JPS58129811A - Sound volume controller - Google Patents
Sound volume controllerInfo
- Publication number
- JPS58129811A JPS58129811A JP1069782A JP1069782A JPS58129811A JP S58129811 A JPS58129811 A JP S58129811A JP 1069782 A JP1069782 A JP 1069782A JP 1069782 A JP1069782 A JP 1069782A JP S58129811 A JPS58129811 A JP S58129811A
- Authority
- JP
- Japan
- Prior art keywords
- volume
- sound volume
- resistor
- voltage
- variable resistor
- 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
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/02—Manually-operated control
- H03G3/04—Manually-operated control in untuned amplifiers
Landscapes
- Control Of Amplification And Gain Control (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、音量を調整する装置に関し、音量調整用の可
変抵抗器を調整したときに音量の立ち上りがはやくしか
も最低音量にしたときに完全に音をなくすることのでき
るものを提供することを目的とするものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for adjusting volume, and is capable of quickly raising the volume when adjusting a variable resistor for volume adjustment, and completely eliminating the sound when the volume is set to the lowest volume. The purpose is to provide what is possible.
以下、本発明につきその一実施例を示す図面を参照して
詳細に説明する。第１図はその構成を示し、ここでは直
流の制御電圧を変えることにより差動増幅器の利得を制
御する等して音量を制御す゛る例を示す。図において、
１は音量制御用の可変−べ二′
抵抗器で、その一端に直流電圧子ＶＢを加え、可変端子
から調整した制御電圧ＶＣを取り出し、電圧制御形の音
声増幅回路２の利得制御端子に加える。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings showing one embodiment thereof. FIG. 1 shows its configuration, and here shows an example in which the volume is controlled by controlling the gain of a differential amplifier by changing the DC control voltage. In the figure,
Reference numeral 1 designates a variable-veneer resistor for volume control. A DC voltage element VB is applied to one end of the resistor, and the adjusted control voltage VC is taken out from the variable terminal and applied to the gain control terminal of the voltage-controlled audio amplifier circuit 2. .
さらに、この可変抵抗器１の他端に直列に抵抗３を接続
して接地し、抵抗３の両端間にスイッチングトランジス
タ４を接続する。そして、制御電圧ｖｏ の大きさを検
出する電圧検出回路５を設け、可変抵抗器１が所定音量
以下に調整されて制御電圧ｖｃが所定電圧ｖｃＩ以下に
なったときにスイッチングトランジスタ４を導通させる
°ようにする。Further, a resistor 3 is connected in series to the other end of the variable resistor 1 and grounded, and a switching transistor 4 is connected between both ends of the resistor 3. A voltage detection circuit 5 is provided to detect the magnitude of the control voltage vo, and when the variable resistor 1 is adjusted to a predetermined volume or less and the control voltage VC becomes a predetermined voltage vcI or less, the switching transistor 4 is made conductive. do it like this.
電圧検出回路６としてはシュミット回路やコンパレート
回路を使うとよい。As the voltage detection circuit 6, it is preferable to use a Schmitt circuit or a comparator circuit.
このようＫすると、可変抵抗器１の可変端子の調整位置
に対する音声増幅回路２に加えられる制御電圧ｖｏ（す
なわち音量）の変化は第２図中に実線で示すようになり
、可変抵抗器１のみの場合は破線で示すようになる。こ
こで明らかなように実線の場合の方が可変抵抗器１の調
整に応じて破−の場合よシもカーブがゆるくなり、音量
の小さい範囲での微妙な調整が容易となる。しかも、所
３・−ジ
定電圧ｖｃ・でスイッチングトランジスタ４を切換える
ようにしているので、その所定電圧Ｖ、・に対応する音
量までの立上りは実線の場合の方がはやくなる。そこで
、この所定電圧ｖＯ・を通常聞く範囲での必要な小音量
に設定しておけば、スイッチングトランジスタ４の切換
えによる違和感もなく上記のような特性が得られる。さ
らに、このようにすると、可変抵抗器１により所定電圧
ｖｃ・以下に調整し最低音量に調整したときにはスイッ
チングトランジスタ４が導通することにより制御電圧ｖ
ｃ を完全にＯＫまで下げることができ、音量を完全に
０にすることができ、音漏れもなくすることができる。When K is set in this way, the change in the control voltage vo (that is, the volume) applied to the audio amplifier circuit 2 with respect to the adjustment position of the variable terminal of the variable resistor 1 becomes as shown by the solid line in FIG. In this case, it is indicated by a broken line. As is clear here, the curve in the case of the solid line becomes gentler than that in the case of the broken line according to the adjustment of the variable resistor 1, making it easier to make delicate adjustments in a small volume range. Furthermore, since the switching transistor 4 is switched at the constant voltage Vc, the rise to the volume corresponding to the predetermined voltage V, is faster in the case of the solid line. Therefore, by setting this predetermined voltage vO· to a necessary low volume within the normal listening range, the above-mentioned characteristics can be obtained without causing any discomfort due to switching of the switching transistor 4. Furthermore, in this case, when the variable resistor 1 adjusts the voltage to a predetermined voltage vc.
c can be completely lowered to OK, the volume can be completely reduced to 0, and sound leakage can be eliminated.
このように本発明によれば、音量調整用の可変抵抗器の
調整による音量の立゛上りをはやくすることができ、か
つ小音量での調整を容易にでき、さらに、最低音量にし
たときに完全に音をなくすることのできる有用な音量制
御装置を得ることができる。As described above, according to the present invention, it is possible to make the volume rise quickly by adjusting the variable resistor for volume adjustment, it is possible to easily adjust the volume at a low volume, and furthermore, when the volume is set to the lowest volume, A useful volume control device can be obtained that can completely eliminate sound.
特開昭５８−１２９８１１（２）
第１図は本発明の一実施例における音量制御装置の回路
図、第２図はその動作を説明するだめの特性図である。
１・・・・・・可変抵抗器、２・・・・・・音声増幅回
路、３・・・・・抵抗、４・・・・・・スイッチングト
ランジスタ、６・・・・・・電圧検出回路。JP-A-58-129811 (2) Fig. 1 is a circuit diagram of a volume control device according to an embodiment of the present invention, and Fig. 2 is a characteristic diagram for explaining its operation. 1...Variable resistor, 2...Audio amplifier circuit, 3...Resistor, 4...Switching transistor, 6...Voltage detection circuit .
Claims (1)
スイッチング素子を導通させるようにした音量制御装置
。[Claims] A resistor is connected in series with a variable resistor for volume control. Connect a switching element between both ends of this resistor. A volume control device that causes the switching element to conduct when the variable resistor adjusts the volume to a predetermined volume or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1069782A JPS58129811A (en) | 1982-01-26 | 1982-01-26 | Sound volume controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1069782A JPS58129811A (en) | 1982-01-26 | 1982-01-26 | Sound volume controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58129811A true JPS58129811A (en) | 1983-08-03 |
| JPH0342524B2 JPH0342524B2 (en) | 1991-06-27 |
Family
ID=11757473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1069782A Granted JPS58129811A (en) | 1982-01-26 | 1982-01-26 | Sound volume controller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58129811A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4934395A (en) * | 1988-09-29 | 1990-06-19 | `Totes`, Incorporated | Short fold rib linkage for an umbrella |
-
1982
- 1982-01-26 JP JP1069782A patent/JPS58129811A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4934395A (en) * | 1988-09-29 | 1990-06-19 | `Totes`, Incorporated | Short fold rib linkage for an umbrella |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0342524B2 (en) | 1991-06-27 |
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