公开(公告)号：US20090295352A1

公开(公告)日：2009-12-03

申请号：US12474554

申请日：2009-05-29

申请人： Masahito HAMAYA

发明人： Masahito HAMAYA

IPC分类号： G05F1/10

CPC分类号： G03G15/80

摘要： A power supply unit is provided. An output generation circuit generates an output corresponding to an supplied drive signal and supplies the output to a load. A detection circuit receives the output and generates a detection signal in response to the output. A control circuit generates a digital control signal for controlling a value of the output toward a target value in response to the detection signal. A first D/A conversion circuit receives the digital control signal and converts the digital control signal into an analog control signal, the first D/A conversion circuit being capable of setting a reference range for defining a voltage range of the analog control signal. A driving circuit generates the drive signal in response to the analog control signal and supplies the drive signal to the output generation circuit. A range switching circuit switches the reference voltage range of the first D/A conversion circuit between a wide range and a narrow range narrower than the wide range.

摘要翻译： 提供电源单元。 输出产生电路产生对应于所提供的驱动信号的输出，并将输出提供给负载。 检测电路接收输出并根据输出产生检测信号。 控制电路根据检测信号产生数字控制信号，用于根据目标值控制输出值。 第一D / A转换电路接收数字控制信号并将数字控制信号转换为模拟控制信号，第一D / A转换电路能够设定用于定义模拟控制信号的电压范围的参考范围。 驱动电路响应于模拟控制信号产生驱动信号，并将驱动信号提供给输出发生电路。 范围切换电路在第一D / A转换电路的参考电压范围在宽范围和窄范围之间切换宽范围。