New current-mode precision full-wave rectifier employing single inverted Z-copy current differencing buffered amplifier.

The objective of this paper is to introduce a new current-mode precision full-wave rectifier configuration using a single inverted Z-copy current differencing buffered amplifier (IZC-CDBA) and two nMOSFETs. The unique feature of the proposed configuration is that it can produce simultaneously both the inverting and non-inverting rectified outputs without changing its architecture. The use of only active components makes the configuration more suited for IC implementation. Moreover, it features low input impedance and high output impedance, making it fully cascadable. In addition, the new design enjoys extremely high-frequency operations. The effects of non-ideal transfer gain and parasitic impedances on the designed circuit are also explored. The functionality of the proposed circuit is tested by PSPICE simulations for two distinct types of IZC-CDBA realization. The CMOS-based realization is checked through TSMC 0.18 µm level-7 technology parameters. The average DC current output, input dynamic range (± 450 µA), power consumption, temperature, total harmonic distortion (below – 30.2 dB), noise, and Monte-Carlo studies are performed to judge the efficiency level. The findings of the simulations match up nicely with the theoretical analysis. As an application of the suggested full-wave rectifier, RMS and average value computation for a sinusoidal signal is also provided. [ABSTRACT FROM AUTHOR]