Abstract
A new family of low-voltage log-domain differentiator topologies is introduced in this manuscript. Their attractive characteristic, in comparison to the already published structures, is that the minimum supply voltage requirement is equal to a base-emitter voltage plus twice the saturation voltage of MOS transistors operated in strong inversion, giving potential for employment in modern low-voltage environments. The realization of the corresponding transfer function is achieved by introducing a set of complementary operators which allow the realization of low-voltage active building blocks in the log-domain. Both linear and non-linear performances of the introduced configurations have been studied through simulation results.
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