JPS643211U - - Google Patents
Info
- Publication number
- JPS643211U JPS643211U JP9432787U JP9432787U JPS643211U JP S643211 U JPS643211 U JP S643211U JP 9432787 U JP9432787 U JP 9432787U JP 9432787 U JP9432787 U JP 9432787U JP S643211 U JPS643211 U JP S643211U
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- control voltage
- timer circuit
- sound reproduction
- reproduction means
- 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
- 230000007423 decrease Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
Landscapes
- Control Of Amplification And Gain Control (AREA)
Description
第１図は本考案の一実施例を示す回路図、第２
図は第１図の動作を示す特性図、第３図は従来の
回路図、第４図は第３図の動作を示す特性図であ
る。
２……タイマー回路、３……音響再生装置、５
……比較器、Ｑ６……トランジスタ。
Figure 1 is a circuit diagram showing one embodiment of the present invention, Figure 2 is a circuit diagram showing an embodiment of the present invention.
1 is a characteristic diagram showing the operation of FIG. 1, FIG. 3 is a conventional circuit diagram, and FIG. 4 is a characteristic diagram showing the operation of FIG. 3. 2... Timer circuit, 3... Sound reproduction device, 5
... Comparator, Q 6 ... Transistor.
Claims (1)
と、設定時間後に電源の供給を断にするタイマー
回路と、このタイマー回路をスタートして電源の
供給が断たれるまでの間に漸次小さくなる制御電
圧を得る制御回路と、この制御回路の制御電圧に
より出力インピーダンスを可変し、前記音響再生
手段の再生レベルを漸次小さくするインピーダン
ス素子とからなるスリープタイマー回路。 A sound reproduction means that amplifies and then reproduces an acoustic signal, a timer circuit that cuts off the power supply after a set time, and a control voltage that gradually decreases from the time the timer circuit starts until the power supply is cut off. and an impedance element that varies output impedance by a control voltage of the control circuit and gradually reduces the reproduction level of the sound reproduction means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9432787U JPS643211U (en) | 1987-06-19 | 1987-06-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9432787U JPS643211U (en) | 1987-06-19 | 1987-06-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS643211U true JPS643211U (en) | 1989-01-10 |
Family
ID=31318838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9432787U Pending JPS643211U (en) | 1987-06-19 | 1987-06-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS643211U (en) |
-
1987
- 1987-06-19 JP JP9432787U patent/JPS643211U/ja active Pending