JPS63196121U - - Google Patents
Info
- Publication number
- JPS63196121U JPS63196121U JP8717687U JP8717687U JPS63196121U JP S63196121 U JPS63196121 U JP S63196121U JP 8717687 U JP8717687 U JP 8717687U JP 8717687 U JP8717687 U JP 8717687U JP S63196121 U JPS63196121 U JP S63196121U
- Authority
- JP
- Japan
- Prior art keywords
- pull resistance
- resistance element
- current path
- series
- switching circuit
- 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 4
- 238000001514 detection method Methods 0.000 description 1
Landscapes
- Electronic Switches (AREA)
Description
第１図は本考案に係るスイツチング回路の一例
を示す回路図、第２図〜第５図は第１図における
各部の信号状態を示す波形図、第６図は従来のス
イツチング回路の一例を示す回路図、第７図は第
６図における各部の信号状態を示す波形図である
。
ＰＨＣ……フオトカプラ、Ｒ１……プルアツプ
抵抗素子、Ｒ２……補助プルアツプ抵抗素子、Ｔ
Ｒ１……電圧検出用のトランジスタ、ＴＲ２……
電流路開閉用のスイツチングトランジスタ。
Fig. 1 is a circuit diagram showing an example of a switching circuit according to the present invention, Figs. 2 to 5 are waveform diagrams showing signal states of each part in Fig. 1, and Fig. 6 is an example of a conventional switching circuit. The circuit diagram and FIG. 7 are waveform diagrams showing the signal states of each part in FIG. 6. PHC...Photocoupler, R1...Pull-up resistance element, R2...Auxiliary pull-up resistance element, T
R1...Transistor for voltage detection, TR2...
Switching transistor for opening and closing the current path.
Claims (1)
を有するプル抵抗素子とを電源端子間に直列接続
し、前記トランジスタ素子とプル抵抗素子との接
続点から出力を取り出すようにしたスイツチング
回路において、 前記プル抵抗素子と並列に電流路を形成してこ
れに補助プル抵抗素子及びスイツチ素子を直列介
挿するとともに、 前記トランジスタ素子がオフされた際に出力端
子に生ずる電位変化を早期に検出して前記スイツ
チ素子をオンさせ前記電流路を開く制御回路を設
けたこと、 を特徴とするスイツチング回路。[Claims for Utility Model Registration] A transistor element into which a signal is input and a pull resistance element having a high resistance value are connected in series between power supply terminals, and an output is taken out from a connection point between the transistor element and the pull resistance element. In the switching circuit, a current path is formed in parallel with the pull resistance element, an auxiliary pull resistance element and a switch element are inserted in series thereto, and a potential change that occurs at the output terminal when the transistor element is turned off is controlled. A switching circuit comprising: a control circuit that detects at an early stage, turns on the switch element, and opens the current path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8717687U JPS63196121U (en) | 1987-06-05 | 1987-06-05 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8717687U JPS63196121U (en) | 1987-06-05 | 1987-06-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63196121U true JPS63196121U (en) | 1988-12-16 |
Family
ID=30944160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8717687U Pending JPS63196121U (en) | 1987-06-05 | 1987-06-05 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63196121U (en) |
-
1987
- 1987-06-05 JP JP8717687U patent/JPS63196121U/ja active Pending
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