A 0.18-μm CMOS Squarer Circuit for a Non-Coherent UWB Receiver

Squaring circuits are an important building block for impulse-radio UWB non-coherent receivers. This work proposes a squarer, based on the quadratic law of saturated transistors. Such a circuit has already been proposed for lower frequency applications, therefore this work focuses on the extension to ultra wide bandwidth, with particular care to the consequences related to the deviation from the ideal quadratic law of 0.18μm CMOS transistors. Simulation results prove that the proposed squarer can accommodate the whole UWB bandwidth, with a total power consumption of 1.7mW.