JPH03118135U - - Google Patents
Info
- Publication number
- JPH03118135U JPH03118135U JP2727090U JP2727090U JPH03118135U JP H03118135 U JPH03118135 U JP H03118135U JP 2727090 U JP2727090 U JP 2727090U JP 2727090 U JP2727090 U JP 2727090U JP H03118135 U JPH03118135 U JP H03118135U
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- transistor
- lamp
- detection circuit
- power source
- 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
- 238000001514 detection method Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 1
Description
第１図は本考案の一実施例に係るランプ切れ検
出回路の構成を示す図、第２図は従来のランプ切
れ検出回路を利用して複数のランプの切れを検出
するようにした例を示す図、第３図は電源電圧の
変動に伴う検出用の基準電圧と検出電圧の変化を
示す図である。
５２……電源、５４……スイツチ、５６……第
１の抵抗、５８……ランプ群、６０……第１のト
ランジスタ、６２……第２の抵抗、６４……第３
の抵抗、６６……第４の抵抗、６８……第２のト
ランジスタ、７０……第５の抵抗、７２……第６
の抵抗、７４……ダイオード、７６……第７の抵
抗。
FIG. 1 shows the configuration of a lamp burnout detection circuit according to an embodiment of the present invention, and FIG. 2 shows an example in which a conventional lamp burnout detection circuit is used to detect burnout of a plurality of lamps. 3 are diagrams showing changes in the reference voltage for detection and the detection voltage due to fluctuations in the power supply voltage. 52... Power source, 54... Switch, 56... First resistor, 58... Lamp group, 60... First transistor, 62... Second resistor, 64... Third
resistor, 66... fourth resistor, 68... second transistor, 70... fifth resistor, 72... sixth resistor
resistor, 74... diode, 76... seventh resistor.
Claims (1)
に対して直列に接続された第１の抵抗及びランプ
と、 該ランプに印加される電圧によつてオンオフ制
御され、それぞれコレクタ側及びエミツタ側に第
２の抵抗及び第３の抵抗が接続され、ベース側が
第４の抵抗を介して前記ランプと第１の抵抗の接
続点に接続された第１のトランジスタと、 該第１のトランジスタのオンオフによつて制御
される第２のトランジスタと、 該第２のトラジスタのコレクタ側に接続された
第５の抵抗と、 前記第１のトランジスタのコレクタと第２のト
ランジスタのベースとの間に接続された第６の抵
抗と、 前記第１のトランジスタのエミツタ側と第２の
抵抗にこれらに対して並列に接続されたダイオー
ドと、からなり、 前記第１のトランジスタにより検出されたラン
プ切れを前記第５の抵抗の両端の電圧値により示
すランプ切れ検出回路において、 前記ダイオードと第１のトランジスタのエミツ
タとの間に第７の抵抗を接続したことを特徴とす
るランプ切れ検出回路。[Claims for Utility Model Registration] A power source, a switch connected in series to the power source, a first resistor and a lamp connected in series to the power source and the switch, respectively; A second resistor and a third resistor are connected to the collector side and the emitter side, respectively, and the base side is connected to the connection point between the lamp and the first resistor via the fourth resistor. a first transistor connected to the first transistor; a second transistor controlled by turning on and off the first transistor; a fifth resistor connected to the collector side of the second transistor; a sixth resistor connected between the collector of the transistor and the base of the second transistor; a diode connected in parallel to the emitter side of the first transistor and the second resistor; In a lamp burnout detection circuit that indicates a lamp burnout detected by the first transistor by a voltage value across the fifth resistor, a seventh resistor is provided between the diode and the emitter of the first transistor. A lamp burnout detection circuit characterized in that a lamp burnout detection circuit is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2727090U JPH067984Y2 (en) | 1990-03-19 | 1990-03-19 | Lamp burnout detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2727090U JPH067984Y2 (en) | 1990-03-19 | 1990-03-19 | Lamp burnout detection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03118135U true JPH03118135U (en) | 1991-12-05 |
| JPH067984Y2 JPH067984Y2 (en) | 1994-03-02 |
Family
ID=31530133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2727090U Expired - Lifetime JPH067984Y2 (en) | 1990-03-19 | 1990-03-19 | Lamp burnout detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH067984Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008253716A (en) * | 2007-04-06 | 2008-10-23 | Kunihiro Uekami | Golf putter |
-
1990
- 1990-03-19 JP JP2727090U patent/JPH067984Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008253716A (en) * | 2007-04-06 | 2008-10-23 | Kunihiro Uekami | Golf putter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH067984Y2 (en) | 1994-03-02 |