JPH0454441U - - Google Patents
Info
- Publication number
- JPH0454441U JPH0454441U JP9628390U JP9628390U JPH0454441U JP H0454441 U JPH0454441 U JP H0454441U JP 9628390 U JP9628390 U JP 9628390U JP 9628390 U JP9628390 U JP 9628390U JP H0454441 U JPH0454441 U JP H0454441U
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- transistor
- contact
- conducts
- cpu
- 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
- 238000010586 diagram Methods 0.000 description 2
Description
第１図は本考案の電子機器の電源保持装置の回
路構成図、第２図は従来の電源保持装置の回路構
成図である。
１……電源スイツチ、２……スイツチング回路
、３……電子機器、５……ＣＰＵ、Ｑ１，Ｑ２，
Ｑ３，Ｑ４……第１乃至第４トランジスタ、Ｔ１
……給電端子、Ｋ０……直結接点、Ｋ１，Ｋ２…
…第１、第２接点、Ｚ０……定電圧ダイオード、
ＨＬＤ……保持端子、Ｌ１……給電路。
FIG. 1 is a circuit diagram of a power supply holding device for electronic equipment according to the present invention, and FIG. 2 is a circuit diagram of a conventional power supply holding device. 1... Power switch, 2... Switching circuit, 3... Electronic equipment, 5... CPU, Q 1 , Q 2 ,
Q 3 , Q 4 ...first to fourth transistors, T 1
...Power supply terminal, K 0 ... Direct connection contact, K 1 , K 2 ...
...First and second contacts, Z 0 ... Constant voltage diode,
HLD...Holding terminal, L1 ...Power supply line.
Claims (1)
を介して、ＣＰＵの制御により負荷となる電子機
器に給電する装置において、常時荷電状態にある
上記直流電源の給電端子に直結される接点と、該
直結接点又は給電端子に上記直列トランジスタの
エミツタが接がれ、上記直結接点を経由しコレク
タを介し上記負荷への給電路に導かれる第１接点
と、上記直結接点を経由して上記給電路から切離
される第２接点とを備え、上記第１及び第２接点
間を接触子が摺動切換えする単一回路短絡型電源
スイツチ、上記直流電源の荷電時に、上記ＣＰＵ
の保持端子に現われる論理出力により導通するエ
ミツタ接地の第４トランジスタ、上記接触子が上
記第２接点にある時、上記直流電源がエミツタを
経由してベースに加えられ、コレクタの零電位を
上記ＣＰＵが監視し上記第４トランジスタのコレ
クタ電流により導通する第３トランジスタ、上記
第３トランジスタのコレクタ電流により上記第４
トランジスタを介して上記直列トランジスタの接
地への通電電流を導通させる第２トランジスタよ
り成り、負荷への給電停止時期を電源スイツチの
遮断時より伸延せしめたことを特徴とする電子機
器の電源保持装置。 In a device that supplies power from a DC power supply to an electronic device as a load under the control of a CPU via a power switch and a series transistor, a contact directly connected to a power supply terminal of the DC power supply that is constantly charged, and the directly connected contact or power supply. The emitters of the series transistors are connected to the terminals, and a first contact is led to the power supply path to the load via the direct connection contact and the collector, and a first contact is disconnected from the power supply path via the direct connection contact. a single-circuit short-circuit type power supply switch comprising two contacts, in which a contactor slides between the first and second contacts, and when charging the DC power supply, the CPU
A fourth transistor whose emitter is grounded conducts by a logic output appearing at the holding terminal of the CPU. a third transistor that is monitored and conducts by the collector current of the fourth transistor;
A power supply holding device for an electronic device, comprising a second transistor that conducts a current to the ground of the series transistor through the transistor, and extending the time when power supply to the load is stopped from when the power switch is cut off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9628390U JP2549220Y2 (en) | 1990-09-12 | 1990-09-12 | Power holding device for electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9628390U JP2549220Y2 (en) | 1990-09-12 | 1990-09-12 | Power holding device for electronic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0454441U true JPH0454441U (en) | 1992-05-11 |
| JP2549220Y2 JP2549220Y2 (en) | 1997-09-30 |
Family
ID=31835685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9628390U Expired - Fee Related JP2549220Y2 (en) | 1990-09-12 | 1990-09-12 | Power holding device for electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2549220Y2 (en) |
-
1990
- 1990-09-12 JP JP9628390U patent/JP2549220Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2549220Y2 (en) | 1997-09-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |