JPH03206732A - Transmission power control circuit - Google Patents
Transmission power control circuitInfo
- Publication number
- JPH03206732A JPH03206732A JP180490A JP180490A JPH03206732A JP H03206732 A JPH03206732 A JP H03206732A JP 180490 A JP180490 A JP 180490A JP 180490 A JP180490 A JP 180490A JP H03206732 A JPH03206732 A JP H03206732A
- Authority
- JP
- Japan
- Prior art keywords
- section
- power
- current
- signal
- power supply
- 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
- 230000005540 biological transmission Effects 0.000 title claims abstract description 14
- 230000003321 amplification Effects 0.000 claims abstract description 24
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 24
- 238000001514 detection method Methods 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims abstract description 6
- 230000010355 oscillation Effects 0.000 abstract description 6
- 239000003990 capacitor Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
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Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は送信電力制御回路に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a transmission power control circuit.
従来、送信電力制御回路は任意の送信電力を得るように
第２図及び第３図に示す構成を採っている。この送信電
力制御回路において、２段の高周波増幅部１及び高周波
増幅部２にて増幅された高周波出力信号は高周波検波部
３にて検波され、電力比較部４へ入力される。電力比較
部４は予め決定された高周波出力信号の電力に応じた基
準電圧と高周波検波部３の検波出力電圧とを比較し、目
的とする高周波出力信号が得られるように電源供給部６
を制御する制御信号を出力する．電源供給部６は電源入
力端子７より入力される電源を電力比較部４からの制御
信号に応じて高周波増幅部１へ電源を供給する。高周波
増幅部１は電源供給部６によって制御された電源を供給
されることにより、増幅利得が変化する。この結果、高
周波入力端子８から高周波出力端子９までの総合利得を
変化することになり、基準電圧に応じた高周波出力信号
を高周波出力端子９に得ることができる。Conventionally, a transmission power control circuit has adopted the configuration shown in FIGS. 2 and 3 so as to obtain arbitrary transmission power. In this transmission power control circuit, the high frequency output signal amplified by the two-stage high frequency amplification section 1 and high frequency amplification section 2 is detected by the high frequency detection section 3 and input to the power comparison section 4. The power comparator 4 compares a reference voltage corresponding to the power of a predetermined high-frequency output signal with the detected output voltage of the high-frequency detector 3, and compares the detected output voltage of the high-frequency detector 3 with the power supply unit 6 to obtain the desired high-frequency output signal.
Outputs a control signal to control the The power supply section 6 supplies the power input from the power input terminal 7 to the high frequency amplification section 1 in accordance with the control signal from the power comparison section 4 . The high frequency amplification section 1 is supplied with power controlled by the power supply section 6, so that the amplification gain changes. As a result, the overall gain from the high frequency input terminal 8 to the high frequency output terminal 9 is changed, and a high frequency output signal corresponding to the reference voltage can be obtained at the high frequency output terminal 9.
上記電力比較部４及び電源供給部６の詳細構成を示す第
３図において、電力比較部４は演算増幅器１３、抵抗１
０．１１及びコンデンサ１２から構成され、かつ電源供
給部６はＰＮＰ型トランジスタ１７、ＮＰＮ型トランジ
スタ１６及び抵抗１４．１５から楕戒される。電力比較
部４の抵抗１０、抵抗１１及びコンデンサ１２は送信電
力制御回路全体のループ利得及び位相特性の関係で発振
しないようにするためのものであり、ある周波数特性を
与えて利得を決定している。電源供給部６の抵抗１４．
１５はトランジスタ１６．１７を保護するために設けて
ある。演算増幅器１３は入力される２つの信号である基
準電圧及び検波出力電圧を比較し、基準電圧と検波出力
電圧との差に応じて出力端子に接続された電源供給部６
の抵抗１４を通してＮＰＮ型トランジスタｌ６のベース
へ電流ｉｂｌを流す。ＮＰＮ型トランジスタ１６では電
流ｉｂｌが流れることにより、電流増幅率βに応じた電
流ｉｂ１が流れる。さらに、電流ｉｂ２が流れることに
より、ＰＮＰ型トランジスタ１７では、やはりトランジ
スタのβに応じた電流ｉｃ２が流れる。この電流ｉｃ２
は高周波増幅部１へ供給される。従って、電流ｉｃ２の
流れる量を制御することにより、高周波増幅部１への電
源供給を制御できる。In FIG. 3 showing the detailed configuration of the power comparison section 4 and the power supply section 6, the power comparison section 4 includes an operational amplifier 13 and a resistor 1.
0.11 and a capacitor 12, and the power supply section 6 is connected to a PNP transistor 17, an NPN transistor 16, and a resistor 14.15. The resistor 10, the resistor 11, and the capacitor 12 of the power comparator 4 are used to prevent oscillation due to the relationship between the loop gain and phase characteristics of the entire transmission power control circuit, and the gain is determined by giving a certain frequency characteristic. There is. Resistor 14 of power supply section 6.
15 is provided to protect transistors 16 and 17. The operational amplifier 13 compares the reference voltage and the detected output voltage, which are two input signals, and outputs the power supply unit 6 connected to the output terminal according to the difference between the reference voltage and the detected output voltage.
A current ibl flows through the resistor 14 to the base of the NPN transistor l6. As the current ibl flows through the NPN transistor 16, a current ib1 flows according to the current amplification factor β. Furthermore, as the current ib2 flows, a current ic2 corresponding to β of the transistor also flows in the PNP transistor 17. This current ic2
is supplied to the high frequency amplification section 1. Therefore, by controlling the amount of current ic2 flowing, the power supply to the high frequency amplification section 1 can be controlled.
上述した制御回路は特に携帯無線機などのようにバッテ
リを電源とする無線装置に用いられており、高い送信電
力を必要とする場合に限られた電源電圧を十分に高周波
増幅部１へ供給することが可能である。The above-described control circuit is particularly used in wireless devices that use batteries as a power source, such as portable wireless devices, and supplies a sufficient amount of limited power supply voltage to the high-frequency amplification section 1 when high transmission power is required. Is possible.
しかしながら、従来の送信電力制御回路においては、電
源供給部の構成上、トランジスタの電流増幅率βの値の
変化がそのまま送信電力制御回路全体のループ利得の変
化となることを免れない。However, in the conventional transmission power control circuit, due to the configuration of the power supply section, a change in the value of the current amplification factor β of the transistor inevitably results in a change in the loop gain of the entire transmission power control circuit.
このループ利得の変化が顕著な場合には、ある周波数で
発振条件を満し、発振を始めることがあり、制御回路と
して正常に動作しなくなってしまう。通常、増幅率βの
変化に関しては、温度等の環境変化を除いたとしてもト
ランジスタの動作点の変化だけでも大きく変化するもの
である。また、上述したような電源供給部の構戒の場合
２つのトランジスタの増幅率βの影響は積となって現わ
れ、ループ利得の変化は一層大きくなる。If this change in loop gain is significant, the oscillation condition may be met at a certain frequency and oscillation may begin, causing the control circuit to malfunction. Normally, the change in the amplification factor β will change significantly even if environmental changes such as temperature are excluded, even if only the operating point of the transistor changes. Furthermore, in the case of the above-mentioned configuration of the power supply section, the influence of the amplification factor β of the two transistors appears as a product, and the change in the loop gain becomes even larger.
本発明は利得を変化させることが可能な高周波増幅部の
出力電力を検出する高周波検波部と、前記高周波検波部
の出力信号と基準電圧信号とを比較する電力比較部と、
前記電力比較部により比較した信号によって前記基準電
圧信号に応じた高周波出力電力を得るように前記高周波
増幅部への電源供給を制御する電源供給部とから構成さ
れる送信電力制御回路において、前記電力比較部により
比較した信号を電圧信号から電流信号に変換する第１の
手段と前記第１の手段により変換された電流信号で前記
電源供給部を制御する第２の手段とから戒る電圧・電流
変換部を備える。The present invention includes: a high-frequency detection section that detects the output power of a high-frequency amplification section whose gain can be changed; a power comparison section that compares the output signal of the high-frequency detection section with a reference voltage signal;
and a power supply section that controls power supply to the high frequency amplification section so as to obtain high frequency output power according to the reference voltage signal based on the signal compared by the power comparison section. A first means for converting the signal compared by the comparison section from a voltage signal to a current signal, and a second means for controlling the power supply section with the current signal converted by the first means. A converter is provided.
また、前記電圧・電流変換部の前記第１の手段が演算増
幅器の一方の入力端子をこの演算増幅器の出力に接続し
たトランジスタの出力に接続し前記演算増幅器の他方の
入力端子に入力される前記電力比較部からの電圧信号を
電流信号に変換する構成であり、かつ前記第２の手段が
カレントミラー回路であってもよい。Further, the first means of the voltage/current converter connects one input terminal of an operational amplifier to the output of a transistor connected to the output of the operational amplifier, and the first means inputs the input terminal to the other input terminal of the operational amplifier. The second means may be configured to convert a voltage signal from the power comparator into a current signal, and the second means may be a current mirror circuit.
次に、本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.
本発明の一実施例を示す第１図を参照すると、第２図及
び第３図に示す従来の送信電力制御回路と同一構成要素
は同一参照数字により示している。なお、基準電圧入力
端子５に入力された基準電圧に応じた送信電力を得るた
めの動作については従来の技術と同様であり説明を省略
する．ここでは、特に電力比較部４と電圧・電流変換部
２６の動作について説明する。Referring to FIG. 1 showing an embodiment of the present invention, the same components as those of the conventional transmission power control circuit shown in FIGS. 2 and 3 are designated by the same reference numerals. Note that the operation for obtaining the transmission power according to the reference voltage input to the reference voltage input terminal 5 is the same as that of the conventional technology, and therefore a description thereof will be omitted. Here, the operations of the power comparator 4 and the voltage/current converter 26 will be particularly described.
電力比較部４を構戒する演算増幅器１３で基準電圧入力
端子５より入力される基準電圧と高周波検波部３より出
力される検波出力電圧とを比較し、その差に応じた電圧
信号が電圧・電流変換部２６へ入力される。電圧・電流
変換部２６では電力比較部４から電圧信号が演算増幅器
１８の正相端子（＋）へ入力される。演算増幅器１８は
トランジスタ２３と接続され、Ａ点を出力とするボルテ
ージフォロワ回路を構或しており、Ａ点の電圧は演算増
幅器１８の正相端子に入力された電圧と同じになる。抵
抗１つへは電源端子２２からトランジスタ２０及びトラ
ンジスタ２３を通して電流ｉｌが流れる。電流１１の値
はＡ点の電圧によつて決定されており、演算増幅器１８
に入力された電圧に応じた電流１１が流れることになる
（電圧・電流変換）。従って、電流１２も演算増幅器１
８に入力された電圧に応じた電流値になる．さらに、ト
ランジスタ２０及びトランジスタ２１より楕戒される第
１のカレントミラー回路により電流ｉ３も同じ電流値と
なる。また、トランジスタ２４及びトランジスタ２５よ
り構成される第２のカレントミラー回路によって電流ｉ
４も同じ電流値となる．電流ｉ４が流れることにより、
電源供給部２９のトランジスタ２８のベース電流が抵抗
２７を通して流れ、この結果高周波増幅部１へ供給する
電流ｉ５が流れる。従って、高周波増幅部１に供給され
る電流ｉ５は電力比較部４で発生した電圧に応じて流れ
る。The operational amplifier 13 that connects the power comparator 4 compares the reference voltage input from the reference voltage input terminal 5 with the detected output voltage output from the high frequency detector 3, and a voltage signal corresponding to the difference is determined as the voltage. The current is input to the current converter 26. In the voltage/current converter 26 , the voltage signal from the power comparator 4 is input to the positive phase terminal (+) of the operational amplifier 18 . The operational amplifier 18 is connected to the transistor 23 and constitutes a voltage follower circuit whose output is the point A, and the voltage at the point A is the same as the voltage input to the positive phase terminal of the operational amplifier 18. A current il flows from the power supply terminal 22 through the transistors 20 and 23 to one resistor. The value of current 11 is determined by the voltage at point A, and operational amplifier 18
A current 11 will flow in accordance with the voltage input to (voltage/current conversion). Therefore, the current 12 also flows through the operational amplifier 1.
The current value corresponds to the voltage input to 8. Furthermore, the current i3 has the same current value due to the first current mirror circuit that is elliptical from the transistors 20 and 21. In addition, a second current mirror circuit composed of a transistor 24 and a transistor 25 generates a current i.
4 has the same current value. As the current i4 flows,
The base current of the transistor 28 of the power supply section 29 flows through the resistor 27, and as a result, the current i5 supplied to the high frequency amplification section 1 flows. Therefore, the current i5 supplied to the high frequency amplification section 1 flows in accordance with the voltage generated by the power comparison section 4.
以上説明したように本発明によれば、電力比較部と電源
供給部との間に電圧・電流変換部を設けることにより、
電源供給部のトランジスタの電流増幅率の変化を防止し
、発振を起こすことなく安定に制御動作を行うことがで
きる。また、携帯無線機などに適用した場合でも限られ
た電源電圧を十分に高周波増幅部へ供給することが可能
である。As explained above, according to the present invention, by providing the voltage/current conversion section between the power comparison section and the power supply section,
It is possible to prevent changes in the current amplification factor of the transistor in the power supply section and perform stable control operations without causing oscillation. Further, even when applied to a portable radio device, etc., it is possible to sufficiently supply the limited power supply voltage to the high frequency amplification section.
第１図は本発明の一実施例を示す楕戒図、第２図及び第
３図は従来例を示す楕戒図である。
１・・・高周波増幅部、２・・・高周波増幅部、３・・
・高周波検波部、４・・・電力比較部、２６・・・電圧
・電流変換部、２つ・・・電源供給部。FIG. 1 is an elliptical diagram showing one embodiment of the present invention, and FIGS. 2 and 3 are elliptic diagrams showing conventional examples. 1...High frequency amplification section, 2...High frequency amplification section, 3...
- High frequency detection section, 4... Power comparison section, 26... Voltage/current conversion section, 2... Power supply section.
Claims (1)
電力を検出する高周波検波部と、前記高周波検波部の出
力信号と基準電圧信号とを比較する電力比較部と、前記
電力比較部により比較した信号によって前記基準電圧信
号に応じた高周波出力電力を得るように前記高周波増幅
部への電源供給を制御する電源供給部とから構成される
送信電力制御回路において、前記電力比較部により比較
した信号を電圧信号から電流信号に変換する第１の手段
と前記第１の手段により変換された電流信号で前記電源
供給部を制御する第２の手段とから成る電圧・電流変換
部を備えることを特徴とする送信電力制御回路。 ２、前記電圧・電流変換部の前記第１の手段が演算増幅
器の一方の入力端子をこの演算増幅器の出力に接続した
トランジスタの出力に接続し前記演算増幅器の他方の入
力端子に入力される前記電力比較部からの電圧信号を電
流信号に変換する構成であり、かつ前記第２の手段がカ
レントミラー回路であることを特徴とする送信電力制御
回路。[Scope of Claims] 1. A high-frequency detection section that detects the output power of a high-frequency amplification section whose gain can be changed; and a power comparison section that compares the output signal of the high-frequency detection section and a reference voltage signal; and a power supply section that controls power supply to the high frequency amplification section so as to obtain high frequency output power according to the reference voltage signal based on the signal compared by the power comparison section. A voltage/current conversion comprising a first means for converting a signal compared by a comparing section from a voltage signal to a current signal, and a second means for controlling the power supply section with the current signal converted by the first means. A transmission power control circuit comprising: a. 2. The first means of the voltage/current converter connects one input terminal of an operational amplifier to the output of a transistor connected to the output of the operational amplifier, and the first means inputs the voltage to the other input terminal of the operational amplifier. A transmission power control circuit configured to convert a voltage signal from a power comparison section into a current signal, and characterized in that the second means is a current mirror circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001804A JP2605904B2 (en) | 1990-01-08 | 1990-01-08 | Transmission power control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001804A JP2605904B2 (en) | 1990-01-08 | 1990-01-08 | Transmission power control circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03206732A true JPH03206732A (en) | 1991-09-10 |
| JP2605904B2 JP2605904B2 (en) | 1997-04-30 |
Family
ID=11511763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001804A Expired - Fee Related JP2605904B2 (en) | 1990-01-08 | 1990-01-08 | Transmission power control circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2605904B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007189413A (en) * | 2006-01-12 | 2007-07-26 | Niigata Seimitsu Kk | Automatic power output control circuit |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4036370B2 (en) | 2003-06-02 | 2008-01-23 | 日本航空電子工業株式会社 | Electrical connector and manufacturing method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6118644U (en) * | 1984-07-04 | 1986-02-03 | 日本電気株式会社 | Transmission output control circuit |
| JPH01204515A (en) * | 1988-02-10 | 1989-08-17 | Mitsubishi Electric Corp | Power amplifier |
-
1990
- 1990-01-08 JP JP2001804A patent/JP2605904B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6118644U (en) * | 1984-07-04 | 1986-02-03 | 日本電気株式会社 | Transmission output control circuit |
| JPH01204515A (en) * | 1988-02-10 | 1989-08-17 | Mitsubishi Electric Corp | Power amplifier |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007189413A (en) * | 2006-01-12 | 2007-07-26 | Niigata Seimitsu Kk | Automatic power output control circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2605904B2 (en) | 1997-04-30 |
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|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |