Developments in linear and nonlinear FET circuit design using derivative superposition

This paper describes a number of emerging results pertaining to a circuit design technique called derivative superposition. A number of different approaches to designing both linear and nonlinear circuits with derivative superposition are described. Limitations of currently available CAD models are identified. The measured performance of a 100 mW power amplifier, a broadband frequency doubler and a frequency tripler designed with derivative superposition are presented.