ILAC: an automated layout tool for analog CMOS circuits

ILAC (interactive layout of analog CMOS circuits) is a process-independent tool that automatically generates geometrical layout for analog CMOS cells from a circuit description. ILAC handles typical analog layout constraints such as device matching, symmetry, and distance and coupling constraints. ILAC supports user-specified constraints on cell height and input/output pin locations. Together with the design tool IDAC (interactive design for analog circuits), ILAC makes a fully functional analog CMOS cell compiler that automatically produces geometrical layout from functional specifications for a library of circuits including amplifiers, voltage and current references, comparators, oscillators, and A/D (analog-to-digital) converters