A 635 μW non-contact compensation IC for body channel communication

A low-power non-contact compensation IC for body channel communication (BCC) is proposed. The proposed IC has 3 key building blocks. First, a contact status detection unit (CSDU) based on a capacitance sensor is adopted. Second, non-contact compensation unit (NCU) with inductor and capacitance bank is proposed. Third, a reconfigurable low noise amplifier (LNA) for impedance matching is adopted. The input impedance of the LNA is controlled by a digital controller for high Q compensation. Thanks to the proposed features, 14 dB channel compensation is achieved and the IC consumed only 635 μW in 65 nm CMOS technology with 1.2 V supply. The proposed work is the first BCC IC with non-contact compensation.