Introduction: This article discusses the possible interference of high-frequency electromagnetic waves in electronic signal processing circuits in practice. These situations are often omitted in ordinary classrooms and textbooks. The additional peripheral resistors and capacitors that seem irrelevant to ordinary signal processing play a crucial role in ensuring the stable operation of the circuit. Therefore, although encountering problems can be troublesome, observing, analyzing, and solving them will further expand one’s knowledge and improve problem-solving abilities.

Keywords: Bluetooth, EMIRR, OPAMP

Problem Statement

1.1 Source of the Problem

In a previous tweet, comments were made about the signal acquisition problems encountered by students during the production of smart cars (pulses in electromagnetic signals, black screen of camera signals), which aroused the interest of many students who shared their views in the