JPH01147645U - - Google Patents
Info
- Publication number
- JPH01147645U JPH01147645U JP4222488U JP4222488U JPH01147645U JP H01147645 U JPH01147645 U JP H01147645U JP 4222488 U JP4222488 U JP 4222488U JP 4222488 U JP4222488 U JP 4222488U JP H01147645 U JPH01147645 U JP H01147645U
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- storage medium
- main
- backup
- main power
- 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
- 238000001514 detection method Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Power Sources (AREA)
- Stand-By Power Supply Arrangements (AREA)
Description
図面は本考案に関する電源供給回路の一実施例
を示し、第１図は回路図、第２図は各部の信号の
状態を示す表、第３図は従来例の回路図である。
（主要部分を示す図面の符号の説明）、１……
装置本体、２……主電源、２ａ……スイツチ、３
……バツクアツプ電源、４……外部記憶装置、５
……主電源供給端子、６……検出用端子。
The drawings show one embodiment of the power supply circuit according to the present invention, with FIG. 1 being a circuit diagram, FIG. 2 being a table showing the signal states of each part, and FIG. 3 being a circuit diagram of a conventional example. (Explanation of symbols in drawings indicating main parts), 1...
Device body, 2...Main power supply, 2a...Switch, 3
... Backup power supply, 4 ... External storage device, 5
...Main power supply terminal, 6...Detection terminal.
Claims (1)
主電源のオフ時にバツクアツプ電源からの給電必
要な記憶媒体及び給電不要な記憶媒体を備えた外
部記憶装置と、上記主電源から外部記憶装置に給
電する主電源供給端子と、主電源のオフ時に上記
給電必要な記憶媒体の信号レベルを検出してバツ
クアツプ電源から給電させる検出用端子とを備え
て構成された電源供給回路において、前記検出用
端子は各記憶媒体毎に異なる信号レベル検出可能
に設定するとともに、主電源とバツクアツプ電源
との間は検出用端子が給電必要な記憶媒体の主電
源のオフ時の信号レベルの検出により前記主電源
供給端子への給電をバツクアツプ電源からに切り
換える切換手段を設けたことを特徴とする電源供
給回路。 A main unit equipped with a main power source and a backup power source,
an external storage device with a storage medium that requires power supply from a backup power supply when the main power supply is turned off, and a storage medium that does not require power supply; a main power supply terminal that supplies power from the main power supply to the external storage device; In a power supply circuit configured to include a detection terminal that detects the signal level of a storage medium that requires power supply and supplies power from a backup power source, the detection terminal is set to be able to detect a different signal level for each storage medium. In addition, a switching means is provided between the main power supply and the backup power supply so that the detection terminal switches the power supply to the main power supply terminal from the backup power supply by detecting a signal level when the main power supply of the storage medium to which power is to be supplied is turned off. A power supply circuit characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4222488U JPH01147645U (en) | 1988-03-30 | 1988-03-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4222488U JPH01147645U (en) | 1988-03-30 | 1988-03-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01147645U true JPH01147645U (en) | 1989-10-12 |
Family
ID=31268643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4222488U Pending JPH01147645U (en) | 1988-03-30 | 1988-03-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01147645U (en) |
-
1988
- 1988-03-30 JP JP4222488U patent/JPH01147645U/ja active Pending
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