Patent ID: 8122880

Claim:
An apparatus for delivering a pharmaceutical product comprising: a first driver element to generate acoustic energy, the first driver element generating acoustic energy in pulses that are of a short duration and low frequency such that a droplet of pharmaceutical product is output from a capillary wave; a first acoustic lens positioned between the first driver element and the capillary wave to focus the acoustic energy generated by the first driver element; a delivery system to maintain the pharmaceutical product in a position to receive the acoustic energy from the first acoustic lens and cause ejection of the droplet of pharmaceutical product; a portable energy source to provide energy to the first driver element; and a second driver element coupled to the portable energy source to provide drive signal to ejectors that eject droplets of the pharmaceutical product, wherein the second driver element includes a multiplexing circuit that directs RF energy from the portable energy source to alternately switch groups of the ejectors on and off.