Current and transconductance mode full/half‐wave rectifiers realized with only one active block

Abstract

SummaryThis research paper introduces a novel active building block for full/half‐wave (inverse) rectifier circuits, eliminating the need for passive elements. The paper presents two alternative implementations: a current mode approach utilizing MO‐CFTA (multiple output current follower transconductance amplifier) and a transconductance mode approach utilizing MO‐VDTA (multiple output voltage differencing transconductance amplifier). Both circuit configurations exhibit favorable zero‐crossing characteristics and exceptional linearity. The transconductance mode rectifier enables electronic control of the output current signal by adjusting the applied bias currents. The circuits are designed with simplicity and compactness in mind, making them highly suitable for integration into IC circuits. The analysis investigates the impact of non‐idealities and parasitic effects, although the absence of passive elements results in minimal parasitic effects. Simulation results conducted using 0.18‐μm CMOS technology and a ±0.9‐V supply voltage align closely with the theoretical predictions. Furthermore, Monte Carlo simulations and corner analysis are employed to evaluate the circuit's robustness. To validate the feasibility of the proposed solution, experimental tests are performed using commercially available components. The designs are implemented on Cadence Virtuoso, and post‐layout measurements are conducted to further verify the proposed solutions.