Electronically tunable grounded immittance simulators using an EX-CCCII

ABSTRACT

In this paper, electronically tunable grounded immittance simulators are presented. Each of the proposed circuits employs a single Extra X Current Controlled Current Conveyers (EX-CCCII) and a single grounded capacitor. First, two circuits provide lossless positive grounded inductance. These circuits offer different lossless/lossy immittance circuits with some changes in the connection at the Z-terminals of EX-CCCII. The circuits do not require any constraint for component matching and exhibit low parasitic effects. The circuits can be tuned electronically by varying the bias current of EX-CCCII. As application examples, some of the proposed circuits are used to realise a tunable second-order band-pass filter and a tunable high pass filter. The functionality of the proposed immittance simulators is verified through PSPICE simulation using 0.25µm TSMC CMOS technology parameters. The experimental results are also included using commercially available IC’s AD-844.