公开(公告)号：US08941394B2

公开(公告)日：2015-01-27

申请号：US12895087

申请日：2010-09-30

申请人： Bradley Martin ,  Dazhi Wei

发明人： Bradley Martin ,  Dazhi Wei

IPC分类号： G01R27/26 ,  G06F3/044 ,  G06F3/041

CPC分类号： G06F3/044 ,  G01R27/2605 ,  G06F3/0418

摘要： A system for reducing noise when detecting the capacitance value of a capacitor in a touch display that operates in a potentially noisy environment. A capacitance sensor is provided for determining the size of the capacitor in the touch screen display and includes a charging circuit that charges the capacitor and a discharge circuit that resets the charge of the capacitor to substantially zero. A control circuit controls the capacitance sensor and the operation of the charge and discharge circuits in accordance with a predetermined charging/discharging algorithm to resolve the value of the capacitor and output such value in a sampling operation. The operation of the control circuit and the charging/discharging algorithm is subject to errors as a function of the noisy environment, which errors will be reflected in the output value. A noise reduction circuit is provided to modify the operation of the control circuit to reduce noise.

摘要翻译： 一种用于在检测在潜在嘈杂环境中操作的触摸显示器中的电容器的电容值时降低噪声的系统。 提供电容传感器用于确定触摸屏显示器中的电容器的尺寸，并且包括对电容器充电的充电电路和将电容器的电荷重置为基本为零的放电电路。 控制电路根据预定的充电/放电算法控制电容传感器和充电和放电电路的操作，以解析电容器的值并在采样操作中输出该值。 控制电路和充电/放电算法的操作作为嘈杂环境的函数出现错误，这些错误将反映在输出值中。 提供降噪电路来修改控制电路的操作以减少噪声。

公开(公告)号：US07908500B2

公开(公告)日：2011-03-15

申请号：US11865661

申请日：2007-10-01

申请人： Alan L. Westwick ,  Donelson A. Shannon ,  Dazhi Wei ,  Xiaoling Guo ,  Gabriel Vogel

发明人： Alan L. Westwick ,  Donelson A. Shannon ,  Dazhi Wei ,  Xiaoling Guo ,  Gabriel Vogel

IPC分类号： G06F1/00

CPC分类号： G06F1/3203 ,  G06F1/3243 ,  Y02D10/152

摘要： A microcontroller includes a processing unit having a processing unit having normal power mode of operation and a low power mode of operation. The processing unit further having digital circuitry connected to the processing unit having a plurality of logic circuits associated therewith for processing digital values. A plurality of retention flip-flops are associated with the digital circuitry for storing a logical state of at least one or more of the logic circuits within the digital circuitry when the processing unit enters the low power mode of operation. The plurality of retention flip flops include a first type of transistors for operating in both the low and high power modes of operation and a second type of transistors for operation only in the normal mode of operation and wherein substantially the remainder of the digital circuitry in the processing unit comprises the second type of transistors.

摘要翻译： 微控制器包括具有处理单元的处理单元，该处理单元具有正常的功率操作模式和低功率操作模式。 处理单元还具有连接到处理单元的数字电路，其具有与其相关联的多个逻辑电路以处理数字值。 当处理单元进入低功率操作模式时，多个保持触发器与数字电路相关联，用于存储数字电路内的至少一个或多个逻辑电路的逻辑状态。 多个保持触发器包括用于在低功率和高功率工作模式下操作的第一类型的晶体管，以及用于仅在正常操作模式下操作的第二类型的晶体管，并且其中基本上在其中的数字电路的其余部分 处理单元包括第二类型的晶体管。

公开(公告)号：US20070273411A1

公开(公告)日：2007-11-29

申请号：US10844950

申请日：2004-05-13

申请人： John Harris ,  Du Chen ,  Dazhi Wei ,  Jose Principe

发明人： John Harris ,  Du Chen ,  Dazhi Wei ,  Jose Principe

IPC分类号： H03F3/45

CPC分类号： H03F3/185 ,  H03F3/45183 ,  H03F3/45475 ,  H03F2203/45136 ,  H03F2203/45518 ,  H03F2203/45524 ,  H03F2203/45526 ,  H03F2203/45544 ,  H03M1/60

摘要： An amplifier-based system having pulsed output includes an amplifier for amplifying a time varying voltage signal to produce an output voltage signal. A voltage-to-current (V-I) converter converts the output voltage signal into a current signal. An output stage including a current integrator integrates the current signal to generate an integrated voltage. An amplitude to time converter generates a pulse train from the integrated voltage, wherein a timing of the pulses in the pulse train represents the original time varying voltage signal. The pulse train representation permits transmission and accurate remote reconstruction of the original time varying voltage signal, such as signals generated by electrodes implanted inside a subject, including neural signals.

摘要翻译： 具有脉冲输出的基于放大器的系统包括用于放大时变电压信号以产生输出电压信号的放大器。 电压 - 电流（V-I）转换器将输出电压信号转换为电流信号。 包括电流积分器的输出级积分电流信号以产生积分电压。 振幅到时间转换器从积分电压产生脉冲串，其中脉冲串中的脉冲的定时表示原始时变电压信号。 脉冲串表示允许原始时变电压信号的传输和精确的远程重建，例如植入物体内的电极产生的包括神经信号的信号。

公开(公告)号：US20130221940A1

公开(公告)日：2013-08-29

申请号：US13404558

申请日：2012-02-24

申请人： Shouli Yan ,  Dazhi Wei ,  Alan L. Westwick

发明人： Shouli Yan ,  Dazhi Wei ,  Alan L. Westwick

IPC分类号： G05F1/10

CPC分类号： G05F1/565

摘要： A technique includes using a pass device of a linear regulator to provide an output signal for the linear regulator in response to a signal that is received at a control terminal of the pass device. The control terminal is coupled to a node, and the node is associated with a bias current. The technique includes using a feedback path to communicate a feedback current with the node to regulate the output signal. The use of the feedback path includes regulating a magnitude of the feedback current to be within a range of magnitudes, which include a magnitude that exceeds a magnitude of the bias current.

摘要翻译： 一种技术包括使用线性调节器的通过装置来响应于在通过装置的控制端子处接收到的信号来为线性调节器提供输出信号。 控制终端耦合到节点，节点与偏置电流相关联。 该技术包括使用反馈路径将反馈电流与节点通信以调节输出信号。 反馈路径的使用包括将反馈电流的幅度调节在包括超过偏置电流的幅度的幅度的幅度范围内。

公开(公告)号：US07977816B2

公开(公告)日：2011-07-12

申请号：US12339767

申请日：2008-12-19

申请人： Dazhi Wei

发明人： Dazhi Wei

IPC分类号： H02J3/14

CPC分类号： H02J7/0065 ,  H02M3/156 ,  H02M2001/0022 ,  Y10T307/406

摘要： An integrated circuit package includes a DC/DC boost converter for providing an output voltage at a program level to associated components of the integrated circuit package. The DC/DC boost converter includes a first mode of operation wherein the DC/DC boost converter is enabled responsive to an input battery voltage falling below a programmed level of the output voltage. The DC/DC boost converter also includes a second mode of operation wherein the DC/DC boost converter is disabled responsive to the input battery voltage being above the programmed level of the output voltage.

摘要翻译： 集成电路封装包括用于将程序级的输出电压提供给集成电路封装的相关部件的DC / DC升压转换器。 DC / DC升压转换器包括第一操作模式，其中DC / DC升压转换器响应于低于输出电压的编程电平的输入电池电压而被使能。 DC / DC升压转换器还包括第二操作模式，其中响应于输入电池电压高于输出电压的编程电平，DC / DC升压转换器被禁用。

公开(公告)号：US07873854B2

公开(公告)日：2011-01-18

申请号：US11865654

申请日：2007-10-01

申请人： Alan L. Westwick ,  Dazhi Wei ,  Xiaoling Guo ,  Jia-Hau Liu

发明人： Alan L. Westwick ,  Dazhi Wei ,  Xiaoling Guo ,  Jia-Hau Liu

IPC分类号： G06F1/00

CPC分类号： H03K17/22 ,  H03K17/223

摘要： The single chip microcontroller unit includes a processing unit having normal power mode of operation and a low power mode of operation. Analog circuitry and digital circuitry are connected to the processing unit. A power management unit controls power operations of the processing unit, the analog circuitry and the digital circuitry. Power monitoring circuitry provides power control signals to the power management unit. The power monitoring circuitry further includes a system voltage monitoring circuit for generating a system voltage control signal responsive to a system voltage level with respect to a predetermined level. The power monitoring circuitry also includes a supply monitoring circuit for determining if a chip supply voltage level exceeds a threshold level.

摘要翻译： 单片微控制器单元包括具有正常功率操作模式和低功率操作模式的处理单元。 模拟电路和数字电路连接到处理单元。 电源管理单元控制处理单元，模拟电路和数字电路的功率操作。 电源监控电路向电源管理单元提供电源控制信号。 功率监测电路还包括系统电压监测电路，用于响应于相对于预定电平的系统电压电平来产生系统电压控制信号。 功率监视电路还包括用于确定芯片电源电压电平是否超过阈值电平的电源监控电路。

公开(公告)号：US07873856B2

公开(公告)日：2011-01-18

申请号：US11967389

申请日：2007-12-31

申请人： Alan L. Westwick ,  Dazhi Wei ,  Xiaoling Guo ,  Jia-Hau Liu

发明人： Alan L. Westwick ,  Dazhi Wei ,  Xiaoling Guo ,  Jia-Hau Liu

IPC分类号： G06F1/00 ,  G05F3/02

CPC分类号： H03K17/22 ,  H03K17/223

摘要： The single chip microcontroller unit includes a processing unit having normal power mode of operation and a low power mode of operation. Analog circuitry and digital circuitry are connected to the processing unit. Monitoring circuitry determines if a chip supply voltage level exceeds a threshold level necessary to maintain operation of the digital circuitry.

摘要翻译： 单片微控制器单元包括具有正常功率操作模式和低功率操作模式的处理单元。 模拟电路和数字电路连接到处理单元。 监控电路确定芯片电源电压电平是否超过维持数字电路运行所需的阈值电平。

公开(公告)号：US07768242B2

公开(公告)日：2010-08-03

申请号：US11865645

申请日：2007-10-01

申请人： Dazhi Wei ,  Alan L. Westwick

发明人： Dazhi Wei ,  Alan L. Westwick

IPC分类号： G05F1/10 ,  H02H7/10

CPC分类号： H02M3/156 ,  H02M2001/0009

摘要： A DC to DC boost converter circuit receives a DC input voltage and converts it to a DC output voltage at a different voltage level than the DC input voltage. The DC to DC boost converter includes a switching power converter for receiving the input voltage on an input and converting the input voltage to an output as the DC output voltage in response to pulse control signals. A switching controller generates the pulse control signals during a switching cycle. Current sensing circuitry limits a current passing through the switching power converter. The current sensing circuitry generates an overload signal when the current exceeds a reference value. The current sensing circuitry sensing the current with a current sensing resistor having a size of at least approximately 500 ohms.

摘要翻译： DC-DC升压转换器电路接收DC输入电压并将其转换成与DC输入电压不同的电压电平的DC输出电压。 DC-DC升压转换器包括用于接收输入端的输入电压的开关电源转换器，并且响应于脉冲控制信号将输入电压转换为作为DC输出电压的输出。 开关控制器在开关周期内产生脉冲控制信号。 电流检测电路限制了通过开关电源转换器的电流。 当电流超过参考值时，电流检测电路产生过载信号。 电流感测电路用具有至少约500欧姆的尺寸的电流感测电阻感测电流。

公开(公告)号：US07528590B2

公开(公告)日：2009-05-05

申请号：US11865659

申请日：2007-10-01

申请人： Dazhi Wei

发明人： Dazhi Wei

IPC分类号： G05F1/40

CPC分类号： H02M3/156 ,  H02M2001/0032 ,  Y02B70/16

摘要： A DC to DC boost converter circuit receives a DC input voltage and converts it to a DC output voltage at a different voltage level than the DC input voltage. The DC to DC boost converter includes a switching power converter for receiving the input voltage on an input and converting the input voltage to an output as the DC output voltage in response to pulse control signals. A switching controller generates the pulse control signals during a switching cycle. The switching controller further includes pulse skipping circuitry for generating a pulse width modulated signal to the switching power converter. A pulse width of the pulse width modulated signal is decreased responsive to a voltage level of an output voltage of the DC to DC boost converter being less than a control saw tooth waveform and the pulses width of the pulse width modulated signal is increased responsive to the voltage level of the output voltage of the DC to DC boost converter being greater than the control saw tooth waveform.

摘要翻译： DC-DC升压转换器电路接收DC输入电压并将其转换成与DC输入电压不同的电压电平的DC输出电压。 DC-DC升压转换器包括用于接收输入端的输入电压的开关电源转换器，并且响应于脉冲控制信号将输入电压转换为作为DC输出电压的输出。 开关控制器在开关周期内产生脉冲控制信号。 切换控制器还包括用于产生脉宽调制信号到开关功率转换器的脉冲跳跃电路。 响应于DC至DC升压转换器的输出电压的电压电平小于控制锯齿波形，脉宽调制信号的脉冲宽度减小，脉冲宽度调制信号的脉冲宽度响应于 DC至DC升压转换器的输出电压的电压电平大于控制锯齿波形。

公开(公告)号：US07324035B2

公开(公告)日：2008-01-29

申请号：US10844950

申请日：2004-05-13

申请人： John G. Harris ,  Du Chen ,  Dazhi Wei ,  Jose C. Principe

发明人： John G. Harris ,  Du Chen ,  Dazhi Wei ,  Jose C. Principe

IPC分类号： H03M1/12 ,  A61B5/0476

CPC分类号： H03F3/185 ,  H03F3/45183 ,  H03F3/45475 ,  H03F2203/45136 ,  H03F2203/45518 ,  H03F2203/45524 ,  H03F2203/45526 ,  H03F2203/45544 ,  H03M1/60

摘要： An amplifier-based system having pulsed output includes an amplifier for amplifying a time varying voltage signal to produce an output voltage signal. A voltage-to-current (V-I) converter converts the output voltage signal into a current signal. An output stage including a current integrator integrates the current signal to generate an integrated voltage. An amplitude to time converter generates a pulse train from the integrated voltage, wherein a timing of the pulses in the pulse train represents the original time varying voltage signal. The pulse train representation permits transmission and accurate remote reconstruction of the original time varying voltage signal, such as signals generated by electrodes implanted inside a subject, including neural signals.

摘要翻译： 具有脉冲输出的基于放大器的系统包括用于放大时变电压信号以产生输出电压信号的放大器。 电压 - 电流（V-I）转换器将输出电压信号转换为电流信号。 包括电流积分器的输出级积分电流信号以产生积分电压。 振幅到时间转换器从积分电压产生脉冲串，其中脉冲串中的脉冲的定时表示原始时变电压信号。 脉冲串表示允许原始时变电压信号的传输和精确的远程重建，例如植入物体内的电极产生的包括神经信号的信号。