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    • 11. 发明授权
    • Low power, wavelet-based spike detector
    • 低功率,基于小波的尖峰检测器
    • US07965779B2
    • 2011-06-21
    • US11909060
    • 2006-03-17
    • Christy L. SheJohn G. HarrisJose C. Principe
    • Christy L. SheJohn G. HarrisJose C. Principe
    • H04B14/04
    • A61B5/04001A61B5/7225A61B5/726G06K9/00523
    • A multi-scale spike detector for performing multi-resolution spike detections of a signal is provided. The spike detector includes a gamma filter having cascaded low-pass filters. The cascaded filters collectively provide different cutoff frequencies, each of the filters having a respective output. One of the filters has an input, at which the signal is received. The spike detector further includes combining circuitry that combines at least some of the respective outputs of the cascaded filters. The differences formed from this combining provide a waveform representation of the input signal. The waveform representation consists essentially of spikes that occur in the signal.
    • 提供了用于执行信号的多分辨率尖峰检测的多尺度尖峰检测器。 尖峰检测器包括具有级联低通滤波器的伽马滤波器。 级联滤波器共同提供不同的截止频率,每个滤波器具有相应的输出。 滤波器中的一个具有接收信号的输入端。 尖峰检测器还包括组合电路,其组合级联滤波器的相应输出的至少一些。 由该组合形成的差异提供了输入信号的波形表示。 波形表示基本上由信号中出现的尖峰组成。
    • 19. 发明授权
    • CMOS imager having asynchronous pixel readout in order of pixel illumination
    • CMOS成像器具有像素照明顺序的异步像素读出
    • US06660989B2
    • 2003-12-09
    • US10190785
    • 2002-07-08
    • Xiaochuan GuoZhiliang Julian ChenJohn G. Harris
    • Xiaochuan GuoZhiliang Julian ChenJohn G. Harris
    • H04N5335
    • H04N5/341
    • This CMOS imager represents illuminance in the time domain. Once per frame, each pixel outputs a pulse after a time proportional to the illuminance on that pixel. Therefore, the illuminance on that pixel is related to the time difference between its pulse event and global reset of the imager. A counter reports the times of these pulse events in a digital format. Thus no analog to digital converter is necessary. This imager enables easy computation of pixel intensity histograms. Frame data is stored in pixel intensity order using row and column arbiters to produce a pixel address. Because each pixel has its own exposure time, the imager has a wide dynamic range of 120 dB. This imager has low power dissipation and avoids the noise and mismatch problems of prior complicated analog readout circuits.
    • 该CMOS成像器表示时域中的照度。 每帧一次,每个像素在与该像素上的照度成比例的时间之后输出脉冲。 因此,该像素的照度与其脉冲事件与成像器的全局复位之间的时间差有关。 计数器以数字格式报告这些脉冲事件的时间。 因此,不需要模数转换器。 该成像器能够容易地计算像素强度直方图。 帧数据使用行和列仲裁器以像素强度顺序存储以产生像素地址。 因为每个像素都有自己的曝光时间,所以成像器具有120 dB的宽动态范围。 该成像器具有低功耗,并避免了以前复杂的模拟读出电路的噪声和失配问题。