POWER CONTROL AND MONITORING ARRANGEMENT

Current flow monitoring, from which a power dissipation metric in a load circuit may be obtained, is often performed using a current sense resistor. However, this implies extra circuit complexity. This application discusses a way to derive an indication of power consumption in a situation where an efficient load, is present, without the use of a current sense resistor, or the associated electronics. A nebulizer is an example of a device used for providing a medicament to a patient via their respiratory tract. A nebulizer typically comprises a reservoir for storing the medicament, in fluid communication with a means for converting the medicament to an aerosol. Knowledge of the power dissipation of such devices is useful.