JPH02190013A - Click noise silencing circuit - Google Patents
Click noise silencing circuitInfo
- Publication number
- JPH02190013A JPH02190013A JP1010272A JP1027289A JPH02190013A JP H02190013 A JPH02190013 A JP H02190013A JP 1010272 A JP1010272 A JP 1010272A JP 1027289 A JP1027289 A JP 1027289A JP H02190013 A JPH02190013 A JP H02190013A
- Authority
- JP
- Japan
- Prior art keywords
- amplifier
- circuit
- turned
- power
- power supply
- 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
- 230000030279 gene silencing Effects 0.000 title 1
- 239000003990 capacitor Substances 0.000 claims description 15
- 230000008878 coupling Effects 0.000 claims description 10
- 238000010168 coupling process Methods 0.000 claims description 10
- 238000005859 coupling reaction Methods 0.000 claims description 10
- 230000001052 transient effect Effects 0.000 abstract description 6
- 230000003213 activating effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 8
- 230000005236 sound signal Effects 0.000 description 4
- 230000004069 differentiation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は音声信号等の信号をアンプに入力して増幅し、
その出力でスピーカ等の音響部品を駆動させる装置にお
いてアンプの電源のオン、オフ時の過渡現象時に発生す
るクリック音を消音する回路に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention amplifies a signal such as an audio signal by inputting it to an amplifier,
The present invention relates to a circuit for muffling the click noise that occurs during transient phenomena when the power of an amplifier is turned on and off in a device that uses its output to drive an acoustic component such as a speaker.
第３図は従来回路の一例の構成を示す接続図で、Ｑｌは
アンプの電源のオン、オフによりオン、オフして２個の
アンプＡｔ、Ａｚに動作電源電圧■ｃｃを供給し、遮断
する電源スィッチ、例えば電源スイッチングトランジス
タ、Ｒ１は抵抗である。Figure 3 is a connection diagram showing the configuration of an example of a conventional circuit, where Ql turns on and off when the amplifier power is turned on and off, supplies the operating power supply voltage ■cc to the two amplifiers At and Az, and shuts it off. A power switch, for example a power switching transistor, R1 is a resistor.
音声信号Ｓは抵抗Ｒ２とコンデンサＣ０の直列回路を介
して各アンプＡ＋、Ａｔの正、負端子に入力され、それ
らの出力がスピーカＳＰに入力されて音声に再生される
。Ｃ２，Ｃ３はそれぞれアンプＡ、、Ａ２の負、正端子
とアース間に接続されたコンデンサである。The audio signal S is input to the positive and negative terminals of each amplifier A+ and At via a series circuit of a resistor R2 and a capacitor C0, and their outputs are input to a speaker SP and reproduced as audio. C2 and C3 are capacitors connected between the negative and positive terminals of amplifiers A and A2, respectively, and the ground.
この第１従来例はスピーカＳＰを駆動するアンプをＡ、
、Ａ、０２個使用して電源投入時のクリック音をなくし
ていたが、アンプを２個使用しているので、小形化、構
成の簡易化を図れないだけでなく、スピーカＳＰが筐体
外に設けるユニット構成ではスピーカＳＰとマイクのア
ースを共通にする必要がある場合、この回路構成では目
的を達成することができない。In this first conventional example, the amplifier driving the speaker SP is A,
, A.02 was used to eliminate the clicking sound when the power was turned on, but since two amplifiers were used, not only was it not possible to downsize and simplify the configuration, but the speaker SP was placed outside the housing. If the provided unit configuration requires the speaker SP and the microphone to be grounded in common, this circuit configuration cannot achieve the purpose.
第４図は従来回路の他側の構成を示す接続図で、スピー
カＳＰとマイクのアースを共通にする場合の回路例であ
る。FIG. 4 is a connection diagram showing the configuration of the other side of the conventional circuit, and is an example of the circuit when the speaker SP and the microphone are connected to a common ground.
この第２従来例では、アンプ八とスピーカＳＰとの間に
結合コンデンサＣ１を接続し、この結合コンデンサＣ１
によりアンプの電源のオン、オフ時に発生ずるクリック
音を消音しようとするものである。In this second conventional example, a coupling capacitor C1 is connected between amplifier 8 and speaker SP, and this coupling capacitor C1
This is intended to silence the clicking sound that occurs when the amplifier is turned on and off.
ＱＩは電源スイッチであるスイッチングトランジスタ、
Ｒ１−Ｒ３は抵抗、ＣＩ ＋ Ｃ２はコンテン４ノ、
ＳＩ＋３２ は信号である。QI is a switching transistor which is a power switch,
R1-R3 are resistors, CI + C2 is content 4,
SI+32 is a signal.
しかしながら上記第２従来例にあっては、結合コンデン
サＣ３だけでは第２図ｆａ） 、 （１））示のよ・）
に電源のオン、オフ時のアンプＡの過渡現象時に生じる
クリック音を消音しきれないという課題があった。However, in the above-mentioned second conventional example, the coupling capacitor C3 alone is required as shown in Fig. 2fa), (1)).
However, there was a problem in that it was not possible to completely silence the click noise that occurred during the transient phenomenon of amplifier A when the power was turned on and off.
本発明回路は上記の課題を解決するため、第１図示のよ
うに信号ＳをアンプＡに入力して増幅ｊ−２、その出力
で結合コンデンサＣ１を介して音響部品ＳＰを駆動させ
る装置において、前記アンプＡの電源のオン１オフ時に
作動してアンプ八を非動作状態にするミューＩ・スイッ
チＱ、と、このミュートスイッチＱ２を一定時間だけ作
動させる時定数回路Ｂとよりなる構成としたものである
。In order to solve the above-mentioned problem, the circuit of the present invention is a device that inputs a signal S to an amplifier A, amplifies it j-2, and drives an acoustic component SP with its output via a coupling capacitor C1, as shown in the first diagram. The mute switch Q is configured to include a mute switch Q that operates when the amplifier A is turned on or off to put the amplifier 8 in a non-operating state, and a time constant circuit B that operates the mute switch Q2 for a certain period of time. It is.
アンプＡの電源のオン、オフ時にミｚ ｌ・スイッチ
Ｑ２が時定数回路Ｂにより一定時間だけ作動し、これに
よってアンプＡが非動作状態になり、電源のオン、オフ
時の過渡現象時に発生ずるクリック音が消音されること
になる。When the power of amplifier A is turned on and off, the time constant circuit B operates the switch Q2 for a certain period of time, and this puts amplifier A into a non-operating state, which occurs during transient phenomena when the power is turned on and off. The click sound will be muted.
以下図面によって本発明の詳細な説明する。 The present invention will be explained in detail below with reference to the drawings.
第１図は本発明回路の一実施例の構成を示す接続図で、
Ｑ、はオペレージコンアンプ八に動作電源電圧Ｖｃｃを
供給し、遮断する電源スイッチングトランジスタ、Ｒ，
は抵抗である。Ｑ２はミュートスイッチングトランジス
タで、アンプへの電源のオン、オフ時に作動−（主しめ
られる。Ｃ，、Ｒ２はそれぞれコンデンサ及び抵抗で、
これらの直列回路はミュートスイッチングトランジスタ
Ｑ２を一定時間だけ作動させる時定数回路Ｂを構成して
いる。FIG. 1 is a connection diagram showing the configuration of an embodiment of the circuit of the present invention.
Q, is a power switching transistor that supplies and cuts off the operating power supply voltage Vcc to the operational control amplifier 8; R,
is resistance. Q2 is a mute switching transistor, which operates when the power to the amplifier is turned on and off.
These series circuits constitute a time constant circuit B that operates the mute switching transistor Q2 for a certain period of time.
電源スイッチングトランジスタＱ、のエミッタ。Emitter of power switching transistor Q.
コレクタは動作電源電圧Ｖｃｃとアンプへの電源端子間
に接続され、そのベースは抵抗Ｒ５を介してアンプＡの
オン、オフ時の信号端子Ｔ１に接続されている。The collector is connected between the operating power supply voltage Vcc and the power supply terminal to the amplifier, and the base thereof is connected to the signal terminal T1 when the amplifier A is turned on or off via a resistor R5.
ミュートスイッチングトランジスタＱ２のエミッタ、コ
レクタは動作電源電圧Ｖｃｃとアンプへの負端子間に接
続され、そのベースは時定数回路Ｂを介して信号端子Ｔ
、に接続されており、かつそのコレクタとアース間には
抵抗Ｒ３とコンデンサＣ２を並列に接続した微分回路Ｃ
が接続されている。The emitter and collector of the mute switching transistor Q2 are connected between the operating power supply voltage Vcc and the negative terminal to the amplifier, and its base is connected to the signal terminal T via the time constant circuit B.
, and has a resistor R3 and a capacitor C2 connected in parallel between its collector and ground.
is connected.
アンプＡの正端子と信号端子Ｔ２間には抵抗Ｒ４とコン
デンサＣ４の直列回路が接続され、信号端子Ｔ２には音
声信号Ｓが入力される。アンプＡの出力とスピーカＳＰ
の一端間には結合コンデンサＣ１が接続され、スピーカ
ＳＰの他端はアースに接続されている。A series circuit of a resistor R4 and a capacitor C4 is connected between the positive terminal of the amplifier A and the signal terminal T2, and the audio signal S is input to the signal terminal T2. Amplifier A output and speaker SP
A coupling capacitor C1 is connected between one end of the speaker SP, and the other end of the speaker SP is connected to ground.
ミュートスイッチングトランジスタ
数回路Ｂ及び微分回路Ｃは本発明回路りを構成している
。The mute switching transistor number circuit B and the differentiation circuit C constitute the circuit of the present invention.
上記の構成において、アンプＡの電源がオンすると、電
源のオンにより信号端子Ｔ１に入力されたオン信号（第
２図（ａ）参照）によって電源スイッチングトランジス
タＱ１がオンして動作電源電圧■ｃｃをアンプＡに印加
する一方、時定数回路ＢのＣ．、Ｒ．の時定数でミュー
トスイッチングトランジスタＱ，が一定時間オンになり
、アンプＡの負端子には動作電源電圧ＶＣＣ＠微分回路
Ｃにより微分された電圧（第２図ｔｃ＋参照）が印加さ
れ、その結果、アンプＡは非動作状態となり、アンプＡ
の出力は第２図（ｄ）示のように徐々に立ち上がるため
、結合コンデンサＣ３によりクリック電圧は阻止され、
アンプの電源のオン、オフ時の過渡現象時のクリック音
が消音されることになる。In the above configuration, when the power of the amplifier A is turned on, the power switching transistor Q1 is turned on by the on signal input to the signal terminal T1 (see Fig. 2 (a)) due to the power being turned on, and the operating power supply voltage ■cc is turned on. C. of time constant circuit B. , R. The mute switching transistor Q is turned on for a certain period of time with a time constant of Amplifier A becomes inactive and amplifier A
Since the output of C gradually rises as shown in Fig. 2(d), the click voltage is blocked by the coupling capacitor C3.
Clicking sounds during transient phenomena when the amplifier's power is turned on and off are silenced.
その後、アンプＡの出力レベルが安定した時点で信号端
子Ｔ２に入ツノされた音声信号Ｓが抵抗Ｒ４＋コンデン
サＣ４を通してアンプへの正端子に入力され、増幅され
てスピーカＳＰに加わり、音声が再生されることになる
。After that, when the output level of amplifier A stabilizes, the audio signal S input to signal terminal T2 is input to the positive terminal of the amplifier through resistor R4 + capacitor C4, is amplified and applied to speaker SP, and the audio is reproduced. That will happen.
上述のように本発明によれば、信号ＳをアンプＡに入力
して増幅し、その出力で結合コンデンサＣ３を介して音
響部品ｓｐを駆動させる装置において、前記アンプＡの
電源のオン、オフ時に作動してアンプＡを非動作状態に
するミュートスイッチＱ２と、このミュートスイッチＱ
２を一定時間だけ作動させる時定数回路Ｂとよりなるの
で、電源のオン、オフ時にアンプＡを一定時間だけ非動
作状態にすることによりアンプＡの電源のオン。As described above, according to the present invention, in a device that inputs a signal S to an amplifier A, amplifies it, and uses its output to drive an acoustic component sp via a coupling capacitor C3, when the power of the amplifier A is turned on or off, A mute switch Q2 that operates to put the amplifier A into a non-operating state, and this mute switch Q
2 is made up of a time constant circuit B that operates for a certain period of time, so when the power is turned on or off, the amplifier A is turned on by keeping the amplifier A inactive for a certain period of time.
オフ時の過渡現象時に発生するクリック音を結合コンデ
ンサＣ１と共に消音することができ、その構成も簡単で
小形にできる。Clicking noise generated during a transient phenomenon when off can be muffled together with the coupling capacitor C1, and its configuration can be made simple and compact.
第１図は本発明回路の一実施例の構成を示す接続図、第
２図は本発明回路と従来回路の動作説明図、第３図は従
来回路の一例の構成を示す接続図、第４図は従来回路の
他側の構成を示す接続図である。
Ｓ・・・・・・（音声）信号、Ａ・・・・・・アンプ、
ｓｐ・・・・・・音響部品（スピーカ）、Ｑｌ・・・・
・・電源スィッチ（電源スイッチングトランジスタ）、
Ｑ２・・・・・・ミュートスイッチ（ミュートスイッチ
ングトランジスタ）、Ｂ・・・・・・時定数回路、Ｃ・
・・・・・微分回路、Ｄ・・・・・・本発明回路、Ｖｃ
ｃ・・・・・・動作電源電圧、Ｃ３・・・・・・結合コ
ンデンサ。
洛３目
箋Ｓｌ目FIG. 1 is a connection diagram showing the configuration of an embodiment of the circuit of the present invention, FIG. 2 is an explanatory diagram of the operation of the circuit of the present invention and the conventional circuit, FIG. 3 is a connection diagram showing the configuration of an example of the conventional circuit, and FIG. The figure is a connection diagram showing the configuration of the other side of the conventional circuit. S... (audio) signal, A... amplifier,
sp...Acoustic parts (speaker), Ql...
・・Power switch (power switching transistor),
Q2... Mute switch (mute switching transistor), B... Time constant circuit, C...
...Differential circuit, D...Circuit of the present invention, Vc
c...Operating power supply voltage, C3...Coupling capacitor. Raku 3rd note SL
Claims (1)
ンデンサＣ＿３を介して音響部品ＳＰを駆動させる装置
において、前記アンプＡの電源のオン、オフ時に作動し
てアンプＡを非動作状態にするミュートスイッチＱ＿２
と、このミュートスイッチＱ＿２を一定時間だけ作動さ
せる時定数回路Ｂとよりなるクリック音消音回路。In a device that inputs a signal S to an amplifier A, amplifies it, and uses its output to drive an acoustic component SP via a coupling capacitor C_3, the device operates when the power of the amplifier A is turned on or off to put the amplifier A in a non-operating state. Mute switch Q_2
and a time constant circuit B that operates the mute switch Q_2 for a certain period of time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1010272A JPH02190013A (en) | 1989-01-18 | 1989-01-18 | Click noise silencing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1010272A JPH02190013A (en) | 1989-01-18 | 1989-01-18 | Click noise silencing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02190013A true JPH02190013A (en) | 1990-07-26 |
Family
ID=11745681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1010272A Pending JPH02190013A (en) | 1989-01-18 | 1989-01-18 | Click noise silencing circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02190013A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5641717A (en) * | 1994-04-25 | 1997-06-24 | Castle; Richard B. | Compositions comprising fused particulates and methods of making same |
-
1989
- 1989-01-18 JP JP1010272A patent/JPH02190013A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5641717A (en) * | 1994-04-25 | 1997-06-24 | Castle; Richard B. | Compositions comprising fused particulates and methods of making same |
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