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    • 21. 发明申请
    • EXCESS LOOP DELAY COMPENSATION (ELC) FOR AN ANALOG TO DIGITAL CONVERTER (ADC)
    • 用于数字转换器(ADC)的模拟的超级环路延迟补偿(ELC)
    • WO2016036654A1
    • 2016-03-10
    • PCT/US2015/047709
    • 2015-08-31
    • QUALCOMM INCORPORATED
    • DAGHER, Elias HaniYAMAMOTO, KentaroALLADI, Dinesh Jagannath
    • H03M3/00
    • H03M1/34H03M3/30H03M3/37H03M3/426H03M3/454H03M3/458H03M3/464
    • In one embodiment, a circuit includes a quantizer configured to convert an analog input signal to a digital signal. The quantizer includes a first feedback path including a first digital to analog converter (DAC) coupled from an output of the quantizer to a summing junction that is coupled to an input of the quantizer. The first feedback path converts the digital signal to a first corresponding analog value for combining with the analog input signal at the summing junction. Also, the quantizer includes a plurality of excess loop delay (ELD) compensation paths coupled to the summing junction configured to compensate for excess loop delay from a second feedback path coupled from the output of the quantizer to input of the quantizer via a loop filter. Second DACs in the second feedback path convert the digital signal to a second corresponding analog value for combining with the analog input signal.
    • 在一个实施例中,电路包括被配置为将模拟输入信号转换成数字信号的量化器。 量化器包括第一反馈路径,其包括从量化器的输出耦合到耦合到量化器的输入的求和结点的第一数模转换器(DAC)。 第一反馈路径将数字信号转换为第一对应的模拟值,以与求和点处的模拟输入信号组合。 此外,量化器还包括耦合到求和点的多个过剩环路延迟(ELD)补偿路径,其被配置为补偿从量化器的输出耦合到从量化器经由环路滤波器输入的第二反馈路径的过多的环路延迟。 第二反馈路径中的第二DAC将数字信号转换为第二对应的模拟值,以与模拟输入信号组合。
    • 22. 发明申请
    • FEEDBACK DELAY REDUCTION IN FORCE FEEDBACK DEVICES
    • 反馈延迟减少在力反馈设备
    • WO2015189150A2
    • 2015-12-17
    • PCT/EP2015/062711
    • 2015-06-08
    • ROBERT BOSCH GMBH
    • BALACHANDRAN, GaneshPETKOV, Vladimir
    • H03M3/00
    • H04R3/00H03M3/37H03M3/406H03M3/422H03M3/452H03M3/454H04R2201/003
    • A feedback circuit provides a feedback signal to a transducer. The feedback circuit includes an ADC that generates digital representations of a feedback signal, digital controller that identifies adjustments for the feedback, and DAC that generates an analog output of the adjusted feedback signal. The digital controller performs speculative computation to identify adjustments for the feedback signal output for each output value from the ADC prior to receiving the output from the ADC. The ADC and DAC include sigma-delta modulators that operate with a zero clock cycle delay in a forward path. The ADC, digital controller, and DAC generate adjustments to the feedback output signal with reduced delay that reduce phase lag and improve phase margin to maintain stability in the transducer.
    • 反馈电路向换能器提供反馈信号。 反馈电路包括产生反馈信号的数字表示的ADC,识别反馈的调节的数字控制器以及产生经调整的反馈信号的模拟输出的DAC。 在接收ADC的输出之前,数字控制器执行推测计算以识别来自ADC的每个输出值的反馈信号输出的调整。 ADC和DAC包括在正向通路中以零时钟周期延迟运行的Σ-Δ调制器。 ADC,数字控制器和DAC通过减小延迟来产生对反馈输出信号的调整,从而减少相位滞后并提高相位裕度,以保持传感器的稳定性。
    • 23. 发明申请
    • IMPLANTABLE MEDICAL DEVICE WITH LOW POWER DELTA-SIGMA ANALOG-TO-DIGITAL CONVERTER
    • 具有低功耗DELTA-SIGMA模拟到数字转换器的可植入医疗设备
    • WO2009042011A1
    • 2009-04-02
    • PCT/US2008/009034
    • 2008-07-25
    • MEDTRONIC, INC.TERRY, Michael, B.HEINKS, Michael, W.ANDERSON, Joel, A.FRIGAARD, Mark, A.
    • TERRY, Michael, B.HEINKS, Michael, W.ANDERSON, Joel, A.FRIGAARD, Mark, A.
    • A61N1/37H03M3/02H03M3/04
    • A61N1/3704H03M3/34H03M3/37H03M3/434
    • In general, this disclosure describes techniques for reducing power consumption within an implantable medical device (IMD). An IMD implanted within a patient may have finite power resources that are intended to last several years. To promote device longevity, sensing and therapy circuits of the IMD are designed to incorporate an analog-to-digital converter (ADC) that provides relatively high resolution output at a relatively low operation frequency, and does so with relatively low power consumption. An ADC designed in accordance with the techniques described herein utilizes a quantizer that has a lower resolution than a digital-to-analog converter (DAC) used for negative feedback. Such a configuration provides the benefits of higher resolution DAC feedback without having the use high oversampling ratios that result in high power consumption. Also, the techniques avoid the use of, and the associated high power consumption of, a high resolution flash ADC, within the sigma delta loop.
    • 通常,本公开描述了用于降低可植入医疗装置(IMD)内的功率消耗的技术。 植入患者体内的IMD可能具有有限的功率资源,这些功率资源将持续数年。 为了促进设备使用寿命,IMD的感测和治疗电路被设计为包含在相对低的操作频率下提供相对高分辨率输出的模数转换器(ADC),并且以相对较低的功耗来实现。 根据本文描述的技术设计的ADC利用具有比用于负反馈的数模转换器(DAC)更低的分辨率的量化器。 这种配置提供了更高分辨率DAC反馈的优点,而不需要使用导致高功耗的高过采样比。 此外,该技术避免了在Σ-Δ环路内使用高分辨率闪存ADC的相关高耗能。