JPS627745U - - Google Patents
Info
- Publication number
- JPS627745U JPS627745U JP9850285U JP9850285U JPS627745U JP S627745 U JPS627745 U JP S627745U JP 9850285 U JP9850285 U JP 9850285U JP 9850285 U JP9850285 U JP 9850285U JP S627745 U JPS627745 U JP S627745U
- Authority
- JP
- Japan
- Prior art keywords
- power source
- power supply
- rectified
- rectifying element
- input side
- 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 5
Landscapes
- Stand-By Power Supply Arrangements (AREA)
Description
第１図はこの考案による電源切換回路の一例を
示す回路構成図、第２図はその切換動作説明用の
電源入出力レベル図、第３図は上記第１図に示さ
れた電源切換回路の変形実施例を示す回路図、第
４図はリレー形式による従来の電源切換回路図で
ある。
図中、８はアダプタ、９は整流装置、１０は電
池電源、１１は各部回路、１３は電源切換回路、
１４，１５はダイオード、１６は抵抗、１７はト
ランジスタである。
Fig. 1 is a circuit configuration diagram showing an example of a power supply switching circuit according to this invention, Fig. 2 is a power input/output level diagram for explaining the switching operation, and Fig. 3 is a diagram of the power supply switching circuit shown in Fig. 1 above. A circuit diagram showing a modified embodiment, FIG. 4 is a conventional power supply switching circuit diagram using a relay type. In the figure, 8 is an adapter, 9 is a rectifier, 10 is a battery power supply, 11 is each circuit, 13 is a power supply switching circuit,
14 and 15 are diodes, 16 is a resistor, and 17 is a transistor.
Claims (1)
の二つの電源に接続され、上記交流電源が断たれ
たとき上記整流電源を自動的に上記電池電源に切
り換えて負荷側に出力する電源切換回路であつて
、 上記整流電源の入力側にアノードが接続され、
出力側にカソードが接続された第１の整流素子と
、 上記整流電源の入力側にアノードが接続され、
そのカソードが抵抗を介して接地された第２の整
流素子と、 上記電池電源の入力側にエミツタが接続され、
上記出力側にコレクタが接続されるとともに、そ
のベースが上記第２の整流素子と抵抗との接続点
に接続されたトランジスタとを備えてなる電源切
換回路。[Claims for Utility Model Registration] Connected to two power sources: a rectified power source obtained by rectifying an AC power source and a battery power source, and when the AC power source is cut off, the rectified power source is automatically switched to the battery power source. It is a power supply switching circuit that outputs to the load side, and the anode is connected to the input side of the rectified power supply.
a first rectifying element with a cathode connected to the output side; an anode connected to the input side of the rectified power supply;
A second rectifying element whose cathode is grounded via a resistor, and an emitter connected to the input side of the battery power source,
A power supply switching circuit comprising a transistor having a collector connected to the output side and a base connected to a connection point between the second rectifying element and the resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9850285U JPS627745U (en) | 1985-06-28 | 1985-06-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9850285U JPS627745U (en) | 1985-06-28 | 1985-06-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS627745U true JPS627745U (en) | 1987-01-17 |
Family
ID=30966493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9850285U Pending JPS627745U (en) | 1985-06-28 | 1985-06-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS627745U (en) |
-
1985
- 1985-06-28 JP JP9850285U patent/JPS627745U/ja active Pending