Original document(12 pages)  中文版
    A current source circuit for driving parallel connection LED includes NMOS ( m 1, m 2 ) constituting electric current specula, a reference current source ( i < sub > b < / sub > ) connected with NMOS ( m 1 ), an operational amplifier operational amplifier ( A1 ), It features leak terminal voltage of MOS ( m 1 ) sampled to positive input end of operational amplifier operational amplifier ( A1 ), leak terminal voltage of MOS ( m 2 ) sampled to operational amplifier ( A1 ) negative input end, outputting of operational amplifier ( A1 ) connected to gate end of NMOS ( m 1 ) and NMOS ( m 2 ). Said invention can ensure driver stage work efficiency and good electric current matched precision between each channel LED.
Application Number
申请号		 200610023333 Application Date
申请日		 2006.01.16
Title 名称 Current source circuit for driving parallel LED
Publication Number
公开号		 1802057 Publication Date
公开日		 2006.07.12
Approval Pub. Date Granted Pub. Date
International Classification 分类号 H05B37/00,H05B33/08
Applicant(s) Name
申请人		 Chiphomer Microelectronics (Shanghai) Co., Ltd.
Address 地址 201103
Inventor(s) Name 发明人 Yu Xingzhi
Attorney & Agent 代理人 zhang weiqiang

  
Electric current source circuit for driving large current load
Parallel connection LED drive circuit with adaptive mode switching
Vehicular flicker frequency matching device capable of replacement bulb-type turn indicator
Current resonance type inverter circuit and power controlling method
Working method and apparatus for air discharge lamp
High-voltage discharge lamp with pulse portfire and driving method thereof
High strength electronic amperite of gas-discharge lamp
Low-voltage energy-saving lamp
Multi lamp tube driving system
Respiration lamp controlling method and its device
Google
Note:All patent data come from State Intellectual Property Office of the People's Republic of China. If there were discrepancies between here and the State Intellectual Property office, the later is more accurate. The patent data is only for public exchange and learning purposes. We are not responsible for the adverse consequences with unverified use of the data.