A class-E tuned power oscillator for inductive transmission of digital data and power

An innovative method for the transcutaneous transmission of RF power and signal via an inductive link is presented. The system is based on the single-ended class-E power amplification scheme. A self oscillating class-E tuned power amplifier involving an inductive link permits high-efficiency coupling-insensitive power transmission. The oscillation frequency is not fixed, but influenced by the coupling of the coils. The oscillator shows excellent switching behavior. Transmitting digital data is performed simply by switching the oscillator on and off (amplitude shift keying, ASK). The realization of the system requires a small number of circuit components. It is employed for transcutaneous transmission of digital data and power in a cochlear prosthesis system