会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 13. 发明申请
    • OUTPUT STAGE SYNCHRONIZATION
    • 输出级同步
    • WO2004102791A1
    • 2004-11-25
    • PCT/US2004/008548
    • 2004-03-19
    • D2AUDIO CORPORATIONKOST, Michael, A.ANDERSEN, Jack, B.
    • KOST, Michael, A.ANDERSEN, Jack, B.
    • H03F3/217
    • H04L7/02H04L7/005
    • Systems and methods for transferring data across clock domains in a manner that avoids metastability of the data and is very tolerant of variations in the clock signals of the different clock domains. One embodiment of the invention comprises a mechanism for passing data from a first clock to a second clock domain in a digital pulse width modulated (PWM) amplification system. In this embodiment, parallel data is generated in the process of converting PCM data to PWM data. The parallel data is processed in a clock domain having a first clock rate and is passed to a second clock domain having a clock rate that is twice the rate of the first clock domain. The parallel data is then serialized at the higher clock rate of the second clock domain.
    • 用于以避免数据的亚稳态的方式在时钟域上传输数据的系统和方法,并且非常容忍不同时钟域的时钟信号的变化。 本发明的一个实施例包括用于在数字脉宽调制(PWM)放大系统中将数据从第一时钟传递到第二时钟域的机构。 在本实施例中,在将PCM数据转换成PWM数据的过程中产生并行数据。 并行数据在具有第一时钟速率的时钟域中被处理,并且被传递到具有时钟速率是第二时钟域速率的两倍的第二时钟域。 然后并行数据以第二时钟域的较高时钟速率串行化。
    • 15. 发明申请
    • SYSTEMS AND METHODS FOR CONTROLLING TRANSIENT RESPONSE IN THE OUTPUT OF A NOISE SHAPER
    • 用于控制噪声形状输出中的瞬态响应的系统和方法
    • WO2007084894A2
    • 2007-07-26
    • PCT/US2007/060574
    • 2007-01-16
    • D2AUDIO CORPORATIONANDERSEN, Jack, B.
    • ANDERSEN, Jack, B.
    • H03M3/00
    • H03M7/3011H03M7/3026
    • Systems and methods implemented in a multi-bit digital noise shaper for reducing or eliminating undesirable transient response when the noise shaper exits a clipping state. In one embodiment, die noise shaper includes a quantizer, a filter, and a filter control unit that detects clipping in the quantizer and dynamically adjusts the allowable range of the internal state values of the filter. In one embodiment, a clipping mechanism is provided for each state value within the filter to clip the state value if it exceeds a corresponding clipping level. The clipping level for each state value is lower when the quantizer is clipping, and higher when the quantizer is not clipping. The clipping level for each state value may be transitioned either immediately or gradually from a current level to a target level (which is lower when the quantizer is clipping, and higher when die quantizer is not clipping).
    • 在多位数字噪声整形器中实现的用于在噪声整形器退出限幅状态时减少或消除不期望的瞬态响应的系统和方法。 在一个实施例中,管芯噪声整形器包括量化器,滤波器和滤波器控制单元,其检测量化器中的限幅并动态地调整滤波器的内部状态值的允许范围。 在一个实施例中,为滤波器内的每个状态值提供限幅机构,以在状态值超过相应的限幅电平时剪切状态值。 当量化器被削波时,每个状态值的限幅电平较低,当量化器未被削波时,限幅电平较高。 每个状态值的限幅电平可以从当前电平立即或逐渐转换到目标电平(当量化器被削波时较低,而当量子化器未被削波时,该电平更高)。
    • 16. 发明申请
    • SYSTEMS AND METHODS FOR PROVIDING MULTI CHANNEL PULSE WIDTH MODULATED AUDIO WITH STAGGERED OUTPUTS
    • 用于提供多通道脉冲宽度调制音频的系统和方法,具有同步输出
    • WO2004102792A1
    • 2004-11-25
    • PCT/US2004/014922
    • 2004-05-12
    • D2AUDIO CORPORATIONANDERSEN, Jack, B.TAYLOR, Wilson, E.
    • ANDERSEN, Jack, B.TAYLOR, Wilson, E.
    • H03F3/68
    • H03F3/68H03F3/2175H03F2200/331
    • Systems and methods for reducing the noise level in a multi-channel digital audio system by staggering the timing of the pulse-width modulation in the different channels and thereby reducing the magnitude and increasing the frequency characteristics of the generating switching noise. One embodiment comprises a multi-channel digital PWM amplifier in which the timing signals used by each channel’s modulator are staggered to evenly space the switching edges of the generated PWM signals. An additional, complementary delay is implemented in each of the channels to equalize the total delay for each channel so that the outputs of the channels are synchronized. The different channels may be implemented on different chips, in which case the chips may be synchronized prior to staggering the signals processed in each of the channels.
    • 通过交错在不同通道中的脉冲宽度调制的定时,从而降低产生开关噪声的幅度和增加频率特性,来降低多通道数字音频系统中的噪声电平的系统和方法。 一个实施例包括多通道数字PWM放大器,其中由每个通道的调制器使用的定时信号交错以均匀地间隔所产生的PWM信号的开关边缘。 在每个通道中实施额外的互补延迟以均衡每个通道的总延迟,使得通道的输出同步。 不同的信道可以在不同的芯片上实现,在这种情况下,芯片可以在交错在每个信道中处理的信号之前被同步。