Analysis and design of an inverter-based 2-stage current mirror OTA

This video presents an inverter-based two stage current mirror OTA with 60dB gain at low frequencies and more than 500MHz unity gain bandwidth. The video analyses and design an example in 45nm CMOS IC process. The presented design is fully self-contained including transistor sizing and biasing, but the biasing C and R and chosen too large so that the attention can be on the design for AC specifications. There is room for optimization, but making a few assumptions, like using similar size transistors, simple biasing structures and so on, quickly a near-optimal performance can be achieved. The video discusses also the Miller effect and the Miller compensation in two-stage amplifiers.