In this paper a universal nth order current-mode filter employing electronically tunable second-generation current conveyors (ECCIIs) and grounded passive elements is proposed. Since the current gain of the ECCII can be controlled electronically by adjusting the ratio of DC bias currents, it is possible to tune all the coefficients of the transfer function independently through the variable cur...

A realization scheme of an electronically tunable multi-terminal floating nullor (ET-MTFN) is described in this paper. The proposed circuit mainly employs a transconductance amplifier, an improved translinear cell, two complementary current mirrors with variable current gain and improved Wilson current mirrors, which provide an electronic tuning of the current gain. The validity of the performa...

Tunable narrow-linewidth lasers first became commercially available around 20 years ago with the development of etalon-narrowed CW dye lasers from manufacturers such as Coherent and Spectra-Physics. By 1977, high-end research systems could produce linewidths as narrow as 1 MHz under basic microprocessor control. Evolution of these lasers continued with the introduction of higher-gain ring laser...

Abstract We propose a scheme to realize various non-Hermitian topological phases in topolectrical (TE) circuit network consisting of resistors, inductors, and capacitors. These are characterized by topologically protected exceptional points lines. The positive negative resistive couplings R g the provide loss gain factors which break Hermiticity Laplacian. By controlling , lines can be modulate...

We review the introduction of the space dimension into fiber-based technologies to implement compact and versatile signal processing solutions for microwave and millimeter wave signals. Built upon multicore fiber links and devices, this approach allows the realization of fiber-distributed signal processing in the context of fiber-wireless communications, providing both radiofrequency access dis...

We design an all-optical tunable delay line based on both dispersive and wavelength conversion stages involving modulational instability of a twofrequency pump field propagating in a highly birefringent fiber. More precisely, we numerically show that, by varying the frequency separation between the two orthogonally polarized pump waves, we achieve a controllable and continuous delay of hundreds...