Compact implementation of a three stages feedforward operational transconductance amplifier with Miller compensation

This work proposes a novel topology for a three stages Operational Transconductance Amplifier with feedforward g_m paths. The proposed solution enhances the amplifier´s Gain-Bandwidth product and enables capacitive Miller compensation with no appearance of a Right-Half-Plane zero on its transfer function. The main difference with state of the art topologies is that instead of canceling zeroes it locates a Left-Half-Plane zero without using zero nulling resistor or additional active stages. The scheme improves phase response, speed, output swing and reliability on compensation with a minimum increase of power consumption.