Electron pumps are devices delivering a quantized current when driven at a frequency
f: I=Nef, where N is an integer and
e the electron charge. Electron pumps capable of delivering a current higher than 100 pA (corresponding to
f >600MHz) with sufficient accuracy are likely to become the direct mise en pratique of the possible new quantum definition of the ampere which will be based on fundamental constant
e, which will be fixed.