JPS5530743A - Isolation type digital signal input circuit - Google Patents
Isolation type digital signal input circuitInfo
- Publication number
- JPS5530743A JPS5530743A JP10291878A JP10291878A JPS5530743A JP S5530743 A JPS5530743 A JP S5530743A JP 10291878 A JP10291878 A JP 10291878A JP 10291878 A JP10291878 A JP 10291878A JP S5530743 A JPS5530743 A JP S5530743A
- Authority
- JP
- Japan
- Prior art keywords
- drive
- digital signal
- signal input
- input circuit
- secondary winding
- 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
Landscapes
- Electronic Switches (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Dc Digital Transmission (AREA)
Abstract
PURPOSE: To prevent the malfunction with a simple constitution and the damage in semiconductor and to enable high integrated mounting, by using the potential at the connecting point between the secondary winding of an isolation transformer and the drive transistor as the output corresponding to ON and OFF of the switching circuit.
CONSTITUTION: The isolation transformer 33 has the primary and secondary windings, the diode 32 is connected in parallel with the primary winding, and the transistor Tr switching circuit 31 is connected in the opposite connection as the diode 32 so that the primary winding can be shortened. Further, the drive Tr 34 is connected in series with the secondary winding and also the parallel capacitor 38, and it is connected to the power supply Vcc via the resistor 37. Thus, the potential at the connecting point between the secondary winding and the drive Tr is used as the output corresponding to ON and OFF of the circuit 31. Then, with a simple constitution, malfunction is avoided in the control unit and the damages in semiconductors are prevented to enable high integration mounting.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10291878A JPS59185B2 (en) | 1978-08-25 | 1978-08-25 | Isolated digital signal input circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10291878A JPS59185B2 (en) | 1978-08-25 | 1978-08-25 | Isolated digital signal input circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5530743A true JPS5530743A (en) | 1980-03-04 |
JPS59185B2 JPS59185B2 (en) | 1984-01-05 |
Family
ID=14340229
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10291878A Expired JPS59185B2 (en) | 1978-08-25 | 1978-08-25 | Isolated digital signal input circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS59185B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS587922A (en) * | 1981-07-07 | 1983-01-17 | Fuji Electric Co Ltd | Insulating type digital signal inputting circuit |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63103671U (en) * | 1986-12-25 | 1988-07-05 | ||
JPH02149280U (en) * | 1989-05-23 | 1990-12-19 | ||
JPH04272779A (en) * | 1991-02-27 | 1992-09-29 | Hirotaka Nakano | Plaything |
-
1978
- 1978-08-25 JP JP10291878A patent/JPS59185B2/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS587922A (en) * | 1981-07-07 | 1983-01-17 | Fuji Electric Co Ltd | Insulating type digital signal inputting circuit |
Also Published As
Publication number | Publication date |
---|---|
JPS59185B2 (en) | 1984-01-05 |
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