Synthesis : A Proposed Approach to Design VFs

An automatic methodology focused on the synthesis of voltage followers (VFs) at the transistor level is introduced. The synthesis procedure is executed in four basic steps: selection of a generic cell composed of nullators; the manner in which a norator is added to form joined nullator-norator pairs; addition of the biasing circuitry and finally; synthesis of each joined pair by a BJT or a MOSFET. The best transistor-circuit design is selected among all the generated combinations according to their frequency response calculated using SPICE. Key-Words: Analog Design Automation, Circuit Synthesis, Transistor Circuits, Biasing Techniques, Nullor.