About the book: 2022 / When designing radio engineering devices, the authors of the article were faced with the fact that they could not find a method for calculating a high-frequency filter for circuits with differential entry/exit. There are methods and calculation programs for conventional filters, but there is nothing for differential filters. We had to develop such a technique ourselves, and then use it to calculate the necessary differential filters. The article is devoted to the features of calculating a high-pass filter for circuits with differential input/output. The methods presented in the article may be useful for developers of radio devices. Published: International conference “Radio-electronic devices and systems for infocommunication technologies”, Reports, REUS, Moscow 2015, p. 389 – 391. Article is devoted features of calculation of the high-frequency filter for schemes with a differential input/exit.