“…There are several methods used to generate data carrier frequencies for implantable devices. Many systems involve the generation of data carrier signals on the external side of the system, leaving only the data recovery, modulation and transmission to the implantable circuitry (Mandal andSarpeshkar, 2008, Zhou et al, 2006). Ziaie et al presented a dual band implantable neuromuscular stimulator, the 2MHz data clock of which is recovered from 2MHz power supply (Ziaie et al, 1997), while Wise et al operated at 4MHz (Wise et al, 2004) as did Sauer et al's (Sauer et al, 2005).…”