New topologies for OTRA based programmable precision half-wave and full-wave rectifiers

This paper presents new topologies for programmable precision rectifiers designed using Operational Trans-Resistance Amplifiers (OTRA). Topologies for Half-Wave Rectifiers (HWR), and Full-Wave Rectifiers (FWR) working in both positive and negative rectification modes are proposed. The variation of the voltage transfer curves (VTC) with change in the bias voltage, and the ability to set the gain by reworking the resistor values are included. The functional verification of proposed circuits is carried out using Cadence Virtuoso tool using SCL's 180nm technology. Effect of process corner and temperature variations was also studied, and it is observed that the circuits are resilient.