JPS6413817U - - Google Patents
Info
- Publication number
- JPS6413817U JPS6413817U JP10631287U JP10631287U JPS6413817U JP S6413817 U JPS6413817 U JP S6413817U JP 10631287 U JP10631287 U JP 10631287U JP 10631287 U JP10631287 U JP 10631287U JP S6413817 U JPS6413817 U JP S6413817U
- Authority
- JP
- Japan
- Prior art keywords
- diodes
- resistors
- insert
- ground
- series
- 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 5
Landscapes
- Logic Circuits (AREA)
Description
第１図は本考案の一実施例を示す回路図、第２
図Ａ，Ｂは第１図の回路における高電圧入力時及
び負電圧入力時の特性図、第３図は従来例を示す
回路図、第４図Ａ，Ｂは第３図の回路における高
電圧入力時及び負電圧入力時の特性図である。
Ｖｃｃ……定電圧源、Ｄ１，Ｄ２……ダイオー
ド、Ｒ１，Ｒ２，Ｒ３……抵抗。
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.
Figures A and B are characteristic diagrams at high voltage input and negative voltage input in the circuit in Figure 1, Figure 3 is a circuit diagram showing a conventional example, and Figures 4 A and B are high voltage in the circuit in Figure 3. It is a characteristic diagram at the time of input and the time of negative voltage input. Vcc ...constant voltage source, D1 , D2 ...diode, R1 , R2 , R3 ...resistance.
Claims (1)
ダイオードを挿入し、これらのダイオード間の接
続点とグランドとの間に直列に２個の抵抗を挿入
し、これらの抵抗の分圧点をＩＣの入力端子に接
続し、外部信号を別の抵抗を介して前記ダイオー
ド間の接続点に入力させる構成としたことを特徴
とするＩＣの入力保護回路。 Insert two diodes in series between the IC constant power supply and the ground, insert two resistors in series between the connection point between these diodes and the ground, and set the voltage dividing point of these resistors. An input protection circuit for an IC, characterized in that the circuit is connected to an input terminal of the IC, and an external signal is inputted to a connection point between the diodes via another resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10631287U JPS6413817U (en) | 1987-07-13 | 1987-07-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10631287U JPS6413817U (en) | 1987-07-13 | 1987-07-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6413817U true JPS6413817U (en) | 1989-01-24 |
Family
ID=31339704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10631287U Pending JPS6413817U (en) | 1987-07-13 | 1987-07-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6413817U (en) |
-
1987
- 1987-07-13 JP JP10631287U patent/JPS6413817U/ja active Pending
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