LAUSR

For the first time, a fully current-mode CMOS cube-law generator (cuber) that gives output in four quadrants is presented. The proposed circuit design is based on translinear principle of MOSFETs operating in weak inversion region. The details on circuit synthesis have been given and the second-order effects on the performance of the cuber have also been considered in this communication. Validation by post-layout simulation have been carried out on Virtuoso-SPECTRE tool with 180 nm GPDK CMOS process parameters. It has been found that using ± 0.5 V supply voltage, the realized current mode cuber circuit works for an input range of ± 200 nA (± 8 normalized input range) while consuming only 139.9 nW static power and contributes a maximum of ± 1.5 dB error over a wide input range of ± 25 nA to ± 200 nA in all four-quadrants.