TO-CMOS buffers, comparators, folded cascode amplifiers, systems and methods

摘要

An integrated circuit buffer includes an input differential amplifier with a first current source transistor and a network with second current source transistors and cascode transistors loading the differential amplifier. Further included is a network having transistors and a resistance connected to introduce bias voltages to the first and second current source transistors to set a common mode level for the cascode transistors wherein the bias voltages are generated by the network independently of said common mode level. The bias voltages establish a respective lesser current from the first current source transistor and a greater current from the second current source transistors connected to the cascode transistors. Other circuits, devices, systems and methods are also disclosed.