公开(公告)号：US08754708B2

公开(公告)日：2014-06-17

申请号：US13567151

申请日：2012-08-06

Applicant: Ping Lin Liu

Inventor： Ping Lin Liu

IPC: H03F3/45

CPC classification number: H03F1/0205 ,  H03F3/3022 ,  H03F3/45381 ,  H03F2200/408 ,  H03F2203/45674 ,  H03F2203/45728

Abstract: The present invention relates to an operational amplifier comprising an input-stage circuit, a floating current mirror circuit, and an output-stage circuit. The input-stage circuit receives an input signal and produces a control signal. The floating current mirror circuit is coupled to the input-stage circuit, and produces a mirror current according to the control signal. The output-stage circuit is coupled to the floating current mirror circuit, and produces a driving signal according to the mirror current. When the operational amplifier is operating in the static mode, the output-stage circuit further produces a static current according to the mirror current. Thereby, by using the floating current mirror circuit, the purpose of low power consumption can be achieved while driving to the high-voltage mode or to the low-voltage mode.

Abstract translation: 本发明涉及一种运算放大器，包括输入级电路，浮动电流镜电路和输出级电路。 输入级电路接收输入信号并产生控制信号。 浮动电流镜电路耦合到输入级电路，并根据控制信号产生镜电流。 输出级电路耦合到浮动电流镜电路，并根据镜电流产生驱动信号。 当运算放大器工作在静态模式时，输出级电路进一步根据镜电流产生静态电流。 因此，通过使用浮动电流镜电路，可以在驱动到高压模式或低电压模式时实现低功耗的目的。

公开(公告)号：US08957710B2

公开(公告)日：2015-02-17

申请号：US13556716

申请日：2012-07-24

Applicant: Ping Lin Liu

Inventor： Ping Lin Liu

IPC: H03K17/22 ,  G06F1/26 ,  G09G3/36

CPC classification number: G06F1/26 ,  G09G3/3696 ,  G09G2330/021 ,  G09G2330/026 ,  G09G2330/027 ,  Y10S323/901

Abstract: The present relates to a start-up circuit, which is used for starting up a variable power supply circuit, which comprises a detection circuit and a transition circuit. The detection circuit is used for detecting an output voltage of the variable power supply and producing a detection signal. The transition circuit is coupled to the detection circuit. It transits the level of the detection signal and produces a control signal for starting up or cutting off the variable power supply. Thereby, the problem of incapability in transition can be avoided as well as achieving the purpose of low power consumption.

Abstract translation: 本发明涉及一种启动电路，其用于启动包括检测电路和转换电路的可变电源电路。 检测电路用于检测可变电源的输出电压并产生检测信号。 转换电路耦合到检测电路。 它转换检测信号的电平并产生用于启动或切断可变电源的控制信号。 因此，能够避免转移不能力的问题，而且能够实现低功耗的目的。