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 CMOS 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 converters.