JPS603133U - Lamp lighting and disconnection detection circuit - Google Patents
Lamp lighting and disconnection detection circuitInfo
- Publication number
- JPS603133U JPS603133U JP9414283U JP9414283U JPS603133U JP S603133 U JPS603133 U JP S603133U JP 9414283 U JP9414283 U JP 9414283U JP 9414283 U JP9414283 U JP 9414283U JP S603133 U JPS603133 U JP S603133U
- Authority
- JP
- Japan
- Prior art keywords
- lamp
- transistor
- lamp lighting
- resistor
- detection circuit
- 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
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来の回路例を示す回路図、及び第２図は本考
案によるランプ点灯及び断線検出回路の一実施例を示す
回路図である。
Ｑｌ・・・スイッチングトランジスタ、Ｑ２・・・ラン
プ断線検出用トランジスタ、Ｑ４・・・駆動用トランジ
スターＳ′・・・ランプ点灯用スイッチ、Ｒ２・・・負
荷抵抗、Ｒ５・・・（第１の）抵抗、Ｒ６・・・（第２
の）抵抗、Ｌｌ、 Ｌシ・・・ランプ。FIG. 1 is a circuit diagram showing an example of a conventional circuit, and FIG. 2 is a circuit diagram showing an embodiment of a lamp lighting and disconnection detection circuit according to the present invention. Ql...Switching transistor, Q2...Lamp disconnection detection transistor, Q4...Drive transistor S'...Lamp lighting switch, R2...Load resistance, R5...(first) Resistor, R6... (second
) Resistor, Ll, L lamp.
Claims (1)
ンプにそれぞれ接続したスイッチングトランジスタを備
え、該スイッチングトラ、ンジスタ゛のベースに駆動用
トランジスタを介して第１の抵抗を接続し、該駆動用ト
ランジスタのベースに第２の抵抗を介してランプ点灯用
スイッチを接続（、前記ランプ点灯用スイッチのオン・
オフにより前記駆動用トランジスタを導通・非導通させ
て前記゛スイッチングトランジスタをオン・オフし、こ
の−０スイッチングトランジスタのオンφオフにより前
記ランプを点灯・不点灯きせると共に、前記負荷−抵抗
とランプの接続点と、前記駆動用トランジスタと前記第
１の抵抗の接続点とにランプ断線検出用トランジスタの
エミッタとベースをそれぞれ接続し、該ランプ断線検出
用トランジスタを前記両接続点間の電位差の増大により
導通させてランプ断線を検出するようにしたことを特徴
とするランプ点灯及び断線検出回路。 ゛A switching transistor is provided, the emitter of which is connected to a DC power source, and the collector of which is connected to a lamp via a load resistor.A first resistor is connected to the base of the switching transistor and the transistor via a driving transistor, and the driving transistor Connect a lamp lighting switch to the base via a second resistor (turn on/off the lamp lighting switch)
By turning off the driving transistor, the switching transistor is turned on and off by turning on and off the driving transistor, and by turning on and off the -0 switching transistor, the lamp is turned on and off, and the load-resistance and the lamp are turned on and off. The emitter and base of a lamp burnout detection transistor are connected to a connection point and a connection point between the drive transistor and the first resistor, respectively, and the lamp breakage detection transistor is A lamp lighting and disconnection detection circuit characterized by detecting a lamp disconnection by making it conductive.゛
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9414283U JPS603133U (en) | 1983-06-21 | 1983-06-21 | Lamp lighting and disconnection detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9414283U JPS603133U (en) | 1983-06-21 | 1983-06-21 | Lamp lighting and disconnection detection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS603133U true JPS603133U (en) | 1985-01-11 |
| JPH0130267Y2 JPH0130267Y2 (en) | 1989-09-14 |
Family
ID=30225487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9414283U Granted JPS603133U (en) | 1983-06-21 | 1983-06-21 | Lamp lighting and disconnection detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS603133U (en) |
-
1983
- 1983-06-21 JP JP9414283U patent/JPS603133U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0130267Y2 (en) | 1989-09-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS603133U (en) | Lamp lighting and disconnection detection circuit | |
| JPS603132U (en) | Lamp lighting and disconnection detection circuit | |
| JPS59125116U (en) | current mirror circuit | |
| JPS605585U (en) | display device | |
| JPS59113926U (en) | pull switch | |
| JPS60160245U (en) | Lamp burnout detection circuit | |
| JPS60168637U (en) | retractable headlamp | |
| JPS5810397U (en) | High frequency fluorescent lamp lighting device | |
| JPS6124290U (en) | key lighting circuit | |
| JPS6011693U (en) | DC motor braking circuit | |
| JPS5923760U (en) | Light emitting diode switching circuit | |
| JPS6056494U (en) | robot | |
| JPS6037936U (en) | Operation display circuit | |
| JPS59163540U (en) | Automotive electronic meter display lighting control device | |
| JPS5893988U (en) | Indicator light control circuit with flicker function | |
| JPS5887296U (en) | Dissimilar lamp disconnection detection circuit | |
| JPS5859295U (en) | Control current reduction circuit for automatic speaker switching | |
| JPS59122687U (en) | display device | |
| JPS60193696U (en) | lighting circuit | |
| JPS5864538U (en) | Strats lamp lighting circuit | |
| JPH02118495U (en) | ||
| JPS5921598U (en) | dimmer circuit | |
| JPS59174738U (en) | Transistor base drive circuit | |
| JPS6038091U (en) | Motor stop device | |
| JPS60121296U (en) | lighting circuit |