We report here the fabrication of Schottky barriers using polyaniline and insulating polymers like polymethylmethacrylate (PAni-PMMA) blends. The Schottky barriers were prepared by the thermal evaporation of gold metal electrodes on to freestanding films of the blends. The electrical characteristics of the barriers are found to depend on the work function of the PAni-PMMA blend, which in turn depend on the volume fraction of PAni. Current-voltage (I-V) and capacitance-voltage (C-V) measurements were used to characterize these devices. The values of various junction parameters such as ideality factor, barrier heights and rectification ratio were calculated.