Analysis of Fully Differential Folded-Cascode Cross-Coupled Power Amplifier

A frequency domain design approach can be proposed for an exact transfer function which is in a polynomial form. It can be used to plot various specifications of a fully differential folded cascode operational amplifier such as open-loop voltage gain, closed loop voltage gain, gain-bandwidth product, phase margin and settling time with MATLAB. The usefulness of the graph can be verified by 0.18 micron levell MOSFET transistor model. An experimental approach can be done iteratively for a fully differential folded cascode operational amplifier and its cross-coupled version with ALD transistor array.