The portable takeaway is the principle of common centroid geometry. By interdigitating or arranging devices symmetrically around a central point, any linear gradient in temperature, oxide thickness, or doping concentration across the wafer cancels out. Furthermore, Hastings emphasizes the importance of dummy structures at array edges to ensure identical etching and polishing environments. The mantra is simple: treat each matched pair as a single, distributed device, not two separate ones.
The Art of Analog Layout Alan Hastings is a foundational textbook providing a broad, practical understanding of successfully laying out analog integrated circuits. While originally published in physical formats like Soft Cover , modern "portable" or digital access is primarily through formats and digital platforms. Amazon.com Core Philosophy and Content Practical Emphasis the art of analog layout by alan hastings portable