JPS63121330A - Transmission performance monitor circuit of radio equipment - Google Patents
Transmission performance monitor circuit of radio equipmentInfo
- Publication number
- JPS63121330A JPS63121330A JP61266659A JP26665986A JPS63121330A JP S63121330 A JPS63121330 A JP S63121330A JP 61266659 A JP61266659 A JP 61266659A JP 26665986 A JP26665986 A JP 26665986A JP S63121330 A JPS63121330 A JP S63121330A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- high frequency
- temperature
- transmission
- diode
- 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 36
- 238000012544 monitoring process Methods 0.000 claims description 7
- 238000001514 detection method Methods 0.000 abstract description 12
- 230000004075 alteration Effects 0.000 abstract 3
- 230000006641 stabilisation Effects 0.000 abstract 1
- 238000011105 stabilization Methods 0.000 abstract 1
- 239000003990 capacitor Substances 0.000 description 5
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000007257 malfunction Effects 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Landscapes
- Monitoring And Testing Of Transmission In General (AREA)
- Transmitters (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
、不発明は無線装置の送信動作監視回路、特に送信出力
端子における高周波出力の有無を検出する送信動作監視
回路に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a transmission operation monitoring circuit for a wireless device, and particularly to a transmission operation monitoring circuit for detecting the presence or absence of high frequency output at a transmission output terminal.
一般に、この種の送信動作監視回路は送信をオフしてい
るにもかかわらず電波を発射してしまったシ、送信をオ
ンしているにもかかわらず電波が出ていないなどという
ような異常を検出することにより不要電波の発射を防止
したり、無線機の故障を早期に発見する目的で設けられ
ている。Generally, this type of transmission operation monitoring circuit detects abnormalities such as radio waves being emitted even though transmission is off, or no radio waves being emitted even though transmission is on. This detection is intended to prevent the emission of unnecessary radio waves and to detect malfunctions of radio equipment at an early stage.
従来のむの種の回路を第３図に示す。この回路において
、１は送信出力端子、３は送信電力増幅部、４は高周波
検出コンデンサ、１１は検波用ダイオード、１８は電圧
比較器、１９は高周波出力の有無の識別出力端子である
。A conventional muno-tane circuit is shown in FIG. In this circuit, 1 is a transmission output terminal, 3 is a transmission power amplification section, 4 is a high frequency detection capacitor, 11 is a detection diode, 18 is a voltage comparator, and 19 is an output terminal for identifying the presence or absence of high frequency output.
以下第３図の回路の動作を簡単に説明する。端子１に現
われた高周波電圧の一部はダイオード１１により検波さ
れて直流電圧を発生する。いま。The operation of the circuit shown in FIG. 3 will be briefly explained below. A portion of the high frequency voltage appearing at the terminal 1 is detected by the diode 11 to generate a DC voltage. now.
端子１７の電圧を■Ｄ２とすると、高周波が存在する時
は
■Ｄ２＝ｖＤ１＋ｖＲ１
となる。ここで、ＶＤ、は電源端子５から流れこむ直流
バイアス電流によって生ずる電圧、■８．は高周波検波
電圧である。一方、送信オフ時には端子２に高周波電圧
が存在しないため、検波電圧ｖ、、＝Ｑとなシ、端子１
７の電圧はＶＤ、になる。Assuming that the voltage at the terminal 17 is ■D2, when a high frequency is present, ■D2=vD1+vR1. Here, VD is the voltage generated by the DC bias current flowing from the power supply terminal 5; is the high frequency detection voltage. On the other hand, when transmission is off, there is no high-frequency voltage at terminal 2, so the detected voltage v, , = Q, and terminal 1
The voltage at point 7 becomes VD.
また、端子２４には電源ｖ２へ通じる端子２２の電圧を
抵抗分割することにより電圧ｖＤ３が得られる。Further, a voltage vD3 is obtained at the terminal 24 by resistance-dividing the voltage at the terminal 22 connected to the power supply v2.
端子１７．２２がそれぞれ電圧比較器１８の正相入力、
逆相入力へ接続されているので、端子１９にはＶＤ２と
ｖＤ３０大小比ｔｆｌ Ｋ ヨ’） 、 Ｈ（Ｈｉｇｈ
） 。Terminals 17 and 22 are positive phase inputs of the voltage comparator 18, respectively;
Since it is connected to the negative phase input, terminal 19 has the VD2 and vD30 magnitude ratio tfl K YO'), H (High
).
Ｌ （Ｌｏｗ）レベルが出力される。すなわち、抵抗２
３．２５の分圧比を適切に選んで。L (Low) level is output. That is, resistance 2
Choose a partial pressure ratio of 3.25 appropriately.
ＶＤ１＜ＶＤ３＜ＶＤ２
となるように設定すれば、送信オフ時にはＬレベル、送
信オン時にはＨレベルが出力端子１９に得られる。By setting VD1<VD3<VD2, an L level is obtained at the output terminal 19 when transmission is off, and an H level is obtained at the output terminal 19 when transmission is on.
第３図において、ダイオード１２およびその周辺回路は
ダイオード１１の温度補償回路であり。In FIG. 3, the diode 12 and its peripheral circuit are a temperature compensation circuit for the diode 11.
ＶＤ２の温度による変動を少なくするためのものである
。端子５は電圧Ｖ、の直流電源に接続され、抵抗６を介
してダイオード１１．１２にＫｍバイアスを供給してい
る。９は高周波チョークコイル。This is to reduce fluctuations in VD2 due to temperature. Terminal 5 is connected to a DC power supply with voltage V, and supplies Km bias to diodes 11 and 12 via resistor 6. 9 is a high frequency choke coil.
８は高周波パイｉ４スコンデンサである。ここで。8 is a high frequency piston capacitor. here.
ダイオード１１へ直流バイアスを与えているのは。What gives the diode 11 a DC bias?
送信電力増幅部３において送信出力電力を一定に保つた
めの自動利得制御回路の高周波出力検出電圧としても端
子１７の電圧を利用することが多いが、その際に低い送
信出力でも直線性良く検波電圧を得るためである。また
、高周波電圧の検出にコンデンサ４を用いているが、他
の高周波結合回路を用いても動作は同じである。The voltage at the terminal 17 is often used as the high frequency output detection voltage of the automatic gain control circuit to keep the transmission output power constant in the transmission power amplification section 3. This is to obtain. Further, although the capacitor 4 is used to detect the high frequency voltage, the operation is the same even if other high frequency coupling circuits are used.
上述した従来の送信動作監視回路は、扱う高周波電力が
大きく、大きな検波電圧が得られる場合゛には問題ない
が、高周波出力電力が小さくなシ。The above-mentioned conventional transmission operation monitoring circuit has no problem if the high frequency power it handles is large and a large detected voltage can be obtained, but if the high frequency output power is small.
大きな検波電圧が得られない場合には、送信オン時とオ
フ時の検波電圧の差が小さくなって、温度によっては回
路が誤動作する可能性がある。すなわち、電圧比較器の
基準電圧ＶＤ、が一定であっても、送信オン時の検波電
圧ｖＤ２と送信オフ時の電圧ＶＤ、との差が小さいため
に。If a large detected voltage cannot be obtained, the difference between the detected voltage when the transmission is on and when the transmission is off becomes small, and the circuit may malfunction depending on the temperature. That is, even if the reference voltage VD of the voltage comparator is constant, the difference between the detected voltage vD2 when transmission is on and the voltage VD when transmission is off is small.
ＶＤ１＜ＶＤ５＜ＶＤ２
の条件を満たすＶＤ３の範囲が狭く、ダイオード特性の
温度変化によ！＋ ｖｏｆ ＞ ｖＤｆｆとなりて送信
オフ時にもかかわらず高周波出力電力と判断してしまう
ことになる。同様に、 ＶＤ５ ＞ ＶＤ２となって送
信オン時にもかかわらず高周波出力無しと判断してしま
う現象が起り得るという問題点がある。The range of VD3 that satisfies the condition of VD1<VD5<VD2 is narrow and due to temperature changes in diode characteristics! + vof > vDff, and the output power is determined to be high frequency output power even though the transmission is off. Similarly, there is a problem that VD5 > VD2 and a phenomenon may occur in which it is determined that there is no high frequency output even though transmission is on.
勿論、そのような誤動作を防ぐために温度補償回路が備
わっているが、それはあくまでも温度によるＶＤ１．
Ｖ□の変化を軽減する程度のものであり１回路定数のば
らつきを含め、広い温度範囲にわたりて根本的に誤動作
をなくすためのものではない。更に基準電圧となるＶＤ
５も電圧安定化回路の温度係数により事実上変動する。Of course, a temperature compensation circuit is provided to prevent such malfunctions, but this only applies to VD1.
This is only to reduce the change in V□, and is not intended to fundamentally eliminate malfunctions over a wide temperature range, including variations in circuit constants. Furthermore, VD which becomes the reference voltage
5 also effectively varies depending on the temperature coefficient of the voltage stabilizing circuit.
このように。in this way.
従来の回路では広い温度範囲にわたりて小さな高周波出
力電力をも確実に検出することは困難であった。With conventional circuits, it is difficult to reliably detect even small high-frequency output power over a wide temperature range.
本発明は従来のもののこのような問題点を解決し、低い
高周波出力電力でも広い温度範囲にわたシ正確に送信高
周波出力の有無を識別できるようにしたものである。The present invention solves these problems of the conventional devices and makes it possible to accurately identify the presence or absence of transmitted high-frequency output over a wide temperature range even with low high-frequency output power.
本発明によれば、無線装置の送信出力端の高周波電圧を
検出してその送信動作を監視する回路において、前記高
周波電圧を検波するために設けられ、直流バイアス電流
の流れる第１のダイオードと、該第１のダイオードを温
度補償するために設けられ、直流バイアス電流の流れる
第２のダイオ ・−ドとを有し、前記第１のダイオー
ドの為予電圧と第２のダイオードの端子電圧の差によっ
て前記高周波電圧の存在を判定することを特徴とする無
線装置の送信動作監視回路が得られる。According to the present invention, in a circuit that detects a high frequency voltage at a transmission output end of a wireless device and monitors its transmission operation, a first diode provided for detecting the high frequency voltage and through which a DC bias current flows; a second diode provided to temperature compensate the first diode and through which a DC bias current flows, the difference between the prevoltage of the first diode and the terminal voltage of the second diode; A transmission operation monitoring circuit for a wireless device is obtained, which is characterized in that it determines the presence of the high-frequency voltage.
すなわち本発明による送信動作監視回路は、従来温度補
償されていない電圧比較器の基準電圧も温度補償しよう
というものである。この場合の温度補償とは基準電圧ｖ
Ｄ３を温度によらず一定に保つのが目的ではなく、基準
電圧ｖＤ５と送信オン時の検波電圧ｖＤ２との差（ｖ、
）２−ＶＤ、）や送信オフ時の検波電圧ＶＤ、との差（
ＶＤ、−ｖＤ、）を一定に保つのが目的である。例えば
、検波電圧が正の温度係数を持つ場合１ ｖＤ５の温度
変化を第４図のように温度補償するものである。That is, the transmission operation monitoring circuit according to the present invention is intended to compensate for the temperature of the reference voltage of the voltage comparator, which has not been temperature compensated in the past. Temperature compensation in this case is the reference voltage v
The purpose is not to keep D3 constant regardless of temperature, but to maintain the difference (v,
)2-VD, ) and the detection voltage VD when transmission is off (
The purpose is to keep VD, -vD, ) constant. For example, when the detected voltage has a positive temperature coefficient, a temperature change of 1 vD5 is compensated for as shown in FIG.
一般に、Ｖ、ＶＤ２が温度で変動する主な原因はダイオ
ードの特性の温度による変化である。よって、従来はダ
イオードを一つ追加してＶＤｌ、ＶＤｌの温度変動を補
償していたが１本発明ではそのダイオードを用いてＶ
もｖ 、■ と同じようなり５ ＤＩ
Ｄ２温度係数をもつように補償するものである。Generally, the main reason why V and VD2 fluctuate with temperature is a change in diode characteristics due to temperature. Therefore, in the past, one diode was added to compensate for temperature fluctuations in VDl and VDl, but in the present invention, the diode is used to compensate for temperature fluctuations in VDl and VDl.
5 DI is the same as v and ■.
This is to compensate to have a D2 temperature coefficient.
次に１本発明について図面を参照して説明する。 Next, one embodiment of the present invention will be explained with reference to the drawings.
第１図は本発明の一実施例の回路図である。この例によ
れば、電圧比較器１８の基単電圧ＶＤ３は抵抗分割では
なく、ダイオード１２の端子１３から得られる。端子１
３から得られる基鵡電圧ｖＤ３はダイオード１１．１２
に同一品種を使用することにより送信オン時の検波電圧
ｖＤ２や送信オフ時の検波電圧ＶＤ、と同様な温度変化
を示し、ある温度で
ＶＤｌ＜ｖＤ３＜ＶＤｌ
となるように抵抗１４の抵抗値を定めれば、少ない高周
波送信出力に対しても、広い温度範囲に対しても第４図
のような温度変化が得られる。FIG. 1 is a circuit diagram of an embodiment of the present invention. According to this example, the base voltage VD3 of the voltage comparator 18 is obtained from the terminal 13 of the diode 12 rather than by resistance division. Terminal 1
The basic voltage vD3 obtained from 3 is the diode 11.12
By using the same type of resistor 14, the resistance value of the resistor 14 can be adjusted so that the detected voltage vD2 when transmitting is on and the detected voltage VD when transmitting is off exhibits the same temperature change, and VDl<vD3<VDl at a certain temperature. If determined, the temperature change as shown in FIG. 4 can be obtained even for a small high frequency transmission output and for a wide temperature range.
また、基単電圧も検波電圧も同一の電源端子５よシ補償
されているので、電源Ｖ、の電圧安定化回路の温度変化
にも影響を受けにくい構成である。Further, since both the base voltage and the detected voltage are compensated by the same power supply terminal 5, the configuration is not easily affected by temperature changes in the voltage stabilizing circuit of the power supply V.
第２図は高周波の結合回路として第１図のようなコンデ
ンサ結合ではなく、伝送線路２１による高周波結合回路
を用いた場合の実施列である。また、ダイオード１１．
１２の向きが第１図の例とは逆であるが、これは端子５
を負電源へ接続することを意味する。すなわち、この場
合、端子１７に表われる送信オン時の電圧ｖＤ２．送信
オフ時の電圧ｖＤＩ ＃端子１３０基準電圧ｖＤ５のそ
れぞれの関係は
ＶＤｌ〉■Ｄ５〉ＶＤｌ
となるが、動作原理は第１図の場合と同じである。FIG. 2 shows an example in which a high-frequency coupling circuit using a transmission line 21 is used instead of a capacitor coupling as shown in FIG. 1 as a high-frequency coupling circuit. In addition, the diode 11.
Although the direction of terminal 12 is opposite to that in the example shown in FIG.
This means connecting to the negative power supply. That is, in this case, the voltage vD2. appearing at the terminal 17 when the transmission is turned on. The relationship between the voltage vDI when the transmission is off and the reference voltage vD5 of the # terminal 130 is VDl>D5>VDl, but the operating principle is the same as in the case of FIG.
以上説明したように１本発明によれば、高周波検波電圧
と基単電圧の両方を温度補償して電圧比較器へ入力させ
ることによシ、低い高周波出力電力でも、広い温度範囲
にわたシ正確に送信高周波出力の有無を識別することが
できるという効果がある。As explained above, according to the present invention, by temperature-compensating both the high-frequency detection voltage and the base single voltage and inputting them to the voltage comparator, even low high-frequency output power can be accurately maintained over a wide temperature range. This has the effect of being able to identify the presence or absence of a transmitted high-frequency output.
【図面の簡単な説明】
第１図は本発明の第１の実施例を示す回路図。
第２図は本発明の第２の実施例を示す回路図、第３図は
従来技術による回路図、第４図は検波電圧および基単電
圧の温度特性の例を示すグラフである。
図において、１は高周波出力端子、２，７゜１０．１３
，１７．２２．２４は端子、３は高周波電力増幅部、４
．８．１５はコンデンサ、５は電源端子、６，１４，１
６，２０，２３．２５は抵抗、９はチョークコイル、１
１．１２はダイオード、１８は電圧比較器、１９は検出
出力端子。
２１は伝送線路である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit diagram showing a first embodiment of the present invention. FIG. 2 is a circuit diagram showing a second embodiment of the present invention, FIG. 3 is a circuit diagram according to the prior art, and FIG. 4 is a graph showing an example of the temperature characteristics of the detected voltage and the base voltage. In the figure, 1 is a high frequency output terminal, 2,7°10.13
, 17.22.24 are terminals, 3 is a high frequency power amplification section, 4
．． 8.15 is a capacitor, 5 is a power supply terminal, 6, 14, 1
6, 20, 23.25 are resistors, 9 is choke coil, 1
1.12 is a diode, 18 is a voltage comparator, and 19 is a detection output terminal. 21 is a transmission line.
Claims (1)
送信動作を監視する回路において、前記高周波電圧を検
波するために設けられ、直流バイアス電流の流れる第１
のダイオードと、該第１のダイオードを温度補償するた
めに設けられ、直流バイアス電流の流れる第２のダイオ
ードとを有し、前記第１のダイオードの端子電圧と第２
のダイオードの端子電圧の差によって前記高周波電圧の
存在を判定することを特徴とする無線装置の送信動作監
視回路。1. In a circuit that detects a high frequency voltage at the transmission output end of a wireless device and monitors its transmission operation, a first circuit is provided to detect the high frequency voltage and through which a DC bias current flows.
and a second diode provided for temperature compensating the first diode and through which a DC bias current flows, the terminal voltage of the first diode and the second diode are provided to compensate for the temperature of the first diode.
A transmission operation monitoring circuit for a wireless device, characterized in that the presence of the high frequency voltage is determined based on a difference in terminal voltage of a diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61266659A JPH0630473B2 (en) | 1986-11-11 | 1986-11-11 | Radio device transmission operation monitoring circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61266659A JPH0630473B2 (en) | 1986-11-11 | 1986-11-11 | Radio device transmission operation monitoring circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63121330A true JPS63121330A (en) | 1988-05-25 |
| JPH0630473B2 JPH0630473B2 (en) | 1994-04-20 |
Family
ID=17433902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61266659A Expired - Lifetime JPH0630473B2 (en) | 1986-11-11 | 1986-11-11 | Radio device transmission operation monitoring circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0630473B2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5240184A (en) * | 1975-09-25 | 1977-03-28 | Automob Antipollut & Saf Res Center | Temperature compensation circuit for pressure transducers |
| JPS57154919A (en) * | 1981-03-20 | 1982-09-24 | Hitachi Denshi Ltd | Detecting system for high frequency faulty power level |
| JPS61102577A (en) * | 1984-10-25 | 1986-05-21 | Matsushita Electric Works Ltd | Photoelectric switch for distance detection |
-
1986
- 1986-11-11 JP JP61266659A patent/JPH0630473B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5240184A (en) * | 1975-09-25 | 1977-03-28 | Automob Antipollut & Saf Res Center | Temperature compensation circuit for pressure transducers |
| JPS57154919A (en) * | 1981-03-20 | 1982-09-24 | Hitachi Denshi Ltd | Detecting system for high frequency faulty power level |
| JPS61102577A (en) * | 1984-10-25 | 1986-05-21 | Matsushita Electric Works Ltd | Photoelectric switch for distance detection |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0630473B2 (en) | 1994-04-20 |
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