Charge pump with load driven clock frequency management

    公开(公告)号:US11005483B2

    公开(公告)日:2021-05-11

    申请号:US16987833

    申请日:2020-08-07

    Inventor: Sandor Petenyi

    Abstract: A circuit includes a current controlled oscillator (CCO), and a charge pump circuit boosting a supply voltage to produce a charge pump output voltage at a charge pump output node in response to output from the CCO. A current sensing circuit includes a first resistor coupled between the charge pump output node and an output node, a first transistor having a first conduction terminal coupled to the charge pump output node through a second resistor, and a second conduction terminal coupled to an input of the CCO. A second transistor has a first conduction terminal coupled to the output node, a second conduction terminal coupled to a reference current source, and a control terminal coupled to the control terminal of the first transistor and to the second conduction terminal of the second transistor.

    VOLTAGE REGULATOR WITH CONTROLLED CURRENT CONSUMPTION IN DROPOUT MODE

    公开(公告)号:US20200272184A1

    公开(公告)日:2020-08-27

    申请号:US16285330

    申请日:2019-02-26

    Inventor: Sandor PETENYI

    Abstract: An amplifier stage of an LDO regulator circuit includes an amplifier stage that generates a drive signal in response to a first voltage difference an output voltage of the LDO regulator circuit and a reference voltage. A drive stage having a quiescent current consumption is configured to generate a control signal in response to the drive signal. The control signal is applied to the control terminal of a power transistor. A dropout detector senses whether the LDO regulator circuit is operating in closed loop regulation mode or in open loop dropout mode by sensing a second difference in voltage between the drive signal and the control signal. A quiescent current limiter circuit responds to the sensed second difference by controlling the quiescent current consumption of the drive stage, and in particular limiting current consumption when the LDO regulator circuit is operating in the open loop dropout mode.

    EVALUATION OF TOUCH SCREEN DISPLAY CAPACITANCE USING A TOUCH SCREEN CONTROLLER

    公开(公告)号:US20190310736A1

    公开(公告)日:2019-10-10

    申请号:US15948147

    申请日:2018-04-09

    Abstract: Disclosed is a method for testing touch screen displays during manufacture. A touch screen controller (TSC) is packaged, and the analog channels of the TSC are characterized, with resulting data being stored for later use. The TSC is programmed, and the touch screen display and TSC are packaged together. The touch screen display is tested using firmware in the TSC, enabling calculation of the inherent capacitances between force and sense lines of the touch screen display when connected to the TSC during operation. The testing involves, for each force and sense line pair, measuring an output signal generated by a receive channel of the TSC coupled to the sense line of that pair. Based upon the data gathered during characterization, and the signals measured during testing, the capacity of the touch screen display is then calculated.

    Voltage converter for supplying a semiconductor light source, in particular a LED lamp
    69.
    发明授权
    Voltage converter for supplying a semiconductor light source, in particular a LED lamp 有权
    用于提供半导体光源的电压转换器,特别是LED灯

    公开(公告)号:US08928252B2

    公开(公告)日:2015-01-06

    申请号:US12833280

    申请日:2010-07-09

    Abstract: An embodiment of the disclosure relates to a voltage converter for supplying a semiconductor light source and having at least an input terminal connected to a power supply reference, namely an AC mains voltage reference, and an output terminal providing a current signal to said semiconductor light source, the converter being also connected to a voltage reference and comprising at least a step-down block inserted between a switching node and to the output terminal and connected to the voltage reference and an input block connected to the input terminal, as well as to a first input node and to a first output node of a control circuit, in turn connected to the switching node and to the voltage reference. The input block is a pre-regulator input block and comprises at least a switching component connected to the input terminal and to a capacitive block, in turn inserted between a second input node of the control circuit and the voltage reference, such a switching component having a control terminal connected to the first output node.

    Abstract translation: 本公开的一个实施例涉及一种用于提供半导体光源并且至少具有连接到电源基准的输入端子(即AC电源电压基准)的电压转换器和向所述半导体光源提供电流信号的输出端子 所述转换器还连接到电压基准,并且至少包括插入在开关节点和输出端子之间的降压块,并连接到电压基准和连接到输入端子的输入块,以及一个 第一输入节点和控制电路的第一输出节点,又连接到开关节点和电压基准。 所述输入块是预调节器输入块,并且至少包括连接到所述输入端和电容块的开关元件,所述开关元件依次插入所述控制电路的第二输入节点与所述电压基准之间,所述开关元件具有 连接到第一输出节点的控制终端。

    Capacitive load driving amplifier
    70.
    发明授权
    Capacitive load driving amplifier 有权
    电容式负载驱动放大器

    公开(公告)号:US08897467B2

    公开(公告)日:2014-11-25

    申请号:US12976624

    申请日:2010-12-22

    CPC classification number: H03F3/45183 H03F3/45475

    Abstract: An electronic amplifier for driving a capacitive load may include first and second differential input terminals to receive an input signal, and first and second differential output terminals to provide a differential output signal. The amplifier may further include a first operational device having first and second differential inputs connected to the first and second differential input terminals, respectively, and an output connected to the first differential output terminal, and a second operational device having first and second differential inputs connected to the first and second differential input terminals, respectively, and an output connected to the second differential output terminal. The first and second operational devices may be operatively configured so that both the first and the second output terminals are at a same reference potential during periods in which a magnitude of differential output signal amplitude decreases.

    Abstract translation: 用于驱动电容性负载的电子放大器可以包括用于接收输入信号的第一和第二差分输入端子,以及用于提供差分输出信号的第一和第二差分输出端子。 放大器还可以包括具有分别连接到第一和第二差分输入端子的第一和第二差分输入的第一操作装置和连接到第一差分输出端子的输出端以及连接有第一和第二差分输入的第二操作装置 分别连接到第一和第二差分输入端子,以及连接到第二差分输出端子的输出端。 第一和第二操作装置可以是可操作地配置的,使得在差分输出信号幅度的幅度减小的周期期间,第一和第二输出端都处于相同的参考电位。

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