FILTER
    1.
    发明专利
    FILTER 失效

    公开(公告)号:JPH10233649A

    公开(公告)日:1998-09-02

    申请号:JP4618198

    申请日:1998-02-12

    Applicant: MOTOROLA INC

    Abstract: PROBLEM TO BE SOLVED: To provide the transconductance filter in which a stable operation is continued while a die area is reduced and power consumption is decreased. SOLUTION: The transconductance filter 200 is made up of multi-stage conductors 110, 120, 130 each having inputs and an output and switches 260, 265, 270 coupled between each output and a voltage source. Each switch responds to a control signal 275 in terms of the operation to directly connect the voltage source and the output of each transconductor or disconnect them before a point of time when at least the filter filters an input voltage signal. The voltage of the voltage source is within a prescribed input voltage range of the transconductor that is specified by a range of the transconductance of the transconductor being nearly constant and positive.

    Filter
    2.
    发明专利
    Filter 未知

    公开(公告)号:GB2322246B

    公开(公告)日:2001-09-12

    申请号:GB9801266

    申请日:1998-01-21

    Applicant: MOTOROLA INC

    Abstract: A transconductance filter (200) comprises multiple stages of a transconductor (110,120,130) having an input and an output, and a switch (260,265,270) coupled between the output and the voltage source. The switch is operatively responsive to the control signal for coupling and decoupling the voltage source directly to the output of the transconductor at least prior to the time the filter is required to filter the input voltage signal. The voltage source is within a predetermined input voltage range of the transconductor defined by a region in which a transconductance of the transconductor is substantially constant and positive.

    Transconductance-capacitor filter

    公开(公告)号:GB2322246A

    公开(公告)日:1998-08-19

    申请号:GB9801266

    申请日:1998-01-21

    Applicant: MOTOROLA INC

    Abstract: A transconductance-capacitor filter comprises multiple stages of a transconductor 210,220,230 having an input and an output, and a switch 260,265,270 coupled between the output and a voltage source VAG. The switch is operatively responsive to a control signal 275 for coupling and decoupling the voltage source directly to the output of the transconductor at least prior to the time the filter is required to filter an input voltage signal 205. The voltage source is within a predetermined input voltage range of the transconductor defined by a region in which a transconductance of the transconductor is substantially constant and positive.

    REAL TIME ACTIVE ADDRESSING DISPLAY DEVICE AND METHOD UTILIZING FAST WALSH TRANSFORM CIRCUIT

    公开(公告)号:CA2164982A1

    公开(公告)日:1995-01-12

    申请号:CA2164982

    申请日:1994-06-13

    Abstract: The device and method provide active-addressing drive signals foran LCD by utilizing an efficient implementation of Walsh functions. By implementation of a technique for determining fast Walsh transformations, real time active-addressing of the drive signals are provided by determining random access memory (RAM) addresses for sending preselected portions of the digital image data (PPDIDs) to a plurality of RAMs (106, 108, 110), and controlling simultaneous parallel input/output of data to/from the RAMs and a fast Walsh transform circuit (FWTC 102) such that fast Walsh transform (FWTs) are performed on input digital image data. For example, active-addressing drive signals for one-half of a 240 by 640 column sized LCD may be determined in real time. Thus, two of the devices of the present invention may be utilized to provide a system for real time active-addressing for a typical visual graphics array (VGA) LCD.

    METHOD AND APPARATUS FOR OPTIMIZING RADIO PERFORMANCE THROUGH INFERRED KNOWLEDGE OF INDOOR-OUTDOOR RADIO STATUS
    9.
    发明申请
    METHOD AND APPARATUS FOR OPTIMIZING RADIO PERFORMANCE THROUGH INFERRED KNOWLEDGE OF INDOOR-OUTDOOR RADIO STATUS 审中-公开
    通过推荐的户外无线电状态知识来优化无线电性能的方法和装置

    公开(公告)号:WO2008091420A2

    公开(公告)日:2008-07-31

    申请号:PCT/US2007081709

    申请日:2007-10-18

    CPC classification number: H04B1/005

    Abstract: Performance of a radio device is optimized by estimating if the device is inside a building. One or more sensors on the radio device are use to measure an environmental quantities relating to the environment of the radio device. The likelihood of the radio device being inside a building is inferred from these measurements. The operation of the radio device then is controlled accordingly. For example, if the radio device is determined to be inside a building, a low operating frequency may be selected for the radio device if a wide area network connection is required, while a high operating frequency may be selected if a local connection is required. An environmental quantity may be, for example, a satellite signal, ambient light, temperature, RF energy, or the response to a test signal emitted by the radio device.

    Abstract translation: 通过估计设备是否在建筑物内部来优化无线电设备的性能。 无线电设备上的一个或多个传感器用于测量与无线电设备的环境有关的环境数量。 从这些测量推断出无线电设备在建筑物内的可能性。 然后相应地控制无线电设备的操作。 例如,如果无线电设备被确定在建筑物内部,则如果需要广域网络连接,则可以为无线电设备选择低操作频率,而如果需要本地连接,则可以选择高操作频率。 环境量可以是例如卫星信号,环境光,温度,RF能量或对由无线电设备发射的测试信号的响应。

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