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 $$0.5\, \upmu \hbox {m}$$0.5μm 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.
Highlights
Inductance is a vital component for many analog and mixedsignal circuits and systems
Polytechnic University, Wuhan, China needed if operational frequency of a circuit is not very high, but they are difficult to be integrated into an integrated circuit (IC) due to the large chip area required
The most commonly used structures of these inductor simulators are composed of multiple passive components and complicated operational modules such as current conveyor (CC) [2,3,4,5], current feedback operational amplifier (CFOA) [6], operational trans-conductance amplifier (OTA) [7], current backward trans-conductance amplifier (CBTA) [8] and current differencing buffered amplifier (CDBA) [9]
Summary
Inductance is a vital component for many analog and mixedsignal circuits and systems. The most commonly used structures of these inductor simulators are composed of multiple passive components and complicated operational modules such as current conveyor (CC) [2,3,4,5], current feedback operational amplifier (CFOA) [6], operational trans-conductance amplifier (OTA) [7], current backward trans-conductance amplifier (CBTA) [8] and current differencing buffered amplifier (CDBA) [9] This is because that they attempt to achieve functional flexibility, i.e., to be reconfigured to form other circuit functions such as frequency dependent negative resistor (FDNR), while aiming at low-frequency applications.
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