A Nonlinearity-Compensated All-MOS Voltage-to-Current Converter

A new resistorless linear voltage-to-current converter (VCC) utilizing ten MOS transistors is described. The circuit uses saturated MOS transistors with different threshold voltages to produce an output current that is linearly related to the input voltage. The compensation of high-order nonlinear errors is also presented. The VCC has been fabricated using a 0.18-μm standard CMOS technology. Measured results show that the proposed VCC achieves nonlinearity of less than ±2.2% in the input voltage range of 1.3-3 V with maximum power consumption of 0.21 mW and effective chip area of 2200 μm
²
.