JPH0365974U - - Google Patents
Info
- Publication number
- JPH0365974U JPH0365974U JP12728689U JP12728689U JPH0365974U JP H0365974 U JPH0365974 U JP H0365974U JP 12728689 U JP12728689 U JP 12728689U JP 12728689 U JP12728689 U JP 12728689U JP H0365974 U JPH0365974 U JP H0365974U
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- battery
- power
- circuit
- line
- 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
Description
第１図はこの考案に係る指示計器駆動装置の一
実施例を示すブロツク構成図、第２図は従来の指
示計器駆動装置の一例を示すブロツク構成図であ
る。
１……バツテリ、４……バツクアツプコンデン
サ、５……電源回路、８……第１のレベル検出回
路、１４……指示計器、１５……駆動回路、２１
……第２のレベル検出回路、２３……スイツチ、
ＩＬ……イグニツシヨン系電源ライン、ＢＬ……
バツテリ系電源ライン。
FIG. 1 is a block diagram showing an embodiment of an indicator driving device according to the present invention, and FIG. 2 is a block diagram showing an example of a conventional indicator driving device. DESCRIPTION OF SYMBOLS 1... Battery, 4... Backup capacitor, 5... Power supply circuit, 8... First level detection circuit, 14... Indicator, 15... Drive circuit, 21
...Second level detection circuit, 23...Switch,
IL...Ignition system power line, BL...
Battery type power line.
Claims (1)
およびバツテリ系電源ライＢＬを介してバツテリ
１から給電され、かつバツテリ１の電圧変動を安
定化する電源回路５と、上記バツテリにより充電
されて上記電源回路に電力を供給するバツクアツ
プコンデンサ４と、上記電源回路から給電されて
被測定信号に応じた値を指示する指示計器１４を
駆動する駆動回路１５とよりなる指示計器駆動装
置において、上記イグニツシヨン系電源ラインお
よびバツテリ系電源ラインに入力端子が接続され
て上記両電源ラインがオフ状態になつたことを検
出する電圧レベル検出回路８，２１，２２と、上
記電源回路と上記駆動回路との間の電源ラインに
接続され、上記電圧レベル検出回路からの出力に
基づいて上記駆動回路への電力の供給を遮断する
スイツチ２３とを備えたことを特徴とする指示計
器駆動装置。 Ignition system power line IL in vehicles
and a power supply circuit 5 which is supplied with power from the battery 1 via the battery system power line BL and which stabilizes voltage fluctuations of the battery 1, and a backup capacitor 4 which is charged by the battery and supplies power to the power supply circuit. In an indicator driving device comprising a drive circuit 15 that is supplied with power from the power supply circuit and drives an indicator 14 that indicates a value according to the signal under test, an input terminal is connected to the ignition system power line and the battery system power line. voltage level detection circuits 8, 21, and 22 for detecting that both the power supply lines have been turned off, and a voltage level detection circuit connected to the power supply line between the power supply circuit and the drive circuit, An indicator driving device comprising: a switch 23 that cuts off power supply to the driving circuit based on the output of the switch 23.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12728689U JPH0365974U (en) | 1989-10-31 | 1989-10-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12728689U JPH0365974U (en) | 1989-10-31 | 1989-10-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0365974U true JPH0365974U (en) | 1991-06-26 |
Family
ID=31675048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12728689U Pending JPH0365974U (en) | 1989-10-31 | 1989-10-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0365974U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006027364A (en) * | 2004-07-13 | 2006-02-02 | Pioneer Electronic Corp | Power supply device for vehicle |
-
1989
- 1989-10-31 JP JP12728689U patent/JPH0365974U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006027364A (en) * | 2004-07-13 | 2006-02-02 | Pioneer Electronic Corp | Power supply device for vehicle |
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