Abstract
A real-time capacitor compensation (RCC) scheme is proposed for
low power wearable inductive coupling transceiver. To compensate
for the dynamic parameter variations in real time, the inductance
value is monitored and its resonance frequency is adjusted by additive
capacitors. RLC bridge for detection of the inductance variations and
the dual-edge sampling comparator for recognition of the variance
direction are proposed. The proposed transceiver consumes only
426.6µW (102.6µW for TRX and 324µW for CDR) in a 0.18µm
CMOS technology. And the compensation time takes only 4.78µs,
including 3µs of detection and 1.78µs for compensation process in
worst case.