  The primary impediment to continued improvement of charge-based electronics
is the excessive energy dissipation incurred in switching a bit of information.
With suitable choice of materials, devices made of multiferroic composites,
i.e., strain-coupled piezoelectric-magnetostrictive heterostructures, dissipate
miniscule amount of energy of ~1 attojoule at room-temperature, while switching
in sub-nanosecond delay. Apart from devising memory bits, such devices can be
also utilized for building logic, so that they can be deemed suitable for
computing purposes as well. Here, we first review the current state of the art
for building nanoelectronics using multiferroic composites. On a recent
development, it is shown that these multiferroic straintronic devices can be
also utilized for analog signal processing, with suitable choice of materials.
By solving stochastic Landau-Lifshitz-Gilbert equation of magnetization
dynamics at room-temperature, it is shown that we can achieve a voltage gain,
i.e., these straintronic devices can act as voltage amplifiers.
