💡💡💡 Let’s talk about 𝐀𝐜𝐭𝐢𝐯𝐞 𝐍𝐨𝐢𝐬𝐞 𝐂𝐚𝐧𝐜𝐞𝐥𝐢𝐧𝐠 (𝐀𝐍𝐂) 𝐢𝐧 𝐭𝐡𝐞 𝐜𝐨𝐧𝐭𝐞𝐱𝐭 𝐨𝐟 𝐞𝐥𝐞𝐜𝐭𝐫𝐨𝐦𝐚𝐠𝐧𝐞𝐭𝐢𝐜 𝐜𝐨𝐦𝐩𝐚𝐭𝐢𝐛𝐢𝐥𝐢𝐭𝐲 (𝐄𝐌𝐂)

In the simplest terms, ANC is the technique of reducing unwanted noise by adding a second sound specifically designed to cancel the first. In the realm of EMC, this translates to creating an „anti-noise“ signal to counteract electromagnetic interference.

The tools at our disposal are many, and today, I’d like to shed light on the Texas Instruments‘ 𝗧𝗣𝗦𝗙𝟭𝟮𝗖𝟭 and 𝗧𝗣𝗦𝗙𝟭𝟮𝗖𝟯 devices.

These devices are fascinating; they’re designed to sense all current-leading lines and inject a phase-shifted signal into them. This counter-signal effectively cancels out the unwanted noise. Hence active noise cancelling.

Active EMI filter by TI
Active EMI filter by TI
Active EMI filter