A ±5-V CMOS analog multiplier

A four-quadrant CMOS analog multiplier is presented. The device is nominally biased with ±5-V supplies, has identical full-scale single-ended x and y inputs of ±4 V, and exhibits less than 0.5% nonlinear error at 75% of full-scale swing. Operation with supplies as low as ±2.5 V is also possible. A comparison of theoretical and experimental results obtained from fabrication of the multiplier in a 3-μm p-well CMOS process is made.