Hello...I am trying to implement a system(for the time being on paper) whereby i have a dc voltage source of 2V, and i have to generate dc voltages of 2V,4V,6V...20V to charge capacitors....i also have a clock signal of 2V(peak-to-peak)...now i may multiply the 2V using a charge pump IC....but it can only be multiplied upto 8 V right????(current available is negligibly small at this stage itself)....Is there any way to generate voltages as high as 20V????