JPS55102030A - Power supply unit for computer terminal unit - Google Patents
Power supply unit for computer terminal unitInfo
- Publication number
- JPS55102030A JPS55102030A JP1007379A JP1007379A JPS55102030A JP S55102030 A JPS55102030 A JP S55102030A JP 1007379 A JP1007379 A JP 1007379A JP 1007379 A JP1007379 A JP 1007379A JP S55102030 A JPS55102030 A JP S55102030A
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- scr
- current
- circuit
- scr12
- 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
Abstract
PURPOSE: To reduce the current capacity for power switch and SCR, by providing the first SCR inserted between the AC power supply and peripheral unit power supply circuit and the second SCR operated with the current supply path of separate system as the first SCR.
CONSTITUTION: When the power switch 22 is closed, the first SCR12 is conducted, and the AC power supply 11 is fed to the peripheral unit power supply circuit 13 and the terminal unit DC power supply circuit 31. The circuit 31 supplies operating voltage from the auxiliary power supply circuit 15 to the switching regulator 19 and the second SCR is conducted by driving the gate trigger power supply circuit 21. After the start of the circuit 31, the power input does not pass through SCR 12 but through SCR 20 to the rectifier 17, allowing to reduce the rated current and interrupting capacity for the switch 22, since it only flows the gate current of SCR12. Further, the current to the circuit 15 flows to SCR12, but the rash current at start of the circuit 31 is limited with the resistor 16 and the input to the rectifier is only for a short time, then the current capacity of SCR12 can be small.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1007379A JPS55102030A (en) | 1979-01-31 | 1979-01-31 | Power supply unit for computer terminal unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1007379A JPS55102030A (en) | 1979-01-31 | 1979-01-31 | Power supply unit for computer terminal unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55102030A true JPS55102030A (en) | 1980-08-04 |
Family
ID=11740182
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1007379A Pending JPS55102030A (en) | 1979-01-31 | 1979-01-31 | Power supply unit for computer terminal unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55102030A (en) |
-
1979
- 1979-01-31 JP JP1007379A patent/JPS55102030A/en active Pending
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