1.  The article was first posted on Jun. 20, 2026.

2.  Revised on Jun. 24, 2026

     Added the transformer core specification of the pulse current detection transformer to Chapter 4. 

3.  Revised on Jul. 04, 2026

     Added the component layout figure to the attachments and inserted a link to it in Chapter 2.

     Figure 4 has been replaced with the latest version.

4.  Revised on Jul. 08, 2026

     Added the full circuit diagram as an attachment and included a link in the text of Chapter 2.

5.  Revised on Jul. 10, 2026

     Added the Fig. 10 in Chapter 4 and Added a description of how the detection waveform varies depending on the gain of the block detector.