ABSTRACT
People have been trying to automate analog design for more than 30 years. The GM/ID captures the relation between the most important property of the transistor, the GM, the transconductance, and the most valuable resource, the power consumption. And the good news is that the search range for the GM/ID is very limited, typically from 5 to 25. The conventional way of doing device sizing is that the designer has control on the device geometry (W and L). ADT sizing assistant is integrated inside the schematic editor to enable the designer to find the sizing very quickly. The sizing can then be applied directly to the selected device in the schematic. The conventional way of doing it is manually tweaking the W and L of individual transistors, then running SPICE simulations looking for the circuit specs in a manual, time-consuming, and sub-optimal process. ADT is currently used by several integrated circuit design companies from startups to big corporates.
