  We propose effective generation of entangled and squeezed states in an
optoelectromechanical system comprising of a macroscopic LC electrical circuit
and an optomechanical system. We obtain enhanced entanglement between optical
and LC circuit modes that are coupled via a common mechanical mode in the
microwave regime. We achieve this enhancement by a stepwise application of
modulation in the laser drive, the voltage drive and the spring constant of the
moveable end-mirror. The maximum amount of entanglement is observed to be
primarily dependent on the voltage modulation and changes slightly with the
parameters of the spring constant. Alongside the generated entanglement, we
also study the variation of the maximum degree of squeezing in the mechanical
mode for different parameter regimes.
