A New High Multiplication Factor Tunable Grounded Positive and Negative Capacitance Simulator

This paper presents a CMOS grounded tunable capacitance multiplier with high multiplication factor. The proposed circuit uses the translinear loop stage and two OTAs stages. The MOS transistors are biased in subthreshold region to provide high multiplication factor. The total multiplication factor is widely tunable and can be up to 1200 times of the value C with maximum error of 8%. The circuit is simulated using TANNER TSPICE with 0.18μm TSMC level 49 technology. The circuit operated using ± 0.75 supply voltage and it works in low frequency under 10KHz which satisfies the requirements of biomedical and low frequency applications.