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    Touch screen display circuit and voltage measurement circuit
    11.
    发明授权
    Touch screen display circuit and voltage measurement circuit 有权
    触摸屏显示电路和电压测量电路

    公开(公告)号：US06961015B2

    公开(公告)日：2005-11-01

    申请号：US10295559

    申请日：2002-11-14

    Applicant: Kent Kernahan ,  John Carl Thomas

    Inventor： Kent Kernahan ,  John Carl Thomas

    IPC: G05F3/26 ,  H02J7/00 ,  H02M1/084 ,  H02M3/156 ,  H02M3/157 ,  H02M3/158 ,  H03M5/08 ,  H03M1/34

    CPC classification number: H02M3/157 ,  G05F3/262 ,  H02J7/0065 ,  H02M1/0845 ,  H02M3/156 ,  H02M3/1588 ,  H02M2001/0012 ,  H02M2001/007 ,  H02M2001/008 ,  H03M5/08 ,  H05B41/2828 ,  Y02B20/186 ,  Y02B70/1466 ,  Y10T307/438 ,  Y10T307/469

    Abstract: A touch screen display circuit is disclosed which includes means for measuring a voltage at two separate input terminals which represent a location on a touch screen where pressure was applied. The display circuit includes means for defining a time period during which the voltage is measured and means for converting the measured voltage to a digital value. The means for measuring a voltage includes an amplifier and a capacitor which are configured as an integrator. The means for converting comprises a counter that measures an amount of time required for the capacitor to dissipate its charge. A touch screen display system having a touch screen which includes first and second sheets of conductive materials positioned in a spaced apart relationship is disclosed. The touch screen display system utilizes a means coupled to the first and second sheets for measuring a voltage at two separate input terminals, a means for defining a time period during which the voltage is measured and a means for converting the voltage to a digital value.

    Abstract translation: 公开了一种触摸屏显示电路，其包括用于测量两个单独输入端子处的电压的装置，其表示施加压力的触摸屏上的位置。 显示电路包括用于定义测量电压的时间段的装置和用于将所测量的电压转换为数字值的装置。 用于测量电压的装置包括被配置为积分器的放大器和电容器。 用于转换的装置包括测量电容器消耗其电荷所需的时间量的计数器。 公开了具有触摸屏的触摸屏显示系统，该触摸屏包括以间隔开的关系定位的第一和第二导电材料片。 触摸屏显示系统利用耦合到第一和第二片材的装置来测量两个分离的输入端子处的电压，用于限定测量电压的时间段的装置和用于将电压转换为数字值的装置。

    Power converter circuitry and method
    16.
    发明申请
    Power converter circuitry and method 有权

    公开(公告)号：US20040095112A1

    公开(公告)日：2004-05-20

    申请号：US10295566

    申请日：2002-11-14

    Inventor： Kent Kernahan ,  David F. Fraser ,  Jack Roan

    IPC: G05F001/40

    CPC classification number: H02M1/0845

    Abstract: A control system and method for simultaneously regulating the operation of a plurality of different types of switching power converters. The system utilizes in regulating the power converters sampled data and nonlinear feedback control loops.

    Current limiting technique for a switching power converter
    18.
    发明授权
    Current limiting technique for a switching power converter 失效
    开关电源转换器的限流技术

    公开(公告)号：US06674272B2

    公开(公告)日：2004-01-06

    申请号：US10177557

    申请日：2002-06-21

    Applicant: Jeffrey H. Hwang

    Inventor： Jeffrey H. Hwang

    IPC: G05F140

    CPC classification number: H02M1/4225 ,  H02M1/0845 ,  H02M1/092 ,  H02M1/32 ,  H02M1/36 ,  H02M3/33523 ,  H02M2001/007 ,  Y02B70/126 ,  Y02P80/112 ,  Y10S323/901 ,  Y10S323/908

    Abstract: An improved technique for limiting current in a switching power converter. The switching power converter includes a soft-start circuit which slowly increases a switching duty cycle upon power-up. Once the converter is operating normally, the duty cycle is controlled to regulate the output voltage. In the event an excessive output current is detected, soft-start circuit is controlled to reduce the switching duty cycle. More particularly, a soft-start capacitor may be discharged during portions of a clock period used to control switching.

    Abstract translation: 一种用于限制开关电源转换器中的电流的改进技术。 开关电源转换器包括在启动时缓慢增加开关占空比的软启动电路。 一旦转换器正常工作，就控制占空比来调节输出电压。 在检测到过大的输出电流的情况下，控制软启动电路以减少开关占空比。 更具体地，软启动电容器可以在用于控制切换的时钟周期的部分期间放电。

    Semiconductor device
    19.
    发明申请
    Semiconductor device 失效

    公开(公告)号：US20030206039A1

    公开(公告)日：2003-11-06

    申请号：US10417206

    申请日：2003-04-17

    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA

    Inventor： Hiroshi Sakata ,  Toru Araki

    IPC: H03B001/00

    CPC classification number: H02M1/32 ,  H02M1/08 ,  H02M1/0845 ,  H02M7/53873 ,  H02M2001/0012 ,  H03K17/0828 ,  H03K17/14 ,  H03K17/168 ,  H03K2017/0806

    Abstract: As devices are often different in the characteristics from one another, semiconductor chips based on the devices have discrepancies in the performance. A semiconductor device having a semiconductor switching element and a drive controlling means (1) for generating from input signals (A) and (B) drive signals (a) and (b) to control the action of the semiconductor switching element is provided comprising a characteristic compensating means (2) for generating from a characteristic compensation input signal a compensation signal to eliminate variations in the transmission delay time of the drive controlling means (1).

    Current inrush limiting and bleed resistor current inhibiting in a switching power converter
    20.
    发明申请
    Current inrush limiting and bleed resistor current inhibiting in a switching power converter 失效
    开关电源转换器中的电流浪涌抑制和泄放电阻电流抑制

    公开(公告)号：US20020196644A1

    公开(公告)日：2002-12-26

    申请号：US10177558

    申请日：2002-06-21

    Applicant: Champion Microelectronic Corp.

    Inventor： Jeffrey H. Hwang

    IPC: H02M007/68

    CPC classification number: H02M1/4225 ,  H02M1/0845 ,  H02M1/092 ,  H02M1/32 ,  H02M1/36 ,  H02M3/33523 ,  H02M2001/007 ,  Y02B70/126 ,  Y02P80/112 ,  Y10S323/901 ,  Y10S323/908

    Abstract: A current inrush limiting technique for a switching power converter. In one aspect, a switching power converter includes a main power switch and a current sensor. When the input current exceeds a first threshold, the main power switch is opened. When the input current exceeds a second threshold, higher than the first threshold, a current-limiting resistance is coupled to receive the input current. Accordingly, the input current is limited in two stages by two different techniques. In another aspect, a bleed resistor receives current from a power source for providing power to a controller for the power converter. After start-up, such as when an output voltage of the power converter is available to provide power to the controller, the current-limiting resistor is shorted and the bleed resistor is effectively removed. A single pin of an integrated circuit controller controls shorting of the current-limiting resistor and removal of the bleed resistor.

    Abstract translation: 一种开关电源转换器的电涌涌流限制技术。 一方面，开关电源转换器包括主电源开关和电流传感器。 当输入电流超过第一阈值时，主电源开关打开。 当输入电流超过高于第一阈值的第二阈值时，耦合限流电阻以接收输入电流。 因此，通过两种不同的技术将输入电流分为两个阶段。 在另一方面，泄放电阻器从电源接收电流以向功率转换器的控制器提供电力。 在启动之后，例如当功率转换器的输出电压可用于向控制器供电时，限流电阻器短路，并且有效地去除放电电阻器。 集成电路控制器的单引脚控制限流电阻的短路和去除放电电阻。

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