JPS6324570B2 - - Google Patents
Info
- Publication number
- JPS6324570B2 JPS6324570B2 JP57010506A JP1050682A JPS6324570B2 JP S6324570 B2 JPS6324570 B2 JP S6324570B2 JP 57010506 A JP57010506 A JP 57010506A JP 1050682 A JP1050682 A JP 1050682A JP S6324570 B2 JPS6324570 B2 JP S6324570B2
- Authority
- JP
- Japan
- Prior art keywords
- transmission
- temperature
- amplifier
- transmitter
- output level
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3036—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers
- H03G3/3042—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers in modulators, frequency-changers, transmitters or power amplifiers
Landscapes
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Transmitters (AREA)
Description
【発明の詳細な説明】
この発明は送信部の温度上昇を制限し、装置の
信頼度を高める通信装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a communication device that limits the temperature rise of a transmitter and increases the reliability of the device.
第１図は従来の移動通信装置を示すブロツク図
である。同図において、１は送信データを変調す
る変調器、２はこの変調器１によつて変調された
送信信号を増幅する送信増幅器、３は方向性結合
器、４は基準電圧設定回路、５は方向性結合器３
の出力を検波する検波器、６は基準電圧設定回路
４で設定した基準電圧とこの検波器５で検出した
送信出力レベルとを比較する送信制御増幅器、７
は送信出力端子である。 FIG. 1 is a block diagram showing a conventional mobile communication device. In the figure, 1 is a modulator that modulates transmission data, 2 is a transmission amplifier that amplifies the transmission signal modulated by this modulator 1, 3 is a directional coupler, 4 is a reference voltage setting circuit, and 5 is a Directional coupler 3
6 is a transmission control amplifier that compares the reference voltage set by the reference voltage setting circuit 4 with the transmission output level detected by this detector 5; 7;
is the transmission output terminal.
次に、上記構成による移動通信装置の動作につ
いて簡単に説明する。まず、送信データは変調器
１で変調されたのち、送信増幅器２で増幅され
る。そして、この増幅された送信信号は方向性結
合器３を介して送信出力端子７から出力する。一
方、検波器５は方向性結合器３の出力を検波し、
送信出力レベルを送信制御増幅器６に出力する。
したがつて、この送信制御増幅器６は検波器５で
検出される送信出力レベルと基準電圧設定回路４
で設定された基準電圧とを比較し、その送信出力
レベルが常に基準電圧と等しくなるように送信増
幅器２の駆動電流を制御する。このため、筐体内
の温度上昇などによる送信増幅器２の利得変動な
どにもかかわらず、送信出力レベルを常に一定に
することができ、回線品質を一定に保持すること
ができる。 Next, the operation of the mobile communication device with the above configuration will be briefly explained. First, transmission data is modulated by a modulator 1 and then amplified by a transmission amplifier 2. Then, this amplified transmission signal is outputted from the transmission output terminal 7 via the directional coupler 3. On the other hand, the detector 5 detects the output of the directional coupler 3,
The transmission output level is output to the transmission control amplifier 6.
Therefore, this transmission control amplifier 6 is connected to the transmission output level detected by the wave detector 5 and the reference voltage setting circuit 4.
The drive current of the transmission amplifier 2 is controlled so that the transmission output level is always equal to the reference voltage. Therefore, even though the gain of the transmission amplifier 2 fluctuates due to a rise in temperature within the housing, etc., the transmission output level can always be kept constant, and the line quality can be kept constant.
しかしながら、従来の通信装置では小形化によ
り、放熱面積が制限されるため、長時間の連続送
信により、送信増幅器周辺の温度上昇が極めて高
くなり、装置の信頼度上問題となるなどの欠点が
あつた。 However, due to the miniaturization of conventional communication equipment, the heat dissipation area is limited, so continuous transmission over long periods of time causes an extremely high temperature rise around the transmitting amplifier, which poses problems for the reliability of the equipment. Ta.
したがつて、この発明の目的は送信部の温度上
昇が周囲温度に比べ一定値以上に達した場合、送
信増幅器の送信出力レベルを低下させて、温度上
昇を制限し、装置の信頼度を高めるようにした通
信装置を提供するものである。 Therefore, an object of the present invention is to reduce the transmission output level of the transmission amplifier when the temperature rise in the transmitting section reaches a certain value or more compared to the ambient temperature, thereby limiting the temperature rise and increasing the reliability of the device. The present invention provides a communication device as described above.
このような目的を達成するため、この発明は送
信増幅器を含む送信部の温度と周囲温度との温度
差が規定値より高い値になつたとき、送信制御増
幅器によつて送信増幅器の駆動電流を制限し、送
信出力レベルを規定値より低い値にするものであ
り、以下実施例を用いて詳細に説明する。 In order to achieve such an object, the present invention uses a transmission control amplifier to reduce the drive current of the transmission amplifier when the temperature difference between the temperature of the transmission section including the transmission amplifier and the ambient temperature becomes higher than a specified value. This is to limit the transmission output level to a value lower than the specified value, and will be explained in detail below using an example.
第２図はこの発明に係る通信装置の一実施例を
示すブロツク図である。同図において、３は送信
増幅器２の近辺に設置し、送信部の温度を検出す
るサーミスタなどの感熱素子を含む送信部温度検
出回路、９は送信増幅器２を含む送信部から離れ
た場所、例えば、筐体表面に設置し、周囲温度を
検出するサーミスタなどの感熱素子を含む周囲温
度検出回路、１０は送信部の温度と周囲温度との
温度差T0に対してVT0レベルの第１指示信号およ
び温度差T1（T1＞T0）に対してVT1レベルの第２
指示信号を出力する温度差設定回路、１１は送信
部の温度と周囲温度との温度差を算出し、その温
度差がT0のときにはVT0レベルの第１指示信号を
選択して出力し、その温度差がT1のときにはVT1
レベルの第２指示信号を選択して出力する比較増
幅回路、１２はこの比較増幅器１１の第１指示信
号が入力したときには基準電圧V0を出力し、第
２指示信号が入力したときには基準電圧V1を出
力する基準電圧設定回路、１３はこの基準電圧設
定回路１２から入力する基準電圧V0あるいはV1
と検波器５から入力する送信出力レベルとを比較
し、基準電圧V0が入力している場合には送信出
力レベルが規定値P0になるように送信増幅器２
の駆動電流を制御し、基準電圧V1が入力してい
る場合には送信出力レベルが規定値P0より低い
第２の規定値P1になるように送信増幅器２の駆
動電流を制御する送信制御増幅器である。 FIG. 2 is a block diagram showing one embodiment of a communication device according to the present invention. In the figure, reference numeral 3 denotes a transmitter temperature detection circuit that is installed near the transmitter amplifier 2 and includes a heat-sensitive element such as a thermistor for detecting the temperature of the transmitter, and 9 is a place away from the transmitter that includes the transmitter amplifier 2, e.g. , an ambient temperature detection circuit that is installed on the surface of the housing and includes a heat-sensitive element such as a thermistor that detects the ambient temperature; 10 is a first indication of the V T0 level for the temperature difference T 0 between the temperature of the transmitter and the ambient temperature; The second level of V T1 for signal and temperature difference T 1 (T 1 > T 0 )
A temperature difference setting circuit 11 that outputs an instruction signal calculates the temperature difference between the temperature of the transmitter and the ambient temperature, and when the temperature difference is T0 , selects and outputs a first instruction signal of V T0 level, When the temperature difference is T 1 , V T1
A comparison amplifier circuit 12 selects and outputs a second instruction signal of the level, and outputs a reference voltage V 0 when the first instruction signal of the comparison amplifier 11 is input, and a reference voltage V 0 when the second instruction signal is input. 1 is a reference voltage setting circuit that outputs 1, and 13 is a reference voltage V 0 or V 1 that is input from this reference voltage setting circuit 12.
and the transmission output level input from the wave detector 5, and if the reference voltage V 0 is input, the transmission amplifier 2 is set so that the transmission output level becomes the specified value P 0 .
and controls the drive current of the transmission amplifier 2 so that when the reference voltage V 1 is input, the transmission output level becomes a second specified value P 1 lower than the specified value P 0 . It is a control amplifier.
次に、上記構成による通信装置の動作について
第３図および第４図を参照して説明する。まず、
送信データは変調器１で変調されたのち、送信増
幅器２で増幅される。そして、この増幅された送
信信号は方向性結合器３を介して送信出力端子７
から出力する。一方、検波器５は方向性結合器３
の出力を検波し、送信出力レベルを送信制御増幅
器１３に出力する。したがつて、この送信制御増
幅器１３は検波器５から入力する送信出力レベル
と基準電圧設定回路１２から入力する基準電圧
（V0あるいはV1）とを比較し、その送信出力レベ
ルが基準電圧に等しくなるように送信増幅器２の
駆動電流を制御する。このため、送信出力レベル
を常に一定にすることができる。そして、送信部
温度検出器８で検出される送信部の温度と周囲温
度検出回路９で検出される周囲温度との温度差が
T0以下のときには比較増幅回路１１は温度差設
定回路１０から入力するTT0レベルの第１指示信
号を選択して出力する。このため、基準電圧設定
回路１２はこの第１指示信号の入力によつて動作
し、対応する基準電圧V0を出力する。したがつ
て、上述したように、送信制御増幅器１３は送信
出力レベルが規定値P0（第３図参照）になるよう
に送信増幅器２の駆動電流を制御する。 Next, the operation of the communication device with the above configuration will be explained with reference to FIGS. 3 and 4. first,
Transmission data is modulated by a modulator 1 and then amplified by a transmission amplifier 2. This amplified transmission signal is then passed through the directional coupler 3 to the transmission output terminal 7.
Output from. On the other hand, the detector 5 is connected to the directional coupler 3
The output of the transmitter 13 is detected and the transmitter output level is output to the transmitter control amplifier 13. Therefore, the transmission control amplifier 13 compares the transmission output level input from the detector 5 with the reference voltage (V 0 or V 1 ) input from the reference voltage setting circuit 12, and determines whether the transmission output level is equal to the reference voltage. The drive current of the transmission amplifier 2 is controlled so as to be equal to each other. Therefore, the transmission output level can always be kept constant. Then, the temperature difference between the temperature of the transmitter detected by the transmitter temperature detector 8 and the ambient temperature detected by the ambient temperature detection circuit 9 is determined.
When the temperature is below T 0 , the comparison amplifier circuit 11 selects and outputs the first instruction signal at the T T0 level input from the temperature difference setting circuit 10 . Therefore, the reference voltage setting circuit 12 operates in response to the input of this first instruction signal, and outputs the corresponding reference voltage V 0 . Therefore, as described above, the transmission control amplifier 13 controls the drive current of the transmission amplifier 2 so that the transmission output level becomes the specified value P 0 (see FIG. 3).
次に、長時間にわたり通信を継続すると、送信
増幅器２を含む送信部の温度が上昇する。このた
め、送信部温度検出器８で検出される送信部の温
度と周囲温度検出回路９で検出される周囲温度と
の温度差が第４図に示すようにT1（T1＞T0）に
なつたとき、比較増幅回路１１は温度差設定回路
１０から出力するVT1レベルの第２指示信号を選
択して出力する。このため、基準電圧設定回路１
２はこの第２指示信号の入力によつて動作し、対
応する基準電圧V1を出力する。したがつて、上
述したように、送信制御増幅器１３はこの基準電
圧V1の入力により、送信出力レベルを規定値P0
より低い第２の規定値P1（第３図参照）になるよ
うに送信増幅器２の駆動電流を制御する。このた
め、送信部の温度が第４図に示すように徐々に下
降し、再び温度差T0になり、送信出力レベルも
規定値P0にもどる。なお、この第２の規定値は
P1は定常時よりは低下してはいるが、送信品質
を十分維持できる程度の大きさに設定されてい
る。 Next, when communication continues for a long time, the temperature of the transmitting section including the transmitting amplifier 2 increases. Therefore, the temperature difference between the temperature of the transmitter detected by the transmitter temperature detector 8 and the ambient temperature detected by the ambient temperature detection circuit 9 is T 1 (T 1 >T 0 ) as shown in FIG. , the comparison amplifier circuit 11 selects and outputs the second instruction signal at the V T1 level output from the temperature difference setting circuit 10. Therefore, the reference voltage setting circuit 1
2 operates in response to the input of this second instruction signal and outputs the corresponding reference voltage V1 . Therefore, as described above, the transmission control amplifier 13 adjusts the transmission output level to the specified value P 0 by inputting this reference voltage V 1 .
The drive current of the transmission amplifier 2 is controlled so as to have a lower second specified value P 1 (see FIG. 3). Therefore, the temperature of the transmitter gradually decreases as shown in FIG. 4, and the temperature difference becomes T 0 again, and the transmission output level also returns to the specified value P 0 . Note that this second specified value is
Although P 1 is lower than in the steady state, it is set to a size that can sufficiently maintain transmission quality.
以上詳細に説明したように、この発明に係る通
信装置によれば送信部の通電による温度上昇を規
定値以下に制限できるため、装置の信頼度を高め
ることができる効果がある。さらに、送信部の温
度と周囲温度の差に応じて制御しているので、送
信部の通電電流に基づく温度上昇だけが検出で
き、より制度の高い制御が可能となる。 As described in detail above, according to the communication device according to the present invention, the temperature rise due to energization of the transmitting section can be limited to a specified value or less, so that the reliability of the device can be improved. Furthermore, since the control is performed according to the difference between the temperature of the transmitting section and the ambient temperature, only the temperature rise based on the current flowing through the transmitting section can be detected, making it possible to perform more precise control.
第１図は従来の移動通信装置を示すブロツク
図、第２図はこの発明に係る通信装置の一実施例
を示すブロツク図、第３図は第２図における温度
差と送信出力レベルとの関係を示す図、第４図は
第２図における送信部の温度差の時間経過を示す
図である。
１……変調器、２……送信増幅器、３……方向
性結合器、４……基準電圧設定回路、５……検波
器、６……送信制御増幅器、７……送信出力端
子、８……送信部温度検出回路、９……周囲温度
検出回路、１０……温度差設定回路、１１……比
較増幅回路、１２……基準電圧設定回路、１３…
…送信制御増幅器。なお、図中、同一符号は同一
または相当部分を示す。
Fig. 1 is a block diagram showing a conventional mobile communication device, Fig. 2 is a block diagram showing an embodiment of the communication device according to the present invention, and Fig. 3 is the relationship between the temperature difference and the transmission output level in Fig. 2. FIG. 4 is a diagram showing the temperature difference of the transmitter in FIG. 2 over time. DESCRIPTION OF SYMBOLS 1... Modulator, 2... Transmission amplifier, 3... Directional coupler, 4... Reference voltage setting circuit, 5... Detector, 6... Transmission control amplifier, 7... Transmission output terminal, 8... ...Transmission section temperature detection circuit, 9...Ambient temperature detection circuit, 10...Temperature difference setting circuit, 11...Comparison amplifier circuit, 12...Reference voltage setting circuit, 13...
...Transmission control amplifier. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.
Claims (1)
増幅器と、送信出力レベルを検出する検出器と、
送信部の温度を検出する送信部温度検出器と、周
囲の温度を検出する周囲温度検出器と、送信部の
温度と周囲温度の各信号を入力し、この温度差が
第１のレベル以下のときは第１指示信号を出力
し、第１レベルより大きい第２のレベルになつた
ときは第２指示信号を出力する手段と、送信出力
レベルおよび第１指示信号または第２指示信号を
入力して比較し、第１指示信号が入力されている
ときは送信出力レベルが第１の規定値になるよう
に送信増幅器を制御するとともに、第２指示信号
が入力されているときは送信出力レベルが第１の
規定値より小さい第２の規定値になるように送信
増幅器を制御する手段とを備えたことを特徴とす
る通信装置。1 a transmission amplifier that amplifies the transmission signal and sends out the transmission output; a detector that detects the transmission output level;
A transmitter temperature detector detects the temperature of the transmitter, an ambient temperature detector detects the surrounding temperature, and each signal of the transmitter temperature and ambient temperature is input, and the temperature difference is below the first level. means for outputting a first instruction signal when the signal reaches a second level greater than the first level; and means for inputting the transmission output level and the first instruction signal or the second instruction signal. When the first instruction signal is input, the transmission amplifier is controlled so that the transmission output level becomes the first specified value, and when the second instruction signal is input, the transmission output level is A communication device comprising: means for controlling a transmission amplifier so that the second specified value is smaller than the first specified value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1050682A JPS58127434A (en) | 1982-01-25 | 1982-01-25 | Communication equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1050682A JPS58127434A (en) | 1982-01-25 | 1982-01-25 | Communication equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58127434A JPS58127434A (en) | 1983-07-29 |
| JPS6324570B2 true JPS6324570B2 (en) | 1988-05-21 |
Family
ID=11752089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1050682A Granted JPS58127434A (en) | 1982-01-25 | 1982-01-25 | Communication equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58127434A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60150833U (en) * | 1984-03-19 | 1985-10-07 | 株式会社ケンウッド | transmitter |
| JPS6271930U (en) * | 1985-10-25 | 1987-05-08 | ||
| JPS62203429A (en) * | 1986-03-04 | 1987-09-08 | Nec Corp | Transmission power control circuit |
| JPH0758922B2 (en) * | 1986-08-25 | 1995-06-21 | 株式会社日立製作所 | Temperature rise warning device |
| JPH07114382B2 (en) * | 1986-11-18 | 1995-12-06 | 日本電気株式会社 | In-vehicle adapter for portable radios |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5025421Y2 (en) * | 1971-02-18 | 1975-07-30 | ||
| JPS5510252A (en) * | 1978-07-10 | 1980-01-24 | Kanda Tsushin Kogyo Kk | Transmission output control circuit |
| JPS5887923A (en) * | 1981-11-19 | 1983-05-25 | Mitsubishi Electric Corp | Transmission controller |
-
1982
- 1982-01-25 JP JP1050682A patent/JPS58127434A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58127434A (en) | 1983-07-29 |
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