Improved Linearity CMOS Multifunctional Structure for VLSI Applications

An original improved linearity multifunctional structure designed for VLSI applications will be further presented. The core of the circuit is represented by a differential amplifier based on an original linearization technique. The great advantages of the increased modularity and controllability and of the reduced design costs associated represent an immediate consequence of the multiple functions realized by the proposed structure: amplifying, multiplying or simulating positive and negative resistances. The frequency response and the linearity are strongly increased by implementing original techniques, while the silicon occupied area per function is reduced as a result of the multifunctionality. The simulation confirms the estimated results, showing a linearity error less than a percent for a small value of the supply voltage ±3 V and for an extended input range ±500 mV.