Circuitry for and method of power efficient operation of, and energy
recovery from, tissue-stimulating electrodes having high charge
capacities. Post-stimulation energy is recovered from the electrodes
through a variety of techniques into circuit elements such as other
electrodes, an intermediate distribution system, a power supply or any
other elements, through the use of sequential switching. Energy is also
recoverable from the intermediate distribution system, which preferably
is comprised of one or more storage capacitors operating a different
voltages. Efficient power transfer among circuit elements is effected by
transferring energy while limiting element-element voltage differences
and/or voltage differences between the elements and the capacitances of
the electrodes.