The Fully Differential Ring Amplifier with Wide Output Voltage Range Using Correlated Level Shifting Technique for The Pipelined ADCs

This paper describes the fully differential ring amplifier with wide output voltage range using correlated level shifting for the pipelined analog to digital converts. In the fine process, the problem of ring amplifier is low dc gain and narrow output voltage range. To overcome these problems, we proposed the novel ring amplifier using cascode circuit and correlated level shifting. From the simulation results, it is confirmed that the proposed circuit improves the gain and output voltage range compared to conventional circuits. Details are given in the paper.