来技術による送信機の一例を示すブロック
図である。 １・・・ドライバ増幅器　　２・・・電力増幅器３・・
・アイソレータ　　４．４０・・・検波器５・・・比較
器　　　　　６・・・直流増幅器７・・・基準電圧発生
器　　８・・・合成器４１．４１１〜４１３・・・結合
回路 ４２、４４．４２１〜４２３　、４４１〜４４３・・・
抵抗器４３　、４３１〜４３３．４６１〜４６３・・・
ダイオード４５　、４５１〜４５３・・・コンデンサ１
１〜１３・・・端子 ！ ｌFIG. 1 is a block diagram showing one embodiment of a transmitter according to the present invention. FIG. 2 is an explanatory diagram showing an example of the response characteristics of the detector shown in FIG. 1. FIG. 3 is a block diagram showing an example of a transmitter according to the prior art. 1... Driver amplifier 2... Power amplifier 3...
・Isolator 4.40...Detector 5...Comparator 6...DC amplifier 7...Reference voltage generator 8...Synthesizer 41.411-413...Coupling circuit 42, 44. 421-423, 441-443...
Resistor 43, 431-433.461-463...
Diode 45, 451-453...Capacitor 1
1 to 13...terminals! l

Claims (1)

【特許請求の範囲】[Claims] ドライバ増幅器、電力増幅器、検波器、合成器、比較器
、ならびに直流増幅器より成る閉ループにより送信電力
を制御できるように構成した送信機であつて、前記検出
器が前記電力増幅器の出力を取出すための結合度の異な
る複数個の結合回路と、前記複数個の結合回路からの複
数のＲＦ信号をそれぞれ検波するための複数個の整流用
ダイオードより成る複数個の整流回路と、前記複数個の
整流用ダイオードと共通電位点との間にそれぞれ挿入し
た複数個の対数変換用ダイオードとから成り、前記合成
器が前記複数個の整流回路の出力を合成するものである
ように構成したことを特徴とする送信機。A transmitter configured to control transmission power by a closed loop consisting of a driver amplifier, a power amplifier, a detector, a combiner, a comparator, and a DC amplifier, wherein the detector is configured to take out the output of the power amplifier. a plurality of rectifier circuits each comprising a plurality of coupling circuits having different degrees of coupling, a plurality of rectifying diodes for respectively detecting a plurality of RF signals from the plurality of coupling circuits; It is characterized in that it consists of a plurality of logarithmic conversion diodes inserted between the diodes and a common potential point, and the synthesizer is configured to synthesize the outputs of the plurality of rectifier circuits. transmitter.
JP59253602A 1984-11-30 1984-11-30 Transmitter Pending JPS61131917A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59253602A JPS61131917A (en) 1984-11-30 1984-11-30 Transmitter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59253602A JPS61131917A (en) 1984-11-30 1984-11-30 Transmitter

Publications (1)

Publication Number Publication Date
JPS61131917A true JPS61131917A (en) 1986-06-19

Family

ID=17253658

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59253602A Pending JPS61131917A (en) 1984-11-30 1984-11-30 Transmitter

Country Status (1)

Country Link
JP (1) JPS61131917A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0548357A (en) * 1991-08-20 1993-02-26 Nec Corp Detection circuit
US6625429B1 (en) 1999-07-02 2003-09-23 Nec Corporation Mobile radio communication apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0548357A (en) * 1991-08-20 1993-02-26 Nec Corp Detection circuit
US6625429B1 (en) 1999-07-02 2003-09-23 Nec Corporation Mobile radio communication apparatus

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