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129 条记录 (耗时 0.017 秒)

    ASYMMETRICALLY-SWITCHED MODULATION SCHEME
    1.
    发明申请
    ASYMMETRICALLY-SWITCHED MODULATION SCHEME 有权
    非对称切换调制方案

    公开(公告)号：US20140294206A1

    公开(公告)日：2014-10-02

    申请号：US13966155

    申请日：2013-08-13

    申请人： Dan Shen ,  Frank Cheng ,  Lingli Zhang

    发明人： Dan Shen ,  Frank Cheng ,  Lingli Zhang

    IPC分类号： H03K7/00 ,  H03K7/06 ,  H03K7/08 ,  H03F3/181

    CPC分类号： H03K7/00 ,  H03F3/183 ,  H03F3/2173 ,  H03K7/06 ,  H03K7/08 ,  Y10T307/25

    摘要： An asymmetric modulation scheme may be used to drive two output nodes coupled to a load. The asymmetric modulation scheme may be one-sided such that the switching rate of a first output node is lower than the switching rate of a second output node. The first output node may be switched only to change a direction of current between the first output node and the second output node, while the second output node is switched to convey the information of an input signal. The asymmetric modulation scheme may be used to drive a speaker to reduce noise at the first output node to improve accuracy of current monitoring through the speaker by a current monitor coupled at the first output node.

    摘要翻译： 可以使用非对称调制方案来驱动耦合到负载的两个输出节点。 非对称调制方案可以是单向的，使得第一输出节点的切换速率低于第二输出节点的切换速率。 第一输出节点可以仅被切换以改变第一输出节点和第二输出节点之间的电流方向，而第二输出节点被切换以传送输入信号的信息。 可以使用非对称调制方案来驱动扬声器以减少第一输出节点处的噪声，以通过耦合在第一输出节点处的电流监视器来提高通过扬声器的电流监视的精度。

    Power System Architecture for Fluid Flow Measurement Systems
    2.
    发明申请
    Power System Architecture for Fluid Flow Measurement Systems 审中-公开
    用于流体流量测量系统的电力系统架构

    公开(公告)号：US20080088464A1

    公开(公告)日：2008-04-17

    申请号：US11537188

    申请日：2006-09-29

    申请人： Francisco M. Gutierrez

    发明人： Francisco M. Gutierrez

    IPC分类号： G08B21/00

    CPC分类号： G01F15/063 ,  F03G7/00 ,  G01F3/08 ,  G01F15/022 ,  H03K7/00

    摘要： An architecture to supply electrical operating power in fluid flow measurement applications, apparatus and associated systems, computer program products, and methods include a receiver tunable to various radio frequencies to capture radio frequency (RF) energy that may be used to supply regulated voltage to electronic fluid flow measurement data processing circuitry. In an example implementation, the power module searches for at least one RF signal that contains substantial energy. The received energy may be converted to a rectified waveform. The converted energy may be, for example, used to supply operating power to circuits in the fluid flow measurement circuitry, and/or it may be stored, such as in a capacitor or in a battery. Preferred embodiments may store signal strength information for one or more frequencies in at least one range of frequencies, and may tune the receiver to a frequency selected from the stored frequency information.

    摘要翻译： 在流体流量测量应用，装置和相关系统，计算机程序产品和方法中提供电动作功率的架构包括：可调谐到各种射频的接收器，以捕获射频（RF）能量，所述射频能量可被用于将调节的电压提供给电子 流体流量测量数据处理电路。 在示例实现中，功率模块搜索包含大量能量的至少一个RF信号。 接收的能量可以被转换成整流波形。 转换的能量可以例如用于向流体流量测量电路中的电路提供工作电力，和/或其可以存储，例如电容器或电池中。 优选实施例可以在至少一个频率范围内存储一个或多个频率的信号强度信息，并且可以将接收机调谐到从存储的频率信息中选择的频率。

    Method and system for modulating a carrier signal
    4.
    发明授权
    Method and system for modulating a carrier signal 失效
    用于调制载波信号的方法和系统

    公开(公告)号：US4613974A

    公开(公告)日：1986-09-23

    申请号：US590281

    申请日：1984-03-16

    申请人： Peter R. Vokac ,  Richard C. Gerdes

    发明人： Peter R. Vokac ,  Richard C. Gerdes

    IPC分类号： H03K7/00 ,  H04L27/00 ,  H03K9/00

    CPC分类号： H04L27/00 ,  H03K7/00

    摘要： A system and method for modulating a carrier signal wherein occurrence of the peaks in the modulated carrier signal conveys clocking information and each transition of a modulated carrier signal includes two midrange characteristics, the ratio of which represents data carried by that transition. Either analog or digital circuit techniques can be utilized to produce the modulated carrier signal, and either analog or digital techniques can be used to demodulate the modulated carrier signal in various embodiments of the invention. In an analog version of the modulator, a sinusoidal carrier signal is squared, alternate cycles of the squared waveform are phase shifted and clocked into analog multipliers, the gains of which are varied in response to an input data signal, the total gains being equal to a constant, and the multiplier outputs are summed to produce the modulated carrier signal. The ratios of the slopes of each transition represent the data. In an analog demodulator, the modulated signal is differentiated to obtain the slopes of the two portions of each transition and the peak values of the derivative signals are sampled, stored, and ratioed by means of an analog divider. 2.sup.N different levels of the modulated carrier signal can be used to represent the state of N digital bits.

    摘要翻译： 一种用于调制载波信号的系统和方法，其中调制的载波信号中的峰值的发生传送时钟信息，并且调制的载波信号的每个转换包括两个中频特性，其中的比例表示该转换所携带的数据。 可以使用模拟或数字电路技术来产生调制载波信号，并且可以使用模拟或数字技术来解调本发明的各种实施例中的调制载波信号。 在调制器的模拟版本中，正弦载波信号平方，平方波形的交替周期相移并计时成模拟乘法器，其增益响应于输入数据信号而变化，总增益等于 一个常数，乘法器输出相加以产生调制的载波信号。 每个转换的斜率的比率表示数据。 在模拟解调器中，调制信号被微分以获得每个转换的两个部分的斜率，并且通过模拟分频器对导数信号的峰值进行采样，存储和比例。 可以使用2N个不同级别的调制载波信号来表示N个数字比特的状态。

    Voltage-controlled transistor multivibrator
    6.
    发明授权
    Voltage-controlled transistor multivibrator 失效
    电压控制晶体管激励器

    公开(公告)号：US3587002A

    公开(公告)日：1971-06-22

    申请号：US3587002D

    申请日：1969-07-22

    申请人： RANSOMES SIMS & JEFFERIES LTD

    发明人： BROWN CHRISTOPHER ROBIN

    IPC分类号： H03K3/282 ,  H03K3/284 ,  H03K7/00 ,  H03K7/06

    CPC分类号： H03K3/2823 ,  H03K3/284 ,  H03K7/00

    摘要： A monostable or free-running transistor multivibrator is provided with semiconductor means for varying the period of conduction of one or both of the transistors forming the multivibrator in dependence upon a control voltage by varying the rate of discharge of the capacitor of the resistor-capacitor network whose time constant governs the period of conduction of the transistor. In one form of the invention the semiconductor means comprises an NPN transistor the collector-emitter path of which is in series with the capacitor of the associated resistor capacitor network, the control voltage being applied, directly or indirectly, to the base of the NPN transistor.