A Design Strategy based on gm/ID Method for Critically Damped Ring Amplifiers

J. Soares, N. Paulino (NOVA School of Science and Techn., Portugal), M. Rodrigues (Renesas, Portugal)

This paper presents a design strategy for critically damped ring amplifiers using the g_m/I_D method based on data tables obtained through the electrical simulation of a simple CMOS inverter. Using the open-loop transfer function of the critically damped ring amplifier with the data tables allows for an understanding of how the amplifier's performance metrics change with varying design parameters, offering valuable insights. Based on this analysis, two designs are proposed: one optimized for maximum gain and the other for maximum speed, emphasizing power efficiency. The results of these designs are then compared to the electrical simulations of the amplifiers to confirm the validity of the proposed design strategy.