An implantable RF-powered dual channel stimulator

Abstract

An implantable RF-powered dual channel stimulator was designed for hip stabilization. The approach included: small size, low power consumption, external powering, adjustable output current stimulus, dual channel operation an hermetic sealed electronic packaging. Thick film hybrid circuit techniques were used. The circuit and RF powering scheme were designed for low power operation with compromise to allow for linear and lateral displacements between the transmitting and receiving antenna. The output stimuli are biphasic negative going current pulses of 175 microseconds duration and 0-5 mA amplitude. Hermeticity is provided by enclosure of the electronics in a flat pack and subsequent epoxy coating of the implant assembly.