Despite the fact that (high-Q) inductors are not available in a CMOS technology they can be realized, e.g., on an MCM substrate or be simply included in the package. This limits adiabatic switching with inductors to designs which use only a few external inductors, such as pulsed power supply or adiabatic clocking [12, p210]. Yet, this means that at least parts of the logic circuitry can operate quasi adiabatically (with respect to (D.1)), although the overhead can be quite considerable [58, pp65-97].
Another approach proposes the stepwise charging of a capacitance through a series of N MOSFETs and voltages as shown in Fig. D.3, reducing the dissipated energy by a factor of N. The voltages at the tank capacitors will assume approximately the values .