Recently, a new paper1 entitled “A 0.3‐V, 2.4‐nW, and 100‐Hz fourth‐order LPF for ECG signal Processing” (https://doi.org/10.1002/cta.2839) was published in Int. J. of Circuit Theory and Applications. In this paper, the authors describe a fourth‐order biopotential filter for ECG applications, which is based on a new (in their opinion) low‐voltage bulk‐driven voltage follower. The authors devoted an entire section to describe the proposed follower. I would like to inform the authors and other readers that this voltage follower is not new. It was first proposed and described in detail in Kulej and Blakiewicz.2 Next, it was used as a part of class AB output stage and validated experimentally in Kulej and Khateb.3

最近，Int发表了一篇名为“用于ECG信号处理的0.3V，2.4nW和100Hz四阶LPF”的新论文1（https://doi.org/10.1002/cta.2839）。电路理论与应用杂志。在本文中，作者描述了一种基于ECG应用的四阶生物电势滤波器，该滤波器基于一种新的（他们认为）低压批量驱动电压跟随器。作者在整个章节中专门介绍了建议的关注者。我想通知作者和其他读者，该电压跟随器不是新产品。它最初是在Kulej和Blakiewicz中提出并详细描述的。2接下来，它被用作AB类输出阶段的一部分，并在Kulej和Khateb中进行了实验验证。3