A new settling-time-oriented design strategy for two-stage operational amplifiers with current-buffer Miller compensation
is presented. The proposed approach defines a systematic procedure to optimize the amplifier time response, allowing the required
speed performances to be achieved without both power wasting and blind efforts for time-consuming trial-and-error design processes.
To demonstrate the effectiveness of the methodology, a design example in a commercial 0.35 μm CMOS technology is presented.
As shown by circuit and statistical simulations, the proposed strategy proves to be very useful to develop fast-settling operational
amplifiers for typical discrete-time applications, such as switched-capacitor filters and ΣΔ analog-to-digital converters.
Keywords Operational amplifiers - Frequency compensation - Transient response - Pole-zero analysis - Switched-capacitor integrator - CMOS analog integrated circuit design