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  • Novel architecture of four ...
    Raj, Ajishek; Bhaskar, Data Ram; Kumar, Pragati

    Analog integrated circuits and signal processing, 09/2021, Letnik: 108, Številka: 3
    Journal Article

    In this communication, a current feedback operational amplifier (CFOA) based novel architecture of voltage-mode analog multiplier/divider circuit has been proposed. The proposed circuit employs a single CFOA and four MOSFETs. The multiplier circuit can operate in four quadrant modes, whereas, the divider circuit can operate in two quadrant modes. The applications of the proposed multiplier circuit in amplitude modulator, squarer, and frequency doubler circuit have also been presented. To check the robustness of the proposed circuit, mismatch analysis, process corner-voltage-temperature analysis, and Monte-Carlo simulations have been performed. Noise analysis has also been carried out and the output noise for multiplier and divider circuits are found to be below 0.28 μV /sqrt(Hz). The presented circuit has been simulated with CMOS CFOA implemented using 0.18 μm TSMC technology parameters.