Floating parallel lossy inductance, parallel lossy capacitance, parallel C‐D, and lossless capacitance multiplier circuits using current feedback operational amplifiers

• Published in: International journal of circuit theory and applications 2024-03, Vol.52 (3), p.1489-1517
• Main Authors: Bhaskar, Data Ram, Shrivastava, Meghana, Raj, Ajishek, Kumar, Pragati
• Format: Article
• Language: English
• Subjects: AD844; Butterworth filters; Capacitance; Circuits; Compensators; Controllability; Current feedback amplifiers; current feedback operational amplifier; floating capacitance multiplier; floating parallel R‐C; floating parallel R‐L; Inductance; Multipliers; Operational amplifiers; Simulation; Topology; Transient analysis; Workability
• ISSN: 0098-9886; 1097-007X
• DOI: 10.1002/cta.3828

Summary A new synthetic floating simulator topology is proposed which realizes lossy parallel inductance (R‐L), lossy parallel capacitance (R‐C), lossy parallel C‐D, and lossless floating capacitance multiplier (FCM) circuits using only three current feedback operational amplifiers (CFOA) as active elements and three impedances. In all the presented circuits, the value of L, C, and D is independently controllable through a single resistance without requiring any matching condition for passive elements. A novel feature of the proposed circuit involves a straightforward adjustment in the CFOA connections, allowing the circuit to function as either a floating lossless immittance simulator or a floating series‐type lossy immittance simulator. Various application examples of the presented circuits such as lead compensator, lag compensator, first‐order high‐pass filter, and fourth‐order Butterworth filter are also given to justify the theoretical analysis. To validate the workability of the proposed circuits, several analyses are conducted, including frequency analysis, transient analysis, Monte‐Carlo analysis, and temperature analysis, using the macro‐model of AD844 in the SPICE simulation tool. Experimental results of the parallel R‐L simulator and application examples are also provided using commercially available IC AD844‐type integrated CFOAs. A new synthetic floating simulator topology is proposed which realizes lossy parallel inductance (R‐L), lossy parallel capacitance (R‐C), lossy parallel C‐D, and lossless floating capacitance multiplier (FCM) circuits using only three current feedback operational amplifiers (CFOA) as active elements and three impedances. In all the presented circuits, the value of L, C, and D is independently controllable through a single resistance without requiring any matching condition for passive elements. A novel feature of the proposed circuit involves a straightforward adjustment in the CFOA connections, allowing the circuit to function as either a floating lossless immittance simulator or a floating series‐type lossy immittance simulator. Various application examples of the presented circuits such as lead compensator, lag compensator, first‐order high‐pass filter, and fourth‐order Butterworth filter are also given to justify the theoretical analysis. To validate the workability of the proposed circuits, several analyses are conducted, including frequency analysis, transient analysis, Monte‐Carlo analysis, and temperature anal