JPH01233814A - Automatic power control circuit - Google Patents
Automatic power control circuitInfo
- Publication number
- JPH01233814A JPH01233814A JP6013288A JP6013288A JPH01233814A JP H01233814 A JPH01233814 A JP H01233814A JP 6013288 A JP6013288 A JP 6013288A JP 6013288 A JP6013288 A JP 6013288A JP H01233814 A JPH01233814 A JP H01233814A
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- transistor
- transmission power
- ground
- control circuit
- 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
- 230000005540 biological transmission Effects 0.000 claims description 25
- 238000001514 detection method Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 6
- 239000003990 capacitor Substances 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Landscapes
- Control Of Amplification And Gain Control (AREA)
- Transmitters (AREA)
Abstract
Description
【発明の詳細な説明】
〔概 要〕
電源に電池を使用する移動無線機の、差動増幅器を用い
送信電力を自動的に一定にする自動電力制御回路に関し
、
待受時に差動増幅器に流れる電流を小さくすることが出
来る自動電力制御回路の提供を目的とし、差動増幅器を
構成する第１．第２のトランジスタのエミッタに接続さ
れている第１の抵抗とアース間に高抵抗値の第２の抵抗
及び、動作時、待受時にオンオフするスイッチングトラ
ンジスタを挿入した構成とする。[Detailed Description of the Invention] [Summary] This invention relates to an automatic power control circuit that uses a differential amplifier to automatically keep the transmission power constant for a mobile radio device that uses a battery as a power source, in which the power flows to the differential amplifier during standby. The purpose of the present invention is to provide an automatic power control circuit that can reduce current. A second resistor having a high resistance value and a switching transistor that is turned on and off during operation and standby are inserted between the first resistor connected to the emitter of the second transistor and the ground.
本発明は、携帯無線機、自動車電話等の電源に電池を使
用する移動無線機の、差動増幅器を用い送信電力を自動
的に一定にする自動電力制御回路の改良に関する。The present invention relates to an improvement in an automatic power control circuit that uses a differential amplifier to automatically keep transmission power constant for mobile radio equipment such as portable radio equipment and car telephones that use batteries as a power source.
以下従来例を図を用いて説明する。 A conventional example will be explained below using figures.
第３図は従来例の自動電力制御回路の回路図である。FIG. 3 is a circuit diagram of a conventional automatic power control circuit.
第３図では、トランジスタＴＩ、Ｔ２にて差動増幅器を
構成し、一方のトランジスタＴＩのコレクタは抵抗ＲＩ
Ｏ，Ｒ９を介して１３．８Ｖの電源に接続されており、
抵抗Ｒ９，ＲＩＯを介してコレクタに流れる電流の大小
により、トランジスタＴ６のベース電圧を変化し、トラ
ンジスタＴ６を介して送信電力調整部２に流れる電流を
制御している。In FIG. 3, transistors TI and T2 constitute a differential amplifier, and the collector of one transistor TI is connected to a resistor RI.
Connected to the 13.8V power supply via O, R9,
The base voltage of the transistor T6 is changed depending on the magnitude of the current flowing to the collector via the resistors R9 and RIO, and the current flowing to the transmission power adjustment section 2 via the transistor T6 is controlled.
他方のトランジスタＴ２のコレクタは、１３゜８Ｖの電
源電圧を自動電圧調整器４にて５■にした電源に接続さ
れており、又トランジスタＴｌ。The collector of the other transistor T2 is connected to a power source whose power voltage of 13°8V is set to 5V by an automatic voltage regulator 4, and the collector of the transistor T1.
Ｔ２のエミッタは抵抗Ｒ１を介してアースに接続されて
いる。The emitter of T2 is connected to ground via resistor R1.
又トランジスタＴＩ、Ｔ２のベースとアース間には抵抗
Ｒ７，Ｒ８が接続されており、自動電圧調整器４の出力
の５■は抵抗Ｒ３，Ｒ４にて分圧されて基準電圧として
、エミソタフロワーとなっているトランジスタＴ４のベ
ースに入力し、この電圧が抵抗Ｒ７を介してトランジス
タＴｌのベースに加えられている。Also, resistors R7 and R8 are connected between the bases of the transistors TI and T2 and the ground, and the output 5 of the automatic voltage regulator 4 is divided by the resistors R3 and R4 and used as a reference voltage as an emitter floor. This voltage is applied to the base of transistor T1 via resistor R7.
又送信電力に対応している出力電圧は電圧検出部３にて
検出され基準電圧と対応する値とされ、エミッタフロワ
ーとなっているトランジスタＴ５のベースに入力し、こ
の電圧が抵抗Ｒ８を介してトランジスタＴ２のベースに
加えられている。Further, the output voltage corresponding to the transmission power is detected by the voltage detection unit 3, is set to a value corresponding to the reference voltage, and is input to the base of the transistor T5 serving as the emitter floor, and this voltage is passed through the resistor R8. It is added to the base of transistor T2.
従って、送信電力が大になると、電圧検出部３の出力の
電圧は大となり、抵抗Ｒ１を流れる電流は一定であるの
で、トランジスタＴＩに流れる電流は小となる。Therefore, when the transmission power becomes large, the voltage output from the voltage detection section 3 becomes large, and since the current flowing through the resistor R1 is constant, the current flowing through the transistor TI becomes small.
すると、トランジスタＴ６のエミッタとベース間の電圧
は低くなり、トランジスタＴ６に流れる電流は小となり
、送信電力調整部２では、送信電力を小にするように動
作するので、送信電力は自動的に一定になるよう制御さ
れる。Then, the voltage between the emitter and base of the transistor T6 becomes low, the current flowing through the transistor T6 becomes small, and the transmission power adjustment section 2 operates to reduce the transmission power, so the transmission power is automatically kept constant. controlled to become
又スイッチングトランジスタＴ７を、トランジスタＴ４
のベースとアース間に接続し、このスイッチングトラン
ジスタＴ７を、オフとすることで送信電力を出力させ、
オンとすることでトランジスタＴ４に流れる電流をＯに
して、送信電力を０とすると共に、トランジスタ１゛５
に流れる電流も０として、移動無線機を待受状態として
いる。In addition, the switching transistor T7 is replaced with the transistor T4.
The switching transistor T7 is connected between the base of the transistor T7 and the ground, and the transmission power is output by turning off the switching transistor T7.
By turning on the transistor T4, the current flowing through the transistor T4 becomes O, the transmission power becomes 0, and the transistor T4 becomes 0.
The current flowing through the terminal is also set to 0, and the mobile radio is placed in a standby state.
尚自動電圧調整器４の出力の５ｖは、トランジスタＴ４
．Ｔ５のコレクタに与えられており又１３．５Ｖは送信
電力増幅器ｌの電源として与えられており、ＣＩ、Ｃ２
は１μＦ程度のコンデンサであり、Ｒ１１，Ｒ１２は抵
抗を示す。Note that the output of 5V from the automatic voltage regulator 4 is connected to the transistor T4.
．． 13.5V is given to the collector of T5, and 13.5V is given as a power supply to the transmitting power amplifier l, and CI, C2
is a capacitor of about 1 μF, and R11 and R12 represent resistances.
しかしながら、従来の自動電力制御回路は待受時にも、
差動増幅器の抵抗Ｒ１には、例えば１０ｍＡ程度の電流
が流れ続け、移動無線機の如（電源に電池を使うもので
は、電池の放電時間が早くなる問題点がある。However, conventional automatic power control circuits
For example, a current of about 10 mA continues to flow through the resistor R1 of the differential amplifier, and in devices such as mobile radios (which use batteries as a power source), there is a problem in that the battery discharge time is accelerated.
本発明は、待受時に差動増幅器に流れる電流を小さくす
ることが出来る自動電力制御回路の提供を目的としてい
る。An object of the present invention is to provide an automatic power control circuit that can reduce the current flowing through a differential amplifier during standby.
第１図は本発明の原理回路図である。 FIG. 1 is a circuit diagram of the principle of the present invention.
第１図に示す如く、差動増幅器を構成する第１のトラン
ジスタＴ１及び第２のトランジスタＴ２のエミッタを第
１の抵抗Ｒ１に接続し、該第１のトランジスタＴｌのコ
レクタを、送信電力増幅器１の、電流の大小により送信
電力を調整する送信電力調整部２に接続し、ベースには
基準電圧を与る。As shown in FIG. 1, the emitters of a first transistor T1 and a second transistor T2 constituting a differential amplifier are connected to a first resistor R1, and the collector of the first transistor Tl is connected to a transmission power amplifier 1. It is connected to a transmission power adjustment section 2 that adjusts the transmission power according to the magnitude of the current, and a reference voltage is applied to the base.
又該第２のトランジスタＴ２のコレクタを、電源■に接
続し、ベースには該送信電力増幅器ｌの出力電圧を電圧
検出部３を介して与える。Further, the collector of the second transistor T2 is connected to the power supply (2), and the output voltage of the transmission power amplifier (1) is applied to the base via the voltage detection section (3).
そして、該送信電力増幅器１の送信電力を自動的に一定
にする自動電力制御回路において、該第１の抵抗Ｒ１と
アース間に高抵抗値の第２の抵抗Ｒ２及び動作時、待受
時にオンオフするスイッチングトランジスタＴ３を挿入
する。In an automatic power control circuit that automatically keeps the transmission power of the transmission power amplifier 1 constant, a second resistor R2 having a high resistance value is connected between the first resistor R1 and the ground, and is turned on and off during operation and standby. A switching transistor T3 is inserted.
本発明によれば、差動増幅器のエミッタ例の抵抗Ｒ１と
アース間に、高抵抗値の第２の抵抗Ｒ２及び動作時９待
受時にオンオフするスイッチングトランジスタＴ３が挿
入してあり、動作時はオンとするので、第１の抵抗Ｒ１
はアースに接続された状態になり、通常の動作をし、待
受時はオフとするので、差動増幅器のエミッタとアース
間には第１の抵抗Ｒ１と高抵抗値の第２の抵抗Ｒ２とが
直列に挿入され、ここを流れる電流は非常に小さくなる
。According to the present invention, a second resistor R2 with a high resistance value and a switching transistor T3 that is turned on and off during standby are inserted between the resistor R1 of the emitter of the differential amplifier and the ground. Since it is turned on, the first resistor R1
is connected to ground, operates normally, and is off during standby, so a first resistor R1 and a second resistor R2 with a high resistance value are connected between the emitter of the differential amplifier and ground. are inserted in series, and the current flowing through them becomes very small.
従って、電源の電池の放電時間を遅くすることが出来る
。Therefore, the discharge time of the battery of the power source can be delayed.
以下本発明の１実施例に付き図に従って説明する。 An embodiment of the present invention will be described below with reference to the accompanying drawings.
第２図は本発明の実施例の自動電力制御回路の回路図で
ある。FIG. 2 is a circuit diagram of an automatic power control circuit according to an embodiment of the present invention.
第２図で第３図の場合と異なる点は、抵抗Ｒ１゜Ｒ７，
Ｒ８の一端を接続し、この接続点とアース間に高抵抗値
の抵抗Ｒ２及びスイッチングトランジスタＴ３を挿入し
、第３図のスイッチングトランジスタＴ７の回路を除い
た点である。The difference in Fig. 2 from Fig. 3 is that the resistances R1゜R7,
One end of R8 is connected, a high-resistance resistor R2 and a switching transistor T3 are inserted between this connection point and the ground, and the circuit of the switching transistor T7 in FIG. 3 is removed.
以下この異なる点を中心に説明する。This different point will be mainly explained below.
動作時は、スイッチングトランジスタＴ３のベースに、
抵抗Ｒ５，Ｒ６にて分圧した電圧を与えオンとし、第３
図の場合で説明した送信電力を一定にする動作をさせる
。During operation, at the base of the switching transistor T3,
A voltage divided by resistors R5 and R6 is applied to turn on the third
The operation to keep the transmission power constant as explained in the case of the figure is performed.
待受時は、スイッチングトランジスタＴ３のベースの電
圧をＯにしてオフとし、差動増幅器の抵抗Ｒ１及びトラ
ンジスタＴ４．Ｔ５に接続されている抵抗Ｒ７，Ｒ８と
、アース間に、例えば１００・ＫΩ程度の高抵抗値の抵
抗Ｒ２を挿入する。During standby, the voltage at the base of the switching transistor T3 is set to O to turn it off, and the resistor R1 of the differential amplifier and the transistor T4. A resistor R2 having a high resistance value of, for example, about 100 KΩ is inserted between the resistors R7 and R8 connected to T5 and the ground.
すると、ここに流れる電流は数μＡ程度と小さくなる。Then, the current flowing here becomes small, on the order of several μA.
即ち、待受時に自動電力制御回路を流れる電流は非常に
小さくなるので、電源の電池の放電時間を遅くすること
が出来る。That is, since the current flowing through the automatic power control circuit during standby becomes very small, the discharging time of the battery of the power source can be delayed.
以上詳細、に説明せる如く本発明によれば、待受時に自
動電力制御回路を流れる電流は非常に小さくなるので、
電源の電池の放電時間を遅くすることが出来る効果があ
る。As explained in detail above, according to the present invention, the current flowing through the automatic power control circuit during standby becomes very small.
This has the effect of slowing down the discharge time of the power supply battery.
第１図は本発明の原理回路図、
第２図は本発明の実施例の自動電力制御回路の回路図、
第３図は従来例の自動電力制御回路の回路図である。
図において、
■は送信電力増幅器、
２は送信電力調整部、
３は電圧検出部、
４は自動電圧調整器、
Ｔｌ、Ｔ２．Ｔ４〜Ｔ６はトランジスタ、Ｔ３．Ｔ７は
スイッチングトランジスタ、Ｒ１−ＲＩＯは抵抗、
■は電源、
ＣＩ、Ｃ２はコンデンサを示す。
未発Ｆｌｅａ原理１回路にFIG. 1 is a circuit diagram of the principle of the present invention, FIG. 2 is a circuit diagram of an automatic power control circuit according to an embodiment of the present invention, and FIG. 3 is a circuit diagram of a conventional automatic power control circuit. In the figure, (2) is a transmission power amplifier, 2 is a transmission power adjustment section, 3 is a voltage detection section, 4 is an automatic voltage regulator, Tl, T2. T4 to T6 are transistors, T3. T7 is a switching transistor, R1-RIO is a resistor, (2) is a power supply, and CI and C2 are capacitors. Unreleased Flea principle 1 circuit
Claims (1)
第２のトランジスタ（Ｔ２）のエミッタを第１の抵抗（
Ｒ１）に接続し、 該第１のトランジスタ（Ｔ１）のコレクタを、送信電力
増幅器（１）の、電流の大小により送信電力を調整する
送信電力調整部（２）に接続し、ベースには基準電圧を
与え、 該第２のトランジスタ（Ｔ２）のコレクタを、電源（Ｖ
）に接続し、ベースには該送信電力増幅器（１）の出力
電圧を電圧検出部（３）を介して与え、該送信電力増幅
器（１）の送信電力を自動的に一定にする自動電力制御
回路において、 該第１の抵抗（Ｒ１）とアース間に第２の抵抗（Ｒ２）
及び動作時、待受時にオンオフするスイッチングトラン
ジスタ（Ｔ３）を挿入したことを特徴とする自動電力制
御回路。[Claims] The emitters of the first transistor (T1) and the second transistor (T2) constituting the differential amplifier are connected to the first resistor (
R1), and the collector of the first transistor (T1) is connected to the transmission power adjustment section (2) of the transmission power amplifier (1), which adjusts the transmission power according to the magnitude of the current, and the base has a reference A voltage is applied, and the collector of the second transistor (T2) is connected to the power supply (V
), the output voltage of the transmission power amplifier (1) is applied to the base via the voltage detection section (3), and automatic power control automatically keeps the transmission power of the transmission power amplifier (1) constant. In the circuit, a second resistor (R2) is connected between the first resistor (R1) and ground.
and an automatic power control circuit characterized by inserting a switching transistor (T3) that turns on and off during operation and standby.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6013288A JPH01233814A (en) | 1988-03-14 | 1988-03-14 | Automatic power control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6013288A JPH01233814A (en) | 1988-03-14 | 1988-03-14 | Automatic power control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01233814A true JPH01233814A (en) | 1989-09-19 |
Family
ID=13133304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6013288A Pending JPH01233814A (en) | 1988-03-14 | 1988-03-14 | Automatic power control circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01233814A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5296570A (en) * | 1976-02-09 | 1977-08-13 | Citizen Watch Co Ltd | Power saving method of crystal wristwatch |
| JPS591244B2 (en) * | 1978-06-23 | 1984-01-11 | 三菱レイヨン株式会社 | Method for producing methacrolein, methacrylic acid and 1,3↓-butadiene |
| JPS6022016B2 (en) * | 1982-07-05 | 1985-05-30 | 三井化学株式会社 | Thermoplastic elastomer composition |
-
1988
- 1988-03-14 JP JP6013288A patent/JPH01233814A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5296570A (en) * | 1976-02-09 | 1977-08-13 | Citizen Watch Co Ltd | Power saving method of crystal wristwatch |
| JPS591244B2 (en) * | 1978-06-23 | 1984-01-11 | 三菱レイヨン株式会社 | Method for producing methacrolein, methacrylic acid and 1,3↓-butadiene |
| JPS6022016B2 (en) * | 1982-07-05 | 1985-05-30 | 三井化学株式会社 | Thermoplastic elastomer composition |
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