An Automatic Tuning System to Improve Near-Field Powering in Implanted Electronics

Developments in the field of inductive charging have opened the door to the use of devices without a battery or with a wireless rechargeable battery. Although this aspect is significant in the field of wearable devices, it is even more significant in the field of transcutaneous connections for implanted electronics and batteries that can greatly benefit the safety and comfort of the patient. The performance on the ability to transmit and store energy through an inductive channel can, however, be influenced by various environmental and manufacturing factors, with significant variations on the effective values of the LC resonant pair. In this regard, an automatic tuning mechanism based on a SAR algorithm implemented in 180nm CMOS technology is proposed.