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In this paper, a grounded voltage controlled resistor (GVCR) employing eight CMOS transistors, all of which are operating in saturation region, is proposed. The developed GVCR has two identical control voltages in opposite sign for electronically changing the resistance value. The linearity of the current-voltage (I - V) characteristic of the proposed GVCR is not affected by the body effect of the transistors. Computer simulation results with SPICE program are given to exhibit the performance and effectiveness of the introduced GVCR.

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Abstract:In this paper, a floating capacitance multiplier including two multioutput differential voltage current conveyors, two grounded resistors, and a grounded capacitor is proposed. The proposed floating capacitance multiplier can realize high capacitor values with two small-valued resistors. It is more suitable for integrated circuit technology because it has only grounded passive components without needing any critical passive component matching conditions. Its performances are examined with several simulations using the SPICE program. As an application example, a third-order notch filter using three resistors and three capacitors is given.

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