JPH0390512U - - Google Patents
Info
- Publication number
- JPH0390512U JPH0390512U JP15003389U JP15003389U JPH0390512U JP H0390512 U JPH0390512 U JP H0390512U JP 15003389 U JP15003389 U JP 15003389U JP 15003389 U JP15003389 U JP 15003389U JP H0390512 U JPH0390512 U JP H0390512U
- Authority
- JP
- Japan
- Prior art keywords
- light
- amount
- emitting diode
- decrease
- terminal
- 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
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Control Of Amplification And Gain Control (AREA)
Description
第１図は本考案に係るボリユーム回路の一実施
例を示す回路図、第２図は従来のボリユーム回路
の回路図である。
１，２，ｎ……制御端子、Ｔ１，Ｔ２……信号
入力端子、ＳＰ……スピーカ、ＴＲ……トランス
、Ｒ，Ｒ１，Ｒ２，Ｒｎ……抵抗、ＰＣ……ホト
カプラ、Ｄ……発光ダイオード、Ｑ……受光トラ
ンジスタ。
FIG. 1 is a circuit diagram showing an embodiment of a volume circuit according to the present invention, and FIG. 2 is a circuit diagram of a conventional volume circuit. 1, 2, n...Control terminal, T1, T2...Signal input terminal, SP...Speaker, TR...Transformer, R, R1 , R2 , Rn ...Resistor, PC...Photocoupler, D... ...Light emitting diode, Q...Light receiving transistor.
Claims (1)
た前記複数の抵抗器の一端に他方の端子が接続さ
れる発光ダイオードおよび入力抵抗器の両端のそ
れぞれにコレクタとエミツタとが接続される受光
トランジスタからなる光電結合器を備え、並列接
続された前記複数の抵抗器の他端のそれぞれに印
加される電圧を制御して前記発光ダイオードの発
光量の増減を制御し、前記受光トランジスタに前
記発光量に応じた値のオン抵抗を発生させること
により、信号の出力量を調整するようにしたこと
を特徴とするボリユーム回路。 a light-emitting diode, one terminal of which is connected to a power source, and the other terminal of which is connected to one end of the plurality of resistors connected in parallel; and a light-receiving transistor, whose collector and emitter are connected to both ends of an input resistor, respectively. a photoelectric coupler configured to control the voltage applied to each of the other ends of the plurality of resistors connected in parallel to control an increase/decrease in the amount of light emitted from the light emitting diode, and to increase or decrease the amount of light emitted by the light receiving transistor. A volume circuit characterized in that the amount of signal output is adjusted by generating an on-resistance of a value corresponding to the value of the volume circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15003389U JPH0390512U (en) | 1989-12-28 | 1989-12-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15003389U JPH0390512U (en) | 1989-12-28 | 1989-12-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0390512U true JPH0390512U (en) | 1991-09-13 |
Family
ID=31696402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15003389U Pending JPH0390512U (en) | 1989-12-28 | 1989-12-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0390512U (en) |
-
1989
- 1989-12-28 JP JP15003389U patent/JPH0390512U/ja active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0390512U (en) | ||
| JPS6271925U (en) | ||
| JPH0175875U (en) | ||
| JPS61119422U (en) | ||
| JPH01147533U (en) | ||
| JPS5894018U (en) | Overcurrent detection circuit | |
| JPS6022798U (en) | Photoelectric element light intensity correction circuit | |
| JPH022675U (en) | ||
| JPS6374849U (en) | ||
| JPH0170431U (en) | ||
| JPS6115856U (en) | Electrical/optical conversion device | |
| JPH031453U (en) | ||
| JPH01153751U (en) | ||
| JPS61176686U (en) | ||
| JPH01107281U (en) | ||
| JPS6421943U (en) | ||
| JPS61121047U (en) | ||
| JPH02150512U (en) | ||
| JPS6214589U (en) | ||
| JPH01119223U (en) | ||
| JPS625387U (en) | ||
| JPS62178627U (en) | ||
| JPH033757U (en) | ||
| JPH0224566U (en) | ||
| JPS61116440U (en) |