JPS621234U - - Google Patents
Info
- Publication number
- JPS621234U JPS621234U JP9217485U JP9217485U JPS621234U JP S621234 U JPS621234 U JP S621234U JP 9217485 U JP9217485 U JP 9217485U JP 9217485 U JP9217485 U JP 9217485U JP S621234 U JPS621234 U JP S621234U
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- clock pulse
- external power
- switching
- built
- 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 2
- 230000002093 peripheral effect Effects 0.000 description 2
Landscapes
- Power Sources (AREA)
- Calculators And Similar Devices (AREA)
Description
第１図は本考案の小型電子機器と周辺機器の外
観斜視図、第２図は第１実施例のブロツク回路図
、第３図は第２実施例のブロツク回路図である。
１，１２，１３…発振器、２…分周器、３，１
３…コネクタ、４，５，１４，１５…ＡＮＤゲー
ト、６，１６…ＯＲゲート、１０…携帯情報機器
、１１…周辺機器、ＶＤＤ…電源。
FIG. 1 is an external perspective view of a small electronic device and peripheral equipment of the present invention, FIG. 2 is a block circuit diagram of the first embodiment, and FIG. 3 is a block circuit diagram of the second embodiment. 1, 12, 13... Oscillator, 2... Frequency divider, 3, 1
3... Connector, 4, 5, 14, 15... AND gate, 6, 16... OR gate, 10... Portable information device, 11... Peripheral device, VDD... Power supply.
Claims (1)
クロツクパルスに同期して動作する小型電子機器
において、外部電源を接続する接続手段と、外部
電源が接続された際駆動電源を内蔵電源から外部
電源に切替える動作電源切替手段と、外部電源が
接続された際内蔵電源を駆動電源としたときに出
力されるクロツクパルスより高い周波数を有する
クロツクパルスに切替えるクロツクパルス切替手
段とを具備したことを特徴とする小型電子機器。 A connection means for connecting an external power supply in small electronic devices that use a built-in power supply as the drive power source and operates in synchronization with a clock pulse with a constant frequency, and a method for switching the drive power source from the built-in power supply to the external power supply when the external power supply is connected. A small electronic device characterized by comprising an operating power supply switching means and a clock pulse switching means for switching to a clock pulse having a higher frequency than a clock pulse output when an internal power supply is used as a driving power supply when an external power supply is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9217485U JPS621234U (en) | 1985-06-20 | 1985-06-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9217485U JPS621234U (en) | 1985-06-20 | 1985-06-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS621234U true JPS621234U (en) | 1987-01-07 |
Family
ID=30648733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9217485U Pending JPS621234U (en) | 1985-06-20 | 1985-06-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS621234U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54146926A (en) * | 1978-05-10 | 1979-11-16 | Nec Corp | Computer system |
| JPS59206921A (en) * | 1983-05-10 | 1984-11-22 | Sharp Corp | Electronic instrument |
-
1985
- 1985-06-20 JP JP9217485U patent/JPS621234U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54146926A (en) * | 1978-05-10 | 1979-11-16 | Nec Corp | Computer system |
| JPS59206921A (en) * | 1983-05-10 | 1984-11-22 | Sharp Corp | Electronic instrument |
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