An improved CMOS-based inductor simulator with simplified structure for low-frequency applications

Abstract

In this paper, an improved inductor simulator structure is presented, which can be configured as either grounded or floating inductor simulator with low component count. To achieve simplified structure, inductor simulator circuits are designed using a minimal number of transistors and small capacitance, rather than the complex components/modules such as current convey and operational trans-conductance amplifier which are traditionally used. The simulation results based on 0.5 µm CMOS process parameters show that the proposed structure is able to produce a broad range of inductance values and compared to other similar structures, it provides wider operational frequency bandwidth for the same or comparable inductance value. Furthermore, the structure can be implemented with much smaller chip area using a small capacitance in the circuit, but at the price that it has a higher minimum operational frequency compared to other structures.

Single operational transresistance amplifier‐based grounded resistance‐controlled synthetic inductor configuration

“…Simulated lossy inductors, on the other hand, which require lower count of active and passive components and contain less stringent component matching constraints for their realization compared to simulated lossless inductors, find numerous applications in the design of signal processing and generation circuits 2 . In the last four decades, different research groups have reported a large number of active inductor simulators (both in grounded and floating form) employing different ABBs such as operational amplifiers, current conveyors and their variants, operational transconductance amplifiers, current feedback operational amplifiers, current differencing transconductance amplifiers, current following transconductance amplifiers, and many more 3–35 . An operational transresistance amplifier (OTRA) is yet another ABB, which offers additional capability of having virtual ground at its two input terminals which is helpful for eliminating the influence of parasitic impedances of these terminals.…”