Regarding your specific mention of "pdf 210," here is a breakdown of what that typically refers to in the context of this work: Page 210 and the "Interesting Piece"
The book is famous for its "Feature" sections and detailed circuit analysis: tietze schenk halbleiter schaltungstechnik pdf 210
While the exact content varies slightly between the 10th, 12th, and 15th German editions, page 210 consistently falls within the chapter on Lineare Verstärker mit Operationsverstärkern (Linear Amplifiers with Operational Amplifiers). This page traditionally marks the transition from ideal op-amp theory to the real-world limitations that dictate high-performance circuit design. Regarding your specific mention of "pdf 210," here
This edition is significantly expanded (over 1700 pages). Page 210 typically discusses frequency response or compensation techniques for multi-stage amplifiers. and 15th German editions