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    • 2. 发明申请
    • Led driver current amplifier
    • LED驱动电流放大器
    • US20050152123A1
    • 2005-07-14
    • US10753620
    • 2004-01-08
    • Thomas VoreisSongnian Li
    • Thomas VoreisSongnian Li
    • H05B33/08G03B15/02
    • H05B33/0815H05B33/0851Y02B20/347
    • A circuit powering an electrical device based on a commanded current signal is provided. The circuit includes a linear current amplifier which sets a desired current flow. The circuit also dynamically controls a supply voltage in order to minimize power dissipation of the linear current amplifier. The circuit may also include a voltage drop measurement amplifier, a voltage shaping amplifier, and a switching power supply. The circuit is useful for controlling electrical devices requiring precise current control and minimal power dissipation, for example, driving light-emitting diodes (LEDs) that provide illumination inside the passenger compartment of a vehicle for an imaging occupant detection system.
    • 提供了基于指令的电流信号为电气设备供电的电路。 该电路包括设置所需电流的线性电流放大器。 电路还动态地控制电源电压,以便最小化线性电流放大器的功耗。 电路还可以包括电压降测量放大器,电压整形放大器和开关电源。 该电路可用于控制需要精确电流控制和最小功耗的电气设备,例如驱动在摄像乘客检测系统的车辆乘客室内提供照明的发光二极管(LED)。