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1. 发明授权

US08258852B2 Bootstrapped high-side driver control without static DC current for driving a motor bridge circuit 有权
标题翻译：引导式高边驱动器控制，无静态直流电流，用于驱动电机桥电路
公开(公告)号：US08258852B2
公开(公告)日：2012-09-04
申请号：US12948890
申请日：2010-11-18
申请人： Lap Chi David Leung , Yat Tung Lai , Chun Fai Wong , Kam Hung Chan , Kwok Kuen David Kwong
发明人： Lap Chi David Leung , Yat Tung Lai , Chun Fai Wong , Kam Hung Chan , Kwok Kuen David Kwong
IPC分类号： H03K17/16
CPC分类号： H03K17/063 , H02P7/04 , H03K17/0822 , H03K2217/0036 , H03K2217/0063
摘要： A motor driver circuit for driving the gate node of a high-side driver transistor to a boosted voltage from a charge pump draws little or no static current from the charge pump. The gate node is pulled to the boosted voltage by a p-channel pullup-control transistor that is driven by p-channel transistors that are pumped by capacitors that cut off current flow to ground from the charge pump. An n-channel output-shorting transistor shorts the gate node to the output when the high-side driver is turned off. A coupling capacitor initializes the shorting transistor for each output transition. A p-channel output-sensing transistor generates a feedback to a second stage that drives the coupling capacitor. P-channel diode transistors and an n-channel equalizing transistor control the voltage on the coupling capacitor.
摘要翻译：用于将高侧驱动晶体管的栅极节点驱动到来自电荷泵的升压电压的电动机驱动器电路很少或没有来自电荷泵的静态电流。栅极节点被p沟道上拉控制晶体管拉到升压电压，该p沟道上拉控制晶体管由p沟道晶体管驱动，该p沟道晶体管由电容器泵浦，该电流从电荷泵截止电流流向地电。当高侧驱动器关闭时，n沟道输出短路晶体管将栅极节点短路到输出。耦合电容器为每个输出跃迁初始化短路晶体管。 p沟道输出感测晶体管产生反馈到驱动耦合电容器的第二级。 P沟道二极管晶体管和n沟道均衡晶体管控制耦合电容器上的电压。

2. 发明授权

US08179455B2 Optical black-level cancellation for optical sensors using open-loop sample calibration amplifier 有权
标题翻译：使用开环采样校准放大器的光学传感器的光学黑电平消除
公开(公告)号：US08179455B2
公开(公告)日：2012-05-15
申请号：US12722148
申请日：2010-03-11
申请人： Lap Chi (David) Leung , Yat Tung Lai , Chun Fai Wong , Kam Hung Chan , Kwok Kuen (David) Kwong
发明人： Lap Chi (David) Leung , Yat Tung Lai , Chun Fai Wong , Kam Hung Chan , Kwok Kuen (David) Kwong
IPC分类号： H04N5/217
CPC分类号： H04N5/361 , H04N5/3575
摘要： A Optical Black Pixel (OBP) cancellation circuit corrects offsets in sensors in a CCD/CMOS image sensor when reading dark pixels such at the periphery. A pixel voltage is switched to a sampling capacitor during two phases of the same pixel pulse. Sampling capacitors and feedback capacitors connect to differential inputs of an amplifier. An accumulating capacitor accumulates voltage differences and generates a common-mode voltage that is fed back to another sampling capacitor that stores an amplifier offset. The sampling capacitor and accumulating capacitor and their associated switches form a discrete-time first-order low-pass filter that filters the pixel voltage during the first phase. In the second phase the amplifier acts as a unity-gain amplifier to output an average of the pixel voltage differences generated during an OBP time when blackened or covered pixels are read from the image sensor.
摘要翻译：当在外围读取暗像素时，光学黑色像素（OBP）消除电路校正CCD / CMOS图像传感器中的传感器的偏移。在相同像素脉冲的两个相位期间，将像素电压切换到采样电容器。采样电容器和反馈电容器连接到放大器的差分输入。累积电容器累积电压差并产生反馈到存储放大器偏移的另一采样电容器的共模电压。采样电容器和累加电容器及其相关的开关形成离散时间一阶低通滤波器，其在第一阶段期间对像素电压进行滤波。在第二阶段，放大器用作单位增益放大器，以输出从图像传感器读取黑化或覆盖像素时在OBP时间期间产生的像素电压差的平均值。

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