Abstract
Precision rectifier finds application in a number of measurement and instrumentation systems. Earlier op-amps were used to implement precision rectifiers by connecting diodes in their feedback loops. Due to very high gain those circuits were capable of rectifying voltages even in millivolts. However in high frequency regions op-amps would not be a good choice because of their finite slew rates. The operational transresistance amplifier (OTRA) can be used as an alternate active block for low voltage rectification in high frequency range. This paper presents an OTRA based half wave rectifier (HWR). Its operation is validated through SPICE simulation, wherein OTRA is implemented using current feedback operational amplifier (CFOA) which is commercially available as AD844 IC. The simulation results are in conformation with the proposed theory.
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