In this work, a novel currentmode square-wave generator is proposed. The circuit, whose working principle is based on a current differentiation instead of voltage integration, has been designed in a standard CMOS technology with low voltage (±1V) and low power (430µW) characteristics. Simulations and experimental measurements have confirmed the theoretical expectations showing a high linearity and a wide oscillation frequency range, which can independently be adjusted through either capacitive (in the range pF?µF) or resistive (in the range M??G?) external passive components