A New Two-Quadrant Squarer/Divider Circuit for true RMS-to-DC converters in MOS technology

In this paper, a new log-domain two-quadrant squarer/divider circuit for current mode RMS-to-DC converters is presented. The proposed circuit has been realized using MOSFET transistors that are operating in weak inverted saturation region. It features very low supply voltage (1 V), low power consumption (<3 μW), two-quadrant input current, wide input dynamic range, immune from body effect and low circuit complexity. Simulation results by HSPICE show high performance of the circuit and confirm the validity of the proposed design technique.

► In this paper a new RMS-to-DC converter that operates in low supply voltage and low power consumption is presented.
► The proposed circuit works in weak inversion and with low circuit complexity.
► The proposed current mode filter is very simple. It employs just a transistor and a capacitor.
► By designing a new splitter at the front of circuit, the converter is able to work in two-quadrant.