High-precision MOS-trans-linear loop-based squarer/divider circuit free from mobility reduction

Considering second order effects caused by mobility reduction, an MTL-based squarer/divider circuit is designed. Although mobility reduction is a difficult phenomenon to be modelled in a MOS translinear loop, the presented analysis provides a good way to cancel this effect. Our design results in a simpler solution than previous works and since it is not based on the simple square-law behaviour of MOS transistor, we can use transistors with shorter channel length in comparison with conventional MTL-based circuits, so lower silicon area and more accuracy is achieved.