公开(公告)号：US20130187946A1

公开(公告)日：2013-07-25

申请号：US13354627

申请日：2012-01-20

申请人： Michael Pan ,  Zehao Chang ,  John Pan

发明人： Michael Pan ,  Zehao Chang ,  John Pan

IPC分类号： G09G5/00

CPC分类号： G09G5/36 ,  G06F19/00 ,  G06F19/321 ,  G09G2340/04 ,  G09G2340/0407 ,  G09G2370/022 ,  G09G2380/08

摘要： A system and method for image data management. A tiled representation of a data set is accessed. The tiled representation includes a plurality of high-resolution tiles and a plurality of reduced-resolution tiles. A request to access said data set from a computing device is received. An image display window is determined based on said request from the computing device, where the image display window corresponds to a displayable image for display on the display device. At least one overlapping image to send the computing device is determined based on said image display window, where the at least one overlapping image is selected from the scaled full images, the plurality of high-resolution tiles, and the plurality of reduced resolution tiles. At least a portion of the at least one overlapping image is sent to the computing device.

摘要翻译： 一种用于图像数据管理的系统和方法。 访问数据集的平铺表示。 平铺表示包括多个高分辨率瓦片和多个降低分辨率的瓦片。 接收从计算设备访问所述数据集的请求。 基于来自计算设备的所述请求确定图像显示窗口，其中图像显示窗口对应于可显示图像以在显示设备上显示。 基于所述图像显示窗口确定发送计算设备的至少一个重叠图像，其中从缩放的完整图像，多个高分辨率瓦片和多个降低分辨率瓦片中选择至少一个重叠图像。 至少一个重叠图像的至少一部分被发送到计算设备。

公开(公告)号：US07583947B2

公开(公告)日：2009-09-01

申请号：US10977869

申请日：2004-10-29

申请人： Meng-An (Michael) Pan

发明人： Meng-An (Michael) Pan

IPC分类号： H04B1/10

CPC分类号： H04B1/302

摘要： Certain embodiments of the invention may be found in a method and system for single sideband mixing receiver architecture for improving signal quality in an RF communication system. An embodiment of the invention may mix a first input signal with a first local oscillator signal, via a first mixer, to generate a first mixed output signal. It may also mix a second input signal with a second local oscillator signal, via a second mixer, to generate a second mixed output signal. It may then generate a single sideband signal by adding the first mixed output signal and the second mixed output signal. The removal of one of two sidebands may reduce noise at the desired signal, since the removed sideband may have been at the same frequency as the desired signal.

摘要翻译： 可以在用于改善RF通信系统中的信号质量的单边带混合接收机架构的方法和系统中找到本发明的某些实施例。 本发明的实施例可以经由第一混频器将第一输入信号与第一本地振荡器信号混合，以产生第一混合输出信号。 它还可以通过第二混频器将第二输入信号与第二本地振荡器信号混合，以产生第二混合输出信号。 然后，可以通过将第一混合输出信号和第二混合输出信号相加来产生单个边带信号。 由于去除的边带可能处于与期望信号相同的频率，所以去除两个边带中的一个可能会降低所需信号处的噪声。

公开(公告)号：US20080036532A1

公开(公告)日：2008-02-14

申请号：US11503035

申请日：2006-08-11

申请人： Meng-An (Michael) Pan

发明人： Meng-An (Michael) Pan

IPC分类号： H03F1/14

CPC分类号： H03F3/24 ,  H03F1/02 ,  H03F1/0205 ,  H03F1/0227 ,  H03F1/025 ,  H03F1/0266 ,  H03F1/0277 ,  H03F3/45188 ,  H03F3/72 ,  H03F2200/321 ,  H03F2200/336 ,  H03F2200/451 ,  H03F2200/504 ,  H03F2200/507 ,  H03F2200/534 ,  H03F2203/45056 ,  H03F2203/45292 ,  H03F2203/45364 ,  H04B2001/0416 ,  H04B2001/045

摘要： A method to reduce transmitted output power and the battery consumption is provided. This involves first determining the required output level. The amplitude of the input signal provided to a PA driver may be based on the required output power level. This amplitude may be set by a PGA. A number of cascode bias signals are also provided to the PA driver. These cascode bias signals are based on the required output power level as well. Reducing the cascode bias signals by enabling/disabling circuits within the PA driver allows power consumption of the wireless device to be reduced.

公开(公告)号：US20060093069A1

公开(公告)日：2006-05-04

申请号：US10977210

申请日：2004-10-29

申请人： Meng-An (Michael) Pan

发明人： Meng-An (Michael) Pan

IPC分类号： H03D3/00

CPC分类号： H03D7/165 ,  H03D3/007 ,  H03D7/1433 ,  H03D7/1441 ,  H03D7/1458 ,  H03D2200/0033 ,  H03D2200/0047 ,  H03D2200/0084

摘要： A method for improving signal quality in a receiver is provided. The method may comprise generating a plurality of output signals from a single I component Gm stage and a single Q component Gm stage. The generated plurality of output signals may be mirrored from said I component Gm stage to a first I component mixer circuit and a second I component mixer circuit, and from the Q component Gm stage to a first Q component mixer circuit and a second Q component mixer circuit. An output DC signal may be generated from an output of the first I component mixer circuit and the first Q component mixer circuit. An output may be generated that may comprise a difference signal from the second I component mixer circuit and the second Q component mixer circuit.

摘要翻译： 提供了一种用于提高接收机中的信号质量的方法。 该方法可以包括从单个I分量Gm级和单个Q分量Gm级产生多个输出信号。 所生成的多个输出信号可以从所述I分量Gm级到第一I分量混合电路和第二I分量混频器电路，并且从Q分量Gm级到第一Q分量混频器电路和第二Q分量混频器 电路。 可以从第一I分量混频器电路和第一Q分量混频器电路的输出产生输出DC信号。 可以产生可以包括来自第二I分量混频器电路和第二Q分量混频器电路的差分信号的输出。

公开(公告)号：US07039384B2

公开(公告)日：2006-05-02

申请号：US10459856

申请日：2003-06-12

申请人： Meng-An (Michael) Pan

发明人： Meng-An (Michael) Pan

IPC分类号： H04B1/28

CPC分类号： G05F3/30

摘要： A low power supply band-gap current reference includes a 1st P-N junction device, a 2nd and P-N junction device, a 1st current source, a 2nd current source, a 1st resistor, a 2nd resistor, a 3rd resistor, an operational amplifier, and a current mirror. The 1st and 2nd P-N junction devices are operably coupled to the 1st and 2nd current sources, respectively. The 2nd P-N junction device is a larger device than the 1st P-N junction device. The 2nd resistor is operably coupled in parallel with the 1st P-N junction device and the 2nd resistor is coupled in series with the 2nd P-N junction device. The 3rd resistor is coupled in parallel with the series combination of the 2nd resistor and 2nd P-N junction device. The operational amplifier is coupled to control the 1st and 2nd current sources based on the voltage imposed across the 1st and 2nd resistors. The current mirror is operably coupled to mirror the current of the 1st and/or 2nd current source to provide a band-gap reference current.

摘要翻译： 低功率电源带隙电流基准包括1 PN结器件，第二和/或PN结器件，第一<！ - SIPO 电流源，1 电阻，2 电阻，3 电阻 ，运算放大器和电流镜。 第一和第二和第二PN结装置可操作地耦合到第一和第二和第二电流源， 分别。 第二个P-N结装置是比第一个P-N结装置更大的装置。 第二和第二电阻器与第一PN结器件并联可操作地耦合，并且第二和/或第二电阻器与2 < SUP> nd PN结器件。 第三阻抗电阻器与第二和第二电阻器和第二个P-N结器件的串联组合并联耦合。 运算放大器被耦合以基于施加在第一和第二电极上的电压来控制第一和第二和第二电流源， nd 电阻。 电流镜可操作地耦合以镜像第一和/或第二电极源的电流以提供带隙参考电流。

公开(公告)号：US20060114063A1

公开(公告)日：2006-06-01

申请号：US11000622

申请日：2004-11-30

申请人： Michael Pan

发明人： Michael Pan

IPC分类号： H03F3/04

CPC分类号： H03F3/189 ,  H03F1/30

摘要： In an RF communication system, aspects of constant or proportional to absolute temperature biasing for minimizing transmitter output power variation may comprise configuring at least one current source to provide a temperature dependent current, where the current may be constant with temperature or vary proportionally to absolute temperature. A control voltage that may be generated by an operational amplifier may be fed back to control the current source. An input reference voltage may also be generated for the operational amplifier by utilizing PN junction characteristics of at least one bipolar junction transistor. Resistance may be adjusted to allow operation of the current source at a plurality of different supply voltages, including the different supply voltages that may be less than 1.2 volts, for example. Additionally, adjusting the resistance may also allow the current to be constant with temperature or vary with temperature.

公开(公告)号：US5491428A

公开(公告)日：1996-02-13

申请号：US170052

申请日：1993-12-20

申请人： Michael Pan

发明人： Michael Pan

IPC分类号： H03K3/356 ,  H03K19/017

CPC分类号： H03K3/356165 ,  H03K19/01735

摘要： A bus line is divided into at least first and second bus segments that are coupled together via a precharge buffer, each segment seeing less effective RC than if segmentation were not present. The precharge buffer provides first and second output buffer lines (or segments) that are monitored and cross-coupled through the buffer such that each line is pulled-up or pulled-down substantially simultaneously to keep equivalent states in each. Feedback provided by the cross-coupling further hastens the process of bus pull down. Still further acceleration of the pulldown process can result by sensing bus pulldown at trip point that is higher than a conventional logic level trip point. Segmenting the bus and coupling the segments with a precharge buffer results in less equivalent RC being presented to each bus segment. Thus, effective shunt capacitance is reduced, allowing use of downsized transistors coupled to the output buffer lines to pull down the bus segments. This saves integrated circuit chip area, reduces pulldown surge current and ground bounce. Further, the decreased load capacitance achieved by using smaller pulldown load devices reduces capacitive bus loading, and thus contributes to a more rapid change of bus state. Alternatively, for a given pulldown current, the present invention permits a segmented bus to be pulled down more rapidly than a conventional non-segmented bus configuration.

摘要翻译： 总线被分成至少第一和第二总线段，其经由预充电缓冲器耦合在一起，每个段看起来比不存在分段时效果更差。 预充电缓冲器提供通过缓冲器监测和交叉耦合的第一和第二输出缓冲线（或段），使得每条线基本上同时上拉或下拉以保持每个线路中的等效状态。 交叉耦合提供的反馈进一步加速了总线下拉的过程。 通过在比常规逻辑电平跳变点高的跳变点处检测总线下拉可能导致下拉过程的进一步加速。 将总线分段并将段与预充电缓冲器耦合导致较少的等效RC呈现给每个总线段。 因此，减小了有效的并联电容，允许使用耦合到输出缓冲线的小型晶体管来下拉总线段。 这样可以节省集成电路芯片面积，减少下拉浪涌电流和地面反弹。 此外，通过使用较小的下拉负载装置实现的减小的负载电容降低了容性总线负载，并且因此有助于总线状态的更快速的改变。 或者，对于给定的下拉电流，本发明允许分段总线比常规非分段总线配置更快地被下拉。

公开(公告)号：US07459969B2

公开(公告)日：2008-12-02

申请号：US11503035

申请日：2006-08-11

申请人： Meng-An (Michael) Pan

发明人： Meng-An (Michael) Pan

IPC分类号： H03F1/14

CPC分类号： H03F3/24 ,  H03F1/02 ,  H03F1/0205 ,  H03F1/0227 ,  H03F1/025 ,  H03F1/0266 ,  H03F1/0277 ,  H03F3/45188 ,  H03F3/72 ,  H03F2200/321 ,  H03F2200/336 ,  H03F2200/451 ,  H03F2200/504 ,  H03F2200/507 ,  H03F2200/534 ,  H03F2203/45056 ,  H03F2203/45292 ,  H03F2203/45364 ,  H04B2001/0416 ,  H04B2001/045

摘要： A method to reduce transmitted output power and the battery consumption is provided. This involves first determining the required output level. The amplitude of the input signal provided to a PA driver may be based on the required output power level. This amplitude may be set by a PGA. A number of cascode bias signals are also provided to the PA driver. These cascode bias signals are based on the required output power level as well. Reducing the cascode bias signals by enabling/disabling circuits within the PA driver allows power consumption of the wireless device to be reduced.

摘要翻译： 提供了减少传输输出功率和电池消耗的方法。 这包括首先确定所需的输出电平。 提供给PA驱动器的输入信号的幅度可以基于所需的输出功率电平。 该幅度可以由PGA设定。 还向PA驱动器提供了多个共源共栅偏置信号。 这些共源共栅偏置信号也基于所需的输出功率电平。 通过启用/禁用PA驱动器中的电路来降低共源共栅偏置信号，可以降低无线设备的功耗。

公开(公告)号：US20080039031A1

公开(公告)日：2008-02-14

申请号：US11503422

申请日：2006-08-11

申请人： Meng-An (Michael) Pan

发明人： Meng-An (Michael) Pan

IPC分类号： H04B1/04

CPC分类号： H04B1/0475

摘要： The present invention provides a transmitter architecture operable to cancel non-data-related direct current (DC) components therein. One method to cancel transmitter non-data-related DC offsets includes generating a baseband digital null signal. Then the digital null signal is converted to a pair of differential analog voltage null signals. The pair of differential analog voltage null signals may be converted to a pair of differential analog current null signals. The pair of differential analog current null signals is provided to a pair of matched impedances to generate a pair of voltage signals across the pair of matched impedances. A voltage offset results from comparing the pair of voltages generated across the pair of matched impedances. Then a current offset is determined based on the voltage offset.

摘要翻译： 本发明提供了一种可消除非数据相关直流（DC）分量的发射机结构。 消除发射机非数据相关DC偏移的一种方法包括产生基带数字无效信号。 然后数字零位信号被转换成一对差分模拟电压无效信号。 该差分模拟电压空信号可以转换成一对差分模拟电流无效信号。 一对差分模拟电流零点信号被提供给一对匹配的阻抗以在一对匹配的阻抗上产生一对电压信号。 通过比较在该对匹配阻抗上产生的一对电压，产生电压偏移。 然后根据电压偏移确定电流偏移。

公开(公告)号：US08773463B2

公开(公告)日：2014-07-08

申请号：US13354627

申请日：2012-01-20

申请人： Michael Pan ,  Zehao Chang ,  John Pan

发明人： Michael Pan ,  Zehao Chang ,  John Pan

IPC分类号： G09G5/00

CPC分类号： G09G5/36 ,  G06F19/00 ,  G06F19/321 ,  G09G2340/04 ,  G09G2340/0407 ,  G09G2370/022 ,  G09G2380/08

摘要： A system and method for image data management. A tiled representation of a data set is accessed. The tiled representation includes a plurality of high-resolution tiles and a plurality of reduced-resolution tiles. A request to access said data set from a computing device is received. An image display window is determined based on said request from the computing device, where the image display window corresponds to a displayable image for display on the display device. At least one overlapping image to send the computing device is determined based on said image display window, where the at least one overlapping image is selected from the scaled full images, the plurality of high-resolution tiles, and the plurality of reduced resolution tiles. At least a portion of the at least one overlapping image is sent to the computing device.

摘要翻译： 一种用于图像数据管理的系统和方法。 访问数据集的平铺表示。 平铺表示包括多个高分辨率瓦片和多个降低分辨率的瓦片。 接收从计算设备访问所述数据集的请求。 基于来自计算设备的所述请求确定图像显示窗口，其中图像显示窗口对应于可显示图像以在显示设备上显示。 基于所述图像显示窗口确定发送计算设备的至少一个重叠图像，其中从缩放的完整图像，多个高分辨率瓦片和多个降低分辨率瓦片中选择至少一个重叠图像。 至少一个重叠图像的至少一部分被发送到计算设备。