Akademik Veri Yönetim Sistemi
29th ACM/IEEE International Symposium on Low Power Electronics and Design, ISLPED 2024, California, Amerika Birleşik Devletleri, 5 - 07 Ağustos 2024
In this work, a wireless power and data transmission system (WPDT) for fully implantable cochlear implants that operates with a broad range of input power is implemented. In this inductive link, power conversion efficiency is maximized by switching the operation modes of the multi-mode rectifier according to the power sourcing capability under varying coupling conditions. These operation modes are named as half wave mode (HWM) and voltage mode (VM). While the input power of the transmitter is generated with a Class-E power amplifier, data transmission is conducted with differential binary phase shift keying. A large gain common gate amplifier is utilized to compensate variable input signal level. Data and carrier recovery is realized by an asymmetric charge-discharge structure with threshold detection. This novel WPDT circuit is implemented and fabricated in TSMC 180 nm BCD Technology with an active area of 1.2 mm2. Average charging power values of the system for a 3.3 V load are measured as 42.96 mW, 38.90 mW, and 60.10 mW for only HWM, only VM, and mixed mode rectification for a transmitted power range of 10 - 140 mW. Meanwhile, BPSK demodulator consumes only 22.8 - 24.1 μW power and has a bit error rate (BER) range of 3.0x 10-3 - 2.8 x 10-6 depending on receiver coil voltage level (50 - 300 mV).