JPS5917731A - Noise control circuit - Google Patents
Noise control circuitInfo
- Publication number
- JPS5917731A JPS5917731A JP12870982A JP12870982A JPS5917731A JP S5917731 A JPS5917731 A JP S5917731A JP 12870982 A JP12870982 A JP 12870982A JP 12870982 A JP12870982 A JP 12870982A JP S5917731 A JPS5917731 A JP S5917731A
- Authority
- JP
- Japan
- Prior art keywords
- amplifier
- noise
- voltage
- amplified
- low frequency
- 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 abstract description 18
- 238000010586 diagram Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
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
- H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems
- H03G3/344—Muting responsive to the amount of noise (noise squelch)
Landscapes
- Control Of Amplification And Gain Control (AREA)
- Noise Elimination (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、１台のＦＭ波無線装置を遠隔制御装置から
制御する無線システムにおいて、遠隔制御装置から受信
出力の雑音を制御する雑音制御回路に関するものである
。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a noise control circuit that controls noise in a received output from a remote control device in a wireless system in which one FM wave radio device is controlled from a remote control device.
３・１図は従来の雑音制御回路の１例を示すブロック結
線図であり、図において（１）は無線装置、（２）は受
信したＦＭ波信号を復調する周波数弁別器、（３）はこ
の周波数弁別器の出力を増幅する低周波増幅器、（４）
は周波数弁別器（２）の出力から雑音成分を取り出し増
幅する雑音増幅器、（５）はこの雑音増幅器の出力を検
波増幅し＋Ｎｉ電圧に変換しその出力で低周波増幅器（
３）を制御する１亘流増幅器、（６）は変調信号増幅器
、（力は送受切換器、（８）は無線装置（１）の入出力
と伝送線路（９）との整合をとるためのインピータンス
整合トランス、００）は遠隔制御装置、Ｕυは伝送線路
（９）と遠隔制御装置００）との整合をとるためのイン
ピーダンス整合トランス、（１２＋は送受切換器、（１
３１は送信信号増幅器、■は低周波増幅器（３）からの
受信出力を増幅する低周波増幅器、０９は拡声器、（田
は雑音制御可変抵抗器、（１７）はこの雑音制御可変抵
抗器（１６１の設定レベルに応じて直流電圧を出力する
ための直流増幅器である。Figure 3.1 is a block wiring diagram showing an example of a conventional noise control circuit. In the figure, (1) is a wireless device, (2) is a frequency discriminator that demodulates the received FM wave signal, and (3) is a frequency discriminator that demodulates the received FM wave signal. a low frequency amplifier (4) that amplifies the output of this frequency discriminator;
is a noise amplifier that extracts and amplifies the noise component from the output of the frequency discriminator (2), and (5) detects and amplifies the output of this noise amplifier, converts it to +Ni voltage, and uses the output to drive the low frequency amplifier (
3), (6) is a modulation signal amplifier, (power is a transmitter/receiver switcher, and (8) is for matching the input/output of the wireless device (1) with the transmission line (9). Impedance matching transformer, 00) is a remote control device, Uυ is an impedance matching transformer for matching the transmission line (9) and remote control device 00), (12+ is a transmission/reception switch, (1
31 is a transmitting signal amplifier, ■ is a low frequency amplifier that amplifies the reception output from the low frequency amplifier (3), 09 is a loudspeaker, (1 is a noise control variable resistor, and (17) is this noise control variable resistor ( This is a DC amplifier for outputting DC voltage according to the set level of 161.
上記のよう（ニ構成された雑音制御回路においては、無
線装置（１＋により受信されたＦＭ受信信号は、高周波
増幅器、混合器、中間周波増幅器等（図では省略しであ
る）を経て、周波数弁別器（１）（二より復調される。In the noise control circuit configured as described above, the FM reception signal received by the wireless device (1+) passes through a high frequency amplifier, a mixer, an intermediate frequency amplifier, etc. (not shown in the figure), and undergoes frequency discrimination. Demodulated from device (1) (2).
復調された信号は低周波増幅器（３）により増幅された
後、送受切換器（力、インピーダンス整合トランス（８
）を経て伝送線路（９）に送出される。The demodulated signal is amplified by a low frequency amplifier (3), and then sent to a transmitter/receiver switcher (power) and an impedance matching transformer (8).
) to the transmission line (9).
この信号は遠隔制御装置（１０）で受信され、インピー
ダンス整合トランス旧）、送受切喚器圓を通り低周波増
幅器（１ａで増幅された後、拡声器０５）により音声に
変換され伝えられる。This signal is received by a remote control device (10), passes through an impedance matching transformer (formerly known as 10), a transmitter/receiver ring, and then is converted into audio by a low frequency amplifier (1a, then amplified by loudspeaker 05) and transmitted.
送４ｇ信号は送信信号増幅器（１３１により増幅され、
送受切換器（Ｉ２）、インピーダンス整合トランス旧）
、伝送線路（９）、インピーダンス整合トランス（８）
、送受切換器（７）、ｉｔ調信号増幅器（６）等を経て
送（ｇ回路（図では省略しである）からＦＭｌ；？号波
として送出される。The transmitted 4G signal is amplified by the transmitted signal amplifier (131,
Transmission/reception switch (I2), impedance matching transformer (old)
, transmission line (9), impedance matching transformer (8)
, a transmitter/receiver switcher (7), an IT signal amplifier (6), etc., and is then sent out as an FMl;? signal from the g circuit (not shown in the figure).
いま受信波がなくなった場合、又は受信波が微弱になっ
た場合には、周波数弁別器ｉｌ＋出力は、殆んど雑音成
分のみになるので周波数弁別器（１）出力のうち、雑音
成分を雑音増幅器（４）で増幅し、＠流増幅器（５）に
より直流電圧に変換した後低周波増幅器（３）を復調雑
音計に応じて断とするスケルチ動作を行なわせる。If the received wave is no longer present, or if the received wave has become weak, the frequency discriminator il+ output will almost always consist of noise components, so the noise component of the frequency discriminator (1) output will be replaced by noise. After the voltage is amplified by the amplifier (4) and converted into a DC voltage by the current amplifier (5), a squelch operation is performed in which the low frequency amplifier (3) is turned off according to the demodulation noise meter.
なおこの時スケルチ動作の動作点は遠隔制御装置の雑音
側ｒ１１４１ ｆｌｉ＋変抵抗器０６）によって行う。At this time, the operating point of the squelch operation is determined by the noise side r1141fli+resistance transformer 06) of the remote control device.
雑音制御可変抵抗器（１６１によって設定された直流電
圧は伝送線路（９）上で低周波信号に重畳され（又は独
立して）無線装置（Ｉ＋に送られ、雑音増幅器（４）又
は直流増幅器（５）の増幅度を制御する。The DC voltage set by the noise control variable resistor (161) is superimposed on the low-frequency signal on the transmission line (9) (or independently) and sent to the radio device (I+), where it is connected to the noise amplifier (4) or the DC amplifier ( 5) Control the degree of amplification.
従来の雑音制御回路は上記のように構成されていたので
、１台の遠隔制御装置（１０）からのみ無線装置（１）
の雑音制御が可能であり、複数の遠隔制御装置が並列に
接続された場合には、他の遠隔制御装置では、任意に雑
音制御レベルを設定（又は断）とすることができず、遠
隔制御装置の設置された場所それぞれの環境のもとて最
適な状態において通話をすることができないため、通信
の効率が下がるなどの欠点があった。Since the conventional noise control circuit is configured as described above, only one remote control device (10) can communicate with the wireless device (1).
When multiple remote control devices are connected in parallel, the noise control level cannot be set (or disconnected) arbitrarily with other remote control devices, and the remote control Since it is not possible to make a call under the optimal conditions depending on the environment of each location where the device is installed, there are drawbacks such as a decrease in communication efficiency.
この発明は上記のような従来の雑音制御回路の欠点を除
去する゛ためになされたもので、各装置を大形かつ複雑
化することなく、また伝送線路を増やすことなく、各遠
隔制御装置から各々独立に雑音制御ができる雑音制血１
回路を得ることを目的とするものである。This invention was made in order to eliminate the drawbacks of the conventional noise control circuits as described above. Noise control 1 where each noise can be controlled independently
The purpose is to obtain a circuit.
１・２図はこの発明の一実施例を示すブロック結線図で
あり、（１）〜（３）、（６）〜（１（Ｄは上記矛１図
の同一符号と同−又は相当部分を示すものである。Figures 1 and 2 are block wiring diagrams showing one embodiment of the present invention. It shows.
図において鋳は周波数弁別器（２）の出力から雑音１Ｊ
ｙ分を取り出し増幅する雑音増ｉ７ａ器、１２１１はこ
の雑音増幅器の出力を検波増幅し直流電圧に変換する直
流増幅器、図は複数の伝送線路１−〇、（乙３１、＋２
４４に低周波増幅器（３）及び直流増幅器（２【）の出
力を分配及び伝送線路（９）、μ）、例からの送信信号
を結合する制御増幅器、過）及び烈）はそれぞオを伝送
線路−）、咄との整合をとるためのインピーダンス１合
トランス、；ｚ７）は伝送線路（９）からの雑旨制御の
直流電圧を増幅し雑音制御可変抵抗器−の設定に応じて
低周波増幅器側を制御する直流増幅器、１２８）、＋２
９１はそれぞれ各局の遠隔制御装置である。In the figure, the noise is 1J from the output of the frequency discriminator (2).
1211 is a DC amplifier that detects and amplifies the output of this noise amplifier and converts it into DC voltage. The figure shows multiple transmission lines 1-0, (Otsu 31, +2
44, the outputs of the low frequency amplifier (3) and the DC amplifier (2) are distributed and the transmission lines (9), μ), the control amplifiers that combine the transmit signals from the example, The transmission line (9) is a 1-impedance transformer for matching with the transmission line (9); DC amplifier that controls the frequency amplifier side, 128), +2
Reference numeral 91 represents a remote control device for each station.
上記のように構成された雑音制御回路（二おいては、周
波数弁別器（２）で復調された受信信号は、低周波増幅
器（３）で増幅された後制御増幅器１２２）で分配され
伝送線路（９）、１２８１、・２４ｉに送り出される。The noise control circuit configured as described above (in the second part, the received signal demodulated by the frequency discriminator (2) is amplified by the low frequency amplifier (3) and then distributed by the control amplifier 122) and then distributed to the transmission line. (9), 1281, and 24i.
伝送線路（９）を伝送し、遠隔制御装置（１０）で受（
ｇされた信号は低周波増幅器ｔ１４１で増幅され、拡声
器（１って音声に変換される。The transmission line (9) transmits data and the remote control device (10) receives the data (
The g signal is amplified by a low frequency amplifier t141 and converted into sound by a loudspeaker (1).
受信波かない場合、あるいは倣弱な場合には、周波数弁
別器（２）の出力に雑音成分が多く、この雑音成分を雑
音増幅器（２０）で増幅し、直流増幅器（２１）で検波
贅丸を行い、雑旨量に比１４１シた直流電圧（＝変換す
る。この直流電圧は制御増幅器１図で各伝送線路（９）
、幽）、例に分配される。伝送線路（９）を伝送し、遠
隔制御装置１ｉ０１？受信された直流電圧は、直流増幅
器）２７）において雑音制御可変抵抗器（１６）により
設定された直流電圧と比較され、設定電圧より高い場合
（あるいは低い場合）に低周波増幅器（１４１の動作を
断として、スケルチ動作を行う。When there is no received wave or when the signal is weak, the output of the frequency discriminator (2) contains many noise components, and this noise component is amplified by the noise amplifier (20), and the detection wave is detected by the DC amplifier (21). This DC voltage is converted to a DC voltage (=141) compared to the amount of noise. This DC voltage is applied to each transmission line (9) in the control amplifier 1.
, Yu), distributed to examples. The transmission line (9) transmits, and the remote control device 1i01? The received DC voltage is compared with the DC voltage set by the noise control variable resistor (16) in the DC amplifier) 27), and if it is higher (or lower) than the set voltage, the low frequency amplifier (141) is activated. A squelch operation is performed as a disconnection.
なおこの雑音制御゛可変抵抗器（Ｉ６）の設定は、他の
遠隔制御装置＋２Ｒ１，２１１ｉ内の雑音制御可変抵抗
器（図示は省略しである）に関係なく独立して操作を行
うことができる。The setting of this noise control variable resistor (I6) can be operated independently regardless of the noise control variable resistor (not shown) in other remote control devices +2R1, 211i. .
なお上記実癩例では、雑音制御レベルの設定を雑音制御
可変抵抗器（１６）による連続可変の場合について述べ
たが、レベルの設定を固定抵抗器等により固定とし、雑
音制御回路スイッチを設け、このスイッチにより雑音制
御機能を接直してもよい・また上記実施例では無線装置
（１）に接続される遠隔制御装置ｔＩＯ）、吃）、：２
９１が３台の揚台を示したが、Ｎ台（Ｎは２以上の正の
整数）並夕１１に接続された場合でも同様の効果を奏す
ることは云うまでもない。In the above practical example, the noise control level setting was continuously variable using the noise control variable resistor (16), but the level setting was fixed using a fixed resistor etc., and a noise control circuit switch was provided. This switch may directly control the noise control function.In the above embodiment, the remote control device tIO), 吃), :2 connected to the wireless device (1)
Although 91 shows three lifting platforms, it goes without saying that the same effect can be achieved even when N units (N is a positive integer of 2 or more) are connected to the parallel platform 11.
この発明は以上説明したとおジ、制御増幅器により低周
波信号及び雑音直流電圧を遠隔制御装置に分配し各遠隔
制御装置ごとに設定したレベルによりスケルチ動作を行
なわせるようにしたので、各遠隔制御装置の置かれた環
境あるいは操作者に合った状態でスケルチ動作を行うこ
とができ、したがって通信の効率があがり、また操作す
る者の疲労を少なくし、周囲の人に騒音防害を与えない
という効果がある。As explained above, this invention uses a control amplifier to distribute a low frequency signal and noise DC voltage to the remote control devices, and causes each remote control device to perform a squelch operation at a level set for each remote control device. The squelch operation can be performed in a state that suits the environment or the operator, thus increasing the efficiency of communication, reducing the fatigue of the operator, and not causing noise pollution to surrounding people. There is.
、１−１図は従来の雑音制御回路の一例を下すブロック
結線図、第２図はこの発明の一実施例を示すブロック結
線図である。
図において（１）は無線装置、（２）は周波数弁別器、
（３）は低周波増幅器、（１０）は遠隔制御装置、（１
４）は低周波増幅器、（１６１は雑音制御可変抵抗器、
（至）は雑音増幅器、＋２１１は直流増幅器、Ｉ２２）
は制御増幅器、ｌｒ）は直流増幅器である。
なお、各図中同一符号は、同一または相当部分を示すも
のとする。
代理人 葛 野 信 −, 1-1 is a block diagram showing an example of a conventional noise control circuit, and FIG. 2 is a block diagram showing an embodiment of the present invention. In the figure, (1) is a wireless device, (2) is a frequency discriminator,
(3) is a low frequency amplifier, (10) is a remote control device, (1
4) is a low frequency amplifier, (161 is a noise control variable resistor,
(to) is a noise amplifier, +211 is a DC amplifier, I22)
is a control amplifier, and lr) is a DC amplifier. Note that the same reference numerals in each figure indicate the same or corresponding parts. Agent Shin Kuzuno −
Claims (1)
る無線システムの雑音制御回路において、上記無＃装置
内に設置され復調信号の中から取り出した雑音成分を直
流電圧に変換する直流増幅器と、上記無線装置内に設置
さｔＬ復調信号と上記直流増幅器の出力とを上記各遠隔
側＠装置に分配する制御増幅器と、上記各遠隔制御装置
内（二設置され上記制御増幅器より分配された復調１ｇ
号を増幅する低周波増幅器と、上記遠隔制御装置内に設
（６され上記制御増幅器より分配された雑音直流電圧を
増幅しその設定レベルに応じて上記低周波増幅器の出力
を断とするスケルチ直流増１隔器とを備えたことを特徴
とする雑音制御回路。In a noise control circuit for a wireless system that remotely controls one wireless device from a plurality of remote devices, a DC amplifier installed in the wireless device and converts the noise component extracted from the demodulated signal into a DC voltage. , a control amplifier installed in the wireless device for distributing the tL demodulated signal and the output of the DC amplifier to each of the remote devices; demodulation 1g
a low frequency amplifier for amplifying the signal, and a squelch direct current installed in the remote control device (6) for amplifying the noise DC voltage distributed from the control amplifier and cutting off the output of the low frequency amplifier according to the set level. 1. A noise control circuit characterized by comprising: an amplifier;
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12870982A JPS5917731A (en) | 1982-07-21 | 1982-07-21 | Noise control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12870982A JPS5917731A (en) | 1982-07-21 | 1982-07-21 | Noise control circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5917731A true JPS5917731A (en) | 1984-01-30 |
| JPS632492B2 JPS632492B2 (en) | 1988-01-19 |
Family
ID=14991486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12870982A Granted JPS5917731A (en) | 1982-07-21 | 1982-07-21 | Noise control circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5917731A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3020713U (en) * | 1995-07-18 | 1996-02-06 | 岩谷産業株式会社 | Simple smoked box |
-
1982
- 1982-07-21 JP JP12870982A patent/JPS5917731A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS632492B2 (en) | 1988-01-19 |
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