_best_ - The Art Of Analog Layout

Several layout techniques are used to optimize analog circuit performance:

The heart of analog design is the differential pair. For these circuits to work, two transistors must be as identical as possible. In the physical world, silicon isn't perfectly uniform. To combat this, layout artists use and Interdigitation techniques. By breaking transistors into smaller "fingers" and weaving them together in a cross-coupled pattern, you ensure that any gradient across the chip (like temperature or oxide thickness) affects both devices equally. 2. Parasitic Management the art of analog layout