公开(公告)号：US20120126858A1

公开(公告)日：2012-05-24

申请号：US13296429

申请日：2011-11-15

申请人： Yasutaka SENDA ,  Ryotaro MIURA ,  Kazuki YAMAUCHI

发明人： Yasutaka SENDA ,  Ryotaro MIURA ,  Kazuki YAMAUCHI

IPC分类号： G05F1/10 ,  H03K3/00

CPC分类号： H03K17/0406 ,  G05F1/561 ,  H03K17/163 ,  H03K17/168 ,  H03K2217/0036

摘要： A load driving apparatus for driving a load with a constant current includes a shunt resistor and a driver circuit. A shunt current corresponding to the constant current flows though the shunt resistor. The driver circuit is connected to a first end of the shunt resistor to supply the constant current corresponding to the shunt current to the load. The driver circuit includes a reference voltage source for generating a predetermined reference voltage. The driver circuit adjusts the magnitude of the constant current by performing a feedback-control of the magnitude of the shunt current in such a manner that a first voltage corresponding to the reference voltage and a second voltage corresponding to a voltage at the first end of the shunt resistor become equal to each other.

摘要翻译： 用于以恒定电流驱动负载的负载驱动装置包括分流电阻器和驱动器电路。 对应于恒流的分流电流流过分流电阻。 驱动电路连接到分流电阻的第一端，以将与分流电流相对应的恒定电流提供给负载。 驱动器电路包括用于产生预定参考电压的参考电压源。 驱动器电路通过对分流电流的大小进行反馈控制来调整恒定电流的大小，使得对应于参考电压的第一电压和对应于参考电压的第一端的电压的第二电压 分流电阻互相相等。