A novel single DVCCTA based electronically tunable, wideband, four-mode instrumentation amplifier

This paper describes a new instrumentation amplifier (IA) that has the ability to operate in all four possible modes: voltage, current, transimpedance, and transadmittance mode using a single Differential Voltage Current Conveyor Transconductance Amplifier (DVCCTA) along with external grounded resistors. The suggested IA structures offer a broad range of common mode rejection ratio bandwidth (BW) and differential gain (Adm) bandwidth of around (18.7 MHz, 26 MHz) for voltage mode, (17.29 MHz, 1.05 GHz) for current mode, (25.25 MHz, 168 MHz) for transimpedance mode and (17.29 MHz, 1.05 GHz) for transadmittance mode respectively, in which an unreported finding of 1.05 GHz gain BW underscores the uniqueness of the designs. Additionally, they are suitable for IC integration due to the available grounded passive attributes. Moreover, the designs come with an interesting feature for electronically tuning the gains via biasing current (IB) and also have a low power dissipation. Realization of DVCCTA uses 20MOS transistors, and OrCAD PSPICE with a 0.18 μm TSMC CMOS technology parameter is used to authenticate the workableness of the proposed IA circuits. The performance of the suggested topologies is analyzed by considering the non-idealities of the DVCCTA. Apart from that, process, voltage, temperature-dependent variations and Monte Carlo simulations are also delineated for the verification of the proposed designs. The functionality of the circuits has also been validated through practical experimentation, employing commercially accessible current feedback operational amplifiers, such as the ICAD844 and post layout simulations. The simulation results correlate well with the theoretical prediction.