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    • 2. 发明授权
    • Touch screen measurement circuit and method
    • 触摸屏测量电路及方法
    • US08094135B2
    • 2012-01-10
    • US11556327
    • 2006-11-03
    • Hung-I Chen
    • Hung-I Chen
    • G06F3/045
    • G06F3/045
    • A touch screen digitizing system comprising a touch screen unit and an analog to digital converter. The touch screen unit includes a first resistive sheet with opposing first and second terminals and a second resistive sheet with opposing third and fourth terminals. The first and second resistive sheets are alternatively energized through the first, second, third, and fourth terminals. The analog to digital converter has an input coupled to the third terminal when the first resistive sheet is energized and the second resistive sheet is not, and coupled to the first terminal when the second resistive sheet is energized and the first resistive sheet is not, a first reference terminal dynamically coupled to a first reference voltage, a second reference terminal dynamically coupled to the second reference voltage, and an output terminal providing digital output data.
    • 一种触摸屏数字化系统,包括触摸屏单元和模数转换器。 触摸屏单元包括具有相对的第一和第二端子的第一电阻片和具有相对的第三和第四端子的第二电阻片。 第一和第二电阻片交替地通过第一,第二,第三和第四端子激励。 当第一电阻片通电并且第二电阻片不通电时,模数转换器具有耦合到第三端子的输入,并且当第二电阻片通电并且第一电阻片不是时耦合到第一端子 动态地耦合到第一参考电压的第一参考端子,动态地耦合到第二参考电压的第二参考端子,以及提供数字输出数据的输出端子。
    • 4. 发明申请
    • VOLTAGE REGULATORS
    • 电压调节器
    • US20100033144A1
    • 2010-02-11
    • US12474491
    • 2009-05-29
    • Hung-I ChenChien Wei KuanYen-Hsun Hsu
    • Hung-I ChenChien Wei KuanYen-Hsun Hsu
    • G05F1/10
    • G05F1/56
    • Voltage regulators are provided. In one embodiment of the voltage regulators, a differential amplifier receives a reference voltage and a feedback voltage, to generate a control signal according to a voltage difference between the feedback voltage and the reference voltage. An output transistor has a first terminal coupled to a power voltage, a control terminal coupled to the differential amplifier for receiving the control signal, and a second terminal coupled to an output terminal. A voltage feedback circuit is coupled between the output terminal and a ground voltage to generate the feedback voltage. A discharge transistor has a first terminal coupled to the ground voltage, a control terminal coupled to a first control signal, and a second terminal coupled to the output terminal through a first resistor in the voltage feedback circuit.
    • 提供电压调节器。 在电压调节器的一个实施例中,差分放大器接收参考电压和反馈电压,以根据反馈电压和参考电压之间的电压差产生控制信号。 输出晶体管具有耦合到电源电压的第一端子,耦合到差分放大器的控制端子,用于接收控制信号,以及耦合到输出端子的第二端子。 电压反馈电路耦合在输出端和接地电压之间以产生反馈电压。 放电晶体管具有耦合到接地电压的第一端子,耦合到第一控制信号的控制端子,以及通过电压反馈电路中的第一电阻器耦合到输出端子的第二端子。
    • 5. 发明授权
    • Linear voltage regulating circuit with undershoot minimization and method thereof
    • 具有下冲最小化的线性电压调节电路及其方法
    • US07498780B2
    • 2009-03-03
    • US11739115
    • 2007-04-24
    • Hung-I ChenChih-Hong Lou
    • Hung-I ChenChih-Hong Lou
    • G05F1/40G05F1/56
    • G05F1/571G05F1/575G05F3/262
    • A voltage regulating circuit for providing a regulated output voltage. The voltage regulating circuit includes a voltage regulator, a converting circuit, a capacitive device, a first current mirror module, and a second current mirror module. The voltage regulator has a first output producing the regulated output voltage and a second output producing a pass voltage. The converting circuit converts the pass voltage into a first current and a second current passing through a first converting node and a second converting node respectively, where the first current charges/discharges the capacitive device. The first current mirror module has a first current mirror path coupled to the first converting node and a second current mirror path coupled to the second converting node. The second current mirror module has a first current mirror path coupled to the second converting node and a second current mirror path coupled to the first output.
    • 一种用于提供调节输出电压的电压调节电路。 电压调节电路包括电压调节器,转换电路,电容性装置,第一电流镜模块和第二电流镜模块。 电压调节器具有产生调节输出电压的第一输出和产生通过电压的第二输出。 转换电路将通过电压转换成分别通过第一转换节点和第二转换节点的第一电流和第二电流,其中第一电流对电容性装置充电/放电。 第一当前镜像模块具有耦合到第一转换节点的第一电流镜像路径和耦合到第二转换节点的第二电流镜像路径。 第二电流镜模块具有耦合到第二转换节点的第一电流镜像路径和耦合到第一输出的第二电流镜像路径。
    • 7. 发明授权
    • Programmable/tunable active RC filter
    • 可编程/可调谐有源RC滤波器
    • US07358800B2
    • 2008-04-15
    • US11410096
    • 2006-04-25
    • Chih-Hong LouHung-I Chen
    • Chih-Hong LouHung-I Chen
    • H03K5/00
    • H03H1/02H03H11/1291
    • A programmable/tunable active low-pass filter at least has the resistors, capacitors and shunt control means. It uses the resistor ladder that is structured with various fixed resistors to implement the shunt control means. The cut-off frequency of a filter is associated with the time constant, which is determined by equivalent resistance and equivalent capacitance value in the filter circuit; therefore, the filter of the present invention allowed users to fine tune the cut-off frequency linearly through the shunt control means when the variation of the environment or process parameters of manufacture cause the cut-off frequency drift, thus, the cut-off frequency can be kept in a constant value. The present invention also provides a means for programming the cut-off frequency to a desirous frequency value dependent upon the conditions of application within a big range. Thus, it can be used in many purposes widely with the same filter circuit.
    • 可编程/可调谐有源低通滤波器至少具有电阻器,电容器和分流控制装置。 它使用由各种固定电阻器构成的电阻梯来实现分流控制装置。 滤波器的截止频率与时间常数相关,时间常数由滤波电路中的等效电阻和等效电容值决定; 因此,本发明的滤波器允许用户通过分流控制装置线性地调节截止频率,当制造的环境或工艺参数的变化导致截止频率漂移时,因此截止频率 可以保持恒定值。 本发明还提供一种用于根据大范围内的应用条件将截止频率编程为期望频率值的装置。 因此,它可以广泛用于许多目的,具有相同的滤波电路。
    • 8. 发明授权
    • Miller-compensated amplifier
    • 米勒补偿放大器
    • US07348851B2
    • 2008-03-25
    • US11176177
    • 2005-07-07
    • Hung-I ChenChih-Hong Lou
    • Hung-I ChenChih-Hong Lou
    • H03F1/14H03F3/45
    • H03F3/45183H03F1/086
    • A Miller-compensated amplifier, having an amplifier input and an amplifier output, comprises a first gain stage, a second gain stage, a third gain stage, and a capacitor. The first gain stage has the amplifier input as a first gain stage input thereto and a first gain stage output. The second gain stage has a second gain stage input, coupled to the first gain stage output, and a second gain stage output. The third gain stage has a third gain stage input, coupled to the second gain stage output, and provides an output voltage at the amplifier output. The capacitor is coupled between the amplifier output and the second gain stage input. The second gain stage amplifies a small signal part of a current received thereby and leaves a DC component thereof substantially the same.
    • 具有放大器输入和放大器输出的米勒补偿放大器包括第一增益级,第二增益级,第三增益级和电容器。 第一增益级具有放大器输入作为其输入的第一增益级和第一增益级输出。 第二增益级具有耦合到第一增益级输出的第二增益级输入和第二增益级输出。 第三增益级具有耦合到第二增益级输出的第三增益级输入,并在放大器输出端提供输出电压。 电容器耦合在放大器输出和第二增益级输入之间。 第二增益级放大由此接收的电流的小信号部分,并使其DC分量基本相同。
    • 9. 发明申请
    • SOFT-START CIRCUIT OF LINEAR VOLTAGE REGULATOR AND METHOD THEREOF
    • 线性电压调节器的软启动电路及其方法
    • US20080030177A1
    • 2008-02-07
    • US11461765
    • 2006-08-01
    • Hung-I ChenChih-Hong Lou
    • Hung-I ChenChih-Hong Lou
    • G05F1/00
    • G05F1/46
    • A voltage regulator circuit for providing a substantially constant output voltage is disclosed. The voltage regulator circuit has a voltage regulator, a current sensing and comparing circuit, a capacitive load circuit, and a control circuit. The voltage regulator generates an output current in response to a control signal to provide the output voltage. The current sensing and comparing circuit senses the output current and outputs a result signal according to a sensed output current and a predetermined current value. The control circuit generates the control signal according to the comparison result to limit the output current. The capacitive load circuit provides the control circuit with a first capacitance when the voltage regulator circuit changes from a first mode to a second mode and provides the control circuit with a second capacitance when the voltage regulator circuit changes from the second mode to the first mode.
    • 公开了一种用于提供基本上恒定的输出电压的电压调节器电路。 电压调节器电路具有电压调节器,电流检测和比较电路,电容性负载电路和控制电路。 电压调节器响应于控制信号产生输出电流以提供输出电压。 电流感测和比较电路感测输出电流,并根据感测的输出电流和预定的电流值输出结果信号。 控制电路根据比较结果产生控制信号,以限制输出电流。 当电压调节器电路从第一模式改变到第二模式时,容性负载电路为控制电路提供第一电容,并且当电压调节器电路从第二模式改变到第一模式时,向控制电路提供第二电容。