Low Power Compensation Technique for Process Variations in Sub Micro CMOS Amplifiers

Process variation is an obstacle in designing reliable CMOS mixed signal systems with high yield. To minimize the variation in voltage gain due to variations in process, supply voltage, and temperature for common trans conductance-based amplifiers, we present a new compensation method based on statistical feedback of process information. We further apply our scheme to two well known amplifier topologies in the TSMC 65 nm CMOS process as design examples—an inductive degenerated low-noise amplifier (LNA) and a common source amplifier (CSA). The compensation method presented can be utilized to stabilize the gain of a wide variety of amplifiers.