INTEGRATED VOLTAGE RECTIFIER-MULTIPLIER FOR SUPPLYING LOW-POWER WIRELESS PASSIVE MICRODEVICES

Abstract

Concerning automation technologies development and their deployment to logistics, commerce, industry, constructional engineering and other economy sectors, wireless systems get more widespread due to their convenience and availability. Most of the time miniature devices able to perform operations of identification, ambient parameters measure, receive and transmit of signals are used in such systems. In return, there are number of areas, in which battery devices using is limited since a change of a low battery is not always feasible and viable. The passive devices gathering energy for operation through radiofrequency radiation receiving by antenna from the environment could be utilized in such applications. The integrated implementation of microcircuit is required for mass production of suchlike inexpensive devices. The voltage rectifier with multiplication function is the key module of these microcircuits supply unit. Results of the voltage rectifiersmultipliers design using typical CMOS processes CM018G 180 nm and HCMOS8D 180 nm and Cadence IC CAD are presented in the work. Degree of threshold voltage and number of stages influence on the multipliers output characteristics is considered. It is shown, that in eight-stages multiplier constructed with HCMOS8D process, output voltage needed for supply of wireless device microcircuit is reached at input voltage amplitude of 375 mV, and in sixteen-stages multiplier - at 300 mV amplitude. The proposed rectifier-multipliers could be used at power supplies design of the wireless passive devices.