Abstract
A new circuit realization of capacitance multiplier based on active block, current follower differential input transconductance amplifier is introduced in the paper. The circuit employs one current follower differential input transconductance amplifier, two resistors and one capacitor. The proposed capacitance multiplier has a good range of multiplication factor (up to 30). Multiplication factor of the proposed circuit is adjustable by external resistor and by bias current as well. The comprehensive study of the proposed circuit including non-idealities and parasitic element effects has been carried out. The proposed capacitance multiplier circuit is simulated on Cadence Virtuoso using 0.18 μm gpdk CMOS technology and post layout simulation results are demonstrated to validate the working of the proposed circuit. The layout of the used active block occupies an area of 26.26 μm × 28.79 μm. The proposed circuit shows good performance against transistors mismatch, process and temperature variations. Moreover, the experimental results of the circuit using off-the-shelf integrated circuits are also carried out to demonstrate its practicality. In the last, the transpose structure of the proposed capacitance multiplier circuit is also explored. The obtained transposed structure is realized using active element namely, voltage differencing buffered amplifier.
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Kumar, A., Singh, D. & Nand, D. A Novel CFDITA-Based Design of Grounded Capacitance Multiplier and Its Transpose Structure. Circuits Syst Signal Process 41, 5319–5339 (2022). https://doi.org/10.1007/s00034-022-02032-4
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DOI: https://doi.org/10.1007/s00034-022-02032-4