CFOA Based Negative Floating Capacitance Multiplier

摘要

Abstract A floating negative capacitance multiplier circuit is proposed in the paper utilizing only two Current Feedback Operational Amplifiers (CFOAs) and total of three passive elements including two resistors for tuning the multiplication factor and a low valued integrated capacitor. The design does not need any matching conditions and possesses a very high multiplication factor with operational bandwidth of 1 MHz. The potential electronically tunable and temperature insensitive topology is also portrayed with no passive elements by incorporating Operational Trans-conductance Amplifier (OTA). Application in parasitic capacitance cancellation circuit is discussed in brief with SPICE simulations attached in support. A 100 Hz notch filter is also realized to observe the effectiveness of the design.