JPS61239725A - Removing method for click sound of radio equipment - Google Patents
Removing method for click sound of radio equipmentInfo
- Publication number
- JPS61239725A JPS61239725A JP8092385A JP8092385A JPS61239725A JP S61239725 A JPS61239725 A JP S61239725A JP 8092385 A JP8092385 A JP 8092385A JP 8092385 A JP8092385 A JP 8092385A JP S61239725 A JPS61239725 A JP S61239725A
- Authority
- JP
- Japan
- Prior art keywords
- speaker
- output
- circuit
- wave
- tone
- 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
Landscapes
- Noise Elimination (AREA)
Abstract
Description
【発明の詳細な説明】
(産業上の利用分野)
本発明はトーンスケルチ回路殊に送信波断時の通信相手
方受信機のクリック音を除去する回路に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a tone squelch circuit, and more particularly to a circuit for eliminating the click sound of a communication partner's receiver when a transmission wave is interrupted.
(従来技術)
一般に無線通信機ではその受信機に於いて希望波が受信
されないときのその復調出力信号に含まれる過大な雑音
出力を除去するためにスケルチ回路が設けられている。(Prior Art) Generally, a squelch circuit is provided in a wireless communication device in order to remove excessive noise output contained in a demodulated output signal when a desired wave is not received in the receiver.
しかしながら従来のスケルチ回路は希望波が受信されな
い間の雑音除去を目的としたものであって希望波を受信
している状態からこれが停止するか若しくは電界強度の
低下等から受信機に希望波が受信されなくなる過渡期に
生ずる大なりリック音の除去には何等その川音なさない
ものであった。However, conventional squelch circuits are designed to remove noise while the desired wave is not being received, and if the desired wave stops receiving the desired wave or the electric field strength decreases, the desired wave is not received by the receiver. The removal of the loud lick sound that occurs during the transitional period when the sound is no longer produced does not produce any sound.
このクリック音は角度変調方式を採用する通信機にあっ
ては、復調器がその周波数の変化量を検出して音声信号
に変換するものであるから希1波が無くなる時の周波数
変化量は等比的に大なるものであることから非常に大き
なりリック雑音となってスピーカ或は受話器に出力され
極めて聞きづらいものであった。In communication equipment that uses angle modulation, this click sound is generated by a demodulator that detects the amount of change in frequency and converts it into an audio signal, so when the rare 1st wave disappears, the amount of frequency change is the same. Because it is relatively large, it becomes a very loud noise that is output to the speaker or receiver, making it extremely difficult to hear.
(発明の目的)
本発明はかかる従来のスケルチ回路に於ける問題に鑑み
てなされたものであって、ヤヤリア断時のクリック音を
除去した聞き易い無線通信システム、殊ニコート0レス
・テレホン・システムを提供することを目的とする。(Object of the Invention) The present invention has been made in view of the problems in the conventional squelch circuit, and provides an easy-to-hear wireless communication system that eliminates the click sound when the squelch circuit is disconnected, especially a Nikoto 0-less telephone system. The purpose is to provide
(発明の概要)
この目的を達成するために本発明では、トーンスケルチ
方式を採用すると共にキャリア送出を停止する必要ある
ときはこれより若干先行しスケルチ制御用トーンの送出
管停止したのちキャリアを停止するよう構成する。(Summary of the Invention) In order to achieve this object, the present invention employs a tone squelch method, and when it is necessary to stop carrier transmission, the squelch control tone transmission pipe is stopped slightly in advance, and then the carrier is stopped. Configure it like this.
(実施例)
以下本発明を図示した実施例に基づいて詳細に説明する
。(Example) The present invention will be described in detail below based on an illustrated example.
第1図(a)及び(b)は本発明に°係る無線機の送信
1 2″″”go−want社7°′1ゞ6る。同図(
a)に於いて点線で囲んだlは従来の無線送信機であっ
て1発振器oscの出力に変調をかけるための変調器M
OD及びその付属回路としてのマイクM、低周波増幅器
AP@AMP及び電力増幅器T、AMPの各ブロック構
成にて表わしたものである。本発明では上述のブロック
に新らたに、プレススイッチP、8Wのメーク信号を遅
延回路Dt−介して入力OR,回路の一入刃端に又誼O
R回路の他人刃端には前記プレススイッチp、swのメ
ーク信号を夫々入力し該R・回路の出力信号によって前
記送信機部を駆動する。FIGS. 1(a) and 1(b) show the transmission of the wireless device according to the present invention.
In a), l surrounded by a dotted line is a conventional wireless transmitter, and a modulator M for modulating the output of one oscillator osc.
The block configuration is represented by a microphone M as an OD and its auxiliary circuits, a low frequency amplifier AP@AMP, and power amplifiers T and AMP. In the present invention, a new addition to the above-mentioned block is that the make signal of the press switch P and 8W is inputted to the input OR via the delay circuit Dt, and the output signal is input to the input end of the circuit.
The make signals of the press switches p and sw are input to the other end of the R circuit, respectively, and the transmitter section is driven by the output signal of the R circuit.
更に送信信号発信@Te08Cを設けその出力をスイッ
チ8Wz を介して変調用低周波増幅器AP、AMPに
入力すると共に誼スイッチ回路8W1t−前記プレス嗜
スイッチp @swのメータ信号により制御しプレスす
る間前記送信信号発振機下O8Cの出力′t−変調回路
に出力する如く構成したものである。Furthermore, a transmission signal generator @Te08C is provided, and its output is inputted to the modulating low frequency amplifiers AP and AMP via the switch 8Wz, and is controlled by the meter signal of the switch circuit 8W1t-the press switch p@sw during the press operation. The output of the transmission signal oscillator O8C is configured to be output to the t-modulation circuit.
一方通信相手たる無線機の受信機は同図(b) K示す
如く復調器DEMと低周波増幅器AP@AMP2との間
にスピーカ・スイッチ5Wzt挿入接続すると共に復調
信号から前記送信機が送出した送信信号を抽出するフィ
ルタFIL L抜出力でもって前記スピーカ・スイッチ
5W2t−制御し前記送信信号を受信する間のみ前記ス
ピーカ・スイッチをONとしその復調音をスピーカSP
から送出するように構成しておく。On the other hand, the receiver of the wireless device that is the communication partner is connected by inserting a speaker switch 5Wzt between the demodulator DEM and the low frequency amplifier AP@AMP2, as shown in FIG. The speaker switch 5W2t is controlled by the signal extraction filter FIL L output, and the speaker switch is turned ON only while receiving the transmitted signal, and the demodulated sound is transmitted to the speaker SP.
Configure it to send from.
斯のように411!成した無線送受信機は以下の如く動
作する。411 like this! The constructed wireless transceiver operates as follows.
即ち同図(al K於いて、オペレータは従来の送信機
を操作するのと同様にプレス・スイッチP・SWを押圧
しながらイイクMに向ってしゃべればよく、このプレス
操作によって前記OR,回路を介して送信機が送信状態
になると共に前記スイッチ8W1をONとし送信信号発
振器出方がマイクM出力に重畳して変調器MOD 1(
介して送信波に重畳しアンテナAから空間に送出される
。又オペレータがプレス・スイッチを解除すると、前記
スイッチSW1がOFFとなり蓮信信号発振器出力成分
は変調器に至らず送信波に重畳しなくなる。In other words, in the same figure (al K), the operator only has to speak to Iiku M while pressing the press switches P and SW in the same way as operating a conventional transmitter, and by this press operation, the above-mentioned OR and circuit At the same time, the transmitter enters the transmitting state and the switch 8W1 is turned on, so that the output of the transmitting signal oscillator is superimposed on the output of the microphone M and the modulator MOD1 (
It is superimposed on the transmitted wave through the antenna A and sent out into space. When the operator releases the press switch, the switch SW1 is turned off, and the output component of the Renshin signal oscillator does not reach the modulator and is no longer superimposed on the transmitted wave.
ところがプレス信号の一部は遅延回路りにより所定の時
間例えば0.5sec−1sec程度の遅延を受けて前
記OR回路を経て送信機を起動するから骸遅延時間だけ
送信状態を延長せしめることとなり前記送信信号が重畳
しない送信波が ′送出することとなる。However, a part of the press signal is delayed by a predetermined time, for example, about 0.5 sec to 1 sec, by the delay circuit, and then goes through the OR circuit to activate the transmitter, so the transmission state is extended by the delay time, and the transmission is delayed. A transmitted wave with no superimposed signals will be sent out.
一方同図(b)に示す受信機に於いては、上述の手順に
て送信する電波を受信すると、その中に送信信号が含ま
れる間のみスピーカ・スイッチ8Wzが導通しその復調
出力がスピーカ8’ Pから外部に出力されるが、送信
波が切れるより前に前記送信信号は停止しその時点でス
ピーカ出 、・力が断状態となる。即ち送信波が
切れる前にス ゛−□ピーカ出力は断となるから
その時生ずるクリック雑音はスピーカ出方しない。On the other hand, in the receiver shown in FIG. 6(b), when the radio wave to be transmitted is received in the above-described procedure, the speaker switch 8Wz is conductive only while the transmitted signal is included in the radio wave, and its demodulated output is transmitted to the speaker 8. ' The signal is output from P to the outside, but the transmitted signal stops before the transmitted wave is cut off, and at that point the output power of the speaker is cut off. That is, the speaker output is cut off before the transmitted wave is cut off, so the click noise that occurs at that time does not come out of the speaker.
本発明は以上説明した如く、ブレストーク方61線、。As explained above, the present invention uses 61 lines in the Breathtalk direction.
送信ッ停thK先□91ヤ。中よ、続 ゛に重畳
する送信信号を断とし、これを通信相手 □゛と
する受信機は前記送信信号を噴出する間のみ □
その復調音を例えばスピーカ等によって外部に送出する
ものであるから送信波が途切れる際に、j”
この通信相手たる受信機を操作するオペレータは該受信
機にて生ずるクリック雑音を耳にする煩わしさから解放
される。Sending stop thK destination □91 Ya. The receiver, which cuts off the superimposed transmission signal and uses this as the communication partner, only transmits the transmission signal while emitting the transmission signal.
Since the demodulated sound is transmitted to the outside through a speaker, etc., when the transmitted wave is interrupted, the operator who operates the receiver, which is the communication partner, has to listen to the clicking noise generated by the receiver. be freed from
伺上述の実施例に於いては送信機に於ける送信信号発根
器T・O20と受信機に於けるフィルタFIL及びスピ
ーカ・スイッチ8W2 とを新らたに付加したが1本発
明はこれらに限定される必然性は何等なく9例えば従来
のトーン・スケスチ方式を採用する無線機に本発明を採
用する場合は送信機に遅延口′WlID及びOR,回路
を付加するのみでよく極めて安価に本発明を実施するこ
とができる。In the above-described embodiment, a transmitting signal generator T.O20 in the transmitter and a filter FIL and a speaker switch 8W2 in the receiver were newly added, but the present invention adds to these. For example, if the present invention is applied to a radio device that employs the conventional tone/squeezing method, it is only necessary to add a delay gate, WlID, OR circuit to the transmitter, and the present invention can be implemented at an extremely low cost. can be carried out.
(発明の効果)
本発明は以上説明したようにキャリア断に先だってスケ
ルチ制御用トーンを停止するよう構成するものであるか
らキャリア断時に発生する雑音のスピーカ等から送出さ
れることを防止し聞き易い受信音とするうえで効果があ
る。(Effects of the Invention) As explained above, the present invention is configured to stop the squelch control tone before the carrier is disconnected, so that the noise generated when the carrier is disconnected is prevented from being transmitted from the speaker, etc., making it easier to hear. This is effective in making it a received sound.
第1図(at及び(blは本発明の一実施例を示す無線
送信機及び受信機のブロック図である。
T・O20・・・・・・・・・トーン発振器。
D・・・・・・・・・遅延回路。FIG. 1 (at and (bl) are block diagrams of a wireless transmitter and receiver showing an embodiment of the present invention. T.O20...Tone oscillator. D...... ...Delay circuit.
Claims (2)
に於いて、送信機から出力するキャリヤ停止に先だって
スケルチ制御トーンを停止すると共に通信相たる受信機
に於いては前記スケルチ制御トーンを検出する間のみ復
調音をスピーカに出力するようにしたことを特徴とする
無線機のクリック音除去方法。(1) In a wireless system that employs a tone squelch system, the squelch control tone is stopped before the carrier output from the transmitter is stopped, and the receiver, which is the communication phase, makes demodulated sound only while detecting the squelch control tone. A method for removing a click sound from a wireless device, characterized in that the click sound is outputted to a speaker.
ムであることを特徴とする特許請求の範囲1項記載の無
線機のクリック音除去方法。(2) The click sound removal method for a radio device according to claim 1, wherein the radio system is a cordless telephone system.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8092385A JPS61239725A (en) | 1985-04-16 | 1985-04-16 | Removing method for click sound of radio equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8092385A JPS61239725A (en) | 1985-04-16 | 1985-04-16 | Removing method for click sound of radio equipment |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS61239725A true JPS61239725A (en) | 1986-10-25 |
Family
ID=13731944
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8092385A Pending JPS61239725A (en) | 1985-04-16 | 1985-04-16 | Removing method for click sound of radio equipment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS61239725A (en) |
-
1985
- 1985-04-16 JP JP8092385A patent/JPS61239725A/en active Pending
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