JPH0344790U - - Google Patents

Info

Publication number
JPH0344790U
JPH0344790U JP10469489U JP10469489U JPH0344790U JP H0344790 U JPH0344790 U JP H0344790U JP 10469489 U JP10469489 U JP 10469489U JP 10469489 U JP10469489 U JP 10469489U JP H0344790 U JPH0344790 U JP H0344790U
Authority
JP
Japan
Prior art keywords
base
ground
switching transistor
whose
resistor
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
Application number
JP10469489U
Other languages
English (en)
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP10469489U priority Critical patent/JPH0344790U/ja
Publication of JPH0344790U publication Critical patent/JPH0344790U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Instrument Panels (AREA)
  • Arrangements Of Lighting Devices For Vehicle Interiors, Mounting And Supporting Thereof, Circuits Therefore (AREA)
  • Audible And Visible Signals (AREA)

Description

【図面の簡単な説明】
第1図は本考案による光源ランプ用の減光回路
の一実施例を示す回路図、第2図は第1図の調光
回路による光源ランプの発光光量を示すグラフで
ある。 10……減光回路、11……光源ランプ、12
,16……抵抗、13,15,18……スイツチ
ングトランジスタ、14,18……入力端子。

Claims (1)

    【実用新案登録請求の範囲】
  1. コレクタが定電圧電源に、またエミツタが光源
    ランプを介してアースに接続され且つベースが第
    一の抵抗を介してコレクタに接続されたスイツチ
    ングトランジスタと、該スイツチングトランジス
    タのベースとアース間に接続され且つ所望のデユ
    ーテイ比のデユーテイパルス信号がトリガー入力
    される第一のスイツチング素子と、前記スイツチ
    ングトランジスタのベースに対して第二の抵抗を
    介してまたアースに対して直接に接続され且つ所
    定のスイツチのオン時に信号がトリガー入力され
    る第二のスイツチング素子とを含んでいることを
    特徴とする、減光回路。
JP10469489U 1989-09-06 1989-09-06 Pending JPH0344790U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10469489U JPH0344790U (ja) 1989-09-06 1989-09-06

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10469489U JPH0344790U (ja) 1989-09-06 1989-09-06

Publications (1)

Publication Number Publication Date
JPH0344790U true JPH0344790U (ja) 1991-04-25

Family

ID=31653480

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10469489U Pending JPH0344790U (ja) 1989-09-06 1989-09-06

Country Status (1)

Country Link
JP (1) JPH0344790U (ja)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4818975B1 (ja) * 1969-09-16 1973-06-09

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4818975B1 (ja) * 1969-09-16 1973-06-09

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