A Silicon-based Voltage Doubler: Preliminary Results

This paper presents experimental results of a DC-DC converter based on the SC approach. In this design to power digital circuitry a 1.5 V voltage source has been used to emulate the energy to be supplied by a single battery. The voltage source is useful also to start the times2 operation. In order to operate in a correct way the MOS switches a boost circuit based on a single NMOS gain stage was also integrated. A p-n diode in conjunction with the boost circuit define an initial condition V_OUT(t=0)=V_bi. The capacitors used are external components. This project has been designed according technological design rules of a 1.5 mum CMOS process. From experimental results we can conclude that the error between experimental data and theory is of the order of 2%