JPS5883437A - Transmission power controlling system - Google Patents
Transmission power controlling systemInfo
- Publication number
- JPS5883437A JPS5883437A JP18108981A JP18108981A JPS5883437A JP S5883437 A JPS5883437 A JP S5883437A JP 18108981 A JP18108981 A JP 18108981A JP 18108981 A JP18108981 A JP 18108981A JP S5883437 A JPS5883437 A JP S5883437A
- Authority
- JP
- Japan
- Prior art keywords
- power
- power amplifier
- transmission power
- transmission
- supply voltage
- 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
Links
Classifications
-
- 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
-
- 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)
- Control Of Amplification And Gain Control (AREA)
- Transmitters (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は無線通信用送信機の送信電力制御方式の改良に
関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a transmission power control method for a wireless communication transmitter.
２Ｆ、１図は従来の送信電力制御方式の系統図である。Figures 2F and 1 are system diagrams of conventional transmission power control systems.
１は低レベルの送信信号入力端子、２は第１の電力増幅
器、３は第２の電力増幅器、４は方向性結合器、５はア
ンテナ、６は検波器、７は制御回路、８は電源電圧入力
端子、９は基準電圧入力端子である。端子１から加えら
れる送信信号は第１及び第２の電力増幅器２．３で増幅
され方向性結合器４を通りアンテナ５から送信される。1 is a low-level transmission signal input terminal, 2 is a first power amplifier, 3 is a second power amplifier, 4 is a directional coupler, 5 is an antenna, 6 is a detector, 7 is a control circuit, 8 is a power supply The voltage input terminal 9 is a reference voltage input terminal. A transmission signal applied from terminal 1 is amplified by first and second power amplifiers 2.3, passes through directional coupler 4, and is transmitted from antenna 5.
一方送倍電力の一部は方向性結合器４で分岐され、検波
器６で整流されて制御回路７に加えられる。制御回路７
は検波器６から加えられる直流電圧と、端子９から加え
られる基準電圧を比較し、アンテナ５から送信される送
信電力を一定とする様に第１の電力増幅器２の電源電圧
を制御する。すなわち。On the other hand, a part of the multiplied power is branched by a directional coupler 4, rectified by a detector 6, and applied to a control circuit 7. Control circuit 7
compares the DC voltage applied from the wave detector 6 with the reference voltage applied from the terminal 9, and controls the power supply voltage of the first power amplifier 2 so that the transmission power transmitted from the antenna 5 is constant. Namely.
送信電力は端子９の基準電圧により制御される。The transmission power is controlled by the reference voltage at terminal 9.
ここで第２の電力増幅回路３の電源電圧は送信型この送
信電力制御方式は、端子９に加える基準電圧を大きく変
えて送信電力を低下させる場合、第１２７）電力増幅器
２の電源電圧は制御されて利得が低下するが、第２の電
力増幅器３の電源電圧は変わらず、かつ注入電力が低下
するために動作点が変化して不安定になるという欠点を
有している。Here, the power supply voltage of the second power amplifier circuit 3 is a transmission type. In this transmission power control method, when the reference voltage applied to the terminal 9 is greatly changed to lower the transmission power, the power supply voltage of the power amplifier 2 is controlled. However, the power supply voltage of the second power amplifier 3 does not change, and since the injected power decreases, the operating point changes and becomes unstable.
本発明はこの欠点を除去するため、送信電力を大きく低
下させる時には第１の電力増幅器と共に第２の電力増幅
器の電源電圧をも制御し９両者の利得を低下させて安定
に動作する様にしたものである。In order to eliminate this drawback, the present invention controls the power supply voltage of the second power amplifier as well as the first power amplifier when greatly reducing the transmission power, thereby lowering the gains of both to ensure stable operation. It is something.
第２図は本発明の実施例による送信電力制御方式の系統
図を示す。図中第１図と同一番号のものは同一機能、１
０は切替スイッチである。次にこの動作を説明する。切
替スイッチ１０は通常は実線で示した方に接続されてお
り、この時の動作は第１図と全く同一につき説明を省略
する。次に端子９に加える基準電圧を大きく変えて送信
電力を低下させる場合、切替スイッチ１０は破線で示し
た方に接続さ７しる。すなわち第２の電力増幅器３の電
源電圧も制御回路７を介して得ることになる。送信電力
は低下しているため、第２の電力増幅器３の消費電流も
低下し、制御回路７の電流容量を越えることは無くなる
。このように送信電力を低下させる場合には第１及び第
２の電力増幅器２，３の電源電圧を低下させて利得を低
下させるため、第２の電力１幅器３の動作が不安定にな
るという欠点は無くなる。FIG. 2 shows a system diagram of a transmission power control method according to an embodiment of the present invention. Items with the same numbers as in Figure 1 have the same functions, 1
0 is a changeover switch. Next, this operation will be explained. The changeover switch 10 is normally connected to the side shown by the solid line, and the operation at this time is exactly the same as that in FIG. 1, so a description thereof will be omitted. Next, when reducing the transmission power by greatly changing the reference voltage applied to the terminal 9, the selector switch 10 is connected to the direction shown by the broken line. That is, the power supply voltage of the second power amplifier 3 is also obtained via the control circuit 7. Since the transmission power is reduced, the current consumption of the second power amplifier 3 is also reduced and does not exceed the current capacity of the control circuit 7. When lowering the transmission power in this way, the power supply voltage of the first and second power amplifiers 2 and 3 is lowered and the gain is lowered, so the operation of the second power amplifier 3 becomes unstable. That drawback disappears.
以上説明したごとく本発明によれば、ダイナミックレン
ジの広い送信電力の変化を容易に、かつ安定に行うこと
ができるので送信電力制御機能を有する無線通信機に適
用してより有効である。As described above, according to the present invention, it is possible to easily and stably change the transmission power over a wide dynamic range, and therefore it is more effective when applied to a wireless communication device having a transmission power control function.
第１図は従゛来例による送信電力制御方式の系統図、第
２図は本発明の実施例による送信電力制御方式の系統図
である。
２．３：電力増幅器、４二方向性績合器、６：検波器、
７：制御回路、９：基準電子入力端子。
１０：切替スイッチ。FIG. 1 is a system diagram of a conventional transmission power control system, and FIG. 2 is a system diagram of a transmission power control system according to an embodiment of the present invention. 2.3: Power amplifier, 4 bidirectional combiner, 6: Detector,
7: Control circuit, 9: Reference electronic input terminal. 10: Selector switch.
Claims (1)
準電圧と比較して前記第１の電力増幅器の電源電圧を制
御し、前記第１の電力増幅器の利ｉｔ変化させることに
より、前記第２の電力増幅器への供給電力を制御し、前
記第２の電力増幅器の出力すなわち送信電力を制御する
閉ループをもった送信機において、送信電力を低下させ
る場合にのみ前記第１の電力増幅器の電源電圧と前記第
２の電力増幅器の電源電圧とを、前記整流された直流電
圧を基準電圧と比較して同時に制御することを特徴とす
る送信電力制御方式。The power supply voltage of the first power amplifier is controlled by comparing the voltage of the first power amplifier and the second power amplifier in series with a reference voltage, and the gain of the first power amplifier is changed. In a transmitter having a closed loop that controls the power supplied to a second power amplifier and controls the output of the second power amplifier, that is, the transmission power, the power of the first power amplifier is reduced only when the transmission power is reduced. A transmission power control method characterized in that a power supply voltage and a power supply voltage of the second power amplifier are simultaneously controlled by comparing the rectified DC voltage with a reference voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18108981A JPS5883437A (en) | 1981-11-13 | 1981-11-13 | Transmission power controlling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18108981A JPS5883437A (en) | 1981-11-13 | 1981-11-13 | Transmission power controlling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5883437A true JPS5883437A (en) | 1983-05-19 |
Family
ID=16094624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18108981A Pending JPS5883437A (en) | 1981-11-13 | 1981-11-13 | Transmission power controlling system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5883437A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0522160A (en) * | 1991-07-12 | 1993-01-29 | Matsushita Electric Ind Co Ltd | Power amplifier circuit |
| US5796306A (en) * | 1995-08-28 | 1998-08-18 | Nec Corporation | Wide range variable output amplifier apparatus with high efficiency |
-
1981
- 1981-11-13 JP JP18108981A patent/JPS5883437A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0522160A (en) * | 1991-07-12 | 1993-01-29 | Matsushita Electric Ind Co Ltd | Power amplifier circuit |
| US5796306A (en) * | 1995-08-28 | 1998-08-18 | Nec Corporation | Wide range variable output amplifier apparatus with high efficiency |
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