公开(公告)号：US20080258834A1

公开(公告)日：2008-10-23

申请号：US11737529

申请日：2007-04-19

申请人： CHEN-FAN TANG ,  CHENG-CHIH WANG ,  JONG-PING LEE ,  YI-CHE LIN ,  LIAN-CHENG TSAI ,  GUAN-HONG CHOU

发明人： CHEN-FAN TANG ,  CHENG-CHIH WANG ,  JONG-PING LEE ,  YI-CHE LIN ,  LIAN-CHENG TSAI ,  GUAN-HONG CHOU

IPC分类号： H03K7/08 ,  H02H3/08

CPC分类号： H03K7/08 ,  H02M1/36

摘要： A pulse width modulation (PWM) circuit includes a turn on/off switch and a PWM controller. The first terminal of the turn on/off switch is coupled to a turn off voltage. The control terminal of the turn on/off switch receives a turn on/off signal to decide whether the circuit between the first terminal and the second terminal of the turn on/off switch is turned on or not. The PWM controller includes a PWM pin and a turn on/off device. The PWM pin is coupled to the second terminal of the turn on/off switch to output a PWM signal. The turn on/off device is coupled to the PWM pin to decide the turn on/off of the PWM controller according to a signal swing state of the PWM pin.

摘要翻译： 脉宽调制（PWM）电路包括开/关开关和PWM控制器。 开/关开关的第一端耦合到关断电压。 开/关开关的控制端子接收打开/关闭信号，以确定开/关开关的第一端子和第二端子之间的电路是否接通。 PWM控制器包括一个PWM引脚和一个开/关设备。 PWM引脚耦合到开/关开关的第二端，以输出PWM信号。 打开/关闭装置与PWM引脚耦合，根据PWM引脚的信号摆幅状态来决定PWM控制器的导通/截止。

公开(公告)号：US06275947B1

公开(公告)日：2001-08-14

申请号：US09286141

申请日：1999-04-05

申请人： Cheng-Chih Wang

发明人： Cheng-Chih Wang

IPC分类号： G06F126

CPC分类号： G06F1/3215 ,  G06F1/26 ,  G06F3/16

摘要： A controller circuit and a method to wake up or turn on a computer system by a peripheral device comprising a MIDI port. When the computer system is in a standby or an off state, a certain value or combination of the peripheral device is preset as a default value. Inputting a certain signal to the peripheral device, the wake up/turn on function can be achieved.

摘要翻译： 一种由包括MIDI端口的外围设备唤醒或打开计算机系统的控制器电路和方法。 当计算机系统处于待机或关闭状态时，外部设备的某个值或组合被预设为默认值。 向外围设备输入一定的信号，可以实现唤醒/打开功能。

公开(公告)号：US5886640A

公开(公告)日：1999-03-23

申请号：US977538

申请日：1997-11-25

申请人： Cheng-Chih Wang ,  Angel Huang ,  Der-Shyun Huang

发明人： Cheng-Chih Wang ,  Angel Huang ,  Der-Shyun Huang

IPC分类号： G01R21/00 ,  G01R21/133 ,  G05F1/10 ,  G06F1/28 ,  G06F1/30 ,  G08B21/00

CPC分类号： G06F1/30

摘要： A power monitoring circuit for monitoring the power being supplied to a central processing unit (CPU) is provided. This power monitoring circuit can adaptively adjust for a suitable power level corresponding to the power rating of the CPU. The CPU on which the power monitoring circuit is used should be of the type having a factory-preset built-in power-rating code that indicates the tolerable power range acceptable by the CPU. The power monitoring circuit includes decoding means that can decode the power-rating code into a bottom-limit reference value and an bottom-limit reference value which indicate respectively the bottom and upper limits of the tolerable power range acceptable by the CPU. Further, the power monitoring circuit includes means for comparing the magnitude of the power being supplied to the CPU against the bottom-limit reference value and the bottom-limit reference value to see if the power is within the tolerable power range acceptable by the CPU. If not, a power-fault signal is generated, which can be used by a power control circuit to perform a feedback control that adjusts the power being supplied to the CPU to within the tolerable power range acceptable by the CPU. If the power control circuit is unable to adjust the power to within the tolerable power range acceptable by the CPU, an audible alarm sound is generated to notify the user or any personnel nearby to take necessary repair actions.

摘要翻译： 提供了用于监视供应给中央处理单元（CPU）的电力的电力监控电路。 该电力监控电路可以适应于与CPU额定功率相对应的适当功率电平。 使用电源监控电路的CPU应具有出厂预设的内置功率额定值类型，表示CPU可接受的容许功率范围。 功率监视电路包括能够将功率额定码解码为底限参考值的解码装置和分别指示CPU可接受的容许功率范围的下限和上限的底限参考值。 此外，功率监视电路包括用于将供给CPU的功率的大小与下限参考值和底限参考值进行比较的装置，以查看功率是否在CPU可接受的容许功率范围内。 如果不是，则产生电源故障信号，其可由功率控制电路使用以执行反馈控制，该反馈控制将提供给CPU的功率调整到CPU可接受的容许功率范围内。 如果电源控制电路不能将电源调整到CPU可接受的容许功率范围内，则会产生声音报警声，通知用户或附近的任何人员进行必要的维修操作。

公开(公告)号：US20120133376A1

公开(公告)日：2012-05-31

申请号：US13267107

申请日：2011-10-06

申请人： Cheng-Chih Wang

发明人： Cheng-Chih Wang

IPC分类号： G01R27/26

CPC分类号： H03K17/962 ,  G01D5/24 ,  G06F3/0416 ,  G06F3/044 ,  H03K2217/960725 ,  H03K2217/960745

摘要： A sensing device includes an oscillator, a driver, a switch, a counter and a timer. The oscillator includes an input coupled to a reference capacitor. The driver alternately sources and sinks current in accordance with an oscillation signal outputted by the oscillator. The switch connects or disconnects the reference capacitor with a sensing capacitor. The counter counts value for the oscillation signal. The timer counts operation periods respectively when the switch connects the reference capacitor with the sensing capacitor and when the switch disconnects the reference capacitor with the sensing capacitor, and the counter counts values corresponding to conditions of the switch connecting and disconnecting the reference capacitor with the sensing capacitor during the operation periods, respectively.

摘要翻译： 感测装置包括振荡器，驱动器，开关，计数器和计时器。 振荡器包括耦合到参考电容器的输入端。 驱动器根据振荡器输出的振荡信号交替地吸收电流。 开关用感测电容器连接或断开参考电容。 计数器计数振荡信号的值。 当开关将参考电容器与感应电容器连接时，以及当开关用感测电容器断开参考电容器时，定时器分别计数运行周期，并且计数器对应于开关连接和断开参考电容器的条件与传感器 电容器分别在运行期间。

公开(公告)号：US06202161B1

公开(公告)日：2001-03-13

申请号：US09448451

申请日：1999-11-24

申请人： Cheng-Chih Wang

发明人： Cheng-Chih Wang

IPC分类号： G06F126

CPC分类号： G06F21/81 ,  G06F1/26 ,  G06F3/023 ,  G06F21/83

摘要： A computer system power-on security control apparatus is described to provide shielding against unauthorized access to the computer systems. Firmware-level protection is provided instead of the conventional implementation at the operating system level. Repeated power-on and -off cycles inevitable in the process of trial entry of the password of the computer system can be avoided altogether, reducing the risk of potential damages to delicate subsystems in the computer while repeated trial of the password is attempted.

摘要翻译： 描述了一种计算机系统上电安全控制装置，以防止未经授权的访问计算机系统。 提供固件级保护，而不是在操作系统级别的常规实现。 可以在计算机系统的密码试用过程中不可避免地重复上电和关机循环，降低了尝试重复尝试密码时计算机中微妙子系统潜在损坏的风险。

公开(公告)号：US06170027A

公开(公告)日：2001-01-02

申请号：US09186956

申请日：1998-11-05

申请人： Max Lu ,  Cheng-Chih Wang

发明人： Max Lu ,  Cheng-Chih Wang

IPC分类号： G06F1300

CPC分类号： G06F13/4018

摘要： A LPC/ISA bridge and its bridging method are disclosed for bridging an LPC interface to an ISA interface. The LPC/ISA bridge is activated in response to a duty cycle indicative signal (LFRAME#), and serially transforms related command, address and data information from command/address/data lines (LAD[3:0]) of the LPC interface into address, data and control signals of the ISA interface. Therefore, the problem as to the interface incompatibility is solved.

摘要翻译： 公开了用于将LPC接口桥接到ISA接口的LPC / ISA桥及其桥接方法。 响应于占空比指示信号（LFRAME＃），LPC / ISA桥被激活，并将相关命令，地址和数据信息从LPC接口的命令/地址/数据线（LAD [3：0]）串行转换成 地址，数据和控制信号。 因此，解决了接口不兼容的问题。

公开(公告)号：US06128744A

公开(公告)日：2000-10-03

申请号：US210574

申请日：1998-12-14

申请人： Cheng-Chih Wang

发明人： Cheng-Chih Wang

IPC分类号： G06F1/00 ,  G06F1/24 ,  G06F21/34 ,  G06F21/81 ,  G06F1/26 ,  G06F12/14 ,  H04L9/00 ,  H04L9/32

CPC分类号： G06F21/81 ,  G06F1/24 ,  G06F21/34

摘要： A computer starter and starting method for an ATX computer system which provides a standby voltage when the computer system is shut down. The computer starter takes the standby signal as its power supply and includes a smart card interface, a clock generator, a non-volatile memory, a micro-controller and a power control circuit. The smart card interface generates an enable signal upon insertion of a smart card. The clock generator generates a reference clock in response to the enable signal. The non-volatile memory stores a computer identification signal. The micro-controller resets the smart card, reads a user identification signal stored in the smart card, and generates a verification signal when the computer identification signal stored in the non-volatile memory matches the user identification signal stored in the smart card. The power control circuit generates a start signal in response to the verification signal so as to start the computer system.

摘要翻译： 一种用于ATX计算机系统的计算机启动器和启动方法，其在计算机系统关闭时提供备用电压。 计算机启动器将待机信号作为其电源，并且包括智能卡接口，时钟发生器，非易失性存储器，微控制器和功率控制电路。 智能卡接口在插入智能卡时产生使能信号。 时钟发生器响应于使能信号产生参考时钟。 非易失性存储器存储计算机识别信号。 微控制器复位智能卡，读取存储在智能卡中的用户识别信号，并且当存储在非易失性存储器中的计算机识别信号与存储在智能卡中的用户识别信号匹配时，生成验证信号。 功率控制电路响应于验证信号产生起始信号，以启动计算机系统。

公开(公告)号：US07188235B2

公开(公告)日：2007-03-06

申请号：US10624804

申请日：2003-07-22

申请人： Cheng-Chih Wang ,  Meng-Chyi Wu

发明人： Cheng-Chih Wang ,  Meng-Chyi Wu

IPC分类号： G06F9/00 ,  G06F9/24 ,  G06F15/177

CPC分类号： G06F9/4401 ,  G06F15/177

摘要： A method for initiating a computer system through a memory card is provided. The computer system includes a memory card reading device, a control circuit, and a basic input-output system memory. The method includes steps of providing the memory card storing therein a basic input-output system, inserting the memory card into the memory card reading device, selecting a path of initiating the computer system through the memory card, disabling the basic input-output system memory by the control circuit, and initiating the computer system through reading the basic input-output system by the control circuit.

摘要翻译： 提供了一种通过存储卡启动计算机系统的方法。 计算机系统包括存储卡读取装置，控制电路和基本输入 - 输出系统存储器。 该方法包括以下步骤：将存储卡存储在其中的基本输入输出系统，将存储卡插入存储卡读取装置，选择通过存储卡启动计算机系统的路径，禁用基本输入 - 输出系统存储器 并通过控制电路读取基本输入输出系统来启动计算机系统。

公开(公告)号：US06298447B1

公开(公告)日：2001-10-02

申请号：US09118895

申请日：1998-07-20

申请人： Cheng-Chih Wang

发明人： Cheng-Chih Wang

IPC分类号： H04K100

CPC分类号： G06F21/31 ,  G06F21/81 ,  G06F21/83

摘要： A computer system power-on security control that does not allow a computer power source to turn on until a valid passcode is entered. The system includes a mouse intercept unit for intercepting mouse signals directed to a mouse controller in the computer system when the power source is off. A memory stores valid passcodes used to power on the computer system. A comparator unit is configured to compare received mouse signals to the stored passcodes. A power supply control unit, connected to the comparator unit, outputs a power control signal to turn on the computer system power source when the mouse signals match the stored passcode.

摘要翻译： 计算机系统开机安全控制，在输入有效密码之前，不允许计算机电源打开。 该系统包括一个鼠标拦截单元，用于当电源关闭时拦截指向计算机系统中的鼠标控制器的鼠标信号。 存储器存储用于打开计算机系统的有效密码。 比较器单元被配置为将接收到的鼠标信号与存储的密码进行比较。 连接到比较器单元的电源控制单元输出电源控制信号，以在鼠标信号与存储的密码匹配时打开计算机系统电源。

公开(公告)号：US06272645B1

公开(公告)日：2001-08-07

申请号：US09191799

申请日：1998-11-13

申请人： Cheng-Chih Wang

发明人： Cheng-Chih Wang

IPC分类号： G06F130

CPC分类号： G06F1/3215

摘要： An operation mode for waking up a system predetermined by a user is stored before the system is in standby mode. After the system is in standby mode, the peripherals and the peripheral controller are separated to prevent the peripheral controller from receiving the output signal from the peripherals. The wake-up control circuit then receives the output signal from the peripherals. In the standby mode, if the output signal from the peripherals is consistent with the user's predetermined operation mode, the system is woken up by the wake-up control circuit and returns to the normal operation mode.

摘要翻译： 在系统处于待机模式之前，存储用于唤醒用户预定的系统的操作模式。 系统处于待机模式后，外围设备和外设控制器分开，以防外设控制器从外设接收输出信号。 然后，唤醒控制电路从外设接收输出信号。 在待机模式下，如果来自外围设备的输出信号与用户的预定操作模式一致，则系统由唤醒控制电路唤醒并返回到正常操作模式。