Binary transversal filters with quantised coefficients

A binary transversal filter (b.t.f.) consists of a tapped shift register and a set of weighting resistors which determine its impulse response. B.T.F.s are discussed in which weighting coefficients are quantised, resulting in designs which are particularly suited to microcircuit implementation and digital programming of impulse responses. The precision to which frequency-response specifications may be made is determined as a function of the quantisation error. A number of possible applications are discussed.     

Equilibrium and nonequilibrium states in microfluidic double emulsions

We describe experimental and theoretical studies dedicated to establishing the physics of formation of double droplets in microfluidic systems. We show that the morphologies (complete engulfing, partial engulfing, and nonengulfing) obtained at late times minimize the interfacial energy of the system. We explain that nonequilibrium morphologies generated in the system can have long lifetimes. Remarkably, the physics of formation of the double droplets with microfluidics allows the synthesis of particles with new morphologies.