Trigeminal Neuralgia Alleviation on Demand with an CMOS SoC Using Currentmode Pulsed RadioFrequency Stimulation This paper presents a design of batteryless CMOS systemonachip (SoC) with dualmode programmable pulsed radiofrequency (PRF) stimulation, temperature detection, and wireless communication for trigeminal neuralgia alleviation on demand. The system is capable of providing square wave, sinusoid wave, and patterned stimulation waveform, and the stimulation parameters which include pulse frequency, amplitude, duty cycle, and pulse duration, can be wirelessly reconfigured by the external handheld device. The temperature sensor incorporated with analog frontend circuit can detect the temperature of body and SoC chip for the prevention of possible abnormal operation. All the information of stimulation parameters and temperature can be realtime monitored by a handheld device through wireless communication, which follows medical implanted communication system (MICS) standard. This SoC chip, whose dimension is 3.11 xc3x97 2.73 mm2, is fabricated in standard 0.35um CMOS process and mounted on a compact test board, whose size is 2.6 xc3x97 2.1 cm2, for delivering PRF stimulation in animal studies.

Shared wireless link codesign for implantable device with farfield wireless power transfer Implantable devices are nowadays commonly used in medicine. However, these devices run mostly on batteries, leading to a finite lifetime due to the required battery replacement. Since wireless power is almost available everywhere, a suitable way to avoid battery replacement would be to recharge them wirelessly using wireless power transfer. As these implantable devices mostly feature a single antenna, it must be shared to communicate and to receive power. In this way, a circuit that turns off the communication blocks and other circuits while recharging is needed. In this paper, an RF CMOS frontend with farfield wireless powering for implantable devices with a power management module will be presented. This circuit is able to control the frontend circuits when the battery reaches predefined operating voltages.