In most biomedical implant designs, the rectifier block is
either a hybrid diode bridge [8], [10], which increases the
number of off-chip components and the size of the implant or
an inefficient half-wave rectifier using the substrate diode [7].
Using a full-wave bridge rectifier [3] on the other hand,
significantly reduces the implant size and also helps the
regulator to achieve better AC-DC conversion efficiency (as
compared to a half-wave rectifier). Implementing an on onchip
full-wave rectifier in the CMOS technology also leads to
the added value of being fast enough to operate in the MHz