If you cannot find the PDF and need a free, legal alternative to study the same topics, consider these resources (available as free PDFs legally):
If you own a legitimate copy of Circuiti Elettrici – Renzo Perfetti in PDF form: Circuiti Elettrici Renzo Perfetti.pdf
Chapter 6 (Regime sinusoidale) is the filter. 50% of students fail the exam here. If you do not understand that a derivative in time becomes multiplication by jω in phasor domain, you will not pass. Perfetti’s explanation of phasors is exceptionally rigorous. If you cannot find the PDF and need
"Circuiti Elettrici" by Renzo Perfetti, published by Zanichelli, is a comprehensive, widely used university manual focusing on a pedagogical approach to circuit analysis, combining theory with over 1,000 exercises and practical applications. The text is highly regarded for its clear, intuitive style, covering topics from fundamental circuit laws to advanced topics and simulation tools. For more details, visit Zanichelli Circuiti elettrici : Perfetti, Renzo: Amazon.it: Libri For more details, visit Zanichelli Circuiti elettrici :
The book is intended for undergraduate students in electrical engineering, electronics engineering, and related fields, such as computer science and physics. It is also suitable for professionals who need to refresh their knowledge of electric circuits.