A 100 Mb/s 0.36 mW injection locked clock and data recovery circuit for WBAN transceivers

Abstract

Coexistence of various on-body and intra-body biomedical ICs call for the need of inter-device data communication at high speeds with ultra lower power consumption and smaller footprint. To address these needs, this work presents an injection locked clock and data recovery (CDR) circuit in 65 nm CMOS for body channel communication transceivers that employ direct digital transmission. The CDR utilizes pulses generated due to the high pass nature of body channel from transmitted digital data and injects them directly into the VCO to recover the clock. The injection locking achieves instantaneous clock and data recovery compared to conventional PLL based CDR circuits for data rate of 100 Mb/s. With a low power consumption of 0.36 mW and a small footprint of 0.07 mm2, the proposed CDR helps further miniaturization of battery operated biomedical ICs.