阅读说明：本技术 用于宽带相位梯度信号采集的方法和装置 (Method and apparatus for wideband phase gradient signal acquisition ) 是由 S·古普塔 D·克劳福德 T·伯顿 S·拉姆昌达尼 K·卡纳万 于 2016-08-26 设计创作，主要内容包括：本公开有助于捕获诸如微伏或亚微伏分辨率的生物电势信号的生物信号,该分辨率处于或显著低于常规心电图和生物信号采集仪器的本底噪声。在一些实施例中,本文所公开的示例性系统有助于采集和记录同时采样的宽带相位梯度信号(例如,宽带心脏相位梯度信号,宽带脑部相位梯度信号),在一些实施例中,具有小于约1μs的时间偏差,并且在其他实施例中,具有不大于约10飞秒的时间偏差。值得注意的是,所例示的系统使所采集的宽带相位梯度信号中的非线性失真(例如,会通过某些滤波器引入的失真)最小化,从而不影响其中的信息。(The present disclosure facilitates capture of bio-signals such as biopotential signals at microvolt or sub-microvolt resolution that is at or significantly below the noise floor of conventional electrocardiogram and bio-signal acquisition instruments. In some embodiments, the exemplary systems disclosed herein facilitate the acquisition and recording of simultaneously sampled wideband phase gradient signals (e.g., wideband cardiac phase gradient signals, wideband brain phase gradient signals), in some embodiments with a time offset of less than about 1 μ s, and in other embodiments with a time offset of no greater than about 10 femtoseconds. Notably, the illustrated system minimizes non-linear distortion (e.g., distortion that may be introduced by certain filters) in the acquired wideband phase gradient signal so as not to affect the information therein.)